const CACHE_NAME = 'uptime-monitor-v2';
const urlsToCache = [
  '/',
  '/index.php',
  '/assets/css/custom.css',
  '/assets/js/main.js',
  '/manifest.json'
];

self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => cache.addAll(urlsToCache))
  );
  self.skipWaiting();
});

self.addEventListener('fetch', event => {
  // Bypassing API and external calls from cache
  if (event.request.url.includes('api/ping.php') || event.request.url.includes('api.telegram.org')) {
    return;
  }
  event.respondWith(
    caches.match(event.request)
      .then(response => {
        if (response) return response;
        return fetch(event.request);
      })
  );
});

self.addEventListener('activate', event => {
  const cacheWhitelist = [CACHE_NAME];
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames.map(cacheName => {
          if (cacheWhitelist.indexOf(cacheName) === -1) {
            return caches.delete(cacheName);
          }
        })
      );
    }).then(() => self.clients.claim())
  );
});