import assert from "node:assert/strict";
import { mkdir, readdir, readFile, utimes, writeFile } from "node:fs/promises";
import { createServer } from "node:http";
import path from "node:path";
import test from "node:test";
import { appFromEnvironment } from "../lib/app.mjs";
import { extensionZipBase64, wireGuardFixture } from "../lib/fixtures.mjs";

const syncUrl = process.env.DONUT_E2E_SYNC_URL;
const syncToken = process.env.DONUT_E2E_SYNC_TOKEN;

async function syncRequest(endpoint, body) {
  const response = await fetch(`${syncUrl}/v1/objects/${endpoint}`, {
    method: "POST",
    headers: {
      authorization: `Bearer ${syncToken}`,
      "content-type": "application/json",
    },
    body: JSON.stringify(body),
  });
  const text = await response.text();
  if (!response.ok) {
    throw new Error(
      `Sync ${endpoint} failed with HTTP ${response.status}: ${text}`,
    );
  }
  return text ? JSON.parse(text) : null;
}

async function listRemote(prefix = "") {
  const result = await syncRequest("list", {
    prefix,
    maxKeys: 1000,
    continuationToken: null,
  });
  return result.objects;
}

async function downloadRemote(key) {
  const presigned = await syncRequest("presign-download", {
    key,
    expiresIn: 300,
  });
  const response = await fetch(presigned.url);
  assert.equal(response.status, 200, `Could not download remote object ${key}`);
  return Buffer.from(await response.arrayBuffer());
}

async function configureSync(app) {
  const saved = await app.invoke("save_sync_settings", {
    syncServerUrl: syncUrl,
    syncToken,
  });
  assert.equal(saved.sync_server_url, syncUrl);
  assert.equal(saved.sync_token, syncToken);
  assert.deepEqual(await app.invoke("get_sync_settings"), saved);
  await app.invoke("restart_sync_service");
  await new Promise((resolve) => setTimeout(resolve, 750));
}

async function createProfile(app, name) {
  return app.invoke("create_browser_profile_new", {
    name,
    browserStr: "wayfern",
    version: "150.0.7871.100",
    releaseType: "stable",
    proxyId: null,
    vpnId: null,
    // Keep sync tests deterministic and network-free; browser.test.mjs covers
    // generation through the real Wayfern binary.
    wayfernConfig: { fingerprint: "{}" },
    groupId: null,
    ephemeral: false,
    dnsBlocklist: null,
    launchHook: null,
  });
}

async function waitFor(app, callback, description, timeoutMs = 45_000) {
  return app.waitFor(callback, { description, timeoutMs, intervalMs: 250 });
}

test("remote profile changes return after a long outage without another app restart", async () => {
  assert.ok(syncUrl && syncToken, "Sync infrastructure was not started");
  const app = appFromEnvironment("sync-remote-return");
  let mode = "missing";
  let profileId;
  let missingManifests = 0;
  let failedPulls = 0;
  let failedFiles = 0;
  let proxyUrl;
  const proxy = createServer(async (request, response) => {
    try {
      const chunks = [];
      for await (const chunk of request) chunks.push(chunk);
      const body = Buffer.concat(chunks).toString();
      const input = body ? JSON.parse(body) : {};
      if (request.url === "/failed-file") {
        failedFiles += 1;
        response.writeHead(503).end();
        return;
      }
      if (request.url.endsWith("/subscribe")) {
        response.writeHead(503).end();
        return;
      }
      if (mode === "offline") {
        if (input.key === `profiles/${profileId}/metadata.json`) {
          failedPulls += 1;
        }
        response.writeHead(503).end();
        return;
      }
      if (
        mode === "missing" &&
        request.url.endsWith("/stat") &&
        input.key === `profiles/${profileId}/manifest.json`
      ) {
        missingManifests += 1;
        response.writeHead(200, { "content-type": "application/json" });
        response.end(JSON.stringify({ exists: false }));
        return;
      }
      const upstream = await fetch(`${syncUrl}${request.url}`, {
        method: request.method,
        headers: {
          authorization: `Bearer ${syncToken}`,
          "content-type": "application/json",
        },
        ...(body ? { body } : {}),
        signal: AbortSignal.timeout(10_000),
      });
      let text = await upstream.text();
      if (
        mode === "partial" &&
        request.url.endsWith("/presign-download-batch")
      ) {
        const result = JSON.parse(text);
        for (const item of result.items ?? []) {
          if (item.key.endsWith("/History"))
            item.url = `${proxyUrl}/failed-file`;
        }
        text = JSON.stringify(result);
      }
      response.writeHead(upstream.status, {
        "content-type": "application/json",
      });
      response.end(text);
    } catch {
      response.writeHead(502).end();
    }
  });
  await new Promise((resolve) => proxy.listen(0, "127.0.0.1", resolve));
  proxyUrl = `http://127.0.0.1:${proxy.address().port}`;

