use axum::{
  body::Body,
  extract::State,
  http::{header, Request, StatusCode},
  middleware::{self, Next},
  response::{IntoResponse, Response},
  routing::{get, post},
  Json, Router,
};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::net::SocketAddr;
use std::sync::atomic::{AtomicBool, AtomicU16, Ordering};
use std::sync::Arc;
use tauri::AppHandle;
use tokio::net::TcpListener;
use tokio::sync::Mutex as AsyncMutex;
use uuid::Uuid;

use crate::browser::ProxySettings;
use crate::cloud_auth::CLOUD_AUTH;
use crate::group_manager::GROUP_MANAGER;
use crate::profile::{BrowserProfile, ProfileManager};
use crate::proxy_manager::PROXY_MANAGER;
use crate::settings_manager::SettingsManager;
use crate::wayfern_terms::WayfernTermsManager;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct McpTool {
  pub name: String,
  pub description: String,
  pub input_schema: serde_json::Value,
}

#[derive(Debug, Deserialize)]
#[allow(dead_code)]
pub struct McpRequest {
  jsonrpc: String,
  id: Option<serde_json::Value>,
  method: String,
  params: Option<serde_json::Value>,
}

const PROTOCOL_VERSION: &str = "2025-03-26";
const SERVER_NAME: &str = "donut-browser";
const SERVER_VERSION: &str = env!("CARGO_PKG_VERSION");

#[derive(Debug, Serialize)]
pub struct McpResponse {
  jsonrpc: String,
  #[serde(skip_serializing_if = "Option::is_none")]
  id: Option<serde_json::Value>,
  #[serde(skip_serializing_if = "Option::is_none")]
  result: Option<serde_json::Value>,
  #[serde(skip_serializing_if = "Option::is_none")]
  error: Option<McpError>,
}

#[derive(Debug, Serialize)]
pub struct McpError {
  code: i32,
  message: String,
}

const DEFAULT_MCP_PORT: u16 = 51080;

struct McpSession {
  initialized: bool,
}

struct McpServerInner {
  app_handle: Option<AppHandle>,
  token: Option<String>,
  shutdown_tx: Option<tokio::sync::oneshot::Sender<()>>,
  sessions: HashMap<String, McpSession>,
}

#[derive(Clone)]
struct McpHttpState {
  server: &'static McpServer,
  token: String,
}

pub struct McpServer {
  inner: Arc<AsyncMutex<McpServerInner>>,
  is_running: AtomicBool,
  port: AtomicU16,
}

impl McpServer {
  fn new() -> Self {
    Self {
      inner: Arc::new(AsyncMutex::new(McpServerInner {
        app_handle: None,
        token: None,
        shutdown_tx: None,
        sessions: HashMap::new(),
      })),
      is_running: AtomicBool::new(false),
      port: AtomicU16::new(0),
    }
  }

  pub fn instance() -> &'static McpServer {
    &MCP_SERVER
  }

  pub fn is_running(&self) -> bool {
    self.is_running.load(Ordering::SeqCst)
  }

  async fn require_paid_subscription(feature: &str) -> Result<(), McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: format!("{feature} requires an active paid subscription"),
      });
    }
    Ok(())
  }

  pub fn get_port(&self) -> Option<u16> {
    let port = self.port.load(Ordering::SeqCst);
    if port > 0 {
      Some(port)
    } else {
      None
    }
  }

  pub async fn start(&self, app_handle: AppHandle) -> Result<u16, String> {
    if !WayfernTermsManager::instance().is_terms_accepted() {
      return Err(
        "Wayfern Terms and Conditions must be accepted before starting MCP server".to_string(),
      );
    }

    if self.is_running() {
      return Err("MCP server is already running".to_string());
    }

    let settings_manager = SettingsManager::instance();
    let settings = settings_manager
      .load_settings()
      .map_err(|e| format!("Failed to load settings: {e}"))?;

    // Get or generate token
    let existing_token = settings_manager
      .get_mcp_token(&app_handle)
      .await
      .ok()
      .flatten();

    let token = if let Some(t) = existing_token {
      t
    } else {
      settings_manager
        .generate_mcp_token(&app_handle)
        .await
        .map_err(|e| format!("Failed to generate MCP token: {e}"))?
    };

    // Determine port (use saved port, or try default, or random)
    let preferred_port = settings.mcp_port.unwrap_or(DEFAULT_MCP_PORT);
    let actual_port = self.bind_to_available_port(preferred_port).await?;

    // Save port if it changed
    if settings.mcp_port != Some(actual_port) {
      let mut new_settings = settings;
      new_settings.mcp_port = Some(actual_port);
      settings_manager
        .save_settings(&new_settings)
        .map_err(|e| format!("Failed to save settings: {e}"))?;
    }

    // Store state
    let mut inner = self.inner.lock().await;
    inner.app_handle = Some(app_handle);
    inner.token = Some(token.clone());

    // Create shutdown channel
    let (shutdown_tx, shutdown_rx) = tokio::sync::oneshot::channel::<()>();
    inner.shutdown_tx = Some(shutdown_tx);

    self.port.store(actual_port, Ordering::SeqCst);
    self.is_running.store(true, Ordering::SeqCst);

    // Start HTTP server in background
    let http_state = McpHttpState {
      server: McpServer::instance(),
      token,
    };
    tokio::spawn(Self::run_http_server(actual_port, http_state, shutdown_rx));

    log::info!("[mcp] Server started on port {}", actual_port);
    Ok(actual_port)
  }

  async fn bind_to_available_port(&self, preferred: u16) -> Result<u16, String> {
    let addr = SocketAddr::from(([127, 0, 0, 1], preferred));
    if TcpListener::bind(addr).await.is_ok() {
      return Ok(preferred);
    }

    // Try random ports in 51000-51999 range
    for _ in 0..10 {
      let port = 51000 + (rand::random::<u16>() % 1000);
      let addr = SocketAddr::from(([127, 0, 0, 1], port));
      if TcpListener::bind(addr).await.is_ok() {
        return Ok(port);
      }
    }

    Err("Could not find available port for MCP server".to_string())
  }

  async fn run_http_server(
    port: u16,
    state: McpHttpState,
    shutdown_rx: tokio::sync::oneshot::Receiver<()>,
  ) {
    let app = Router::new()
      .route(
        "/mcp",
        post(Self::handle_mcp_post)
          .get(Self::handle_mcp_get)
          .delete(Self::handle_mcp_delete),
      )
      .route("/health", get(Self::handle_health))
      .layer(middleware::from_fn_with_state(
        state.clone(),
        Self::auth_middleware,
      ))
      .with_state(state);

    let addr = SocketAddr::from(([127, 0, 0, 1], port));
    let listener = match TcpListener::bind(addr).await {
      Ok(l) => l,
      Err(e) => {
        log::error!("[mcp] Failed to bind to port {}: {}", port, e);
        return;
      }
    };

    log::info!(
      "[mcp] HTTP server listening on http://127.0.0.1:{}/mcp",
      port
    );

    let server = axum::serve(listener, app).with_graceful_shutdown(async {
      let _ = shutdown_rx.await;
      log::info!("[mcp] HTTP server shutting down");
    });

    if let Err(e) = server.await {
      log::error!("[mcp] HTTP server error: {}", e);
    }
  }

  async fn auth_middleware(
    State(state): State<McpHttpState>,
    req: Request<Body>,
    next: Next,
  ) -> Result<Response, StatusCode> {
    // Health endpoint is public
    if req.uri().path() == "/health" {
      return Ok(next.run(req).await);
    }

    let auth_header = req
      .headers()
      .get(header::AUTHORIZATION)
      .and_then(|h| h.to_str().ok());

    let token = auth_header.and_then(|h| h.strip_prefix("Bearer "));

    if token != Some(&state.token) {
      return Err(StatusCode::UNAUTHORIZED);
    }

    Ok(next.run(req).await)
  }

  async fn handle_health() -> impl IntoResponse {
    Json(serde_json::json!({
      "status": "ok",
      "server": SERVER_NAME,
      "version": SERVER_VERSION,
      "protocolVersion": PROTOCOL_VERSION,
    }))
  }

  async fn handle_mcp_get() -> impl IntoResponse {
    // We don't support server-initiated SSE streams
    StatusCode::METHOD_NOT_ALLOWED
  }

  async fn handle_mcp_delete(
    State(state): State<McpHttpState>,
    req: Request<Body>,
  ) -> impl IntoResponse {
    let session_id = req
      .headers()
      .get("mcp-session-id")
      .and_then(|h| h.to_str().ok())
      .map(|s| s.to_string());

    if let Some(sid) = session_id {
      let mut inner = state.server.inner.lock().await;
      inner.sessions.remove(&sid);
      log::info!("[mcp] Session terminated: {}", sid);
    }

    StatusCode::OK
  }

  async fn handle_mcp_post(State(state): State<McpHttpState>, req: Request<Body>) -> Response {
    let session_id = req
      .headers()
      .get("mcp-session-id")
      .and_then(|h| h.to_str().ok())
      .map(|s| s.to_string());

    let body_bytes = match axum::body::to_bytes(req.into_body(), 1024 * 1024).await {
      Ok(b) => b,
      Err(_) => {
        return (StatusCode::BAD_REQUEST, "Invalid request body").into_response();
      }
    };

    let request: McpRequest = match serde_json::from_slice(&body_bytes) {
      Ok(r) => r,
      Err(_) => {
        return (StatusCode::BAD_REQUEST, "Invalid JSON").into_response();
      }
    };

    let is_notification = request.id.is_none();
    let method = request.method.clone();

    // Handle initialize (no session required)
    if method == "initialize" {
      let response = state.server.handle_initialize(request).await;
      match response {
        Ok((session_id, result)) => {
          let body = McpResponse {
            jsonrpc: "2.0".to_string(),
            id: Some(result.0),
            result: Some(result.1),
            error: None,
          };
          Response::builder()
            .status(StatusCode::OK)
            .header(header::CONTENT_TYPE, "application/json")
            .header("mcp-session-id", &session_id)
            .body(Body::from(serde_json::to_vec(&body).unwrap()))
            .unwrap()
        }
        Err((id, error)) => {
          let body = McpResponse {
            jsonrpc: "2.0".to_string(),
            id: Some(id),
            result: None,
            error: Some(error),
          };
          Json(body).into_response()
        }
      }
    } else if is_notification {
      // Notifications (like notifications/initialized) -> 202 Accepted
      if method == "notifications/initialized" {
        if let Some(sid) = &session_id {
          let mut inner = state.server.inner.lock().await;
          if let Some(session) = inner.sessions.get_mut(sid) {
            session.initialized = true;
          }
        }
      }
      StatusCode::ACCEPTED.into_response()
    } else {
      // Validate session exists
      if let Some(sid) = &session_id {
        let inner = state.server.inner.lock().await;
        if !inner.sessions.contains_key(sid) {
          return StatusCode::NOT_FOUND.into_response();
        }
      }

      let response = state.server.handle_request(request).await;
      Json(response).into_response()
    }
  }

  pub async fn stop(&self) -> Result<(), String> {
    if !self.is_running() {
      return Err("MCP server is not running".to_string());
    }

    let mut inner = self.inner.lock().await;
    inner.app_handle = None;
    inner.token = None;
    inner.sessions.clear();

