import { test } from 'node:test';
import assert from 'node:assert/strict';
import { createRequire } from 'node:module';
import { mkdirSync, rmSync, writeFileSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import Module from 'node:module';

const require = createRequire(import.meta.url);

async function loadMainForWindowFlags(flags) {
  const originalArgv = process.argv;
  const originalHome = process.env.HOME;
  const originalLoad = Module._load;
  const mainPath = require.resolve('../app/main.js');
  const home = join(tmpdir(), `obelisk-window-flags-${Date.now()}-${Math.random()}`);
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(home, '.obelisk', 'obelisk.sqlite'), '');
  delete require.cache[mainPath];
  process.env.HOME = home;
  process.argv = [originalArgv[0] || 'node', originalArgv[1] || 'electron', ...flags];

  const windows = [];

  class FakeDatabase {
    pragma() {}
    close() {}
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor(options) {
      this.options = options;
      this.loadedURL = null;
      this.loadedFile = null;
      this.devToolsOpened = false;
      this.webContents = {
        on() {},
        setZoomLevel() {},
        openDevTools: () => { this.devToolsOpened = true; },
        send() {},
      };
      windows.push(this);
    }
    loadFile(filePath) { this.loadedFile = filePath; }
    loadURL(url) { this.loadedURL = url; return Promise.resolve(); }
    close() {}
    static getAllWindows() { return windows; }
    static fromWebContents() { return null; }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: { handle() {} },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() {},
          stop() {},
          idle: async () => {},
          runBuildNow() { return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async () => ({ files: 0, affectedSessionIds: [] }),
          stop() {},
        }),
      };
    }
    if (request === 'chokidar') {
      return { watch: () => ({ on() { return this; }, close() {} }) };
    }
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));
    return windows;
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.argv = originalArgv;
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
}

test('dev mode does not open DevTools unless explicitly requested', async () => {
  const packagedWindows = await loadMainForWindowFlags([]);
  assert.equal(packagedWindows.length, 1);
  assert.equal(packagedWindows[0].loadedURL, null);
  assert.equal(packagedWindows[0].options.webPreferences.devTools, false);
  assert.equal(packagedWindows[0].devToolsOpened, false);

  const devWindows = await loadMainForWindowFlags(['--dev']);
  assert.equal(devWindows.length, 1);
  assert.equal(devWindows[0].loadedURL, 'http://localhost:5173');
  assert.equal(devWindows[0].options.webPreferences.devTools, true);
  assert.equal(devWindows[0].devToolsOpened, false);

  const devtoolsWindows = await loadMainForWindowFlags(['--dev', '--devtools']);
  assert.equal(devtoolsWindows.length, 1);
  assert.equal(devtoolsWindows[0].loadedURL, 'http://localhost:5173');
  assert.equal(devtoolsWindows[0].devToolsOpened, true);
});

test('main process watches Codex sessions directory instead of Codex root', async () => {
  const originalLoad = Module._load;
  const originalHome = process.env.HOME;
  const home = join(tmpdir(), `obelisk-main-watch-dirs-${Date.now()}`);
  const claudeDir = join(home, '.claude');
  const codexDir = join(home, '.codex');
  mkdirSync(join(claudeDir, 'projects'), { recursive: true });
  mkdirSync(join(codexDir, 'sessions'), { recursive: true });
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(home, '.obelisk', 'obelisk.sqlite'), '');
  process.env.HOME = home;

  const serviceOptions = [];
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeDatabase {
    pragma() {}
    close() {}
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = { on() {}, setZoomLevel() {}, openDevTools() {}, send() {} };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() { return []; }
    static fromWebContents() { return null; }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: { handle() {} },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: (options) => {
          serviceOptions.push(options);
          return {
            start() {},
            stop() {},
            idle: async () => {},
            runBuildNow() { return Promise.resolve(); },
          };
        },
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async () => ({ files: 0, affectedSessionIds: [] }),
          stop() {},
        }),
      };
    }
    if (request === 'chokidar') return { watch: () => ({ on() { return this; }, close() {} }) };
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    assert.equal(serviceOptions.length, 1);
    assert.deepEqual(serviceOptions[0].watchDirs, [
      join(claudeDir, 'projects'),
      join(codexDir, 'sessions'),
    ]);
    assert.equal(serviceOptions[0].watchDirs.includes(codexDir), false);
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});

