const { app, BrowserWindow, ipcMain, shell, Tray, Menu, nativeImage, clipboard, session, desktopCapturer } = require('electron');
const path = require('path');
const fs = require('fs');
const { exec } = require('child_process');
const { promisify } = require('util');
const Store = require('electron-store');
const open = require('open');
const PaarrotAPIServer = require('./api-server');
const https = require('https');
const http = require('http');
const AdmZip = require('adm-zip');
const { autoUpdater } = require('electron-updater');

// Development mode detection - MUST be declared before any code that might use it
const isDev = process.env.NODE_ENV === 'development' || !app.isPackaged;
const VITE_DEV_SERVER = 'http://localhost:38347';
const PORT = 44548;

const execAsync = promisify(exec);
const store = new Store();

let mainWindow = null;
let tray = null;
let isQuitting = false;
let apiServer = null;

// Allow audio playback without requiring a prior user gesture (needed for notification sounds)
app.commandLine.appendSwitch('autoplay-policy', 'no-user-gesture-required');

// Enable GPU acceleration
app.commandLine.appendSwitch('ignore-gpu-blocklist');
app.commandLine.appendSwitch('enable-gpu-rasterization');
app.commandLine.appendSwitch('enable-zero-copy');
app.commandLine.appendSwitch('enable-webgl');
app.commandLine.appendSwitch('enable-accelerated-2d-canvas');

// Set app name for notifications and system tray
app.setName('Paarrot');

// Configure auto-updater
autoUpdater.autoDownload = false;
autoUpdater.autoInstallOnAppQuit = true;

// Set feed URL manually as fallback if app-update.yml is missing
if (!isDev) {
  try {
    autoUpdater.setFeedURL({
      provider: 'github',
      owner: 'Paarrot',
      repo: 'Paarrot-Desktop',
      releaseType: 'release'
    });
  } catch (err) {
    console.warn('Failed to set feed URL:', err);
  }
}

autoUpdater.on('checking-for-update', () => {
  console.log('Checking for updates...');
  if (mainWindow) {
    mainWindow.webContents.send('update-checking');
  }
});

autoUpdater.on('update-available', (info) => {
  console.log('Update available:', info.version);
  if (mainWindow) {
    mainWindow.webContents.send('update-available', {
      version: info.version,
      releaseNotes: info.releaseNotes,
      releaseDate: info.releaseDate
    });
  }
});

autoUpdater.on('update-not-available', (info) => {
  console.log('No update available. Current version:', info.version);
  if (mainWindow) {
    mainWindow.webContents.send('update-not-available', { version: info.version });
  }
});

autoUpdater.on('error', (err) => {
  console.error('Update error:', err);
  if (mainWindow) {
    mainWindow.webContents.send('update-error', { error: err.message });
  }
});

autoUpdater.on('download-progress', (progressObj) => {
  console.log(`Download progress: ${progressObj.percent}%`);
  if (mainWindow) {
    mainWindow.webContents.send('update-download-progress', {
      percent: progressObj.percent,
      transferred: progressObj.transferred,
      total: progressObj.total
    });
  }
});

autoUpdater.on('update-downloaded', (info) => {
  console.log('Update downloaded:', info.version);
  if (mainWindow) {
    mainWindow.webContents.send('update-downloaded', {
      version: info.version,
      releaseNotes: info.releaseNotes
    });
  }
});


// Single instance lock
const gotTheLock = app.requestSingleInstanceLock();

if (!gotTheLock) {
  app.quit();
} else {
  app.on('second-instance', () => {
    // Someone tried to run a second instance, focus our window
    if (mainWindow) {
      if (mainWindow.isMinimized()) mainWindow.restore();
      mainWindow.show();
      mainWindow.focus();
    }
  });
}

// Helper to get correct icon path in dev vs packaged app
function getIconPath(iconName) {
  if (isDev) {
    return path.join(__dirname, '../icons', iconName);
  }
  // In packaged app, extraResources puts icons in resources/icons/
  return path.join(process.resourcesPath, 'icons', iconName);
}

function createWindow() {
  // Restore window state or use defaults
  const savedState = store.get('windowState', {});
  
