import { app, BrowserWindow, ipcMain, screen, powerSaveBlocker } from 'electron';
import * as path from 'path';
import * as fs from 'fs';
import * as http from 'http';
import { ScreenManager } from './services/ScreenManager';
import { PresenceDetector } from './services/PresenceDetector';
import { FrigateStreamer } from './services/FrigateStreamer';
import { PhotoManager } from './services/PhotoManager';
import { FrigateDetector } from './services/FrigateDetector';

let mainWindow: BrowserWindow | null = null;
let screenManager: ScreenManager | null = null;
let presenceDetector: PresenceDetector | null = null;
let frigateStreamer: FrigateStreamer | null = null;
let photoManager: PhotoManager | null = null;
let frigateDetector: FrigateDetector | null = null;
let powerSaveBlockerId: number | null = null;

// Photos directory: env var PHOTOS_PATH wins, else fall back to ~/Pictures/dashboard
function resolvePhotosDir(): string {
  const env = process.env.PHOTOS_PATH;
  if (env && env.trim()) return env.trim();
  return path.join(app.getPath('home'), 'Pictures', 'dashboard');
}

// Check if we're in dev mode: explicitly set NODE_ENV or running from source with vite dev server
// When running from unpacked folder, app.isPackaged is false but we still want production behavior
const isDev = process.env.NODE_ENV === 'development';

function createWindow(): void {
  const primaryDisplay = screen.getPrimaryDisplay();
  const { width, height } = primaryDisplay.workAreaSize;

  mainWindow = new BrowserWindow({
    width,
    height,
    x: 0,
    y: 0,
    fullscreen: true,
    kiosk: !isDev, // Kiosk mode in production
    frame: false,
    autoHideMenuBar: true,
    backgroundColor: '#faf6f0',
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      nodeIntegration: false,
      contextIsolation: true,
      sandbox: false, // Required for some electron features
    },
  });

  // Load the app
  if (isDev) {
    mainWindow.loadURL('http://localhost:5173');
    mainWindow.webContents.openDevTools({ mode: 'detach' });
  } else {
    // __dirname is dist-electron, so go up one level to reach dist
    mainWindow.loadFile(path.join(__dirname, '../dist/index.html'));
  }

  // Prevent power save mode
  powerSaveBlockerId = powerSaveBlocker.start('prevent-display-sleep');

  // Initialize services
  screenManager = new ScreenManager(mainWindow);

  // Photo frame slideshow source
  photoManager = new PhotoManager(resolvePhotosDir());
  console.log(`PhotoManager: watching ${photoManager.getDir()}`);

  // Frigate person detection via MQTT (bypasses HA entities)
  frigateDetector = new FrigateDetector({
    mqttUrl: 'mqtt://192.168.1.50:1883',
    mqttUser: 'mqtt',
    mqttPassword: '11xpfcryan',
    topicPrefix: 'frigate',
    cameras: ['Front_Porch', 'FPE', 'Porch_Downstairs', 'Driveway_door'],
  });
  frigateDetector.on('personDetected', (camera: string) => {
    console.log(`FrigateDetector: person on ${camera}`);
    mainWindow?.webContents.send('frigate:personDetected', camera);
  });
  frigateDetector.start();

  // Handle window close
  mainWindow.on('closed', () => {
    mainWindow = null;
  });

  // Prevent accidental navigation
  mainWindow.webContents.on('will-navigate', (event) => {
    event.preventDefault();
  });

  // Handle external links
  mainWindow.webContents.setWindowOpenHandler(() => {
    return { action: 'deny' };
  });
}

// IPC handlers
function setupIpcHandlers(): void {
  // Screen management
  ipcMain.handle('screen:wake', async () => {
    await screenManager?.wakeScreen();
    return true;
  });

  ipcMain.handle('screen:sleep', async () => {
    await screenManager?.sleepScreen();
    return true;
  });

  ipcMain.handle('screen:setIdleTimeout', async (_event, timeout: number) => {
    screenManager?.setIdleTimeout(timeout);
    return true;
  });

  // Handle touch/click activity from renderer (for Wayland touch support)
  ipcMain.handle('screen:activity', async () => {
    screenManager?.handleUserActivity();
    return true;
  });