test('session IPC hides Codex rows by default and supports explicit source opt-in', async () => {
  const originalLoad = Module._load;
  const originalHome = process.env.HOME;
  const home = join(tmpdir(), `obelisk-main-source-filter-${Date.now()}`);
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(home, '.obelisk', 'obelisk.sqlite'), '');
  process.env.HOME = home;

  const ipcHandlers = new Map();
  const queries = [];
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeDatabase {
    pragma() {}
    close() {}
    prepare(sql) {
      return {
        all: (...params) => {
          queries.push({ sql, params });
          return [];
        },
        get: (...params) => {
          queries.push({ sql, params });
          return null;
        },
        run: () => ({}),
      };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = { on() {}, setZoomLevel() {}, openDevTools() {}, send() {} };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() { return []; }
    static fromWebContents() { return null; }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: {
          handle(channel, handler) {
            ipcHandlers.set(channel, handler);
          },
        },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() {},
          stop() {},
          idle: async () => {},
          runBuildNow() { return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async () => ({ files: 0, affectedSessionIds: [] }),
          stop() {},
        }),
      };
    }
    if (request === 'chokidar') return { watch: () => ({ on() { return this; }, close() {} }) };
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    ipcHandlers.get('db:getSessions')(null, {});
    assert.match(queries.at(-1).sql, /COALESCE\(source, 'claude'\) = 'claude'/);

    ipcHandlers.get('db:getProjects')(null, {});
    assert.match(queries.at(-1).sql, /COALESCE\(source, 'claude'\) = 'claude'/);

    ipcHandlers.get('db:getSessions')(null, { includeCodex: true });
    assert.doesNotMatch(queries.at(-1).sql, /COALESCE\(source, 'claude'\) = 'claude'/);

    ipcHandlers.get('db:getSessions')(null, { source: 'codex' });
    assert.match(queries.at(-1).sql, /COALESCE\(source, 'claude'\) = \?/);
    assert.ok(queries.at(-1).params.includes('codex'));

    await ipcHandlers.get('settings:get')();
    assert.ok(
      queries.some(q => /COUNT\(\*\) as c FROM sessions WHERE COALESCE\(source, 'claude'\) = 'claude'/.test(q.sql)),
    );
    assert.ok(
      queries.some(q => /MAX\(started_at\) as t FROM sessions WHERE COALESCE\(source, 'claude'\) = 'claude'/.test(q.sql)),
    );
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});

test('main process migrates an existing app database before source-filtered IPC queries', async () => {
  const originalLoad = Module._load;
  const originalHome = process.env.HOME;
  const home = join(tmpdir(), `obelisk-main-db-migration-${Date.now()}`);
  const obeliskDir = join(home, '.obelisk');
  mkdirSync(obeliskDir, { recursive: true });
  process.env.HOME = home;

  const { DatabaseSync } = require('node:sqlite');
  const dbPath = join(obeliskDir, 'obelisk.sqlite');
  const legacy = new DatabaseSync(dbPath);
  legacy.exec(`
    CREATE TABLE sessions (
      id TEXT PRIMARY KEY, title TEXT, project TEXT, project_path TEXT,
      started_at TEXT, ended_at TEXT, git_branch TEXT, version TEXT,
      message_count INTEGER DEFAULT 0, jsonl_path TEXT
    );
    CREATE TABLE messages (
      uuid TEXT PRIMARY KEY, session_id TEXT, type TEXT, parent_uuid TEXT,
      timestamp TEXT, role TEXT, text TEXT, content_type TEXT,
      is_meta INTEGER DEFAULT 0, model TEXT,
      is_sidechain INTEGER DEFAULT 0, agent_id TEXT,
      input_tokens INTEGER, output_tokens INTEGER,
      cwd TEXT, skill TEXT, turn_duration_ms INTEGER
    );
    CREATE TABLE memories (
      id TEXT PRIMARY KEY, session_id TEXT, project TEXT,
      message_start TEXT, message_end TEXT,
      path TEXT, anchors TEXT, summary TEXT, created_at TEXT,
      deleted_at TEXT, deleted_reason TEXT
    );
    INSERT INTO sessions (id, title, project, started_at, message_count)
    VALUES ('legacy-session', 'Legacy session', 'quiet-zero', '2026-06-10T10:00:00Z', 1);
  `);
  legacy.close();

