// Service Worker for Habland Admin Panel
const CACHE_NAME = 'habland-admin-v1.1.0';
const urlsToCache = [
  '/',
  '/manifest.json',
];

// Install event - cache essential resources
self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then((cache) => {
        console.log('Opened cache');
        return cache.addAll(urlsToCache);
      })
      .catch((error) => {
        console.error('Cache install failed:', error);
      })
  );
  self.skipWaiting();
});

// Activate event - clean up old caches
self.addEventListener('activate', (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) => {
      return Promise.all(
        cacheNames.map((cacheName) => {
          if (cacheName !== CACHE_NAME) {
            console.log('Deleting old cache:', cacheName);
            return caches.delete(cacheName);
          }
        })
      );
    })
  );
  self.clients.claim();
});

// Fetch event - network first, fallback to cache
self.addEventListener('fetch', (event) => {
  // Skip chrome-extension and other non-http requests
  if (!event.request.url.startsWith('http')) {
    return;
  }

  // Skip caching for non-GET requests (POST, PUT, DELETE, etc.)
  // The Cache API only supports GET requests
  if (event.request.method !== 'GET') {
    event.respondWith(fetch(event.request));
    return;
  }

  event.respondWith(
    fetch(event.request)
      .then((response) => {
        // Don't cache if not a valid response
        if (!response || response.status !== 200 || response.type !== 'basic') {
          return response;
        }

        // Clone the response
        const responseToCache = response.clone();

        caches.open(CACHE_NAME)
          .then((cache) => {
            cache.put(event.request, responseToCache);
          });

        return response;
      })
      .catch(() => {
        // Network failed, try cache
        return caches.match(event.request)
          .then((response) => {
            if (response) {
              return response;
            }
            // Return offline page for navigation requests
            if (event.request.mode === 'navigate') {
              return caches.match('/');
            }
          });
      })
  );
});

// Handle messages from clients
self.addEventListener('message', (event) => {
  if (event.data && event.data.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});