  try {
    await app.start();
    await configureSync(app);
    const profile = await createProfile(app, "Remote Return");
    profileId = profile.id;
    const profileRoot = path.join(app.dataRoot, "data", "profiles", profileId);
    const data = path.join(profileRoot, "profile", "Default");
    const preferences = path.join(data, "Preferences");
    const history = path.join(data, "History");
    await mkdir(data, { recursive: true });
    await writeFile(preferences, "remote preferences");
    await writeFile(history, "remote history");
    await app.invoke("set_profile_sync_mode", {
      profileId,
      syncMode: "Regular",
    });
    await app.invoke("request_profile_sync", { profileId });
    await waitFor(
      app,
      async () =>
        (await app.invoke("list_browser_profiles")).some(
          (item) => item.id === profileId && item.last_sync != null,
        ),
      "the source profile finishes its upload",
    );
    const manifestKey = `profiles/${profileId}/manifest.json`;
    const originalManifest = await downloadRemote(manifestKey);
    await app.invoke("save_sync_settings", {
      syncServerUrl: proxyUrl,
      syncToken,
    });
    await app.close();

    await writeFile(preferences, "stale local preferences");
    await writeFile(history, "stale local history");
    const later = new Date(Date.now() + 60_000);
    await Promise.all([
      utimes(preferences, later, later),
      utimes(history, later, later),
    ]);
    await mkdir(path.join(profileRoot, ".donut-sync"), { recursive: true });
    await writeFile(
      path.join(profileRoot, ".donut-sync", "resume-state.json"),
      JSON.stringify({
        profile_id: profileId,
        direction: "download",
        started_at: new Date().toISOString(),
        completed_files: [
          "profile/Default/Preferences",
          "profile/Default/History",
        ],
      }),
    );
    await writeFile(
      path.join(app.dataRoot, "data", "settings", "remote_handoff.json"),
      JSON.stringify({
        [profileId]: {
          session_id: "remote-return-session",
          state: "pending_sync",
          observed_at: Math.floor(Date.now() / 1000),
        },
      }),
    );
    await app.start();
    const pending = async () =>
      (await app.invoke("get_remote_handoff_states"))[profileId] ===
      "pending_sync";
    await waitFor(
      app,
      () => missingManifests >= 2,
      "return waits for the remote manifest",
    );
    assert.equal(await pending(), true);
    assert.deepEqual(await downloadRemote(manifestKey), originalManifest);

    mode = "offline";
    await app.invoke("request_profile_sync", { profileId });
    await waitFor(
      app,
      () => failedPulls >= 6,
      "return keeps trying after five failures",
      120_000,
    );
    assert.equal(await pending(), true);

    mode = "partial";
    await waitFor(
      app,
      () => failedFiles >= 3,
      "a non-critical file fails to return",
    );
    assert.equal(await pending(), true);
    assert.deepEqual(await downloadRemote(manifestKey), originalManifest);

    mode = "healthy";
    await waitFor(
      app,
      async () => !(await pending()),
      "return completes without a restart",
      25_000,
    );
    assert.equal(await readFile(preferences, "utf8"), "remote preferences");
    assert.equal(await readFile(history, "utf8"), "remote history");
    assert.deepEqual(await downloadRemote(manifestKey), originalManifest);
  } catch (error) {
    await app.capture("failure");
    throw error;
  } finally {
    await app.close();
    proxy.closeAllConnections();
    await new Promise((resolve) => proxy.close(resolve));
  }
});

test("two real app devices reconcile profile files and every config entity with last-write-wins", async () => {
  assert.ok(syncUrl && syncToken, "Sync infrastructure was not started");
  const deviceA = appFromEnvironment("sync-regular-a");
  const deviceB = appFromEnvironment("sync-regular-b");
  try {
    await Promise.all([deviceA.start(), deviceB.start()]);
    await Promise.all([configureSync(deviceA), configureSync(deviceB)]);

    const group = await deviceA.invoke("create_profile_group", {
      name: "Synced Group A",
    });
    const proxy = await deviceA.invoke("create_stored_proxy", {
      name: "Synced Proxy A",
      proxySettings: {
        proxy_type: "http",
        host: "127.0.0.1",
        port: 8089,
        username: null,
        password: null,
      },
    });
    const vpn = await deviceA.invoke("create_vpn_config_manual", {
      name: "Synced VPN A",
      vpnType: "WireGuard",
      configData: wireGuardFixture(),
    });
    const extension = await deviceA.invoke("add_extension", {
      name: "Synced Extension A",
      fileName: "synced-fixture.zip",
      fileData: [...Buffer.from(extensionZipBase64(), "base64")],
    });
    const extensionGroup = await deviceA.invoke("create_extension_group", {
      name: "Synced Extension Group A",
    });
    await deviceA.invoke("add_extension_to_group", {
      groupId: extensionGroup.id,
      extensionId: extension.id,
    });