  const ipcHandlers = new Map();
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeBrowserWindow {
    constructor() {
      this.webContents = { on() {}, setZoomLevel() {}, openDevTools() {}, send() {} };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() { return []; }
    static fromWebContents() { return null; }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: {
          handle(channel, handler) {
            ipcHandlers.set(channel, handler);
          },
        },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') {
      return class SqliteCompatDatabase {
        constructor(dbFile) {
          this.db = new DatabaseSync(dbFile);
        }
        pragma(statement) {
          this.db.exec(`PRAGMA ${statement}`);
        }
        exec(sql) {
          return this.db.exec(sql);
        }
        close() {
          return this.db.close();
        }
        prepare(sql) {
          const stmt = this.db.prepare(sql);
          return {
            all: (...params) => stmt.all(...params),
            get: (...params) => stmt.get(...params),
            run: (...params) => stmt.run(...params),
          };
        }
      };
    }
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() {},
          stop() {},
          idle: async () => {},
          runBuildNow() { return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async () => ({ files: 0, affectedSessionIds: [] }),
          stop() {},
        }),
      };
    }
    if (request === 'chokidar') return { watch: () => ({ on() { return this; }, close() {} }) };
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    const sessions = ipcHandlers.get('db:getSessions')(null, {});
    assert.equal(sessions[0].id, 'legacy-session');
    assert.equal(sessions[0].source, 'claude');
    assert.deepEqual(ipcHandlers.get('db:getStats')(null, {}), {
      sessions: 1,
      memories: 0,
      memoriesArchived: 0,
    });
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});

test('closing the last macOS window releases background resources until activation', async () => {
  const originalLoad = Module._load;
  const originalPlatform = Object.getOwnPropertyDescriptor(process, 'platform');
  const originalHome = process.env.HOME;
  const home = join(tmpdir(), `obelisk-main-window-${Date.now()}`);
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(home, '.obelisk', 'obelisk.sqlite'), '');
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];
  process.env.HOME = home;
  Object.defineProperty(process, 'platform', { value: 'darwin' });

  const appHandlers = new Map();
  const serviceEvents = [];
  const workers = [];
  const watchers = [];
  const windows = [];
  let quitCalled = false;

  class FakeDatabase {
    pragma() {}
    close() { serviceEvents.push('db-close'); }
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = { on() {}, setZoomLevel() {}, openDevTools() {}, send() {} };
      windows.push(this);
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() { return windows; }
    static fromWebContents() { return null; }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on(event, handler) { appHandlers.set(event, handler); },
          quit() { quitCalled = true; },
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: { handle() {} },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() { serviceEvents.push('service-start'); },
          stop() { serviceEvents.push('service-stop'); },
          idle: async () => { serviceEvents.push('service-idle'); },
          runBuildNow() { serviceEvents.push('service-build'); return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => {
          const worker = { stop() { serviceEvents.push('worker-stop'); } };
          workers.push(worker);
          return worker;
        },
      };
    }
    if (request === 'chokidar') {
      return {
        watch: () => {
          const watcher = { on() { return this; }, close() { serviceEvents.push('watcher-close'); } };
          watchers.push(watcher);
          return watcher;
        },
      };
    }
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    assert.equal(windows.length, 1);
    assert.equal(workers.length, 1);
    assert.equal(watchers.length, 1);

    windows.length = 0;
    appHandlers.get('window-all-closed')();
    await new Promise(resolve => setImmediate(resolve));

    assert.equal(quitCalled, false);
    assert.ok(serviceEvents.includes('service-stop'));
    assert.ok(serviceEvents.includes('worker-stop'));
    assert.ok(serviceEvents.includes('watcher-close'));
    assert.ok(serviceEvents.includes('db-close'));

    appHandlers.get('activate')();
    await new Promise(resolve => setImmediate(resolve));

    assert.equal(windows.length, 1);
    assert.equal(workers.length, 2);
    assert.equal(watchers.length, 2);
    assert.equal(serviceEvents.filter(e => e === 'service-start').length, 2);
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    if (originalPlatform) Object.defineProperty(process, 'platform', originalPlatform);
    rmSync(home, { recursive: true, force: true });
  }
});

test('settings rebuild reopens the database from the configured Claude path', async () => {
  const home = join(tmpdir(), `obelisk-main-settings-${Date.now()}`);
  const defaultClaudeDir = join(home, '.claude');
  const customClaudeDir = join(home, 'custom-claude');
  const customCodexDir = join(home, 'custom-codex');
  mkdirSync(defaultClaudeDir, { recursive: true });
  mkdirSync(customClaudeDir, { recursive: true });
  mkdirSync(customCodexDir, { recursive: true });
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(defaultClaudeDir, 'obelisk.sqlite'), '');
  writeFileSync(join(customClaudeDir, 'obelisk.sqlite'), 'legacy custom db');
  writeFileSync(join(home, '.obelisk', 'settings.json'), JSON.stringify({
    claudeDir: customClaudeDir,
    codexDir: customCodexDir,
  }));