  // Validate saved position is within visible screen bounds
  const { screen } = require('electron');
  let validPosition = false;
  if (savedState.x !== undefined && savedState.y !== undefined) {
    const displays = screen.getAllDisplays();
    validPosition = displays.some((display) => {
      const { x, y, width, height } = display.workArea;
      return savedState.x >= x && savedState.x < x + width &&
             savedState.y >= y && savedState.y < y + height;
    });
  }

  const windowState = {
    width: savedState.width ?? 1280,
    height: savedState.height ?? 905,
    x: validPosition ? savedState.x : undefined,
    y: validPosition ? savedState.y : undefined,
    isMaximized: savedState.isMaximized ?? false,
  };

  mainWindow = new BrowserWindow({
    width: windowState.width,
    height: windowState.height,
    x: windowState.x,
    y: windowState.y,
    title: 'Paarrot',
    frame: false, // Custom window decorations
    resizable: true,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
      webSecurity: true,
      allowRunningInsecureContent: false,
      // Enable navigation gestures (works on macOS and some Linux environments)
      enableBlinkFeatures: 'OverscrollHistoryNavigation'
    },
    icon: getIconPath(process.platform === 'win32' ? 'icon.ico' : 'icon.png'),
    show: false // Don't show until ready
  });

  // Enable trackpad swipe gestures for navigation on macOS
  if (process.platform === 'darwin') {
    try {
      mainWindow.on('swipe', (event, direction) => {
        console.log(`Paarrot: Swipe gesture detected: ${direction}`);
        if (direction === 'left' && mainWindow.webContents.canGoForward()) {
          console.log('Paarrot: Navigating forward');
          mainWindow.webContents.goForward();
        } else if (direction === 'right' && mainWindow.webContents.canGoBack()) {
          console.log('Paarrot: Navigating back');
          mainWindow.webContents.goBack();
        }
      });
    } catch (error) {
      console.error('Paarrot: Failed to set up swipe gestures:', error);
    }
  }
  
  // On Linux, the OverscrollHistoryNavigation Blink feature should handle it automatically
  // On Windows, mouse buttons 4 & 5 are typically used for navigation (handled by Chromium)

  // Restore maximized state
  if (windowState.isMaximized) {
    mainWindow.maximize();
  }

  // Save window state on resize/move
  const saveWindowState = () => {
    if (!mainWindow.isMaximized() && !mainWindow.isMinimized() && !mainWindow.isFullScreen()) {
      const bounds = mainWindow.getBounds();
      store.set('windowState', {
        width: bounds.width,
        height: bounds.height,
        x: bounds.x,
        y: bounds.y,
        isMaximized: false
      });
    }
  };

  mainWindow.on('resize', saveWindowState);
  mainWindow.on('move', saveWindowState);
  mainWindow.on('maximize', () => {
    store.set('windowState.isMaximized', true);
  });
  mainWindow.on('unmaximize', () => {
    store.set('windowState.isMaximized', false);
  });

  // Set up session handlers BEFORE loading the app
  // Auto-approve media permissions including screen capture
  mainWindow.webContents.session.setPermissionRequestHandler((webContents, permission, callback) => {
    const allowedPermissions = ['media', 'microphone', 'camera', 'display-capture', 'notifications'];
    
    if (allowedPermissions.includes(permission)) {
      console.log(`Paarrot: Auto-approving permission: ${permission}`);
      callback(true);
    } else {
      console.log(`Paarrot: Denying permission: ${permission}`);
      callback(false);
    }
  });

  // Handle screen capture requests - always allow
  mainWindow.webContents.session.setPermissionCheckHandler((webContents, permission, requestingOrigin, details) => {
    console.log(`Paarrot: Permission check - ${permission} from ${requestingOrigin}`);
    return true; // Allow all permissions
  });