    await Promise.all([
      deviceA.invoke("set_group_sync_enabled", {
        groupId: group.id,
        enabled: true,
      }),
      deviceA.invoke("set_proxy_sync_enabled", {
        proxyId: proxy.id,
        enabled: true,
      }),
      deviceA.invoke("set_vpn_sync_enabled", { vpnId: vpn.id, enabled: true }),
      deviceA.invoke("set_extension_sync_enabled", {
        extensionId: extension.id,
        enabled: true,
      }),
      deviceA.invoke("set_extension_group_sync_enabled", {
        extensionGroupId: extensionGroup.id,
        enabled: true,
      }),
    ]);

    const profile = await createProfile(deviceA, "Synced Profile A");
    const profileData = path.join(
      deviceA.dataRoot,
      "data",
      "profiles",
      profile.id,
      "profile",
      "Default",
    );
    await mkdir(profileData, { recursive: true });
    await writeFile(
      path.join(profileData, "Preferences"),
      JSON.stringify({ donutE2E: "regular-profile-payload" }),
    );
    await deviceA.invoke("update_profile_tags", {
      profileId: profile.id,
      tags: ["sync", "device-a"],
    });
    await deviceA.invoke("update_profile_note", {
      profileId: profile.id,
      note: "regular sync metadata",
    });
    await deviceA.invoke("set_profile_sync_mode", {
      profileId: profile.id,
      syncMode: "Regular",
    });
    await deviceA.invoke("request_profile_sync", { profileId: profile.id });
    assert.equal(
      await deviceA.invoke("cancel_profile_sync", {
        profileId: "not-running-sync",
      }),
      false,
    );

    await waitFor(
      deviceA,
      async () => {
        const keys = (await listRemote("")).map((object) => object.key);
        return [
          `groups/${group.id}.json`,
          `proxies/${proxy.id}.json`,
          `vpns/${vpn.id}.json`,
          `extensions/${extension.id}.json`,
          `extension_groups/${extensionGroup.id}.json`,
          `profiles/${profile.id}/manifest.json`,
          `profiles/${profile.id}/files/profile/Default/Preferences`,
        ].every((key) => keys.includes(key));
      },
      "all regular entities uploaded",
    );

    await deviceB.invoke("restart_sync_service");
    await waitFor(
      deviceB,
      async () => {
        const [profiles, groups, proxies, vpns, extensions, extensionGroups] =
          await Promise.all([
            deviceB.invoke("list_browser_profiles"),
            deviceB.invoke("get_profile_groups"),
            deviceB.invoke("get_stored_proxies"),
            deviceB.invoke("list_vpn_configs"),
            deviceB.invoke("list_extensions"),
            deviceB.invoke("list_extension_groups"),
          ]);
        return (
          profiles.some((item) => item.id === profile.id) &&
          groups.some((item) => item.id === group.id) &&
          proxies.some((item) => item.id === proxy.id) &&
          vpns.some((item) => item.id === vpn.id) &&
          extensions.some((item) => item.id === extension.id) &&
          extensionGroups.some((item) => item.id === extensionGroup.id)
        );
      },
      "device B receives every entity",
    );
    const downloadedPreferences = path.join(
      deviceB.dataRoot,
      "data",
      "profiles",
      profile.id,
      "profile",
      "Default",
      "Preferences",
    );
    await waitFor(
      deviceB,
      async () =>
        (
          await readFile(downloadedPreferences, "utf8").catch(() => "")
        ).includes("regular-profile-payload"),
      "device B receives profile browser files",
    );

    // updated_at has one-second resolution. Make the device-B edits
    // unambiguously newer, then verify last-write-wins in both directions.
    await new Promise((resolve) => setTimeout(resolve, 1_100));
    await deviceB.invoke("update_stored_proxy", {
      proxyId: proxy.id,
      name: "Synced Proxy B Wins",
      proxySettings: null,
    });
    await deviceB.invoke("rename_profile", {
      profileId: profile.id,
      newName: "Synced Profile B Wins",
    });
    await deviceB.invoke("request_profile_sync", { profileId: profile.id });
    await deviceA.invoke("restart_sync_service");
    await waitFor(
      deviceA,
      async () => {
        const proxies = await deviceA.invoke("get_stored_proxies");
        const profiles = await deviceA.invoke("list_browser_profiles");
        return (
          proxies.find((item) => item.id === proxy.id)?.name ===
            "Synced Proxy B Wins" &&
          profiles.find((item) => item.id === profile.id)?.name ===
            "Synced Profile B Wins"
        );
      },
      "newer device-B edits win on device A",
    );