  const originalHome = process.env.HOME;
  process.env.HOME = home;

  const ipcHandlers = new Map();
  const openedDbPaths = [];
  const buildCalls = [];
  const serviceEvents = [];
  const originalLoad = Module._load;
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeDatabase {
    constructor(dbPath) {
      openedDbPaths.push(dbPath);
    }
    pragma() {}
    close() {}
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = {
        on() {},
        setZoomLevel() {},
        openDevTools() {},
        send() {},
      };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() {
      return [];
    }
    static fromWebContents() {
      return null;
    }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: {
          handle(channel, handler) {
            ipcHandlers.set(channel, handler);
          },
        },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() { serviceEvents.push('start'); },
          stop() { serviceEvents.push('stop'); },
          idle: async () => { serviceEvents.push('idle'); },
          runBuildNow() { serviceEvents.push('runBuildNow'); return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async (args) => {
            serviceEvents.push('build');
            buildCalls.push(args);
            writeFileSync(args.dbPath, 'rebuilt temp db');
            return { files: 2, affectedSessionIds: ['session-1', 'session-2'] };
          },
          stop() { return Promise.resolve(); },
        }),
      };
    }
    if (request === 'chokidar') {
      return { watch: () => ({ on() { return this; }, close() {} }) };
    }
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    const rebuild = ipcHandlers.get('settings:rebuildIndex');
    assert.equal(typeof rebuild, 'function');
    await rebuild();

    assert.equal(buildCalls.at(-1).claudeDir, customClaudeDir);
    assert.equal(buildCalls.at(-1).projectsDir, join(customClaudeDir, 'projects'));
    assert.equal(buildCalls.at(-1).codexDir, customCodexDir);
    assert.notEqual(buildCalls.at(-1).dbPath, join(home, '.obelisk', 'obelisk.sqlite'));
    assert.equal(buildCalls.at(-1).preserveDbPath, join(home, '.obelisk', 'obelisk.sqlite'));
    assert.equal(openedDbPaths.at(-1), join(home, '.obelisk', 'obelisk.sqlite'));
    assert.equal(
      require('node:fs').readFileSync(join(home, '.obelisk', 'obelisk.sqlite'), 'utf8'),
      'rebuilt temp db',
    );
    assert.ok(serviceEvents.indexOf('build') > serviceEvents.indexOf('stop'));
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});

test('settings rebuild keeps the existing database after a worker failure', async () => {
  const home = join(tmpdir(), `obelisk-main-settings-rebuild-failure-${Date.now()}`);
  const customClaudeDir = join(home, 'custom-claude');
  const customCodexDir = join(home, 'custom-codex');
  mkdirSync(customClaudeDir, { recursive: true });
  mkdirSync(customCodexDir, { recursive: true });
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(customClaudeDir, 'obelisk.sqlite'), 'legacy custom db');
  writeFileSync(join(home, '.obelisk', 'settings.json'), JSON.stringify({
    claudeDir: customClaudeDir,
    codexDir: customCodexDir,
  }));

  const originalHome = process.env.HOME;
  process.env.HOME = home;

  const ipcHandlers = new Map();
  const openedDbPaths = [];
  const closedDbPaths = [];
  const serviceEvents = [];
  const originalLoad = Module._load;
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeDatabase {
    constructor(dbPath) {
      this.dbPath = dbPath;
      openedDbPaths.push(dbPath);
    }
    pragma() {}
    close() { closedDbPaths.push(this.dbPath); }
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = {
        on() {},
        setZoomLevel() {},
        openDevTools() {},
        send() {},
      };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() {
      return [];
    }
    static fromWebContents() {
      return null;
    }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: {
          handle(channel, handler) {
            ipcHandlers.set(channel, handler);
          },
        },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() { serviceEvents.push('start'); },
          stop() { serviceEvents.push('stop'); },
          idle: async () => { serviceEvents.push('idle'); },
          runBuildNow() { serviceEvents.push('runBuildNow'); return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async () => {
            serviceEvents.push('build');
            throw new Error('worker exploded');
          },
          stop() {},
        }),
      };
    }
    if (request === 'chokidar') {
      return { watch: () => ({ on() { return this; }, close() {} }) };
    }
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    const rebuild = ipcHandlers.get('settings:rebuildIndex');
    const openCountBeforeRebuild = openedDbPaths.length;
    await assert.rejects(() => rebuild(), /worker exploded/);

