// App Data Worker - Fetches installed apps from Android
let appCache = [];
let lastUpdate = 0;

self.addEventListener('message', async (e) => {
  const { action, filter } = e.data;
  
  switch (action) {
    case 'FETCH_ALL':
      const apps = await fetchInstalledApps();
      self.postMessage({ type: 'APPS_LOADED', apps, count: apps.length });
      break;
      
    case 'FETCH_CATEGORIES':
      const categories = await fetchAppCategories();
      self.postMessage({ type: 'CATEGORIES_LOADED', categories });
      break;
      
    case 'LAUNCH_APP':
      await launchApp(filter.package);
      break;
      
    case 'GET_APP_INFO':
      const info = await getAppInfo(filter.package);
      self.postMessage({ type: 'APP_INFO', info });
      break;
      
    case 'SEARCH':
      const results = searchApps(filter.query);
      self.postMessage({ type: 'SEARCH_RESULTS', results });
      break;
  }
});

async function fetchInstalledApps() {
  const now = Date.now();
  
  // Return cached if recent (< 5 seconds)
  if (now - lastUpdate < 5000 && appCache.length > 0) {
    return appCache;
  }
  
  let apps = [];
  
  // Try Android interface first
  if (self.Android?.PackageManager?.getInstalledApps) {
    apps = JSON.parse(self.Android.PackageManager.getInstalledApps());
  } else {
    // Fallback: Generate from localStorage or defaults
    apps = getFallbackApps();
  }
  
  // Parallel icon fetching
  const withIcons = await Promise.all(
    apps.map(async (app) => ({
      ...app,
      hasIcon: await checkIcon(app.package),
      iconUrl: `/api/android/icon/${app.package}`
    }))
  );
  
  appCache = withIcons;
  lastUpdate = now;
  
  return withIcons;
}

async function fetchAppCategories() {
  const apps = await fetchInstalledApps();
  const categories = {};
  
  apps.forEach(app => {
    const cat = app.category || 'uncategorized';
    if (!categories[cat]) categories[cat] = [];
    categories[cat].push(app);
  });
  
  return categories;
}

function searchApps(query) {
  const q = query.toLowerCase();
  return appCache.filter(app => 
    app.name.toLowerCase().includes(q) ||
    app.package.toLowerCase().includes(q)
  );
}

async function launchApp(packageName) {
  if (self.Android?.Intent?.launch) {
    self.Android.Intent.launch(packageName);
    return true;
  }
  
  // PWA fallback - try to open as URL scheme
  try {
    window.open(`android-app://${packageName}`, '_blank');
  } catch (e) {
    self.postMessage({ type: 'LAUNCH_FAILED', package: packageName });
  }
}

async function getAppInfo(packageName) {
  const app = appCache.find(a => a.package === packageName);
  if (app) return app;
  
  // Fetch fresh
  if (self.Android?.PackageManager?.getAppInfo) {
    return JSON.parse(self.Android.PackageManager.getAppInfo(packageName));
  }
  
  return null;
}

async function checkIcon(packageName) {
  // Check if icon exists in cache
  return true; // Simplified for worker
}

function getFallbackApps() {
  // Comprehensive default app list for Samsung S23 Ultra
  return [
    // System
    { name: 'Settings', package: 'com.android.settings', category: 'system', icon: 'settings' },
    { name: 'Files', package: 'com.android.documentsui', category: 'system', icon: 'folder' },
    { name: 'Calculator', package: 'com.google.android.calculator', category: 'system', icon: 'hash' },
    { name: 'Calendar', package: 'com.samsung.android.calendar', category: 'system', icon: 'calendar' },
    { name: 'Clock', package: 'com.sec.android.app.clockpackage', category: 'system', icon: 'clock' },
    { name: 'Weather', package: 'com.sec.android.daemonapp', category: 'system', icon: 'cloud' },
    { name: 'Samsung Notes', package: 'com.samsung.android.app.notes', category: 'system', icon: 'file-text' },
    { name: 'SmartThings', package: 'com.samsung.android.oneconnect', category: 'system', icon: 'home' },
    { name: 'Device Care', package: 'com.samsung.android.lool', category: 'system', icon: 'shield' },
    { name: 'Gallery', package: 'com.samsung.android.gallery3d', category: 'media', icon: 'image' },
    { name: 'Camera', package: 'com.sec.android.app.camera', category: 'media', icon: 'camera' },
    { name: 'Voice Recorder', package: 'com.sec.android.app.voicenote', category: 'media', icon: 'mic' },
    
    // Communication
    { name: 'Phone', package: 'com.samsung.android.dialer', category: 'communication', icon: 'phone' },
    { name: 'Messages', package: 'com.samsung.android.messaging', category: 'communication', icon: 'message-square' },
    { name: 'Contacts', package: 'com.samsung.android.app.contacts', category: 'communication', icon: 'users' },
    { name: 'Gmail', package: 'com.google.android.gm', category: 'communication', icon: 'mail' },
    
    // Internet
    { name: 'Samsung Internet', package: 'com.sec.android.app.sbrowser', category: 'internet', icon: 'globe' },
    { name: 'Chrome', package: 'com.android.chrome', category: 'internet', icon: 'chrome' },
    
    // Media
    { name: 'Spotify', package: 'com.spotify.music', category: 'media', icon: 'music' },
    { name: 'YouTube', package: 'com.google.android.youtube', category: 'media', icon: 'youtube' },
    { name: 'Netflix', package: 'com.netflix.mediaclient', category: 'media', icon: 'film' },
    { name: 'Samsung Music', package: 'com.sec.android.app.music', category: 'media', icon: 'headphones' },
    
    // Productivity
    { name: 'Google Drive', package: 'com.google.android.apps.docs', category: 'productivity', icon: 'hard-drive' },
    { name: 'Samsung Wallet', package: 'com.samsung.android.spay', category: 'productivity', icon: 'credit-card' },
    { name: 'Maps', package: 'com.google.android.apps.maps', category: 'productivity', icon: 'map' },
    
    // Social
    { name: 'Samsung Members', package: 'com.samsung.android.voc', category: 'social', icon: 'users' },
    
    // Development
    { name: 'Termux', package: 'com.termux', category: 'dev', icon: 'terminal' },
  ];
}