    assert.equal(
      await deviceA.invoke("is_proxy_in_use_by_synced_profile", {
        proxyId: proxy.id,
      }),
      false,
    );
    assert.equal(
      await deviceA.invoke("is_group_in_use_by_synced_profile", {
        groupId: group.id,
      }),
      false,
    );
    assert.equal(
      await deviceA.invoke("is_vpn_in_use_by_synced_profile", {
        vpnId: vpn.id,
      }),
      false,
    );
    const counts = await deviceA.invoke("get_unsynced_entity_counts");
    assert.equal(typeof counts.proxies, "number");
    await deviceA.invoke("enable_sync_for_all_entities");

    await Promise.all([
      deviceB.invoke("delete_extension_group", {
        groupId: extensionGroup.id,
      }),
      deviceB.invoke("delete_extension", { extensionId: extension.id }),
      deviceB.invoke("delete_vpn_config", { vpnId: vpn.id }),
      deviceB.invoke("delete_profile_group", { groupId: group.id }),
      deviceB.invoke("delete_stored_proxy", { proxyId: proxy.id }),
      deviceB.invoke("delete_profile", { profileId: profile.id }),
    ]);
    await waitFor(
      deviceB,
      async () => {
        const keys = (await listRemote("")).map((object) => object.key);
        return [
          `tombstones/groups/${group.id}.json`,
          `tombstones/proxies/${proxy.id}.json`,
          `tombstones/vpns/${vpn.id}.json`,
          `tombstones/extensions/${extension.id}.json`,
          `tombstones/extension_groups/${extensionGroup.id}.json`,
          `tombstones/profiles/${profile.id}.json`,
        ].every((key) => keys.includes(key));
      },
      "deletions create every remote tombstone",
    );
    await waitFor(
      deviceA,
      async () => {
        const [profiles, groups, proxies, vpns, extensions, extensionGroups] =
          await Promise.all([
            deviceA.invoke("list_browser_profiles"),
            deviceA.invoke("get_profile_groups"),
            deviceA.invoke("get_stored_proxies"),
            deviceA.invoke("list_vpn_configs"),
            deviceA.invoke("list_extensions"),
            deviceA.invoke("list_extension_groups"),
          ]);
        return (
          !profiles.some((item) => item.id === profile.id) &&
          !groups.some((item) => item.id === group.id) &&
          !proxies.some((item) => item.id === proxy.id) &&
          !vpns.some((item) => item.id === vpn.id) &&
          !extensions.some((item) => item.id === extension.id) &&
          !extensionGroups.some((item) => item.id === extensionGroup.id)
        );
      },
      "remote tombstones delete every entity from device A",
    );
  } catch (error) {
    await Promise.all([deviceA.capture("failure"), deviceB.capture("failure")]);
    throw error;
  } finally {
    await Promise.all([deviceA.close(), deviceB.close()]);
  }
});

test("the first sync of an empty profile publishes a manifest and records completion", async () => {
  const source = appFromEnvironment("sync-empty-source");
  try {
    await source.start();
    await configureSync(source);
    const profile = await createProfile(source, "Empty Profile");
    await source.invoke("set_profile_sync_mode", {
      profileId: profile.id,
      syncMode: "Regular",
    });
    await source.invoke("request_profile_sync", { profileId: profile.id });
    const manifestKey = `profiles/${profile.id}/manifest.json`;
    await waitFor(
      source,
      async () => {
        const profiles = await source.invoke("list_browser_profiles");
        return (
          profiles.find((item) => item.id === profile.id)?.last_sync > 0 &&
          (await listRemote(`profiles/${profile.id}/`)).some(
            (item) => item.key === manifestKey,
          )
        );
      },
      "empty profile has a remote manifest and a completed sync",
    );
    const manifest = JSON.parse(
      (await downloadRemote(manifestKey)).toString("utf8"),
    );
    assert.deepEqual(manifest.files, []);
  } catch (error) {
    await source.capture("failure");
    throw error;
  } finally {
    await source.close();
  }
});

