const CACHE_NAME = 'bscscore-v2.1.0';
const APP_SHELL = [
  '/',
  '/index.html',
  '/manifest.webmanifest',
  '/favicon.ico',
  '/icon-192.png',
  '/icon-512.png',
];

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

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

self.addEventListener('fetch', (event) => {
  const { request } = event;
  const requestUrl = new URL(request.url);

  if (request.method !== 'GET' || requestUrl.origin !== self.location.origin) {
    return;
  }

  if (request.mode === 'navigate') {
    event.respondWith(
      fetch(request)
        .then((response) => {
          const responseClone = response.clone();
          caches.open(CACHE_NAME).then((cache) => cache.put(request, responseClone));
          return response;
        })
        .catch(() => caches.match(request).then((cached) => cached || caches.match('/'))),
    );
    return;
  }

  event.respondWith(
    caches.match(request).then((cachedResponse) => {
      if (cachedResponse) {
        return cachedResponse;
      }

      return fetch(request).then((networkResponse) => {
        const networkClone = networkResponse.clone();
        caches.open(CACHE_NAME).then((cache) => cache.put(request, networkClone));
        return networkResponse;
      });
    }),
  );
});