  // Handle display media request (screen sharing) - this is the key for Electron screen capture
  mainWindow.webContents.session.setDisplayMediaRequestHandler(async (request, callback) => {
    console.log('Paarrot: Display media request received', request);
    
    try {
      const sources = await desktopCapturer.getSources({
        types: ['screen', 'window'],
        thumbnailSize: { width: 150, height: 150 }
      });
      
      console.log('Paarrot: Available sources:', sources.length);
      sources.forEach((s, i) => console.log(`  ${i}: ${s.name} (${s.id})`));
      
      if (sources.length === 0) {
        console.log('Paarrot: No sources available, denying request');
        callback({});
        return;
      }
      
      // Prefer screens over windows
      const source = sources.find(s => s.id.startsWith('screen:')) || sources[0];
      console.log('Paarrot: Selected source:', source.name, source.id);
      
      // Return the selected source - video is required
      callback({ video: source });
    } catch (error) {
      console.error('Paarrot: Error getting display sources:', error);
      callback({});
    }
  }, { useSystemPicker: false });

  // Disable default context menu, only show for text selection and images
  mainWindow.webContents.on('context-menu', (event, params) => {
    const { selectionText, isEditable, mediaType, srcURL } = params;
    
    // Show context menu for text selection, editable fields, or images
    if (selectionText || isEditable || mediaType === 'image') {
      // Build a minimal menu for text operations
      const template = [];
      
      if (params.misspelledWord) {
        // Add spelling suggestions
        params.dictionarySuggestions.slice(0, 5).forEach(suggestion => {
          template.push({
            label: suggestion,
            click: () => mainWindow.webContents.replaceMisspelling(suggestion)
          });
        });
        if (template.length > 0) {
          template.push({ type: 'separator' });
        }
      }
      
      // Image context menu options
      if (mediaType === 'image' && srcURL) {
        template.push(
          {
            label: 'Copy Image',
            click: () => {
              mainWindow.webContents.copyImageAt(params.x, params.y);
            }
          },
          {
            label: 'Save Image As...',
            click: () => {
              mainWindow.webContents.downloadURL(srcURL);
            }
          }
        );
        if (selectionText) {
          template.push({ type: 'separator' });
        }
      }
      
      if (selectionText) {
        template.push(
          {
            label: 'Copy',
            role: 'copy',
            accelerator: 'CmdOrCtrl+C'
          }
        );
      }
      
      if (isEditable) {
        if (selectionText) {
          template.push(
            {
              label: 'Cut',
              role: 'cut',
              accelerator: 'CmdOrCtrl+X'
            }
          );
        }
        template.push(
          {
            label: 'Paste',
            role: 'paste',
            accelerator: 'CmdOrCtrl+V'
          }
        );
        if (selectionText) {
          template.push({ type: 'separator' });
          template.push(
            {
              label: 'Select All',
              role: 'selectAll',
              accelerator: 'CmdOrCtrl+A'
            }
          );
        }
      }
      
      if (template.length > 0) {
        const menu = Menu.buildFromTemplate(template);
        menu.popup(mainWindow);
      }
    }
    // If no text selected, not editable, and not an image, suppress the context menu entirely
  });

  // Load the app
  if (isDev) {
    mainWindow.loadURL(VITE_DEV_SERVER);
    // Open DevTools in development
    mainWindow.webContents.openDevTools();
  } else {
    // In production, serve from built files
    mainWindow.loadFile(path.join(__dirname, '../cinny/dist/index.html'));
  }

  // Show window when ready
  mainWindow.once('ready-to-show', () => {
    // Check for --minimized flag (autostart)
    if (!process.argv.includes('--minimized')) {
      mainWindow.show();
    }
  });

  // Handle window close - minimize to tray
  mainWindow.on('close', (event) => {
    if (!isQuitting) {
      event.preventDefault();
      mainWindow.hide();
      return false;
    }
  });

  mainWindow.on('closed', () => {
    mainWindow = null;
  });