  // Presence detection control
  ipcMain.handle('presence:start', async () => {
    if (!presenceDetector) {
      presenceDetector = new PresenceDetector();
      presenceDetector.on('personDetected', () => {
        mainWindow?.webContents.send('presence:detected');
        screenManager?.wakeScreen();
      });
      presenceDetector.on('noPersonDetected', () => {
        mainWindow?.webContents.send('presence:cleared');
      });
    }
    await presenceDetector.start();
    return true;
  });

  ipcMain.handle('presence:stop', async () => {
    await presenceDetector?.stop();
    return true;
  });

  // Frigate streaming control
  ipcMain.handle('frigate:startStream', async (_event, rtspUrl: string) => {
    if (!frigateStreamer) {
      frigateStreamer = new FrigateStreamer();
    }
    await frigateStreamer.start(rtspUrl);
    return true;
  });

  ipcMain.handle('frigate:stopStream', async () => {
    await frigateStreamer?.stop();
    return true;
  });

  // Config - read stored token from file
  ipcMain.handle('config:getStoredToken', async () => {
    try {
      const tokenPath = path.join(app.getPath('userData'), 'ha_token.txt');
      if (fs.existsSync(tokenPath)) {
        const token = fs.readFileSync(tokenPath, 'utf-8').trim();
        return token || null;
      }
      return null;
    } catch {
      return null;
    }
  });

  // Config - read Jellyfin API key from file
  ipcMain.handle('config:getJellyfinApiKey', async () => {
    try {
      const keyPath = path.join(app.getPath('userData'), 'jellyfin_api_key.txt');
      if (fs.existsSync(keyPath)) {
        const key = fs.readFileSync(keyPath, 'utf-8').trim();
        return key || null;
      }
      return null;
    } catch {
      return null;
    }
  });

  // Photo frame
  ipcMain.handle('photos:list', async () => {
    return photoManager?.list() ?? [];
  });

  ipcMain.handle('photos:getDir', async () => {
    return photoManager?.getDir() ?? '';
  });

  // Given a relative filename returned by photos:list, return an absolute
  // file:// URL the renderer can drop into an <img src>. Returns null if the
  // file is missing or resolves outside the photos dir (traversal guard).
  ipcMain.handle('photos:getUrl', async (_event, rel: string) => {
    const full = photoManager?.resolve(rel);
    if (!full || !fs.existsSync(full)) return null;
    return 'file://' + full.split(path.sep).map((p, i) => (i === 0 && p === '' ? '' : encodeURIComponent(p))).join('/');
  });

  // App control
  ipcMain.handle('app:quit', () => {
    app.quit();
  });

  ipcMain.handle('app:toggleFullscreen', () => {
    if (mainWindow) {
      const isFullScreen = mainWindow.isFullScreen();
      mainWindow.setFullScreen(!isFullScreen);
    }
  });

  ipcMain.handle('app:toggleDevTools', () => {
    if (isDev && mainWindow) {
      mainWindow.webContents.toggleDevTools();
    }
  });
}

// App lifecycle
app.whenReady().then(() => {
  setupIpcHandlers();
  createWindow();

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow();
    }
  });
});

app.on('window-all-closed', () => {
  // Clean up
  if (powerSaveBlockerId !== null) {
    powerSaveBlocker.stop(powerSaveBlockerId);
  }
  presenceDetector?.stop();
  frigateStreamer?.stop();
  frigateDetector?.stop();

  if (process.platform !== 'darwin') {
    app.quit();
  }
});

// Localhost-only HTTP endpoint for self-screenshots. GNOME Wayland blocks
// external screen capture, but webContents.capturePage() works from inside.
// Usage: curl -s http://127.0.0.1:9990/screenshot > out.png
http
  .createServer(async (req, res) => {
    if (req.url === '/screenshot' && mainWindow) {
      try {
        const wc = mainWindow.webContents;
        if (!wc.debugger.isAttached()) wc.debugger.attach('1.3');
        const result = (await wc.debugger.sendCommand('Page.captureScreenshot', {
          format: 'png',
          captureBeyondViewport: false,
        })) as { data: string };
        res.setHeader('Content-Type', 'image/png');
        res.end(Buffer.from(result.data, 'base64'));
      } catch (err) {
        res.statusCode = 500;
        res.end(String(err));
      }
    } else {
      res.statusCode = 404;
      res.end();
    }
  })
  .listen(9990, '127.0.0.1', () => {
    console.log('Screenshot endpoint on http://127.0.0.1:9990/screenshot');
  });

// Handle uncaught exceptions
process.on('uncaughtException', (error) => {
  console.error('Uncaught exception:', error);
});

process.on('unhandledRejection', (reason) => {
  console.error('Unhandled rejection:', reason);
});