const CACHE_NAME = 'bscscore-v1';
const URLS_TO_CACHE = [
  '/',
  '/index.html',
  '/manifest.json',
  '/favicon.ico',
  '/icon-192.png',
  '/icon-512.png'
];

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

self.addEventListener('activate', event => {
  event.waitUntil(
    caches.keys().then(keys =>
      Promise.all(keys.filter(key => key !== CACHE_NAME).map(key => caches.delete(key)))
    )
  );
});

self.addEventListener('fetch', event => {
  event.respondWith(
    caches.match(event.request).then(response =>
      response || fetch(event.request).catch(() => caches.match('/index.html'))
    )
  );
});