  // Open external links in default browser
  mainWindow.webContents.setWindowOpenHandler(({ url, features }) => {
    if (url.startsWith('http://') || url.startsWith('https://')) {
      shell.openExternal(url);
      return { action: 'deny' };
    }
    // Allow blank windows for screen share pop-outs with custom features
    if (url === '' || url === 'about:blank') {
      return { 
        action: 'allow',
        overrideBrowserWindowOptions: {
          frame: false,
          resizable: true,
          backgroundColor: '#000000',
          webPreferences: {
            contextIsolation: true,
            nodeIntegration: false,
            backgroundThrottling: false,
          }
        }
      };
    }
    return { action: 'allow' };
  });

  // Navigation handler - open external links in browser
  mainWindow.webContents.on('will-navigate', (event, url) => {
    const allowedOrigins = [
      'http://localhost:8080',
      'http://localhost:44548',
      'http://127.0.0.1:8080',
      'http://127.0.0.1:44548'
    ];
    
    const isAllowed = allowedOrigins.some(origin => url.startsWith(origin)) ||
                      url.startsWith('blob:') ||
                      url.startsWith('data:');
    
    if (!isAllowed && (url.startsWith('http://') || url.startsWith('https://'))) {
      event.preventDefault();
      shell.openExternal(url);
    }
  });

  return mainWindow;
}

function createTray() {
  const iconPath = getIconPath('icon.png');
  const trayIcon = nativeImage.createFromPath(iconPath);
  tray = new Tray(trayIcon.resize({ width: 16, height: 16 }));

  const contextMenu = Menu.buildFromTemplate([
    {
      label: 'Show Paarrot',
      click: () => {
        if (mainWindow) {
          mainWindow.show();
          mainWindow.focus();
        }
      }
    },
    { type: 'separator' },
    {
      label: 'Quit',
      click: () => {
        isQuitting = true;
        app.quit();
      }
    }
  ]);

  tray.setContextMenu(contextMenu);
  tray.setToolTip('Paarrot');

  // Click tray icon to show window
  tray.on('click', () => {
    if (mainWindow) {
      if (mainWindow.isVisible()) {
        mainWindow.hide();
      } else {
        mainWindow.show();
        mainWindow.focus();
      }
    }
  });
}

// App lifecycle
app.whenReady().then(() => {
  createWindow();
  createTray();
  
  // Start API server
  apiServer = new PaarrotAPIServer(mainWindow);
  apiServer.start().catch(err => {
    console.error('Failed to start API server:', err);
  });
  
  // Check for updates on startup (not in development mode)
  if (!isDev) {
    // Check for updates on start (after 3 seconds)
    setTimeout(() => {
      autoUpdater.checkForUpdates().catch(err => {
        console.error('Failed to check for updates:', err);
      });
    }, 3000);

    // Check for updates every 6 hours
    setInterval(() => {
      autoUpdater.checkForUpdates().catch(err => {
        console.error('Failed to check for updates:', err);
      });
    }, 6 * 60 * 60 * 1000);
  }
});

app.on('window-all-closed', () => {
  // On macOS, apps stay active until Cmd+Q
  if (process.platform !== 'darwin') {
    // But we want to stay in tray, so don't quit
    // app.quit();
  }
});

app.on('activate', () => {
  // On macOS, recreate window when dock icon is clicked
  if (BrowserWindow.getAllWindows().length === 0) {
    createWindow();
  } else if (mainWindow) {
    mainWindow.show();
  }
});

app.on('before-quit', () => {
  isQuitting = true;
  
  // Stop API server
  if (apiServer) {
    apiServer.stop();
  }
});