test("a restore point keeps a profile's files and puts them back on every device", async () => {
  const app = appFromEnvironment("sync-restore-points");
  try {
    await app.start();
    await configureSync(app);
    const profile = await createProfile(app, "Restore Point Profile");
    const data = path.join(
      app.dataRoot,
      "data",
      "profiles",
      profile.id,
      "profile",
      "Default",
    );
    await mkdir(data, { recursive: true });
    const preferences = path.join(data, "Preferences");
    await writeFile(preferences, "kept preferences");
    await app.invoke("set_profile_sync_mode", {
      profileId: profile.id,
      syncMode: "Regular",
    });
    const synced = async () =>
      (await app.invoke("list_browser_profiles")).find(
        (item) => item.id === profile.id,
      )?.last_sync;
    await app.invoke("request_profile_sync", { profileId: profile.id });
    await waitFor(
      app,
      async () => (await synced()) > 0,
      "the first sync of the profile",
    );

    const point = await app.invoke("create_restore_point", {
      profileId: profile.id,
    });
    assert.equal(point.kind, "manual");
    assert.ok(point.files >= 1, JSON.stringify(point));
    const listed = await app.invoke("list_restore_points", {
      profileId: profile.id,
    });
    assert.ok(
      listed.some((item) => item.id === point.id),
      JSON.stringify(listed),
    );

    // A change after the point, synced up.
    const before = await synced();
    await new Promise((resolve) => setTimeout(resolve, 1_100));
    await writeFile(preferences, "changed preferences");
    await app.invoke("request_profile_sync", { profileId: profile.id });
    await waitFor(
      app,
      async () => (await synced()) > before,
      "the changed profile synced",
    );

    await app.invoke("restore_restore_point", {
      profileId: profile.id,
      id: point.id,
    });
    assert.equal(await readFile(preferences, "utf8"), "kept preferences");
    const remoteManifest = JSON.parse(
      (await downloadRemote(`profiles/${profile.id}/manifest.json`)).toString(
        "utf8",
      ),
    );
    assert.ok(
      remoteManifest.files.some((file) => file.path.endsWith("Preferences")),
    );
    // The data the restore replaced is a restore point of its own.
    const after = await app.invoke("list_restore_points", {
      profileId: profile.id,
    });
    assert.equal(after.length, listed.length + 1);

    await app.invoke("delete_restore_point", {
      profileId: profile.id,
      id: point.id,
    });
    assert.equal(
      (await app.invoke("list_restore_points", { profileId: profile.id })).some(
        (item) => item.id === point.id,
      ),
      false,
    );
  } catch (error) {
    await app.capture("failure");
    throw error;
  } finally {
    await app.close();
  }
});

test("global config sealing and encrypted profile sync reject a wrong password, round-trip with the right one, and roll over", async () => {
  const source = appFromEnvironment("sync-encrypted-source");
  const receiver = appFromEnvironment("sync-encrypted-receiver");
  const rolloverReceiver = appFromEnvironment(
    "sync-encrypted-rollover-receiver",
  );
  try {
    await Promise.all([source.start(), receiver.start()]);
    await Promise.all([configureSync(source), configureSync(receiver)]);
    await source.invoke("set_e2e_password", {
      password: "shared encryption password",
    });
    await receiver.invoke("set_e2e_password", {
      password: "intentionally wrong password",
    });
    assert.equal(await source.invoke("check_has_e2e_password"), true);
    assert.equal(
      await source.invoke("verify_e2e_password", {
        password: "shared encryption password",
      }),
      true,
    );
    assert.equal(
      await source.invoke("verify_e2e_password", { password: "wrong" }),
      false,
    );

    const sealedProxy = await source.invoke("create_stored_proxy", {
      name: "SECRET-CONFIG-MARKER",
      proxySettings: {
        proxy_type: "http",
        host: "secret-proxy.invalid",
        port: 8443,
        username: "secret-user",
        password: "secret-password",
      },
    });
    await source.invoke("set_proxy_sync_enabled", {
      proxyId: sealedProxy.id,
      enabled: true,
    });

    const encryptedProfile = await createProfile(source, "Encrypted Profile");
    const encryptedData = path.join(
      source.dataRoot,
      "data",
      "profiles",
      encryptedProfile.id,
      "profile",
    );
    await mkdir(encryptedData, { recursive: true });
    await writeFile(
      path.join(encryptedData, "Local State"),
      "SECRET-PROFILE-MARKER that must never appear remotely",
    );
    await source.invoke("set_profile_sync_mode", {
      profileId: encryptedProfile.id,
      syncMode: "Encrypted",
    });
    await source.invoke("request_profile_sync", {
      profileId: encryptedProfile.id,
    });