    // Send shutdown signal
    if let Some(tx) = inner.shutdown_tx.take() {
      let _ = tx.send(());
    }

    self.port.store(0, Ordering::SeqCst);
    self.is_running.store(false, Ordering::SeqCst);

    log::info!("[mcp] Server stopped");
    Ok(())
  }

  pub fn get_tools(&self) -> Vec<McpTool> {
    vec![
      McpTool {
        name: "list_profiles".to_string(),
        description: "List all Wayfern and Camoufox browser profiles".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "get_profile".to_string(),
        description: "Get details of a specific browser profile".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to retrieve"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "run_profile".to_string(),
        description: "Launch a browser profile with an optional URL".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to launch"
            },
            "url": {
              "type": "string",
              "description": "Optional URL to open in the browser"
            },
            "headless": {
              "type": "boolean",
              "description": "Run the browser in headless mode"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "kill_profile".to_string(),
        description: "Stop a running browser profile".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to stop"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "create_profile".to_string(),
        description: "Create a new browser profile".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "name": {
              "type": "string",
              "description": "Name for the new profile"
            },
            "browser": {
              "type": "string",
              "enum": ["wayfern", "camoufox"],
              "description": "Browser engine to use"
            },
            "proxy_id": {
              "type": "string",
              "description": "Optional proxy UUID to assign"
            },
            "group_id": {
              "type": "string",
              "description": "Optional group UUID to assign"
            },
            "tags": {
              "type": "array",
              "items": { "type": "string" },
              "description": "Optional tags for the profile"
            }
          },
          "required": ["name", "browser"]
        }),
      },
      McpTool {
        name: "update_profile".to_string(),
        description: "Update an existing browser profile's settings".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to update"
            },
            "name": {
              "type": "string",
              "description": "New name for the profile"
            },
            "proxy_id": {
              "type": "string",
              "description": "Proxy UUID to assign (empty string to remove)"
            },
            "group_id": {
              "type": "string",
              "description": "Group UUID to assign (empty string to remove)"
            },
            "tags": {
              "type": "array",
              "items": { "type": "string" },
              "description": "Tags for the profile (replaces existing tags)"
            },
            "extension_group_id": {
              "type": "string",
              "description": "Extension group UUID to assign (empty string to remove)"
            },
            "proxy_bypass_rules": {
              "type": "array",
              "items": { "type": "string" },
              "description": "Proxy bypass rules (replaces existing rules)"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "delete_profile".to_string(),
        description: "Delete a browser profile and all its data".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to delete"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "list_tags".to_string(),
        description: "List all tags used across profiles".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "list_proxies".to_string(),
        description: "List all configured proxies".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "get_profile_status".to_string(),
        description: "Check if a browser profile is currently running".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to check"
            }
          },
          "required": ["profile_id"]
        }),
      },
      // Group management tools
      McpTool {
        name: "list_groups".to_string(),
        description: "List all profile groups".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "get_group".to_string(),
        description: "Get details of a specific group".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "group_id": {
              "type": "string",
              "description": "The UUID of the group to retrieve"
            }
          },
          "required": ["group_id"]
        }),
      },
      McpTool {
        name: "create_group".to_string(),
        description: "Create a new profile group".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "name": {
              "type": "string",
              "description": "The name for the new group"
            }
          },
          "required": ["name"]
        }),
      },
      McpTool {
        name: "update_group".to_string(),
        description: "Update an existing group's name".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "group_id": {
              "type": "string",
              "description": "The UUID of the group to update"
            },
            "name": {
              "type": "string",
              "description": "The new name for the group"
            }
          },
          "required": ["group_id", "name"]
        }),
      },
      McpTool {
        name: "delete_group".to_string(),
        description: "Delete a profile group".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "group_id": {
              "type": "string",
              "description": "The UUID of the group to delete"
            }
          },
          "required": ["group_id"]
        }),
      },
      McpTool {
        name: "assign_profiles_to_group".to_string(),
        description: "Assign one or more profiles to a group".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_ids": {
              "type": "array",
              "items": { "type": "string" },
              "description": "Array of profile UUIDs to assign"
            },
            "group_id": {
              "type": "string",
              "description": "The UUID of the group to assign to (null to remove from group)"
            }
          },
          "required": ["profile_ids"]
        }),
      },
      // Full proxy management tools
      McpTool {
        name: "get_proxy".to_string(),
        description: "Get details of a specific proxy".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "proxy_id": {
              "type": "string",
              "description": "The UUID of the proxy to retrieve"
            }
          },
          "required": ["proxy_id"]
        }),
      },
      McpTool {
        name: "create_proxy".to_string(),
        description: "Create a new proxy configuration. For regular proxies, provide proxy_type/host/port. For dynamic proxies, provide dynamic_proxy_url and dynamic_proxy_format instead.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "name": {
              "type": "string",
              "description": "The name for the new proxy"
            },
            "proxy_type": {
              "type": "string",
              "enum": ["http", "https", "socks4", "socks5"],
              "description": "The type of proxy (for regular proxies)"
            },
            "host": {
              "type": "string",
              "description": "The proxy host address (for regular proxies)"
            },
            "port": {
              "type": "integer",
              "description": "The proxy port number (for regular proxies)"
            },
            "username": {
              "type": "string",
              "description": "Optional username for authentication (for regular proxies)"
            },
            "password": {
              "type": "string",
              "description": "Optional password for authentication (for regular proxies)"
            },
            "dynamic_proxy_url": {
              "type": "string",
              "description": "URL to fetch proxy settings from (for dynamic proxies)"
            },
            "dynamic_proxy_format": {
              "type": "string",
              "enum": ["json", "text"],
              "description": "Format of the dynamic proxy response: 'json' for JSON object or 'text' for text like host:port:user:pass (for dynamic proxies)"
            }
          },
          "required": ["name"]
        }),
      },
      McpTool {
        name: "update_proxy".to_string(),
        description: "Update an existing proxy configuration".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "proxy_id": {
              "type": "string",
              "description": "The UUID of the proxy to update"
            },
            "name": {
              "type": "string",
              "description": "New name for the proxy"
            },
            "proxy_type": {
              "type": "string",
              "enum": ["http", "https", "socks4", "socks5"],
              "description": "The type of proxy (for regular proxies)"
            },
            "host": {
              "type": "string",
              "description": "The proxy host address (for regular proxies)"
            },
            "port": {
              "type": "integer",
              "description": "The proxy port number (for regular proxies)"
            },
            "username": {
              "type": "string",
              "description": "Optional username for authentication (for regular proxies)"
            },
            "password": {
              "type": "string",
              "description": "Optional password for authentication (for regular proxies)"
            },
            "dynamic_proxy_url": {
              "type": "string",
              "description": "URL to fetch proxy settings from (for dynamic proxies)"
            },
            "dynamic_proxy_format": {
              "type": "string",
              "enum": ["json", "text"],
              "description": "Format of the dynamic proxy response (for dynamic proxies)"
            }
          },
          "required": ["proxy_id"]
        }),
      },
      McpTool {
        name: "delete_proxy".to_string(),
        description: "Delete a proxy configuration".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "proxy_id": {
              "type": "string",
              "description": "The UUID of the proxy to delete"
            }
          },
          "required": ["proxy_id"]
        }),
      },
      McpTool {
        name: "export_proxies".to_string(),
        description: "Export all proxy configurations".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "format": {
              "type": "string",
              "enum": ["json", "txt"],
              "description": "Export format (json for structured data, txt for URL format)"
            }
          },
          "required": ["format"]
        }),
      },
      McpTool {
        name: "import_proxies".to_string(),
        description: "Import proxy configurations from JSON or TXT content".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "content": {
              "type": "string",
              "description": "The proxy configuration content to import"
            },
            "format": {
              "type": "string",
              "enum": ["json", "txt"],
              "description": "Import format (json or txt)"
            },
            "name_prefix": {
              "type": "string",
              "description": "Optional prefix for imported proxy names (default: 'Imported')"
            }
          },
          "required": ["content", "format"]
        }),
      },
      // VPN management tools
      McpTool {
        name: "import_vpn".to_string(),
        description: "Import a WireGuard (.conf) or OpenVPN (.ovpn) configuration".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "content": {
              "type": "string",
              "description": "Raw VPN config file content"
            },
            "filename": {
              "type": "string",
              "description": "Original filename (.conf or .ovpn) for type detection"
            },
            "name": {
              "type": "string",
              "description": "Optional display name for the VPN config"
            }
          },
          "required": ["content", "filename"]
        }),
      },
      McpTool {
        name: "list_vpn_configs".to_string(),
        description: "List all stored VPN configurations".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "delete_vpn".to_string(),
        description: "Delete a VPN configuration".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "vpn_id": {
              "type": "string",
              "description": "The UUID of the VPN config to delete"
            }
          },
          "required": ["vpn_id"]
        }),
      },
      McpTool {
        name: "connect_vpn".to_string(),
        description: "Connect to a VPN configuration".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "vpn_id": {
              "type": "string",
              "description": "The UUID of the VPN config to connect"
            }
          },
          "required": ["vpn_id"]
        }),
      },
      McpTool {
        name: "disconnect_vpn".to_string(),
        description: "Disconnect from a VPN".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "vpn_id": {
              "type": "string",
              "description": "The UUID of the VPN to disconnect"
            }
          },
          "required": ["vpn_id"]
        }),
      },
      McpTool {
        name: "get_vpn_status".to_string(),
        description: "Get the connection status of a VPN".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "vpn_id": {
              "type": "string",
              "description": "The UUID of the VPN to check"
            }
          },
          "required": ["vpn_id"]
        }),
      },
      // Fingerprint management tools
      McpTool {
        name: "get_profile_fingerprint".to_string(),
        description: "Get the fingerprint configuration for a Wayfern or Camoufox profile"
          .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "update_profile_fingerprint".to_string(),
        description:
          "Update the fingerprint configuration for a Wayfern or Camoufox profile. Requires an active Pro subscription."
            .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to update"
            },
            "fingerprint": {
              "type": "string",
              "description": "JSON string of the fingerprint configuration, or null to clear"
            },
            "os": {
              "type": "string",
              "enum": ["windows", "macos", "linux"],
              "description": "Operating system for fingerprint generation"
            },
            "randomize_fingerprint_on_launch": {
              "type": "boolean",
              "description": "Whether to generate a new fingerprint on every launch"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "update_profile_proxy_bypass_rules".to_string(),
        description:
          "Update proxy bypass rules for a profile. Requests matching these rules will connect directly, bypassing the proxy."
            .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to update"
            },
            "rules": {
              "type": "array",
              "items": { "type": "string" },
              "description": "Array of bypass rules. Supports hostnames (e.g. 'example.com'), IP addresses, and regex patterns."
            }
          },
          "required": ["profile_id", "rules"]
        }),
      },
      McpTool {
        name: "list_extensions".to_string(),
        description: "List all managed browser extensions. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "list_extension_groups".to_string(),
        description: "List all extension groups. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "create_extension_group".to_string(),
        description: "Create a new extension group. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "name": { "type": "string", "description": "Name for the extension group" }
          },
          "required": ["name"]
        }),
      },
      McpTool {
        name: "delete_extension".to_string(),
        description: "Delete a managed extension. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "extension_id": { "type": "string", "description": "The extension ID to delete" }
          },
          "required": ["extension_id"]
        }),
      },
      McpTool {
        name: "delete_extension_group".to_string(),
        description: "Delete an extension group. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "group_id": { "type": "string", "description": "The extension group ID to delete" }
          },
          "required": ["group_id"]
        }),
      },
      McpTool {
        name: "assign_extension_group_to_profile".to_string(),
        description: "Assign an extension group to a profile, or remove the assignment. Requires Pro subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": { "type": "string", "description": "The profile ID" },
            "extension_group_id": { "type": "string", "description": "The extension group ID, or empty string to remove" }
          },
          "required": ["profile_id"]
        }),
      },
      // Team lock tools
      McpTool {
        name: "get_team_locks".to_string(),
        description: "List all active team profile locks. Requires team plan.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {},
          "required": []
        }),
      },
      McpTool {
        name: "get_team_lock_status".to_string(),
        description: "Check if a profile is locked by a team member. Requires team plan.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the profile to check"
            }
          },
          "required": ["profile_id"]
        }),
      },
      // Synchronizer tools
      McpTool {
        name: "start_sync_session".to_string(),
        description: "Start a synchronizer session. Launches a leader profile and follower profiles, then mirrors all actions from the leader to the followers in real time. Only Wayfern profiles are supported. Requires paid subscription.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "leader_profile_id": {
              "type": "string",
              "description": "The UUID of the leader profile"
            },
            "follower_profile_ids": {
              "type": "array",
              "items": { "type": "string" },
              "description": "UUIDs of follower profiles"
            }
          },
          "required": ["leader_profile_id", "follower_profile_ids"]
        }),
      },
      McpTool {
        name: "stop_sync_session".to_string(),
        description: "Stop an active synchronizer session. Kills all follower profiles and the leader.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "description": "The sync session ID"
            }
          },
          "required": ["session_id"]
        }),
      },
      McpTool {
        name: "get_sync_sessions".to_string(),
        description: "List all active synchronizer sessions.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {}
        }),
      },
      McpTool {
        name: "remove_sync_follower".to_string(),
        description: "Remove a follower from an active synchronizer session.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "session_id": {
              "type": "string",
              "description": "The sync session ID"
            },
            "follower_profile_id": {
              "type": "string",
              "description": "The UUID of the follower to remove"
            }
          },
          "required": ["session_id", "follower_profile_id"]
        }),
      },
      // Browser interaction tools
      McpTool {
        name: "navigate".to_string(),
        description: "Navigate a running browser profile to a URL. Waits for the page to fully load before returning.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "url": {
              "type": "string",
              "description": "The URL to navigate to"
            }
          },
          "required": ["profile_id", "url"]
        }),
      },
      McpTool {
        name: "screenshot".to_string(),
        description: "Take a screenshot of the current page in a running browser profile. Returns base64-encoded image."
          .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "format": {
              "type": "string",
              "enum": ["png", "jpeg", "webp"],
              "description": "Image format (default: png)"
            },
            "quality": {
              "type": "integer",
              "description": "Image quality 0-100 for jpeg/webp (default: 80)"
            },
            "full_page": {
              "type": "boolean",
              "description": "Capture the full scrollable page (default: false)"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "evaluate_javascript".to_string(),
        description:
          "Execute JavaScript in the context of the current page and return the result. Works with both static and dynamically-generated content. Set wait_for_load=true if the script triggers navigation (e.g., form.submit())."
            .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "expression": {
              "type": "string",
              "description": "JavaScript expression to evaluate"
            },
            "await_promise": {
              "type": "boolean",
              "description": "Whether to await the result if it's a Promise (default: false)"
            },
            "wait_for_load": {
              "type": "boolean",
              "description": "Wait for page load after execution, use when the script triggers navigation like form.submit() (default: false)"
            }
          },
          "required": ["profile_id", "expression"]
        }),
      },
      McpTool {
        name: "click_element".to_string(),
        description: "Click on an element identified by a CSS selector. If the click triggers a page navigation, waits for the new page to load before returning.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "selector": {
              "type": "string",
              "description": "CSS selector for the element to click"
            }
          },
          "required": ["profile_id", "selector"]
        }),
      },
      McpTool {
        name: "type_text".to_string(),
        description: "Focus an element by CSS selector and type text into it. By default uses realistic human-like typing with variable speed, natural errors, and self-corrections. Only set instant=true when you are certain the target does not have bot detection (e.g. browser address bars, developer tools, internal apps) — using instant on public websites risks the profile being flagged as a bot.".to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "selector": {
              "type": "string",
              "description": "CSS selector for the input element"
            },
            "text": {
              "type": "string",
              "description": "Text to type into the element"
            },
            "clear_first": {
              "type": "boolean",
              "description": "Clear the input before typing (default: true)"
            },
            "instant": {
              "type": "boolean",
              "description": "Paste all text at once instead of human typing. WARNING: only use on targets without bot detection — using this on public websites risks the profile being flagged."
            },
            "wpm": {
              "type": "number",
              "description": "Target words per minute for human typing (default: 80)"
            }
          },
          "required": ["profile_id", "selector", "text"]
        }),
      },
      McpTool {
        name: "get_page_content".to_string(),
        description:
          "Get the content of the current page. Works with both static HTML and JavaScript-rendered content."
            .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            },
            "format": {
              "type": "string",
              "enum": ["html", "text"],
              "description": "Content format: 'html' for full HTML, 'text' for visible text only (default: text)"
            },
            "selector": {
              "type": "string",
              "description": "Optional CSS selector to get content of a specific element instead of the whole page"
            }
          },
          "required": ["profile_id"]
        }),
      },
      McpTool {
        name: "get_page_info".to_string(),
        description: "Get metadata about the current page including URL, title, and readiness state"
          .to_string(),
        input_schema: serde_json::json!({
          "type": "object",
          "properties": {
            "profile_id": {
              "type": "string",
              "description": "The UUID of the running profile"
            }
          },
          "required": ["profile_id"]
        }),
      },
    ]
  }