// ==================== IPC Handlers ====================

// Window controls
ipcMain.handle('window:minimize', () => {
  if (mainWindow) mainWindow.minimize();
});

ipcMain.handle('window:maximize', () => {
  if (mainWindow) {
    if (mainWindow.isMaximized()) {
      mainWindow.unmaximize();
    } else {
      mainWindow.maximize();
    }
  }
});

ipcMain.handle('window:unmaximize', () => {
  if (mainWindow) mainWindow.unmaximize();
});

ipcMain.handle('window:close', () => {
  if (mainWindow) mainWindow.close();
});

ipcMain.handle('window:focus', () => {
  if (mainWindow) {
    if (mainWindow.isMinimized()) mainWindow.restore();
    mainWindow.show();
    mainWindow.focus();
  }
});

ipcMain.handle('window:flash-frame', (event, flash = true) => {
  console.log('[Main] window:flash-frame called with:', flash);
  if (mainWindow) {
    console.log('[Main] Calling flashFrame on mainWindow');
    mainWindow.flashFrame(flash);
    return { success: true };
  }
  console.log('[Main] No mainWindow available');
  return { success: false, error: 'No window' };
});

ipcMain.handle('window:is-maximized', () => {
  return mainWindow ? mainWindow.isMaximized() : false;
});

ipcMain.handle('window:start-drag', () => {
  if (mainWindow) mainWindow.webContents.startDrag({ file: '', icon: nativeImage.createEmpty() });
});

// Get app version (Tauri-compatible API)
ipcMain.handle('plugin:app|version', () => {
  return app.getVersion();
});

// Open external URL
ipcMain.handle('open-external-url', async (event, url) => {
  try {
    await shell.openExternal(url);
    return { success: true };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

// Read clipboard image
ipcMain.handle('read-clipboard-image', async () => {
  try {
    const image = clipboard.readImage();
    if (image.isEmpty()) {
      return { success: true, data: null };
    }
    
    // Convert to PNG base64
    const pngBuffer = image.toPNG();
    const base64 = pngBuffer.toString('base64');
    return { 
      success: true, 
      data: `data:image/png;base64,${base64}` 
    };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

// Write text to clipboard
ipcMain.handle('write-clipboard-text', async (event, text) => {
  try {
    clipboard.writeText(text);
    return { success: true };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

ipcMain.handle('get-sound-base-url', () => {
  if (isDev) return null; // renderer uses ./sound/ relative path in dev
  return `file://${path.join(process.resourcesPath, 'sound').replace(/\\/g, '/')}`;
});

// Play notification sound via the renderer's Chromium audio engine.
// Chromium has native OGG support on all platforms, so this is always reliable.
ipcMain.handle('play-notification-sound', async (event, soundType = 'message') => {
  if (!mainWindow || mainWindow.isDestroyed()) {
    return { success: false, error: 'No main window' };
  }
  const soundFile = soundType === 'invite' ? 'invite.ogg' : 'notification.ogg';
  // In dev, Vite serves sounds via HTTP so relative path works.
  // In production, sounds are in resources/sound/ as plain files (extraResources).
  const audioSrc = isDev
    ? `./sound/${soundFile}`
    : `file://${path.join(process.resourcesPath, 'sound', soundFile).replace(/\\/g, '/')}`;
  try {
    await mainWindow.webContents.executeJavaScript(
      `new Audio('${audioSrc}').play().catch(() => {}); true;`
    );
    return { success: true };
  } catch (error) {
    console.error('[Audio] Failed to play sound:', error);
    return { success: false, error: error.message };
  }
});

// Get YouTube stream using yt-dlp
ipcMain.handle('get-youtube-stream', async (event, url) => {
  try {
    // Check if yt-dlp is available
    try {
      await execAsync('yt-dlp --version');
    } catch {
      return { 
        success: false, 
        error: 'yt-dlp is not installed. Please install yt-dlp to use YouTube features.' 
      };
    }

    // Get title
    let title = 'YouTube Video';
    try {
      const titleResult = await execAsync(`yt-dlp --get-title "${url}"`);
      title = titleResult.stdout.trim();
    } catch (e) {
      console.warn('Failed to get video title:', e.message);
    }