    const proxyKey = `proxies/${sealedProxy.id}.json`;
    const profileMetadataKey = `profiles/${encryptedProfile.id}/metadata.json`;
    const profileFileKey = `profiles/${encryptedProfile.id}/files/profile/Local State`;
    await waitFor(
      source,
      async () => {
        const keys = (await listRemote("")).map((object) => object.key);
        return (
          keys.includes(proxyKey) &&
          keys.includes(profileMetadataKey) &&
          keys.includes(profileFileKey)
        );
      },
      "sealed config and encrypted profile uploaded",
    );
    const sealedBefore = await downloadRemote(proxyKey);
    const metadataBefore = await downloadRemote(profileMetadataKey);
    const encryptedFile = await downloadRemote(profileFileKey);
    assert.equal(
      sealedBefore.includes(Buffer.from("SECRET-CONFIG-MARKER")),
      false,
    );
    assert.equal(sealedBefore.includes(Buffer.from("secret-password")), false);
    assert.equal(
      encryptedFile.includes(Buffer.from("SECRET-PROFILE-MARKER")),
      false,
    );
    const envelope = JSON.parse(sealedBefore.toString("utf8"));
    assert.equal(envelope.v, 1);
    assert.ok(envelope.salt && envelope.ct);

    await receiver.invoke("restart_sync_service");
    await new Promise((resolve) => setTimeout(resolve, 2_000));
    assert.equal(
      (await receiver.invoke("get_stored_proxies")).some(
        (item) => item.id === sealedProxy.id,
      ),
      false,
      "wrong password must not materialize sealed config",
    );
    assert.equal(
      (await receiver.invoke("list_browser_profiles")).some(
        (item) => item.id === encryptedProfile.id,
      ),
      false,
      "wrong password must not materialize encrypted profiles",
    );

    await receiver.invoke("set_e2e_password", {
      password: "shared encryption password",
    });
    await receiver.invoke("restart_sync_service");
    await waitFor(
      receiver,
      async () =>
        (await receiver.invoke("get_stored_proxies")).some(
          (item) =>
            item.id === sealedProxy.id && item.name === "SECRET-CONFIG-MARKER",
        ) &&
        (await receiver.invoke("list_browser_profiles")).some(
          (item) => item.id === encryptedProfile.id,
        ),
      "correct password decrypts config and profile metadata",
    );
    const receiverFile = path.join(
      receiver.dataRoot,
      "data",
      "profiles",
      encryptedProfile.id,
      "profile",
      "Local State",
    );
    await waitFor(
      receiver,
      async () =>
        (await readFile(receiverFile, "utf8").catch(() => "")).includes(
          "SECRET-PROFILE-MARKER",
        ),
      "correct password decrypts profile browser file",
    );

    const emptyProfile = await createProfile(source, "Encrypted Empty Profile");
    await source.invoke("set_profile_sync_mode", {
      profileId: emptyProfile.id,
      syncMode: "Encrypted",
    });
    await waitFor(
      source,
      async () =>
        (await listRemote(`profiles/${emptyProfile.id}/`)).some(
          (object) =>
            object.key === `profiles/${emptyProfile.id}/metadata.json`,
        ),
      "empty profile metadata uploaded before rollover",
    );

    await source.invoke("set_e2e_password", {
      password: "rolled encryption password",
    });
    let rollingOver = true;
    let manifestDisappeared = false;
    await Promise.all([
      source.invoke("rollover_encryption_for_all_entities").finally(() => {
        rollingOver = false;
      }),
      (async () => {
        while (rollingOver) {
          const objects = await listRemote(`profiles/${encryptedProfile.id}/`);
          manifestDisappeared ||= !objects.some(
            (object) =>
              object.key === `profiles/${encryptedProfile.id}/manifest.json`,
          );
          if (rollingOver) {
            await new Promise((resolve) => setTimeout(resolve, 50));
          }
        }
      })(),
    ]);
    assert.equal(
      manifestDisappeared,
      false,
      "rollover must not let another device interpret a missing manifest as an empty remote profile",
    );
    assert.ok(
      (await listRemote(`profiles/${emptyProfile.id}/`)).some(
        (object) => object.key === `profiles/${emptyProfile.id}/manifest.json`,
      ),
      "rollover must publish a manifest even for an empty profile",
    );
    await waitFor(
      source,
      async () => {
        const [proxy, metadata] = await Promise.all([
          downloadRemote(proxyKey),
          downloadRemote(profileMetadataKey),
        ]);
        return !proxy.equals(sealedBefore) && !metadata.equals(metadataBefore);
      },
      "password rollover rewrites sealed config and profile metadata",
    );
    const sealedAfter = await downloadRemote(proxyKey);
    assert.equal(
      sealedAfter.includes(Buffer.from("SECRET-CONFIG-MARKER")),
      false,
    );
    await receiver.invoke("set_e2e_password", {
      password: "rolled encryption password",
    });
    await receiver.invoke("restart_sync_service");
    await waitFor(
      receiver,
      async () =>
        (await receiver.invoke("get_stored_proxies")).some(
          (item) =>
            item.id === sealedProxy.id && item.name === "SECRET-CONFIG-MARKER",
        ),
      "receiver accepts rolled password",
    );

