/* eslint-disable no-restricted-globals */

const CACHE_NAME = 'findagram-v1';
const urlsToCache = [
  '/',
  '/index.html',
  '/manifest.json',
];

// Install service worker
self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      console.log('Opened cache');
      return cache.addAll(urlsToCache);
    })
  );
  self.skipWaiting();
});

// Fetch event - network first, fallback to cache
self.addEventListener('fetch', (event) => {
  // Skip non-GET requests
  if (event.request.method !== 'GET') return;

  // Skip chrome-extension requests
  if (event.request.url.startsWith('chrome-extension://')) return;

  event.respondWith(
    fetch(event.request)
      .then((response) => {
        // Clone the response
        const responseClone = response.clone();

        // Cache successful responses
        if (response.status === 200) {
          caches.open(CACHE_NAME).then((cache) => {
            cache.put(event.request, responseClone);
          });
        }

        return response;
      })
      .catch(() => {
        // Fallback to 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('/');
          }
          return new Response('Offline', { status: 503 });
        });
      })
  );
});

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

// Push notification handling
self.addEventListener('push', (event) => {
  if (!event.data) return;

  const data = event.data.json();
  const options = {
    body: data.body || 'New notification from Find a Gram',
    icon: '/logo192.png',
    badge: '/logo192.png',
    vibrate: [100, 50, 100],
    data: {
      url: data.url || '/',
    },
  };

  event.waitUntil(
    self.registration.showNotification(data.title || 'Find a Gram', options)
  );
});

// Notification click handling
self.addEventListener('notificationclick', (event) => {
  event.notification.close();

  event.waitUntil(
    self.clients.matchAll({ type: 'window' }).then((clientList) => {
      // If there's already a window open, focus it
      for (const client of clientList) {
        if (client.url === event.notification.data.url && 'focus' in client) {
          return client.focus();
        }
      }
      // Otherwise, open a new window
      if (self.clients.openWindow) {
        return self.clients.openWindow(event.notification.data.url);
      }
    })
  );
});