    // Get video URL
    const result = await execAsync(
      `yt-dlp -g -f "best[height<=1080]/bestvideo[height<=1080]+bestaudio/best" "${url}"`
    );
    
    const videoUrl = result.stdout.trim().split('\n')[0];
    
    if (!videoUrl) {
      return { success: false, error: 'yt-dlp returned empty URL' };
    }

    return { 
      success: true, 
      data: { video_url: videoUrl, title } 
    };
  } catch (error) {
    return { 
      success: false, 
      error: `yt-dlp error: ${error.message}` 
    };
  }
});

// Background sync stubs (desktop doesn't need it)
ipcMain.handle('start-background-sync', async () => {
  return { success: true };
});

ipcMain.handle('stop-background-sync', async () => {
  return { success: true };
});

ipcMain.handle('get-background-sync-state', async () => {
  return { success: true, data: 'NotApplicable' };
});

// Auto-updater IPC handlers
ipcMain.handle('check-for-updates', async () => {
  if (isDev) {
    return { success: false, error: 'Updates are not available in development mode' };
  }
  try {
    const result = await autoUpdater.checkForUpdates();
    return { success: true, data: result };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

ipcMain.handle('download-update', async () => {
  if (isDev) {
    return { success: false, error: 'Updates are not available in development mode' };
  }
  try {
    await autoUpdater.downloadUpdate();
    return { success: true };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

ipcMain.handle('install-update', () => {
  if (isDev) {
    return { success: false, error: 'Updates are not available in development mode' };
  }
  autoUpdater.quitAndInstall();
  return { success: true };
});

ipcMain.handle('download-and-install-update', async () => {
  if (isDev) {
    return { success: false, error: 'Updates are not available in development mode' };
  }
  try {
    await autoUpdater.downloadUpdate();
    autoUpdater.quitAndInstall();
    return { success: true };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

// Screen capture / desktopCapturer handler
ipcMain.handle('get-desktop-sources', async (event, opts) => {
  try {
    const sources = await desktopCapturer.getSources(opts);
    return { success: true, data: sources };
  } catch (error) {
    console.error('Failed to get desktop sources:', error);
    return { success: false, error: error.message };
  }
});

// Desktop notification handler
ipcMain.handle('show-notification', async (event, { title, body, icon, roomId, eventId }) => {
  try {
    const { Notification } = require('electron');
    
    if (!Notification.isSupported()) {
      console.error('Notifications not supported on this system');
      return { success: false, error: 'Notifications not supported on this system' };
    }
    
    const notification = new Notification({
      title: title || 'Paarrot',
      body: body || '',
      icon: icon || getIconPath(process.platform === 'win32' ? 'icon.ico' : 'icon.png'),
      silent: false,
    });
    
    notification.on('click', () => {
      console.log('Paarrot: Notification clicked, roomId:', roomId);
      if (mainWindow) {
        console.log('Paarrot: Sending navigation to renderer');
        mainWindow.show();
        mainWindow.focus();
        if (roomId) {
          mainWindow.webContents.send('notification:navigate', { roomId, eventId });
          console.log('Paarrot: Navigation event sent');
        }
      } else {
        console.log('Paarrot: No mainWindow available');
      }
    });
    
    notification.on('show', () => console.log('Paarrot: Notification shown'));
    notification.on('failed', (e, err) => console.error('Paarrot: Notification failed:', err));
    
    notification.show();
    
    return { success: true };
  } catch (error) {
    console.error('Failed to show notification:', error);
    return { success: false, error: error.message };
  }
});

// Plugin management
const getPluginsDir = () => {
  try {
    const pluginsPath = path.join(app.getPath('userData'), 'plugins');
    if (!fs.existsSync(pluginsPath)) {
      fs.mkdirSync(pluginsPath, { recursive: true });
    }
    return pluginsPath;
  } catch (error) {
    console.error('Failed to get plugins directory:', error);
    throw error;
  }
};

