from fastapi import FastAPI, Request, Response
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
from services.data_fetcher import start_scheduler, stop_scheduler, get_latest_data, source_timestamps
from services.ais_stream import start_ais_stream, stop_ais_stream
from services.carrier_tracker import start_carrier_tracker, stop_carrier_tracker
import uvicorn
import logging
import hashlib
import json as json_mod
import os
import socket

logging.basicConfig(level=logging.INFO)


def _build_cors_origins():
    """Build a CORS origins whitelist: localhost + LAN IPs + env overrides.
    Falls back to wildcard only if auto-detection fails entirely."""
    origins = [
        "http://localhost:3000",
        "http://127.0.0.1:3000",
        "http://localhost:8000",
        "http://127.0.0.1:8000",
    ]
    # Add this machine's LAN IPs (covers common home/office setups)
    try:
        hostname = socket.gethostname()
        for info in socket.getaddrinfo(hostname, None, socket.AF_INET):
            ip = info[4][0]
            if ip not in ("127.0.0.1", "0.0.0.0"):
                origins.append(f"http://{ip}:3000")
                origins.append(f"http://{ip}:8000")
    except Exception:
        pass
    # Allow user override via CORS_ORIGINS env var (comma-separated)
    extra = os.environ.get("CORS_ORIGINS", "")
    if extra:
        origins.extend([o.strip() for o in extra.split(",") if o.strip()])
    return list(set(origins))  # deduplicate

@asynccontextmanager
async def lifespan(app: FastAPI):
    # Startup: Start background data fetching, AIS stream, and carrier tracker
    start_carrier_tracker()
    start_ais_stream()
    start_scheduler()
    yield
    # Shutdown: Stop all background services
    stop_ais_stream()
    stop_scheduler()
    stop_carrier_tracker()

app = FastAPI(title="Live Risk Dashboard API", lifespan=lifespan)

from fastapi.middleware.gzip import GZipMiddleware
app.add_middleware(GZipMiddleware, minimum_size=1000)
app.add_middleware(
    CORSMiddleware,
    allow_origins=_build_cors_origins(),
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

from services.data_fetcher import update_all_data

@app.get("/api/refresh")
async def force_refresh():
    # Force an immediate synchronous update of the data payload
    import threading
    t = threading.Thread(target=update_all_data)
    t.start()
    return {"status": "refreshing in background"}

@app.get("/api/live-data")
async def live_data():
    return get_latest_data()

def _etag_response(request: Request, payload: dict, prefix: str = "", default=None):
    """Serialize once, hash the bytes for ETag, return 304 or full response."""
    content = json_mod.dumps(payload, default=default)
    etag = hashlib.md5(f"{prefix}{content[:256]}".encode()).hexdigest()[:16]
    if request.headers.get("if-none-match") == etag:
        return Response(status_code=304, headers={"ETag": etag, "Cache-Control": "no-cache"})
    return Response(content=content, media_type="application/json",
                    headers={"ETag": etag, "Cache-Control": "no-cache"})

@app.get("/api/live-data/fast")
async def live_data_fast(request: Request):
    d = get_latest_data()
    payload = {
        "commercial_flights": d.get("commercial_flights", []),
        "military_flights": d.get("military_flights", []),
        "private_flights": d.get("private_flights", []),
        "private_jets": d.get("private_jets", []),
        "tracked_flights": d.get("tracked_flights", []),
        "ships": d.get("ships", []),
        "cctv": d.get("cctv", []),
        "uavs": d.get("uavs", []),
        "liveuamap": d.get("liveuamap", []),
        "gps_jamming": d.get("gps_jamming", []),
        "freshness": dict(source_timestamps),
    }
    return _etag_response(request, payload, prefix="fast|")

@app.get("/api/live-data/slow")
async def live_data_slow(request: Request):
    d = get_latest_data()
    payload = {
        "last_updated": d.get("last_updated"),
        "news": d.get("news", []),
        "stocks": d.get("stocks", {}),
        "oil": d.get("oil", {}),
        "weather": d.get("weather"),
        "traffic": d.get("traffic", []),
        "earthquakes": d.get("earthquakes", []),
        "frontlines": d.get("frontlines"),
        "gdelt": d.get("gdelt", []),
        "airports": d.get("airports", []),
        "satellites": d.get("satellites", []),
        "kiwisdr": d.get("kiwisdr", []),
        "space_weather": d.get("space_weather"),
        "internet_outages": d.get("internet_outages", []),
        "firms_fires": d.get("firms_fires", []),
        "datacenters": d.get("datacenters", []),
        "freshness": dict(source_timestamps),
    }
    return _etag_response(request, payload, prefix="slow|", default=str)

@app.get("/api/debug-latest")
async def debug_latest_data():
    return list(get_latest_data().keys())