  async fn handle_initialize(
    &self,
    request: McpRequest,
  ) -> Result<(String, (serde_json::Value, serde_json::Value)), (serde_json::Value, McpError)> {
    let id = request.id.clone().unwrap_or(serde_json::Value::Null);

    if !self.is_running() {
      return Err((
        id,
        McpError {
          code: -32001,
          message: "MCP server is not running".to_string(),
        },
      ));
    }

    // Create session
    let session_id = Uuid::new_v4().to_string();
    {
      let mut inner = self.inner.lock().await;
      inner
        .sessions
        .insert(session_id.clone(), McpSession { initialized: false });
    }

    let result = serde_json::json!({
      "protocolVersion": PROTOCOL_VERSION,
      "capabilities": {
        "tools": {
          "listChanged": false
        }
      },
      "serverInfo": {
        "name": SERVER_NAME,
        "version": SERVER_VERSION,
      },
      "instructions": "Donut Browser MCP server. Use tools/list to discover available browser automation tools."
    });

    log::info!("[mcp] New session initialized: {}", session_id);
    Ok((session_id, (id, result)))
  }

  pub async fn handle_request(&self, request: McpRequest) -> McpResponse {
    let id = request.id.clone().unwrap_or(serde_json::Value::Null);

    if !self.is_running() {
      return McpResponse {
        jsonrpc: "2.0".to_string(),
        id: Some(id),
        result: None,
        error: Some(McpError {
          code: -32001,
          message: "MCP server is not running".to_string(),
        }),
      };
    }

    let result = match request.method.as_str() {
      "ping" => Ok(serde_json::json!({})),
      "tools/list" => self.handle_tools_list().await,
      "tools/call" => self.handle_tool_call(request.params).await,
      _ => Err(McpError {
        code: -32601,
        message: format!("Method not found: {}", request.method),
      }),
    };

    match result {
      Ok(value) => McpResponse {
        jsonrpc: "2.0".to_string(),
        id: Some(id),
        result: Some(value),
        error: None,
      },
      Err(error) => McpResponse {
        jsonrpc: "2.0".to_string(),
        id: Some(id),
        result: None,
        error: Some(error),
      },
    }
  }

  async fn handle_tools_list(&self) -> Result<serde_json::Value, McpError> {
    Ok(serde_json::json!({
      "tools": self.get_tools()
    }))
  }

  async fn handle_tool_call(
    &self,
    params: Option<serde_json::Value>,
  ) -> Result<serde_json::Value, McpError> {
    let params = params.ok_or_else(|| McpError {
      code: -32602,
      message: "Missing parameters".to_string(),
    })?;

    let tool_name = params
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing tool name".to_string(),
      })?;

    let arguments = params
      .get("arguments")
      .cloned()
      .unwrap_or(serde_json::json!({}));

    match tool_name {
      "list_profiles" => self.handle_list_profiles().await,
      "get_profile" => self.handle_get_profile(&arguments).await,
      "run_profile" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_run_profile(&arguments).await
      }
      "kill_profile" => self.handle_kill_profile(&arguments).await,
      "create_profile" => self.handle_create_profile(&arguments).await,
      "update_profile" => self.handle_update_profile(&arguments).await,
      "delete_profile" => self.handle_delete_profile(&arguments).await,
      "list_tags" => self.handle_list_tags().await,
      "list_proxies" => self.handle_list_proxies().await,
      "get_profile_status" => self.handle_get_profile_status(&arguments).await,
      // Group management
      "list_groups" => self.handle_list_groups().await,
      "get_group" => self.handle_get_group(&arguments).await,
      "create_group" => self.handle_create_group(&arguments).await,
      "update_group" => self.handle_update_group(&arguments).await,
      "delete_group" => self.handle_delete_group(&arguments).await,
      "assign_profiles_to_group" => self.handle_assign_profiles_to_group(&arguments).await,
      // Full proxy management
      "get_proxy" => self.handle_get_proxy(&arguments).await,
      "create_proxy" => self.handle_create_proxy(&arguments).await,
      "update_proxy" => self.handle_update_proxy(&arguments).await,
      "delete_proxy" => self.handle_delete_proxy(&arguments).await,
      // Proxy import/export
      "export_proxies" => self.handle_export_proxies(&arguments).await,
      "import_proxies" => self.handle_import_proxies(&arguments).await,
      // VPN management
      "import_vpn" => self.handle_import_vpn(&arguments).await,
      "list_vpn_configs" => self.handle_list_vpn_configs().await,
      "delete_vpn" => self.handle_delete_vpn(&arguments).await,
      "connect_vpn" => self.handle_connect_vpn(&arguments).await,
      "disconnect_vpn" => self.handle_disconnect_vpn(&arguments).await,
      "get_vpn_status" => self.handle_get_vpn_status(&arguments).await,
      // Fingerprint management
      "get_profile_fingerprint" => self.handle_get_profile_fingerprint(&arguments).await,
      "update_profile_fingerprint" => self.handle_update_profile_fingerprint(&arguments).await,
      "update_profile_proxy_bypass_rules" => {
        self
          .handle_update_profile_proxy_bypass_rules(&arguments)
          .await
      }
      // Extension management
      "list_extensions" => self.handle_list_extensions().await,
      "list_extension_groups" => self.handle_list_extension_groups().await,
      "create_extension_group" => self.handle_create_extension_group(&arguments).await,
      "delete_extension" => self.handle_delete_extension_mcp(&arguments).await,
      "delete_extension_group" => self.handle_delete_extension_group_mcp(&arguments).await,
      "assign_extension_group_to_profile" => {
        self
          .handle_assign_extension_group_to_profile(&arguments)
          .await
      }
      // Team lock tools
      "get_team_locks" => self.handle_get_team_locks().await,
      "get_team_lock_status" => self.handle_get_team_lock_status(&arguments).await,
      // Synchronizer tools
      "start_sync_session" => {
        Self::require_paid_subscription("Synchronizer").await?;
        self.handle_start_sync_session(&arguments).await
      }
      "stop_sync_session" => self.handle_stop_sync_session(&arguments).await,
      "get_sync_sessions" => self.handle_get_sync_sessions().await,
      "remove_sync_follower" => self.handle_remove_sync_follower(&arguments).await,
      // Browser interaction tools (require paid subscription)
      "navigate" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_navigate(&arguments).await
      }
      "screenshot" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_screenshot(&arguments).await
      }
      "evaluate_javascript" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_evaluate_javascript(&arguments).await
      }
      "click_element" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_click_element(&arguments).await
      }
      "type_text" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_type_text(&arguments).await
      }
      "get_page_content" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_get_page_content(&arguments).await
      }
      "get_page_info" => {
        Self::require_paid_subscription("Browser automation").await?;
        self.handle_get_page_info(&arguments).await
      }
      _ => Err(McpError {
        code: -32602,
        message: format!("Unknown tool: {tool_name}"),
      }),
    }
  }