    const expectedDbPath = join(home, '.obelisk', 'obelisk.sqlite');
    assert.equal(openedDbPaths.at(-1), expectedDbPath);
    assert.equal(openedDbPaths.length, openCountBeforeRebuild);
    assert.equal(closedDbPaths.includes(expectedDbPath), false);
    assert.equal(
      require('node:fs').readFileSync(expectedDbPath, 'utf8'),
      'legacy custom db',
    );
    assert.ok(serviceEvents.indexOf('build') > serviceEvents.indexOf('stop'));
    assert.ok(serviceEvents.lastIndexOf('start') > serviceEvents.indexOf('build'));
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});

test('settings rebuild cancels an in-flight background build instead of waiting for it', async () => {
  const home = join(tmpdir(), `obelisk-main-settings-rebuild-cancel-${Date.now()}`);
  const customClaudeDir = join(home, 'custom-claude');
  const customCodexDir = join(home, 'custom-codex');
  mkdirSync(customClaudeDir, { recursive: true });
  mkdirSync(customCodexDir, { recursive: true });
  mkdirSync(join(home, '.obelisk'), { recursive: true });
  writeFileSync(join(customClaudeDir, 'obelisk.sqlite'), 'legacy custom db');
  writeFileSync(join(home, '.obelisk', 'settings.json'), JSON.stringify({
    claudeDir: customClaudeDir,
    codexDir: customCodexDir,
  }));

  const originalHome = process.env.HOME;
  process.env.HOME = home;

  const ipcHandlers = new Map();
  const serviceEvents = [];
  const originalLoad = Module._load;
  const mainPath = require.resolve('../app/main.js');
  delete require.cache[mainPath];

  class FakeDatabase {
    pragma() {}
    close() {}
    prepare() {
      return { get: () => null, all: () => [], run: () => ({}) };
    }
  }

  class FakeBrowserWindow {
    constructor() {
      this.webContents = {
        on() {},
        setZoomLevel() {},
        openDevTools() {},
        send() {},
      };
    }
    loadFile() {}
    loadURL() {}
    close() {}
    static getAllWindows() {
      return [];
    }
    static fromWebContents() {
      return null;
    }
  }

  Module._load = function patchedLoad(request, parent, isMain) {
    if (request === 'electron') {
      return {
        app: {
          whenReady: () => Promise.resolve(),
          on() {},
          quit() {},
        },
        BrowserWindow: FakeBrowserWindow,
        ipcMain: {
          handle(channel, handler) {
            ipcHandlers.set(channel, handler);
          },
        },
        clipboard: {},
        dialog: {},
        nativeImage: {},
      };
    }
    if (request === 'better-sqlite3') return FakeDatabase;
    if (request === './indexer') return { writeHeartbeat() {} };
    if (request === './indexer-service') {
      return {
        createIndexerService: () => ({
          start() { serviceEvents.push('start'); },
          stop() { serviceEvents.push('stop'); },
          idle: async () => new Promise(() => {}),
          runBuildNow() { serviceEvents.push('runBuildNow'); return Promise.resolve(); },
        }),
      };
    }
    if (request === './indexer-worker-client') {
      let buildIndexCalls = 0;
      return {
        createWorkerBuildIndex: () => ({
          buildIndex: async (args) => {
            serviceEvents.push(`build-${++buildIndexCalls}`);
            writeFileSync(args.dbPath, 'rebuilt temp db');
            return { files: 2, affectedSessionIds: [] };
          },
          stop() {
            serviceEvents.push('worker-stop');
            return Promise.resolve();
          },
        }),
      };
    }
    if (request === 'chokidar') {
      return { watch: () => ({ on() { return this; }, close() {} }) };
    }
    return originalLoad.call(this, request, parent, isMain);
  };

  try {
    require('../app/main.js');
    await new Promise(resolve => setImmediate(resolve));

    const rebuild = ipcHandlers.get('settings:rebuildIndex');
    const outcome = await Promise.race([
      rebuild().then(() => 'done'),
      new Promise(resolve => setTimeout(() => resolve('timeout'), 20)),
    ]);

    assert.equal(outcome, 'done');
    assert.ok(serviceEvents.indexOf('worker-stop') > serviceEvents.indexOf('stop'));
    assert.ok(serviceEvents.some(event => event.startsWith('build-')));
  } finally {
    Module._load = originalLoad;
    delete require.cache[mainPath];
    process.env.HOME = originalHome;
    rmSync(home, { recursive: true, force: true });
  }
});