const CACHE_NAME = 'archdroid-v1';
const PARALLEL_WORKERS = [
  '/workers/settings-worker.js',
  '/workers/app-data-worker.js',
  '/workers/gesture-worker.js',
  '/workers/notification-worker.js',
  '/workers/system-sync-worker.js'
];

const STATIC_ASSETS = [
  '/',
  '/index.html',
  '/style.css',
  '/script.js',
  '/components/arch-status-bar.js',
  '/components/arch-app-icon.js',
  '/components/arch-app-grid.js',
  '/components/arch-app-drawer.js',
  '/components/arch-server-panel.js',
  '/components/arch-settings-panel.js',
  '/components/arch-notifications.js'
];

// Install: Cache static assets
self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      return cache.addAll(STATIC_ASSETS);
    })
  );
  self.skipWaiting();
});

// Activate: Clean old caches
self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames
          .filter((name) => name !== CACHE_NAME)
          .map((name) => caches.delete(name))
      );
    })
  );
  self.clients.claim();
});

// Message handling from main thread
self.addEventListener('message', async (event) => {
  const { type, payload } = event.data;
  
  switch (type) {
    case 'SYNC_SETTINGS':
      await syncSettings(event.source.id);
      break;
    case 'FETCH_APPS':
      await fetchAppsParallel(event.source.id);
      break;
    case 'REQUEST_PERMISSION':
      await handlePermission(payload);
      break;
  }
});

// Parallel settings sync
async function syncSettings(clientId) {
  const settings = await Promise.all([
    fetch('/api/android/settings/display').catch(() => null),
    fetch('/api/android/settings/sound').catch(() => null),
    fetch('/api/android/settings/notifications').catch(() => null),
    fetch('/api/android/settings/accessibility').catch(() => null)
  ]);
  
  const client = await self.clients.get(clientId);
  if (client) {
    client.postMessage({
      type: 'SETTINGS_SYNCED',
      payload: {
        display: settings[0],
        sound: settings[1],
        notifications: settings[2],
        accessibility: settings[3]
      }
    });
  }
}

// Parallel app data fetching with worker pool
async function fetchAppsParallel(clientId) {
  const channels = ['system', 'user', 'disabled', 'work'];
  
  const results = await Promise.all(channels.map(channel => 
    fetch(`/api/android/apps/${channel}`).catch(() => [])
  ));
  
  const allApps = results.flat();
  
  const client = await self.clients.get(clientId);
  if (client) {
    client.postMessage({
      type: 'APPS_FETCHED',
      payload: allApps
    });
  }
}

// Fetch strategy with network first, cache fallback
self.addEventListener('fetch', (event) => {
  event.respondWith(
    fetch(event.request)
      .then((response) => {
        // Cache successful responses
        if (response.ok) {
          const clone = response.clone();
          caches.open(CACHE_NAME).then((cache) => {
            cache.put(event.request, clone);
          });
        }
        return response;
      })
      .catch(() => {
        // Fallback to cache
        return caches.match(event.request);
      })
  );
});

// Background sync for settings
self.addEventListener('sync', (event) => {
  if (event.tag === 'settings-sync') {
    event.waitUntil(syncSettings(self.clients.matchAll()[0]?.id));
  }
});