  async fn handle_list_profiles(&self) -> Result<serde_json::Value, McpError> {
    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    // Filter to only Wayfern and Camoufox profiles
    let filtered: Vec<&BrowserProfile> = profiles
      .iter()
      .filter(|p| p.browser == "wayfern" || p.browser == "camoufox")
      .collect();

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&filtered).unwrap_or_default()
      }]
    }))
  }

  async fn handle_get_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    // Check if it's a Wayfern or Camoufox profile
    if profile.browser != "wayfern" && profile.browser != "camoufox" {
      return Err(McpError {
        code: -32000,
        message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
      });
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&profile).unwrap_or_default()
      }]
    }))
  }

  async fn handle_run_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let url = arguments.get("url").and_then(|v| v.as_str());
    let _headless = arguments
      .get("headless")
      .and_then(|v| v.as_bool())
      .unwrap_or(false);

    // Get the profile
    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    // Check if it's a Wayfern or Camoufox profile
    if profile.browser != "wayfern" && profile.browser != "camoufox" {
      return Err(McpError {
        code: -32000,
        message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
      });
    }

    // Team lock check
    crate::team_lock::acquire_team_lock_if_needed(profile)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: e,
      })?;

    // Get app handle to launch
    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    // Launch the browser
    crate::browser_runner::BrowserRunner::instance()
      .launch_browser(
        app_handle.clone(),
        profile,
        url.map(|s| s.to_string()),
        None,
      )
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to launch browser: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Browser profile '{}' launched successfully", profile.name)
      }]
    }))
  }

  async fn handle_kill_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    // Get the profile
    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    // Check if it's a Wayfern or Camoufox profile
    if profile.browser != "wayfern" && profile.browser != "camoufox" {
      return Err(McpError {
        code: -32000,
        message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
      });
    }

    // Get app handle to kill
    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    // Kill the browser
    crate::browser_runner::BrowserRunner::instance()
      .kill_browser_process(app_handle.clone(), profile)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to kill browser: {e}"),
      })?;

    crate::team_lock::release_team_lock_if_needed(profile).await;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Browser profile '{}' stopped successfully", profile.name)
      }]
    }))
  }

  async fn handle_create_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing name".to_string(),
      })?;
    let browser = arguments
      .get("browser")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing browser".to_string(),
      })?;

    if browser != "wayfern" && browser != "camoufox" {
      return Err(McpError {
        code: -32602,
        message: "browser must be 'wayfern' or 'camoufox'".to_string(),
      });
    }

    let proxy_id = arguments
      .get("proxy_id")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());
    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());
    let tags: Option<Vec<String>> = arguments.get("tags").and_then(|v| {
      v.as_array().map(|arr| {
        arr
          .iter()
          .filter_map(|item| item.as_str().map(|s| s.to_string()))
          .collect()
      })
    });

    // Pick the latest downloaded version for this browser
    let registry = crate::downloaded_browsers_registry::DownloadedBrowsersRegistry::instance();
    let versions = registry.get_downloaded_versions(browser);
    let version = versions.first().ok_or_else(|| McpError {
      code: -32000,
      message: format!("No downloaded version found for {browser}. Download it first."),
    })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    let mut profile = ProfileManager::instance()
      .create_profile_with_group(
        app_handle, name, browser, version, "stable", proxy_id, None, None, None, group_id, false,
      )
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to create profile: {e}"),
      })?;

    if let Some(tags) = tags {
      let _ =
        ProfileManager::instance().update_profile_tags(app_handle, &profile.name, tags.clone());
      profile.tags = tags;
      if let Ok(profiles) = ProfileManager::instance().list_profiles() {
        let _ = crate::tag_manager::TAG_MANAGER
          .lock()
          .map(|manager| manager.rebuild_from_profiles(&profiles));
      }
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Profile '{}' created (id: {})", profile.name, profile.id)
      }]
    }))
  }

  async fn handle_update_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;
    let pm = ProfileManager::instance();

    if let Some(new_name) = arguments.get("name").and_then(|v| v.as_str()) {
      pm.rename_profile(app_handle, profile_id, new_name)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to rename profile: {e}"),
        })?;
    }

    if let Some(proxy_id) = arguments.get("proxy_id").and_then(|v| v.as_str()) {
      let pid = if proxy_id.is_empty() {
        None
      } else {
        Some(proxy_id.to_string())
      };
      pm.update_profile_proxy(app_handle.clone(), profile_id, pid)
        .await
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update proxy: {e}"),
        })?;
    }

    if let Some(group_id) = arguments.get("group_id").and_then(|v| v.as_str()) {
      let gid = if group_id.is_empty() {
        None
      } else {
        Some(group_id.to_string())
      };
      pm.assign_profiles_to_group(app_handle, vec![profile_id.to_string()], gid)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update group: {e}"),
        })?;
    }

    if let Some(tags) = arguments.get("tags").and_then(|v| v.as_array()) {
      let tag_list: Vec<String> = tags
        .iter()
        .filter_map(|item| item.as_str().map(|s| s.to_string()))
        .collect();
      pm.update_profile_tags(app_handle, profile_id, tag_list)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update tags: {e}"),
        })?;
      if let Ok(profiles) = pm.list_profiles() {
        let _ = crate::tag_manager::TAG_MANAGER
          .lock()
          .map(|manager| manager.rebuild_from_profiles(&profiles));
      }
    }

    if let Some(ext_group_id) = arguments.get("extension_group_id").and_then(|v| v.as_str()) {
      let eid = if ext_group_id.is_empty() {
        None
      } else {
        Some(ext_group_id.to_string())
      };
      pm.update_profile_extension_group(profile_id, eid)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update extension group: {e}"),
        })?;
    }

    if let Some(rules) = arguments
      .get("proxy_bypass_rules")
      .and_then(|v| v.as_array())
    {
      let rule_list: Vec<String> = rules
        .iter()
        .filter_map(|item| item.as_str().map(|s| s.to_string()))
        .collect();
      pm.update_profile_proxy_bypass_rules(app_handle, profile_id, rule_list)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update proxy bypass rules: {e}"),
        })?;
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Profile '{profile_id}' updated successfully")
      }]
    }))
  }

  async fn handle_delete_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    ProfileManager::instance()
      .delete_profile(app_handle, profile_id)
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to delete profile: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Profile '{profile_id}' deleted successfully")
      }]
    }))
  }

  async fn handle_list_tags(&self) -> Result<serde_json::Value, McpError> {
    let tags = crate::tag_manager::TAG_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to access tag manager: {e}"),
      })?
      .get_all_tags()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to get tags: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&tags).unwrap_or_default()
      }]
    }))
  }

  async fn handle_list_proxies(&self) -> Result<serde_json::Value, McpError> {
    let proxies = PROXY_MANAGER.get_stored_proxies();

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&proxies).unwrap_or_default()
      }]
    }))
  }

  async fn handle_get_profile_status(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    // Get the profile
    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    // Check if it's a Wayfern or Camoufox profile
    if profile.browser != "wayfern" && profile.browser != "camoufox" {
      return Err(McpError {
        code: -32000,
        message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
      });
    }

    let is_running = profile.process_id.is_some();

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::json!({
          "profile_id": profile_id,
          "is_running": is_running
        }).to_string()
      }]
    }))
  }

  // Group management handlers
  async fn handle_list_groups(&self) -> Result<serde_json::Value, McpError> {
    let groups = GROUP_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock group manager: {e}"),
      })?
      .get_all_groups()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list groups: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&groups).unwrap_or_default()
      }]
    }))
  }

  async fn handle_get_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing group_id".to_string(),
      })?;

    let groups = GROUP_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock group manager: {e}"),
      })?
      .get_all_groups()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list groups: {e}"),
      })?;

    let group = groups
      .iter()
      .find(|g| g.id == group_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Group not found: {group_id}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&group).unwrap_or_default()
      }]
    }))
  }

  async fn handle_create_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing name".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    let group = GROUP_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock group manager: {e}"),
      })?
      .create_group(app_handle, name.to_string())
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to create group: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Group '{}' created successfully with ID: {}", group.name, group.id)
      }]
    }))
  }

  async fn handle_update_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing group_id".to_string(),
      })?;

    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing name".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    let group = GROUP_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock group manager: {e}"),
      })?
      .update_group(app_handle, group_id.to_string(), name.to_string())
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to update group: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Group '{}' updated successfully", group.name)
      }]
    }))
  }

  async fn handle_delete_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing group_id".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    GROUP_MANAGER
      .lock()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock group manager: {e}"),
      })?
      .delete_group(app_handle, group_id.to_string())
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to delete group: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Group '{}' deleted successfully", group_id)
      }]
    }))
  }

  async fn handle_assign_profiles_to_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_ids: Vec<String> = arguments
      .get("profile_ids")
      .and_then(|v| v.as_array())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_ids".to_string(),
      })?
      .iter()
      .filter_map(|v| v.as_str().map(|s| s.to_string()))
      .collect();

    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    ProfileManager::instance()
      .assign_profiles_to_group(app_handle, profile_ids.clone(), group_id.clone())
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to assign profiles to group: {e}"),
      })?;

    let group_name = group_id.as_deref().unwrap_or("default");
    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("{} profile(s) assigned to group '{}'", profile_ids.len(), group_name)
      }]
    }))
  }