/**
 * Resolves plugin entry file from directory.
 * Supports direct `index.js` or `package.json#main` entries.
 */
const resolvePluginEntryFromDir = (pluginDir) => {
  const packageJsonPath = path.join(pluginDir, 'package.json');

  if (fs.existsSync(packageJsonPath)) {
    try {
      const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
      if (typeof packageJson.main === 'string') {
        const mainPath = path.resolve(pluginDir, packageJson.main);
        if (fs.existsSync(mainPath)) {
          return mainPath;
        }
      }
    } catch (error) {
      console.warn(`Failed to parse package.json in ${pluginDir}:`, error);
    }
  }

  const indexPath = path.join(pluginDir, 'index.js');
  return fs.existsSync(indexPath) ? indexPath : null;
};

/**
 * Resolves plugin entry file from extracted plugin directory.
 * Handles archives that unpack into single nested root folder.
 */
const resolvePluginEntryPath = (pluginDir) => {
  const directEntry = resolvePluginEntryFromDir(pluginDir);
  if (directEntry) {
    return directEntry;
  }

  const childDirectories = fs.readdirSync(pluginDir, { withFileTypes: true }).filter((entry) => entry.isDirectory());
  if (childDirectories.length !== 1) {
    return null;
  }

  return resolvePluginEntryFromDir(path.join(pluginDir, childDirectories[0].name));
};

ipcMain.handle('plugin:get-path', async () => {
  try {
    // Wait for app to be ready before accessing userData path
    await app.whenReady();
    return { success: true, data: getPluginsDir() };
  } catch (error) {
    return { success: false, error: error.message };
  }
});

ipcMain.handle('plugin:download', async (event, { pluginId, downloadUrl, name }) => {
  try {
    // Wait for app to be ready before accessing userData path
    await app.whenReady();
    const pluginsDir = getPluginsDir();
    const pluginDir = path.join(pluginsDir, pluginId);
    
    // Check if already installed
    if (fs.existsSync(pluginDir)) {
      return { success: false, error: 'Plugin already installed' };
    }
    
    // Validate downloadUrl
    if (!downloadUrl || typeof downloadUrl !== 'string' || downloadUrl.trim() === '') {
      return { success: false, error: 'Plugin metadata missing downloadUrl field' };
    }
    
    // Download the zip file
    const tempZipPath = path.join(app.getPath('temp'), `${pluginId}.zip`);
    
    await new Promise((resolve, reject) => {
      const protocol = downloadUrl.startsWith('https') ? https : http;
      const file = fs.createWriteStream(tempZipPath);
      
      protocol.get(downloadUrl, (response) => {
        if (response.statusCode === 302 || response.statusCode === 301) {
          // Handle redirect
          const redirectUrl = response.headers.location;
          const redirectProtocol = redirectUrl.startsWith('https') ? https : http;
          redirectProtocol.get(redirectUrl, (redirectResponse) => {
            redirectResponse.pipe(file);
            file.on('finish', () => {
              file.close(resolve);
            });
          }).on('error', reject);
        } else {
          response.pipe(file);
          file.on('finish', () => {
            file.close(resolve);
          });
        }
      }).on('error', (err) => {
        fs.unlinkSync(tempZipPath);
        reject(err);
      });
    });
    
    // Extract the zip file to temp location first
    const tempExtractDir = path.join(app.getPath('temp'), `${pluginId}-extract`);
    if (fs.existsSync(tempExtractDir)) {
      fs.rmSync(tempExtractDir, { recursive: true, force: true });
    }
    fs.mkdirSync(tempExtractDir, { recursive: true });
    
    const zip = new AdmZip(tempZipPath);
    zip.extractAllTo(tempExtractDir, true);
    
    // Clean up temp zip
    fs.unlinkSync(tempZipPath);
    
    // GitHub archives extract to repo-name-branch/ folder, flatten it
    const extractedContents = fs.readdirSync(tempExtractDir);
    let sourceDir = tempExtractDir;
    