    await rolloverReceiver.start();
    await rolloverReceiver.invoke("set_e2e_password", {
      password: "rolled encryption password",
    });
    await configureSync(rolloverReceiver);
    await waitFor(
      rolloverReceiver,
      async () =>
        (await rolloverReceiver.invoke("get_stored_proxies")).some(
          (item) =>
            item.id === sealedProxy.id && item.name === "SECRET-CONFIG-MARKER",
        ) &&
        (await rolloverReceiver.invoke("list_browser_profiles")).some(
          (item) => item.id === encryptedProfile.id,
        ),
      "fresh receiver decrypts rolled config and profile metadata",
    );
    const rolloverFile = path.join(
      rolloverReceiver.dataRoot,
      "data",
      "profiles",
      encryptedProfile.id,
      "profile",
      "Local State",
    );
    await waitFor(
      rolloverReceiver,
      async () =>
        (await readFile(rolloverFile, "utf8").catch(() => "")).includes(
          "SECRET-PROFILE-MARKER",
        ),
      "fresh receiver decrypts rolled profile browser file",
    );

    await source.invoke("set_profile_sync_mode", {
      profileId: encryptedProfile.id,
      syncMode: "Disabled",
    });
    await source.invoke("set_profile_sync_mode", {
      profileId: emptyProfile.id,
      syncMode: "Disabled",
    });
    await source.invoke("delete_e2e_password");
    assert.equal(await source.invoke("check_has_e2e_password"), false);
    const missingPassword = await source.invokeError("verify_e2e_password", {
      password: "rolled encryption password",
    });
    assert.match(missingPassword, /NO_E2E_PASSWORD_SET/);
  } catch (error) {
    await Promise.all([
      source.capture("failure"),
      receiver.capture("failure"),
      rolloverReceiver.capture("failure"),
    ]);
    throw error;
  } finally {
    await Promise.all([
      source.close(),
      receiver.close(),
      rolloverReceiver.close(),
    ]);
  }
});

test("a synced profile restored from the trash keeps its sync, and a delete made offline is not undone by the next sync", async () => {
  assert.ok(syncUrl && syncToken, "Sync infrastructure was not started");
  const app = appFromEnvironment("sync-trash");
  try {
    await app.start();
    await configureSync(app);

    const remoteHas = async (key) =>
      (await listRemote(key)).some((object) => object.key === key);
    const manifestKey = (id) => `profiles/${id}/manifest.json`;
    const tombstoneKey = (id) => `tombstones/profiles/${id}.json`;
    const isLive = async (id) =>
      (await app.invoke("list_browser_profiles")).some(
        (profile) => profile.id === id,
      );
    const pendingFile = path.join(
      app.dataRoot,
      "data",
      "pending_profile_deletes.json",
    );
    // The pipeline logs this once its reconcile at sync start has finished.
    const logDir = path.join(app.dataRoot, "logs");
    const pipelineStarts = async () => {
      let count = 0;
      for (const name of await readdir(logDir)) {
        if (!name.endsWith(".log")) continue;
        const text = await readFile(path.join(logDir, name), "utf8");
        count += text.split("Sync scheduler started").length - 1;
      }
      return count;
    };
    const restartSync = async (description) => {
      const before = await pipelineStarts();
      await app.invoke("restart_sync_service");
      await waitFor(
        app,
        async () => (await pipelineStarts()) > before,
        description,
      );
    };
    const syncedProfile = async (name) => {
      const profile = await createProfile(app, name);
      const data = path.join(
        app.dataRoot,
        "data",
        "profiles",
        profile.id,
        "profile",
        "Default",
      );
      await mkdir(data, { recursive: true });
      await writeFile(path.join(data, "Preferences"), JSON.stringify({ name }));
      await app.invoke("set_profile_sync_mode", {
        profileId: profile.id,
        syncMode: "Regular",
      });
      await app.invoke("request_profile_sync", { profileId: profile.id });
      await waitFor(
        app,
        () => remoteHas(manifestKey(profile.id)),
        `${name} uploaded`,
      );
      return profile;
    };

    // Restored at once, while the cloud delete may still be running. The
    // restore waits for that delete and clears its tombstone before sync is
    // back on, so nothing can erase the restored profile afterwards.
    const kept = await syncedProfile("Trash Round Trip");
    await app.invoke("delete_profile", { profileId: kept.id });
    const [entry] = await app.invoke("list_trashed_profiles");
    assert.equal(entry.id, kept.id);
    assert.equal(entry.sync_enabled, true);
    const restored = await app.invoke("restore_trashed_profile", {
      profileId: kept.id,
    });
    assert.equal(restored.sync_mode, "Regular");
    assert.equal(
      await remoteHas(tombstoneKey(kept.id)),
      false,
      "the restore clears the tombstone of the delete",
    );
    await waitFor(
      app,
      () => remoteHas(manifestKey(kept.id)),
      "the restored profile uploads again",
    );
    await restartSync("the reconcile after the restore finishes");
    assert.equal(
      await isLive(kept.id),
      true,
      "the reconcile at sync start keeps the restored profile",
    );