  // Full proxy management handlers
  async fn handle_get_proxy(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let proxy_id = arguments
      .get("proxy_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing proxy_id".to_string(),
      })?;

    let proxies = PROXY_MANAGER.get_stored_proxies();
    let proxy = proxies
      .iter()
      .find(|p| p.id == proxy_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Proxy not found: {proxy_id}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&proxy).unwrap_or_default()
      }]
    }))
  }

  async fn handle_create_proxy(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing name".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    // Check if this is a dynamic proxy creation
    let dynamic_url = arguments.get("dynamic_proxy_url").and_then(|v| v.as_str());
    let dynamic_format = arguments
      .get("dynamic_proxy_format")
      .and_then(|v| v.as_str());

    let proxy = if let (Some(url), Some(format)) = (dynamic_url, dynamic_format) {
      PROXY_MANAGER
        .create_dynamic_proxy(
          app_handle,
          name.to_string(),
          url.to_string(),
          format.to_string(),
        )
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to create dynamic proxy: {e}"),
        })?
    } else {
      let proxy_type = arguments
        .get("proxy_type")
        .and_then(|v| v.as_str())
        .ok_or_else(|| McpError {
          code: -32602,
          message: "Missing proxy_type (required for regular proxies)".to_string(),
        })?;

      let host = arguments
        .get("host")
        .and_then(|v| v.as_str())
        .ok_or_else(|| McpError {
          code: -32602,
          message: "Missing host (required for regular proxies)".to_string(),
        })?;

      let port = arguments
        .get("port")
        .and_then(|v| v.as_u64())
        .ok_or_else(|| McpError {
          code: -32602,
          message: "Missing port (required for regular proxies)".to_string(),
        })? as u16;

      let username = arguments
        .get("username")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());
      let password = arguments
        .get("password")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string());

      let proxy_settings = ProxySettings {
        proxy_type: proxy_type.to_string(),
        host: host.to_string(),
        port,
        username,
        password,
      };

      PROXY_MANAGER
        .create_stored_proxy(app_handle, name.to_string(), proxy_settings)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to create proxy: {e}"),
        })?
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Proxy '{}' created successfully with ID: {}", proxy.name, proxy.id)
      }]
    }))
  }

  async fn handle_update_proxy(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let proxy_id = arguments
      .get("proxy_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing proxy_id".to_string(),
      })?;

    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());

    // Build proxy_settings if any settings fields are provided
    let has_settings = arguments.get("proxy_type").is_some()
      || arguments.get("host").is_some()
      || arguments.get("port").is_some();

    let proxy_settings = if has_settings {
      // Get existing proxy to use as defaults
      let proxies = PROXY_MANAGER.get_stored_proxies();
      let existing = proxies
        .iter()
        .find(|p| p.id == proxy_id)
        .ok_or_else(|| McpError {
          code: -32000,
          message: format!("Proxy not found: {proxy_id}"),
        })?;

      let proxy_type = arguments
        .get("proxy_type")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string())
        .unwrap_or_else(|| existing.proxy_settings.proxy_type.clone());

      let host = arguments
        .get("host")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string())
        .unwrap_or_else(|| existing.proxy_settings.host.clone());

      let port = arguments
        .get("port")
        .and_then(|v| v.as_u64())
        .map(|p| p as u16)
        .unwrap_or(existing.proxy_settings.port);

      let username = arguments
        .get("username")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string())
        .or_else(|| existing.proxy_settings.username.clone());

      let password = arguments
        .get("password")
        .and_then(|v| v.as_str())
        .map(|s| s.to_string())
        .or_else(|| existing.proxy_settings.password.clone());

      Some(ProxySettings {
        proxy_type,
        host,
        port,
        username,
        password,
      })
    } else {
      None
    };

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    // Check for dynamic proxy fields
    let dynamic_url = arguments
      .get("dynamic_proxy_url")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());
    let dynamic_format = arguments
      .get("dynamic_proxy_format")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());
    let is_dynamic = PROXY_MANAGER.is_dynamic_proxy(proxy_id) || dynamic_url.is_some();

    let proxy = if is_dynamic {
      PROXY_MANAGER
        .update_dynamic_proxy(app_handle, proxy_id, name, dynamic_url, dynamic_format)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update dynamic proxy: {e}"),
        })?
    } else {
      PROXY_MANAGER
        .update_stored_proxy(app_handle, proxy_id, name, proxy_settings)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to update proxy: {e}"),
        })?
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Proxy '{}' updated successfully", proxy.name)
      }]
    }))
  }

  async fn handle_delete_proxy(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let proxy_id = arguments
      .get("proxy_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing proxy_id".to_string(),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    PROXY_MANAGER
      .delete_stored_proxy(app_handle, proxy_id)
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to delete proxy: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Proxy '{}' deleted successfully", proxy_id)
      }]
    }))
  }

  async fn handle_export_proxies(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let format = arguments
      .get("format")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing format".to_string(),
      })?;

    let content = match format {
      "json" => PROXY_MANAGER.export_proxies_json().map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to export proxies: {e}"),
      })?,
      "txt" => PROXY_MANAGER.export_proxies_txt(),
      _ => {
        return Err(McpError {
          code: -32602,
          message: format!("Invalid format '{}', must be 'json' or 'txt'", format),
        })
      }
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": content
      }]
    }))
  }

  async fn handle_import_proxies(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let content = arguments
      .get("content")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing content".to_string(),
      })?;

    let format = arguments
      .get("format")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing format".to_string(),
      })?;

    let name_prefix = arguments
      .get("name_prefix")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    let result = match format {
      "json" => PROXY_MANAGER
        .import_proxies_json(app_handle, content)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("Failed to import proxies: {e}"),
        })?,
      "txt" => {
        use crate::proxy_manager::{ProxyManager, ProxyParseResult};

        let parse_results = ProxyManager::parse_txt_proxies(content);
        let parsed: Vec<_> = parse_results
          .into_iter()
          .filter_map(|r| {
            if let ProxyParseResult::Parsed(p) = r {
              Some(p)
            } else {
              None
            }
          })
          .collect();

        if parsed.is_empty() {
          return Err(McpError {
            code: -32000,
            message: "No valid proxies found in content".to_string(),
          });
        }

        PROXY_MANAGER
          .import_proxies_from_parsed(app_handle, parsed, name_prefix)
          .map_err(|e| McpError {
            code: -32000,
            message: format!("Failed to import proxies: {e}"),
          })?
      }
      _ => {
        return Err(McpError {
          code: -32602,
          message: format!("Invalid format '{}', must be 'json' or 'txt'", format),
        })
      }
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!(
          "Import complete: {} imported, {} skipped, {} errors",
          result.imported_count,
          result.skipped_count,
          result.errors.len()
        )
      }]
    }))
  }

  // VPN management handlers
  async fn handle_import_vpn(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let content = arguments
      .get("content")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing content".to_string(),
      })?;

    let filename = arguments
      .get("filename")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing filename".to_string(),
      })?;

    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .map(|s| s.to_string());

    let storage = crate::vpn::VPN_STORAGE.lock().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to lock VPN storage: {e}"),
    })?;

    let config = storage
      .import_config(content, filename, name)
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to import VPN config: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!(
          "VPN '{}' ({}) imported successfully with ID: {}",
          config.name,
          config.vpn_type,
          config.id
        )
      }]
    }))
  }

  async fn handle_list_vpn_configs(&self) -> Result<serde_json::Value, McpError> {
    let storage = crate::vpn::VPN_STORAGE.lock().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to lock VPN storage: {e}"),
    })?;

    let configs = storage.list_configs().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to list VPN configs: {e}"),
    })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&configs).unwrap_or_default()
      }]
    }))
  }

  async fn handle_delete_vpn(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let vpn_id = arguments
      .get("vpn_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing vpn_id".to_string(),
      })?;

    // First disconnect if connected (stop VPN worker)
    let _ = crate::vpn_worker_runner::stop_vpn_worker_by_vpn_id(vpn_id).await;

    let storage = crate::vpn::VPN_STORAGE.lock().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to lock VPN storage: {e}"),
    })?;

    storage.delete_config(vpn_id).map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to delete VPN config: {e}"),
    })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("VPN '{}' deleted successfully", vpn_id)
      }]
    }))
  }

  async fn handle_connect_vpn(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let vpn_id = arguments
      .get("vpn_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing vpn_id".to_string(),
      })?;

    // Start VPN worker process
    crate::vpn_worker_runner::start_vpn_worker(vpn_id)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to connect VPN: {e}"),
      })?;

    // Update last_used timestamp
    {
      let storage = crate::vpn::VPN_STORAGE.lock().map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to lock VPN storage: {e}"),
      })?;
      let _ = storage.update_last_used(vpn_id);
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("VPN '{}' connected successfully", vpn_id)
      }]
    }))
  }

  async fn handle_disconnect_vpn(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let vpn_id = arguments
      .get("vpn_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing vpn_id".to_string(),
      })?;

    crate::vpn_worker_runner::stop_vpn_worker_by_vpn_id(vpn_id)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to disconnect VPN: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("VPN '{}' disconnected successfully", vpn_id)
      }]
    }))
  }

  async fn handle_get_vpn_status(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let vpn_id = arguments
      .get("vpn_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing vpn_id".to_string(),
      })?;

    let connected =
      if let Some(worker) = crate::vpn_worker_storage::find_vpn_worker_by_vpn_id(vpn_id) {
        worker
          .pid
          .map(crate::proxy_storage::is_process_running)
          .unwrap_or(false)
      } else {
        false
      };

    let status = crate::vpn::VpnStatus {
      connected,
      vpn_id: vpn_id.to_string(),
      connected_at: None,
      bytes_sent: None,
      bytes_received: None,
      last_handshake: None,
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&status).unwrap_or_default()
      }]
    }))
  }

  // Fingerprint management handlers
  async fn handle_get_profile_fingerprint(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    let fingerprint_info = match profile.browser.as_str() {
      "camoufox" => {
        let config = profile
          .camoufox_config
          .as_ref()
          .cloned()
          .unwrap_or_default();
        serde_json::json!({
          "browser": "camoufox",
          "fingerprint": config.fingerprint,
          "os": config.os,
          "randomize_fingerprint_on_launch": config.randomize_fingerprint_on_launch,
          "screen_max_width": config.screen_max_width,
          "screen_max_height": config.screen_max_height,
          "screen_min_width": config.screen_min_width,
          "screen_min_height": config.screen_min_height,
        })
      }
      "wayfern" => {
        let config = profile.wayfern_config.as_ref().cloned().unwrap_or_default();
        serde_json::json!({
          "browser": "wayfern",
          "fingerprint": config.fingerprint,
          "os": config.os,
          "randomize_fingerprint_on_launch": config.randomize_fingerprint_on_launch,
          "screen_max_width": config.screen_max_width,
          "screen_max_height": config.screen_max_height,
          "screen_min_width": config.screen_min_width,
          "screen_min_height": config.screen_min_height,
        })
      }
      _ => {
        return Err(McpError {
          code: -32000,
          message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
        })
      }
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&fingerprint_info).unwrap_or_default()
      }]
    }))
  }

  async fn handle_update_profile_fingerprint(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Fingerprint editing requires an active Pro subscription".to_string(),
      });
    }