@app.get("/api/health")
async def health_check():
    import time
    d = get_latest_data()
    last = d.get("last_updated")
    return {
        "status": "ok",
        "last_updated": last,
        "sources": {
            "flights": len(d.get("commercial_flights", [])),
            "military": len(d.get("military_flights", [])),
            "ships": len(d.get("ships", [])),
            "satellites": len(d.get("satellites", [])),
            "earthquakes": len(d.get("earthquakes", [])),
            "cctv": len(d.get("cctv", [])),
            "news": len(d.get("news", [])),
            "uavs": len(d.get("uavs", [])),
            "firms_fires": len(d.get("firms_fires", [])),
            "liveuamap": len(d.get("liveuamap", [])),
            "gdelt": len(d.get("gdelt", [])),
        },
        "freshness": dict(source_timestamps),
        "uptime_seconds": round(time.time() - _start_time),
    }

_start_time = __import__("time").time()

from services.radio_intercept import get_top_broadcastify_feeds, get_openmhz_systems, get_recent_openmhz_calls, find_nearest_openmhz_system

@app.get("/api/radio/top")
async def get_top_radios():
    return get_top_broadcastify_feeds()

@app.get("/api/radio/openmhz/systems")
async def api_get_openmhz_systems():
    return get_openmhz_systems()

@app.get("/api/radio/openmhz/calls/{sys_name}")
async def api_get_openmhz_calls(sys_name: str):
    return get_recent_openmhz_calls(sys_name)

@app.get("/api/radio/nearest")
async def api_get_nearest_radio(lat: float, lng: float):
    return find_nearest_openmhz_system(lat, lng)

from services.radio_intercept import find_nearest_openmhz_systems_list

@app.get("/api/radio/nearest-list")
async def api_get_nearest_radios_list(lat: float, lng: float, limit: int = 5):
    return find_nearest_openmhz_systems_list(lat, lng, limit=limit)

from services.network_utils import fetch_with_curl

@app.get("/api/route/{callsign}")
async def get_flight_route(callsign: str):
    r = fetch_with_curl("https://api.adsb.lol/api/0/routeset", method="POST", json_data={"planes": [{"callsign": callsign}]}, timeout=10)
    if r.status_code == 200:
        data = r.json()
        route_list = []
        if isinstance(data, dict):
            route_list = data.get("value", [])
        elif isinstance(data, list):
            route_list = data
        
        if route_list and len(route_list) > 0:
            route = route_list[0]
            airports = route.get("_airports", [])
            if len(airports) >= 2:
                return {
                    "orig_loc": [airports[0].get("lon", 0), airports[0].get("lat", 0)],
                    "dest_loc": [airports[-1].get("lon", 0), airports[-1].get("lat", 0)]
                }
    return {}

from services.region_dossier import get_region_dossier

@app.get("/api/region-dossier")
def api_region_dossier(lat: float, lng: float):
    """Sync def so FastAPI runs it in a threadpool — prevents blocking the event loop."""
    return get_region_dossier(lat, lng)

from services.sentinel_search import search_sentinel2_scene

@app.get("/api/sentinel2/search")
def api_sentinel2_search(lat: float, lng: float):
    """Search for latest Sentinel-2 imagery at a point. Sync for threadpool execution."""
    return search_sentinel2_scene(lat, lng)

# ---------------------------------------------------------------------------
# API Settings — key registry & management
# ---------------------------------------------------------------------------
from services.api_settings import get_api_keys, update_api_key
from pydantic import BaseModel

class ApiKeyUpdate(BaseModel):
    env_key: str
    value: str

@app.get("/api/settings/api-keys")
async def api_get_keys():
    return get_api_keys()

@app.put("/api/settings/api-keys")
async def api_update_key(body: ApiKeyUpdate):
    ok = update_api_key(body.env_key, body.value)
    if ok:
        return {"status": "updated", "env_key": body.env_key}
    return {"status": "error", "message": "Failed to update .env file"}

# ---------------------------------------------------------------------------
# News Feed Configuration
# ---------------------------------------------------------------------------
from services.news_feed_config import get_feeds, save_feeds, reset_feeds

@app.get("/api/settings/news-feeds")
async def api_get_news_feeds():
    return get_feeds()

@app.put("/api/settings/news-feeds")
async def api_save_news_feeds(request: Request):
    body = await request.json()
    ok = save_feeds(body)
    if ok:
        return {"status": "updated", "count": len(body)}
    return Response(
        content=json_mod.dumps({"status": "error", "message": "Validation failed (max 20 feeds, each needs name/url/weight 1-5)"}),
        status_code=400,
        media_type="application/json",
    )

@app.post("/api/settings/news-feeds/reset")
async def api_reset_news_feeds():
    ok = reset_feeds()
    if ok:
        return {"status": "reset", "feeds": get_feeds()}
    return {"status": "error", "message": "Failed to reset feeds"}

if __name__ == "__main__":
    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

# Application successfully initialized with background scraping tasks