    // Deleted while the server cannot be reached: the delete is owed, and the
    // next sync start carries it out instead of downloading the profile back.
    const offline = await syncedProfile("Deleted Offline");
    await app.invoke("save_sync_settings", {
      syncServerUrl: "http://127.0.0.1:9",
      syncToken,
    });
    await app.invoke("delete_profile", { profileId: offline.id });
    await waitFor(
      app,
      async () =>
        JSON.parse(await readFile(pendingFile, "utf8")).some(
          (pending) => pending.profile_id === offline.id,
        ),
      "the unreachable delete is recorded",
    );
    assert.equal(await remoteHas(manifestKey(offline.id)), true);

    await app.invoke("save_sync_settings", {
      syncServerUrl: syncUrl,
      syncToken,
    });
    await restartSync("the reconcile with the owed delete finishes");
    assert.equal(await remoteHas(tombstoneKey(offline.id)), true);
    assert.equal(await remoteHas(manifestKey(offline.id)), false);
    assert.equal(
      await isLive(offline.id),
      false,
      "the profile deleted offline does not come back",
    );
    assert.deepEqual(
      (await app.invoke("list_trashed_profiles")).map((item) => item.id),
      [offline.id],
    );
    await assert.rejects(readFile(pendingFile, "utf8"), { code: "ENOENT" });
  } catch (error) {
    await app.capture("failure");
    throw error;
  } finally {
    await app.close();
  }
});

// A self-hosted server reaches its storage over an address only it can
// resolve — the documented compose file points S3_ENDPOINT at
// http://minio:9000, a Docker service name that exists on the compose network
// and nowhere else. Files never travel through the sync server, so every
// presigned URL then names a host the desktop cannot open: /health and /readyz
// stay green while every single transfer dies at connect. Reported as "the
// endpoint connection works every time, but no MB is ever synced".
test("the connection check fails a server whose storage host this device cannot reach", async () => {
  assert.ok(syncUrl && syncToken, "Sync infrastructure was not started");
  const app = appFromEnvironment("sync-preflight");

  // Answers exactly like a healthy self-hosted server that signs presigned
  // URLs against a container-only host.
  const misconfigured = createServer((request, response) => {
    if (request.url === "/readyz") {
      response.writeHead(200, { "content-type": "application/json" });
      response.end(
        JSON.stringify({
          status: "ready",
          s3: true,
          storageEndpoint: "http://minio.invalid:9000",
        }),
      );
      return;
    }
    response.writeHead(404);
    response.end();
  });
  await new Promise((resolve) => misconfigured.listen(0, "127.0.0.1", resolve));
  const misconfiguredUrl = `http://127.0.0.1:${misconfigured.address().port}`;

  try {
    await app.start();

    const healthy = await app.invoke("check_sync_server_connection", {
      serverUrl: syncUrl,
    });
    assert.equal(healthy.server_reachable, true, "real sync server answers");
    assert.notEqual(
      healthy.storage_reachable,
      false,
      "the suite's own storage must be reachable from the test device",
    );

    // The regression itself: green server, storage nobody here can open.
    const broken = await app.invoke("check_sync_server_connection", {
      serverUrl: misconfiguredUrl,
    });
    assert.equal(broken.server_reachable, true, "server itself answered");
    assert.equal(broken.storage_ready, true, "server reaches its own storage");
    assert.equal(broken.storage_endpoint, "http://minio.invalid:9000");
    assert.equal(
      broken.storage_reachable,
      false,
      "an unreachable storage host must not report as a working connection",
    );
    assert.ok(
      broken.storage_error && broken.storage_error.length > 0,
      "the failure must carry a cause",
    );
    assert.notEqual(
      broken.storage_error,
      "error sending request",
      "the cause must name the transport failure, not the bare reqwest text",
    );

    // A server that does not answer at all stays a plain connection failure,
    // so the two are never confused in the UI.
    const dead = await app.invoke("check_sync_server_connection", {
      serverUrl: "http://127.0.0.1:1",
    });
    assert.equal(dead.server_reachable, false);
    assert.equal(dead.storage_reachable, null);
  } catch (error) {
    await app.capture("failure");
    throw error;
  } finally {
    await new Promise((resolve) => misconfigured.close(resolve));
    await app.close();
  }
});