    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let fingerprint = arguments.get("fingerprint").and_then(|v| v.as_str());
    let os = arguments.get("os").and_then(|v| v.as_str());
    let randomize = arguments
      .get("randomize_fingerprint_on_launch")
      .and_then(|v| v.as_bool());

    if let Some(os_val) = os {
      if !CLOUD_AUTH.is_fingerprint_os_allowed(Some(os_val)).await {
        return Err(McpError {
          code: -32000,
          message: format!(
            "OS spoofing to '{}' requires an active Pro subscription",
            os_val
          ),
        });
      }
    }

    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    match profile.browser.as_str() {
      "camoufox" => {
        let mut config = profile
          .camoufox_config
          .as_ref()
          .cloned()
          .unwrap_or_default();
        if let Some(fp) = fingerprint {
          config.fingerprint = Some(fp.to_string());
        }
        if let Some(os_val) = os {
          config.os = Some(os_val.to_string());
        }
        if let Some(r) = randomize {
          config.randomize_fingerprint_on_launch = Some(r);
        }
        ProfileManager::instance()
          .update_camoufox_config(app_handle.clone(), profile_id, config)
          .await
          .map_err(|e| McpError {
            code: -32000,
            message: format!("Failed to update camoufox config: {e}"),
          })?;
      }
      "wayfern" => {
        let mut config = profile.wayfern_config.as_ref().cloned().unwrap_or_default();
        if let Some(fp) = fingerprint {
          config.fingerprint = Some(fp.to_string());
        }
        if let Some(os_val) = os {
          config.os = Some(os_val.to_string());
        }
        if let Some(r) = randomize {
          config.randomize_fingerprint_on_launch = Some(r);
        }
        ProfileManager::instance()
          .update_wayfern_config(app_handle.clone(), profile_id, config)
          .await
          .map_err(|e| McpError {
            code: -32000,
            message: format!("Failed to update wayfern config: {e}"),
          })?;
      }
      _ => {
        return Err(McpError {
          code: -32000,
          message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
        })
      }
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Fingerprint configuration updated for profile '{}'", profile.name)
      }]
    }))
  }

  async fn handle_update_profile_proxy_bypass_rules(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let rules: Vec<String> = arguments
      .get("rules")
      .and_then(|v| v.as_array())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing rules array".to_string(),
      })?
      .iter()
      .filter_map(|v| v.as_str().map(|s| s.to_string()))
      .collect();

    let inner = self.inner.lock().await;
    let app_handle = inner.app_handle.as_ref().ok_or_else(|| McpError {
      code: -32000,
      message: "MCP server not properly initialized".to_string(),
    })?;

    let profile = ProfileManager::instance()
      .update_profile_proxy_bypass_rules(app_handle, profile_id, rules.clone())
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to update proxy bypass rules: {e}"),
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!(
          "Proxy bypass rules updated for profile '{}': {} rule(s) configured",
          profile.name,
          rules.len()
        )
      }]
    }))
  }

  async fn handle_list_extensions(&self) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
    let extensions = mgr.list_extensions().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to list extensions: {e}"),
    })?;
    Ok(serde_json::to_value(extensions).unwrap())
  }

  async fn handle_list_extension_groups(&self) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
    let groups = mgr.list_groups().map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to list extension groups: {e}"),
    })?;
    Ok(serde_json::to_value(groups).unwrap())
  }

  async fn handle_create_extension_group(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let name = arguments
      .get("name")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing required parameter: name".to_string(),
      })?;
    let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
    let group = mgr.create_group(name.to_string()).map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to create extension group: {e}"),
    })?;
    Ok(serde_json::to_value(group).unwrap())
  }

  async fn handle_delete_extension_mcp(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let extension_id = arguments
      .get("extension_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing required parameter: extension_id".to_string(),
      })?;
    let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
    mgr
      .delete_extension_internal(extension_id)
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to delete extension: {e}"),
      })?;
    Ok(serde_json::json!({"success": true}))
  }

  async fn handle_delete_extension_group_mcp(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let group_id = arguments
      .get("group_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing required parameter: group_id".to_string(),
      })?;
    let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
    // For MCP, we don't have an app_handle, but we need one for sync deletion.
    // Use the delete_group_internal which skips sync remote deletion.
    mgr.delete_group_internal(group_id).map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to delete extension group: {e}"),
    })?;
    if let Err(e) = crate::events::emit_empty("extensions-changed") {
      log::error!("Failed to emit extensions-changed event: {e}");
    }
    Ok(serde_json::json!({"success": true}))
  }

  async fn handle_assign_extension_group_to_profile(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.has_active_paid_subscription().await {
      return Err(McpError {
        code: -32000,
        message: "Extension management requires an active Pro subscription".to_string(),
      });
    }
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing required parameter: profile_id".to_string(),
      })?;
    let extension_group_id = arguments
      .get("extension_group_id")
      .and_then(|v| v.as_str())
      .map(|s| {
        if s.is_empty() {
          None
        } else {
          Some(s.to_string())
        }
      })
      .unwrap_or(None);

    // Validate compatibility if assigning
    if let Some(ref gid) = extension_group_id {
      let profile_manager = ProfileManager::instance();
      let profiles = profile_manager.list_profiles().map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;
      let profile = profiles
        .iter()
        .find(|p| p.id.to_string() == profile_id)
        .ok_or_else(|| McpError {
          code: -32000,
          message: format!("Profile '{profile_id}' not found"),
        })?;
      let mgr = crate::extension_manager::EXTENSION_MANAGER.lock().unwrap();
      mgr
        .validate_group_compatibility(gid, &profile.browser)
        .map_err(|e| McpError {
          code: -32000,
          message: format!("{e}"),
        })?;
    }

    let profile_manager = ProfileManager::instance();
    let profile = profile_manager
      .update_profile_extension_group(profile_id, extension_group_id)
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to assign extension group: {e}"),
      })?;
    Ok(serde_json::to_value(profile).unwrap())
  }

  async fn handle_get_team_locks(&self) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.is_on_team_plan().await {
      return Err(McpError {
        code: -32000,
        message: "Team features require an active team plan".to_string(),
      });
    }
    let locks = crate::team_lock::TEAM_LOCK.get_locks().await;
    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&locks).unwrap_or_default()
      }]
    }))
  }

  async fn handle_get_team_lock_status(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    if !CLOUD_AUTH.is_on_team_plan().await {
      return Err(McpError {
        code: -32000,
        message: "Team features require an active team plan".to_string(),
      });
    }
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let lock_status = crate::team_lock::TEAM_LOCK
      .get_lock_status(profile_id)
      .await;
    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&lock_status).unwrap_or_default()
      }]
    }))
  }

  // --- CDP utility methods for browser interaction ---

  async fn get_cdp_port_for_profile(&self, profile: &BrowserProfile) -> Result<u16, McpError> {
    let profiles_dir = ProfileManager::instance().get_profiles_dir();
    let profile_path = profile.get_profile_data_path(&profiles_dir);
    let profile_path_str = profile_path.to_string_lossy();

    // Retry a few times — port info may not be stored yet right after launch
    for attempt in 0..10 {
      if attempt > 0 {
        tokio::time::sleep(std::time::Duration::from_secs(1)).await;
      }
      let port = if profile.browser == "wayfern" {
        crate::wayfern_manager::WayfernManager::instance()
          .get_cdp_port(&profile_path_str)
          .await
      } else if profile.browser == "camoufox" {
        crate::camoufox_manager::CamoufoxManager::instance()
          .get_cdp_port(&profile_path_str)
          .await
      } else {
        None
      };
      if let Some(p) = port {
        return Ok(p);
      }
    }

    Err(McpError {
      code: -32000,
      message: format!(
        "No CDP connection available for profile '{}'. Make sure the browser is running.",
        profile.name
      ),
    })
  }

  async fn get_cdp_ws_url(&self, port: u16) -> Result<String, McpError> {
    let url = format!("http://127.0.0.1:{port}/json");
    let client = reqwest::Client::new();

    // Retry connecting to CDP endpoint (browser may still be starting up)
    let max_attempts = 15;
    let mut last_err = String::new();
    for attempt in 0..max_attempts {
      if attempt > 0 {
        tokio::time::sleep(std::time::Duration::from_secs(1)).await;
      }
      match client
        .get(&url)
        .timeout(std::time::Duration::from_secs(3))
        .send()
        .await
      {
        Ok(resp) => match resp.json::<Vec<serde_json::Value>>().await {
          Ok(targets) => {
            if let Some(ws_url) = targets
              .iter()
              .find(|t| t.get("type").and_then(|v| v.as_str()) == Some("page"))
              .and_then(|t| t.get("webSocketDebuggerUrl"))
              .and_then(|v| v.as_str())
            {
              return Ok(ws_url.to_string());
            }
            last_err = "No page target found in browser".to_string();
          }
          Err(e) => {
            last_err = format!("Failed to parse CDP targets: {e}");
          }
        },
        Err(e) => {
          last_err = format!("Failed to connect to browser CDP endpoint: {e}");
        }
      }
    }

    Err(McpError {
      code: -32000,
      message: last_err,
    })
  }

  async fn send_cdp(
    &self,
    ws_url: &str,
    method: &str,
    params: serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    use futures_util::sink::SinkExt;
    use futures_util::stream::StreamExt;
    use tokio_tungstenite::connect_async;
    use tokio_tungstenite::tungstenite::Message;

    let (mut ws_stream, _) = connect_async(ws_url).await.map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to connect to CDP WebSocket: {e}"),
    })?;

    let command = serde_json::json!({
      "id": 1,
      "method": method,
      "params": params
    });

    ws_stream
      .send(Message::Text(command.to_string().into()))
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to send CDP command: {e}"),
      })?;

    while let Some(msg) = ws_stream.next().await {
      let msg = msg.map_err(|e| McpError {
        code: -32000,
        message: format!("CDP WebSocket error: {e}"),
      })?;
      if let Message::Text(text) = msg {
        let response: serde_json::Value =
          serde_json::from_str(text.as_str()).map_err(|e| McpError {
            code: -32000,
            message: format!("Failed to parse CDP response: {e}"),
          })?;
        if response.get("id") == Some(&serde_json::json!(1)) {
          if let Some(error) = response.get("error") {
            return Err(McpError {
              code: -32000,
              message: format!("CDP error: {error}"),
            });
          }
          return Ok(
            response
              .get("result")
              .cloned()
              .unwrap_or(serde_json::json!({})),
          );
        }
      }
    }