    // If single folder exists, move contents up one level
    if (extractedContents.length === 1) {
      const singleItem = path.join(tempExtractDir, extractedContents[0]);
      if (fs.statSync(singleItem).isDirectory()) {
        sourceDir = singleItem;
      }
    }
    
    // Move contents to final plugin directory
    fs.mkdirSync(pluginDir, { recursive: true });
    const files = fs.readdirSync(sourceDir);
    for (const file of files) {
      const srcPath = path.join(sourceDir, file);
      const destPath = path.join(pluginDir, file);
      fs.renameSync(srcPath, destPath);
    }
    
    // Clean up temp extract dir
    fs.rmSync(tempExtractDir, { recursive: true, force: true });
    
    // Store metadata
    const metadataPath = path.join(pluginDir, 'plugin-metadata.json');
    fs.writeFileSync(metadataPath, JSON.stringify({
      id: pluginId,
      name: name,
      installedDate: new Date().toISOString(),
    }, null, 2));
    
    return { success: true, data: { path: pluginDir } };
  } catch (error) {
    console.error('Failed to download plugin:', error);
    return { success: false, error: error.message };
  }
});

ipcMain.handle('plugin:list', async () => {
  try {
    // Wait for app to be ready before accessing userData path
    await app.whenReady();
    const pluginsDir = getPluginsDir();
    const plugins = [];
    
    if (fs.existsSync(pluginsDir)) {
      const items = fs.readdirSync(pluginsDir);
      
      for (const item of items) {
        const itemPath = path.join(pluginsDir, item);
        const stats = fs.statSync(itemPath);
        
        if (stats.isDirectory()) {
          const metadataPath = path.join(itemPath, 'plugin-metadata.json');
          if (fs.existsSync(metadataPath)) {
            try {
              const metadata = JSON.parse(fs.readFileSync(metadataPath, 'utf8'));
              plugins.push({
                id: item,
                path: itemPath,
                ...metadata
              });
            } catch (err) {
              console.error(`Failed to read metadata for plugin ${item}:`, err);
            }
          }
        }
      }
    }
    
    return { success: true, data: plugins };
  } catch (error) {
    console.error('Failed to list plugins:', error);
    return { success: false, error: error.message };
  }
});

ipcMain.handle('plugin:uninstall', async (event, pluginId) => {
  try {
    // Wait for app to be ready before accessing userData path
    await app.whenReady();
    const pluginsDir = getPluginsDir();
    const pluginDir = path.join(pluginsDir, pluginId);
    
    if (!fs.existsSync(pluginDir)) {
      return { success: false, error: 'Plugin not found' };
    }
    
    // Recursively delete the plugin directory
    const deleteDir = (dirPath) => {
      if (fs.existsSync(dirPath)) {
        fs.readdirSync(dirPath).forEach((file) => {
          const curPath = path.join(dirPath, file);
          if (fs.lstatSync(curPath).isDirectory()) {
            deleteDir(curPath);
          } else {
            fs.unlinkSync(curPath);
          }
        });
        fs.rmdirSync(dirPath);
      }
    };
    
    deleteDir(pluginDir);
    
    return { success: true };
  } catch (error) {
    console.error('Failed to uninstall plugin:', error);
    return { success: false, error: error.message };
  }
});

ipcMain.handle('plugin:read-code', async (event, pluginId) => {
  try {
    await app.whenReady();
    const pluginsDir = getPluginsDir();
    const pluginDir = path.join(pluginsDir, pluginId);
    const pluginPath = resolvePluginEntryPath(pluginDir);
    
    if (!pluginPath || !fs.existsSync(pluginPath)) {
      return { success: false, error: 'Plugin index.js not found' };
    }
    
    const code = fs.readFileSync(pluginPath, 'utf8');
    return { success: true, data: code };
  } catch (error) {
    console.error('Failed to read plugin code:', error);
    return { success: false, error: error.message };
  }
});

console.log('Paarrot Electron main process started');
console.log('Development mode:', isDev);
console.log('Platform:', process.platform);
console.log('Plugin handlers registered');