    Err(McpError {
      code: -32000,
      message: "No response received from CDP".to_string(),
    })
  }

  async fn send_human_keystrokes(
    &self,
    ws_url: &str,
    text: &str,
    wpm: Option<f64>,
  ) -> Result<(), McpError> {
    use crate::human_typing::{MarkovTyper, TypingAction};
    use futures_util::sink::SinkExt;
    use futures_util::stream::StreamExt;
    use tokio_tungstenite::connect_async;
    use tokio_tungstenite::tungstenite::Message;

    let events = MarkovTyper::new(text, wpm).run();

    let (mut ws_stream, _) = connect_async(ws_url).await.map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to connect to CDP WebSocket: {e}"),
    })?;

    let mut cmd_id = 1u64;
    let mut last_time = 0.0;

    for event in &events {
      let delay = event.time - last_time;
      if delay > 0.0 {
        tokio::time::sleep(std::time::Duration::from_secs_f64(delay)).await;
      }
      last_time = event.time;

      match &event.action {
        TypingAction::Char(ch) => {
          let text_str = ch.to_string();
          // keyDown
          let down = serde_json::json!({
            "id": cmd_id,
            "method": "Input.dispatchKeyEvent",
            "params": {
              "type": "keyDown",
              "text": text_str,
              "key": text_str,
              "unmodifiedText": text_str,
            }
          });
          cmd_id += 1;
          ws_stream
            .send(Message::Text(down.to_string().into()))
            .await
            .map_err(|e| McpError {
              code: -32000,
              message: format!("Failed to send key event: {e}"),
            })?;
          // Drain response
          let _ = ws_stream.next().await;

          // keyUp
          let up = serde_json::json!({
            "id": cmd_id,
            "method": "Input.dispatchKeyEvent",
            "params": {
              "type": "keyUp",
              "key": text_str,
            }
          });
          cmd_id += 1;
          ws_stream
            .send(Message::Text(up.to_string().into()))
            .await
            .map_err(|e| McpError {
              code: -32000,
              message: format!("Failed to send key event: {e}"),
            })?;
          let _ = ws_stream.next().await;
        }
        TypingAction::Backspace => {
          let down = serde_json::json!({
            "id": cmd_id,
            "method": "Input.dispatchKeyEvent",
            "params": {
              "type": "keyDown",
              "key": "Backspace",
              "code": "Backspace",
              "windowsVirtualKeyCode": 8,
              "nativeVirtualKeyCode": 8,
            }
          });
          cmd_id += 1;
          ws_stream
            .send(Message::Text(down.to_string().into()))
            .await
            .map_err(|e| McpError {
              code: -32000,
              message: format!("Failed to send key event: {e}"),
            })?;
          let _ = ws_stream.next().await;

          let up = serde_json::json!({
            "id": cmd_id,
            "method": "Input.dispatchKeyEvent",
            "params": {
              "type": "keyUp",
              "key": "Backspace",
              "code": "Backspace",
              "windowsVirtualKeyCode": 8,
              "nativeVirtualKeyCode": 8,
            }
          });
          cmd_id += 1;
          ws_stream
            .send(Message::Text(up.to_string().into()))
            .await
            .map_err(|e| McpError {
              code: -32000,
              message: format!("Failed to send key event: {e}"),
            })?;
          let _ = ws_stream.next().await;
        }
      }
    }

    Ok(())
  }

  /// Send a CDP command and wait for the page to finish loading.
  /// Uses a single WebSocket connection to: enable Page events, send the command,
  /// wait for the command response, then wait for `Page.loadEventFired`.
  async fn send_cdp_and_wait_for_load(
    &self,
    ws_url: &str,
    method: &str,
    params: serde_json::Value,
    timeout_secs: u64,
  ) -> Result<serde_json::Value, McpError> {
    use futures_util::sink::SinkExt;
    use futures_util::stream::StreamExt;
    use tokio_tungstenite::connect_async;
    use tokio_tungstenite::tungstenite::Message;

    let (mut ws_stream, _) = connect_async(ws_url).await.map_err(|e| McpError {
      code: -32000,
      message: format!("Failed to connect to CDP WebSocket: {e}"),
    })?;

    // Enable Page domain events so we receive loadEventFired
    let enable_cmd = serde_json::json!({
      "id": 1,
      "method": "Page.enable",
      "params": {}
    });
    ws_stream
      .send(Message::Text(enable_cmd.to_string().into()))
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to send Page.enable: {e}"),
      })?;

    // Wait for Page.enable response
    loop {
      let msg = ws_stream
        .next()
        .await
        .ok_or_else(|| McpError {
          code: -32000,
          message: "WebSocket closed waiting for Page.enable response".to_string(),
        })?
        .map_err(|e| McpError {
          code: -32000,
          message: format!("CDP WebSocket error: {e}"),
        })?;
      if let Message::Text(text) = msg {
        let resp: serde_json::Value = serde_json::from_str(text.as_str()).unwrap_or_default();
        if resp.get("id") == Some(&serde_json::json!(1)) {
          break;
        }
      }
    }

    // Send the actual command (e.g., Page.navigate)
    let command = serde_json::json!({
      "id": 2,
      "method": method,
      "params": params
    });
    ws_stream
      .send(Message::Text(command.to_string().into()))
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to send CDP command: {e}"),
      })?;

    // Wait for command response and then for Page.loadEventFired
    let mut command_result = None;
    let deadline = tokio::time::Instant::now() + tokio::time::Duration::from_secs(timeout_secs);

    loop {
      let remaining = deadline.saturating_duration_since(tokio::time::Instant::now());
      if remaining.is_zero() {
        // Timed out waiting for load — return the command result if we have it
        break;
      }

      let msg = match tokio::time::timeout(remaining, ws_stream.next()).await {
        Ok(Some(Ok(msg))) => msg,
        Ok(Some(Err(e))) => {
          return Err(McpError {
            code: -32000,
            message: format!("CDP WebSocket error: {e}"),
          });
        }
        Ok(None) => break, // stream ended
        Err(_) => break,   // timeout
      };

      if let Message::Text(text) = msg {
        let response: serde_json::Value = serde_json::from_str(text.as_str()).unwrap_or_default();

        // Check for command response
        if response.get("id") == Some(&serde_json::json!(2)) {
          if let Some(error) = response.get("error") {
            return Err(McpError {
              code: -32000,
              message: format!("CDP error: {error}"),
            });
          }
          command_result = Some(
            response
              .get("result")
              .cloned()
              .unwrap_or(serde_json::json!({})),
          );
        }

        // Check for Page.loadEventFired — page is fully loaded
        if response.get("method") == Some(&serde_json::json!("Page.loadEventFired")) {
          break;
        }
      }
    }

    // Disable Page domain events
    let disable_cmd = serde_json::json!({
      "id": 3,
      "method": "Page.disable",
      "params": {}
    });
    let _ = ws_stream
      .send(Message::Text(disable_cmd.to_string().into()))
      .await;

    command_result.ok_or_else(|| McpError {
      code: -32000,
      message: "No response received from CDP".to_string(),
    })
  }

  fn get_running_profile(&self, profile_id: &str) -> Result<BrowserProfile, McpError> {
    let profiles = ProfileManager::instance()
      .list_profiles()
      .map_err(|e| McpError {
        code: -32000,
        message: format!("Failed to list profiles: {e}"),
      })?;

    let profile = profiles
      .into_iter()
      .find(|p| p.id.to_string() == profile_id)
      .ok_or_else(|| McpError {
        code: -32000,
        message: format!("Profile not found: {profile_id}"),
      })?;

    if profile.browser != "wayfern" && profile.browser != "camoufox" {
      return Err(McpError {
        code: -32000,
        message: "MCP only supports Wayfern and Camoufox profiles".to_string(),
      });
    }

    if profile.process_id.is_none() {
      return Err(McpError {
        code: -32000,
        message: format!("Profile '{}' is not running", profile.name),
      });
    }

    Ok(profile)
  }

  // --- Browser interaction handlers ---

  async fn handle_navigate(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let url = arguments
      .get("url")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing url".to_string(),
      })?;

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    self
      .send_cdp_and_wait_for_load(
        &ws_url,
        "Page.navigate",
        serde_json::json!({ "url": url }),
        30,
      )
      .await?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Navigated to {url}")
      }]
    }))
  }

  async fn handle_screenshot(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let format = arguments
      .get("format")
      .and_then(|v| v.as_str())
      .unwrap_or("png");
    let quality = arguments.get("quality").and_then(|v| v.as_i64());
    let full_page = arguments
      .get("full_page")
      .and_then(|v| v.as_bool())
      .unwrap_or(false);

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let mut params = serde_json::json!({ "format": format });

    if let Some(q) = quality {
      params["quality"] = serde_json::json!(q);
    }

    if full_page {
      let layout = self
        .send_cdp(&ws_url, "Page.getLayoutMetrics", serde_json::json!({}))
        .await?;

      if let Some(content_size) = layout.get("contentSize") {
        params["clip"] = serde_json::json!({
          "x": 0,
          "y": 0,
          "width": content_size.get("width").and_then(|v| v.as_f64()).unwrap_or(1920.0),
          "height": content_size.get("height").and_then(|v| v.as_f64()).unwrap_or(1080.0),
          "scale": 1
        });
        params["captureBeyondViewport"] = serde_json::json!(true);
      }
    }

    let result = self
      .send_cdp(&ws_url, "Page.captureScreenshot", params)
      .await?;

    let data = result
      .get("data")
      .and_then(|v| v.as_str())
      .unwrap_or_default();

    Ok(serde_json::json!({
      "content": [{
        "type": "image",
        "data": data,
        "mimeType": format!("image/{format}")
      }]
    }))
  }

  async fn handle_evaluate_javascript(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let expression = arguments
      .get("expression")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing expression".to_string(),
      })?;
    let await_promise = arguments
      .get("await_promise")
      .and_then(|v| v.as_bool())
      .unwrap_or(false);
    let wait_for_load = arguments
      .get("wait_for_load")
      .and_then(|v| v.as_bool())
      .unwrap_or(false);

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let cdp_params = serde_json::json!({
      "expression": expression,
      "returnByValue": true,
      "awaitPromise": await_promise,
    });

    let result = if wait_for_load {
      self
        .send_cdp_and_wait_for_load(&ws_url, "Runtime.evaluate", cdp_params, 30)
        .await?
    } else {
      self
        .send_cdp(&ws_url, "Runtime.evaluate", cdp_params)
        .await?
    };

    let value = if let Some(exception) = result.get("exceptionDetails") {
      let text = exception
        .get("text")
        .or_else(|| {
          exception
            .get("exception")
            .and_then(|e| e.get("description"))
        })
        .and_then(|v| v.as_str())
        .unwrap_or("Unknown error");
      serde_json::json!({ "error": text })
    } else if let Some(r) = result.get("result") {
      let val = r.get("value").cloned().unwrap_or(serde_json::json!(null));
      serde_json::json!({ "value": val, "type": r.get("type") })
    } else {
      serde_json::json!({ "value": null })
    };

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&value).unwrap_or_default()
      }]
    }))
  }

  async fn handle_click_element(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let selector = arguments
      .get("selector")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing selector".to_string(),
      })?;

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let selector_escaped = selector.replace('\\', "\\\\").replace('\'', "\\'");
    let js = format!(
      r#"(() => {{
        const el = document.querySelector('{}');
        if (!el) throw new Error('Element not found: {}');
        el.scrollIntoView({{block: 'center'}});
        el.click();
        return true;
      }})()"#,
      selector_escaped, selector_escaped
    );

    // Use send_cdp_and_wait_for_load: if the click triggers navigation,
    // we wait for the new page to load. If not, the 10s timeout expires
    // and we return immediately.
    let result = self
      .send_cdp_and_wait_for_load(
        &ws_url,
        "Runtime.evaluate",
        serde_json::json!({
          "expression": js,
          "returnByValue": true,
        }),
        10,
      )
      .await?;

    if let Some(exception) = result.get("exceptionDetails") {
      let msg = exception
        .get("exception")
        .and_then(|e| e.get("description"))
        .or_else(|| exception.get("text"))
        .and_then(|v| v.as_str())
        .unwrap_or("Click failed");
      return Err(McpError {
        code: -32000,
        message: msg.to_string(),
      });
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Clicked element: {selector}")
      }]
    }))
  }

  async fn handle_type_text(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let selector = arguments
      .get("selector")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing selector".to_string(),
      })?;
    let text = arguments
      .get("text")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing text".to_string(),
      })?;
    let clear_first = arguments
      .get("clear_first")
      .and_then(|v| v.as_bool())
      .unwrap_or(true);
    let instant = arguments
      .get("instant")
      .and_then(|v| v.as_bool())
      .unwrap_or(false);
    let wpm = arguments.get("wpm").and_then(|v| v.as_f64());

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let selector_escaped = selector.replace('\\', "\\\\").replace('\'', "\\'");
    let focus_js = if clear_first {
      format!(
        r#"(() => {{
          const el = document.querySelector('{}');
          if (!el) throw new Error('Element not found: {}');
          el.scrollIntoView({{block: 'center'}});
          el.focus();
          el.value = '';
          el.dispatchEvent(new Event('input', {{bubbles: true}}));
          return true;
        }})()"#,
        selector_escaped, selector_escaped
      )
    } else {
      format!(
        r#"(() => {{
          const el = document.querySelector('{}');
          if (!el) throw new Error('Element not found: {}');
          el.scrollIntoView({{block: 'center'}});
          el.focus();
          return true;
        }})()"#,
        selector_escaped, selector_escaped
      )
    };

    let focus_result = self
      .send_cdp(
        &ws_url,
        "Runtime.evaluate",
        serde_json::json!({
          "expression": focus_js,
          "returnByValue": true,
        }),
      )
      .await?;

    if let Some(exception) = focus_result.get("exceptionDetails") {
      let msg = exception
        .get("exception")
        .and_then(|e| e.get("description"))
        .or_else(|| exception.get("text"))
        .and_then(|v| v.as_str())
        .unwrap_or("Focus failed");
      return Err(McpError {
        code: -32000,
        message: msg.to_string(),
      });
    }

    if instant {
      self
        .send_cdp(
          &ws_url,
          "Input.insertText",
          serde_json::json!({ "text": text }),
        )
        .await?;
    } else {
      self.send_human_keystrokes(&ws_url, text, wpm).await?;
    }

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": format!("Typed text into element: {selector}")
      }]
    }))
  }

  async fn handle_get_page_content(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;
    let format = arguments
      .get("format")
      .and_then(|v| v.as_str())
      .unwrap_or("text");
    let selector = arguments.get("selector").and_then(|v| v.as_str());

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let js = if let Some(sel) = selector {
      let sel_escaped = sel.replace('\\', "\\\\").replace('\'', "\\'");
      if format == "html" {
        format!(
          r#"(() => {{
            const el = document.querySelector('{}');
            return el ? el.outerHTML : null;
          }})()"#,
          sel_escaped
        )
      } else {
        format!(
          r#"(() => {{
            const el = document.querySelector('{}');
            return el ? el.innerText : null;
          }})()"#,
          sel_escaped
        )
      }
    } else if format == "html" {
      "document.documentElement.outerHTML".to_string()
    } else {
      "document.body.innerText".to_string()
    };

    let result = self
      .send_cdp(
        &ws_url,
        "Runtime.evaluate",
        serde_json::json!({
          "expression": js,
          "returnByValue": true,
        }),
      )
      .await?;

    let content = result
      .get("result")
      .and_then(|r| r.get("value"))
      .and_then(|v| v.as_str())
      .unwrap_or("");

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": content
      }]
    }))
  }

  async fn handle_get_page_info(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let profile_id = arguments
      .get("profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing profile_id".to_string(),
      })?;

    let profile = self.get_running_profile(profile_id)?;
    let cdp_port = self.get_cdp_port_for_profile(&profile).await?;
    let ws_url = self.get_cdp_ws_url(cdp_port).await?;

    let result = self
      .send_cdp(
        &ws_url,
        "Runtime.evaluate",
        serde_json::json!({
          "expression": "JSON.stringify({url: location.href, title: document.title, readyState: document.readyState})",
          "returnByValue": true,
        }),
      )
      .await?;

    let info_str = result
      .get("result")
      .and_then(|r| r.get("value"))
      .and_then(|v| v.as_str())
      .unwrap_or("{}");

    let info: serde_json::Value = serde_json::from_str(info_str).unwrap_or(serde_json::json!({}));

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&info).unwrap_or_default()
      }]
    }))
  }

  // --- Synchronizer handlers ---

  async fn handle_start_sync_session(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let leader_id = arguments
      .get("leader_profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing leader_profile_id".to_string(),
      })?;
    let follower_ids: Vec<String> = arguments
      .get("follower_profile_ids")
      .and_then(|v| v.as_array())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing follower_profile_ids".to_string(),
      })?
      .iter()
      .filter_map(|v| v.as_str().map(|s| s.to_string()))
      .collect();

    let app = {
      let inner = self.inner.lock().await;
      inner.app_handle.clone().ok_or_else(|| McpError {
        code: -32000,
        message: "MCP server not properly initialized".to_string(),
      })?
    };

    let info = crate::synchronizer::SynchronizerManager::instance()
      .start_session(app, leader_id.to_string(), follower_ids)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: e,
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&info).unwrap_or_default()
      }]
    }))
  }

  async fn handle_stop_sync_session(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let session_id = arguments
      .get("session_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing session_id".to_string(),
      })?;

    let app = {
      let inner = self.inner.lock().await;
      inner.app_handle.clone().ok_or_else(|| McpError {
        code: -32000,
        message: "MCP server not properly initialized".to_string(),
      })?
    };

    crate::synchronizer::SynchronizerManager::instance()
      .stop_session(app, session_id)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: e,
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": "Sync session stopped"
      }]
    }))
  }

  async fn handle_get_sync_sessions(&self) -> Result<serde_json::Value, McpError> {
    let sessions = crate::synchronizer::SynchronizerManager::instance()
      .get_sessions()
      .await;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": serde_json::to_string_pretty(&sessions).unwrap_or_default()
      }]
    }))
  }

  async fn handle_remove_sync_follower(
    &self,
    arguments: &serde_json::Value,
  ) -> Result<serde_json::Value, McpError> {
    let session_id = arguments
      .get("session_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing session_id".to_string(),
      })?;
    let follower_id = arguments
      .get("follower_profile_id")
      .and_then(|v| v.as_str())
      .ok_or_else(|| McpError {
        code: -32602,
        message: "Missing follower_profile_id".to_string(),
      })?;

    let app = {
      let inner = self.inner.lock().await;
      inner.app_handle.clone().ok_or_else(|| McpError {
        code: -32000,
        message: "MCP server not properly initialized".to_string(),
      })?
    };

    crate::synchronizer::SynchronizerManager::instance()
      .remove_follower(app, session_id, follower_id)
      .await
      .map_err(|e| McpError {
        code: -32000,
        message: e,
      })?;

    Ok(serde_json::json!({
      "content": [{
        "type": "text",
        "text": "Follower removed from sync session"
      }]
    }))
  }
}

lazy_static::lazy_static! {
  static ref MCP_SERVER: McpServer = McpServer::new();
}

#[cfg(test)]
mod tests {
  use super::*;

  #[test]
  fn test_mcp_tools_count() {
    let server = McpServer::new();
    let tools = server.get_tools();

    // Should have at least 41 tools (34 + 7 browser interaction tools)
    assert!(tools.len() >= 41);

    // Check tool names
    let tool_names: Vec<&str> = tools.iter().map(|t| t.name.as_str()).collect();
    // Profile tools
    assert!(tool_names.contains(&"list_profiles"));
    assert!(tool_names.contains(&"get_profile"));
    assert!(tool_names.contains(&"run_profile"));
    assert!(tool_names.contains(&"kill_profile"));
    assert!(tool_names.contains(&"get_profile_status"));
    // Group tools
    assert!(tool_names.contains(&"list_groups"));
    assert!(tool_names.contains(&"get_group"));
    assert!(tool_names.contains(&"create_group"));
    assert!(tool_names.contains(&"update_group"));
    assert!(tool_names.contains(&"delete_group"));
    assert!(tool_names.contains(&"assign_profiles_to_group"));
    // Proxy tools
    assert!(tool_names.contains(&"list_proxies"));
    assert!(tool_names.contains(&"get_proxy"));
    assert!(tool_names.contains(&"create_proxy"));
    assert!(tool_names.contains(&"update_proxy"));
    assert!(tool_names.contains(&"delete_proxy"));
    // Proxy import/export tools
    assert!(tool_names.contains(&"export_proxies"));
    assert!(tool_names.contains(&"import_proxies"));
    // VPN tools
    assert!(tool_names.contains(&"import_vpn"));
    assert!(tool_names.contains(&"list_vpn_configs"));
    assert!(tool_names.contains(&"delete_vpn"));
    assert!(tool_names.contains(&"connect_vpn"));
    assert!(tool_names.contains(&"disconnect_vpn"));
    assert!(tool_names.contains(&"get_vpn_status"));
    // Fingerprint tools
    assert!(tool_names.contains(&"get_profile_fingerprint"));
    assert!(tool_names.contains(&"update_profile_fingerprint"));
    assert!(tool_names.contains(&"update_profile_proxy_bypass_rules"));
    // Extension tools
    assert!(tool_names.contains(&"list_extensions"));
    assert!(tool_names.contains(&"list_extension_groups"));
    assert!(tool_names.contains(&"create_extension_group"));
    assert!(tool_names.contains(&"delete_extension"));
    assert!(tool_names.contains(&"delete_extension_group"));
    assert!(tool_names.contains(&"assign_extension_group_to_profile"));
    // Team lock tools
    assert!(tool_names.contains(&"get_team_locks"));
    assert!(tool_names.contains(&"get_team_lock_status"));
    // Synchronizer tools
    assert!(tool_names.contains(&"start_sync_session"));
    assert!(tool_names.contains(&"stop_sync_session"));
    assert!(tool_names.contains(&"get_sync_sessions"));
    assert!(tool_names.contains(&"remove_sync_follower"));
    // Browser interaction tools
    assert!(tool_names.contains(&"navigate"));
    assert!(tool_names.contains(&"screenshot"));
    assert!(tool_names.contains(&"evaluate_javascript"));
    assert!(tool_names.contains(&"click_element"));
    assert!(tool_names.contains(&"type_text"));
    assert!(tool_names.contains(&"get_page_content"));
    assert!(tool_names.contains(&"get_page_info"));
  }

  #[test]
  fn test_mcp_server_initial_state() {
    let server = McpServer::new();
    assert!(!server.is_running());
  }
}