const CACHE_NAME = 'sysadmin-arcade-v2';

const PRECACHE_URLS = [
  './',
  './index.html',
  './games.json',
  './manifest.webmanifest',
  './favicon/arcade-favicon.ico',
  './favicon/arcade-favicon-16.png',
  './favicon/arcade-favicon-32.png',
  './favicon/arcade-favicon-180.png',
  './favicon/arcade-favicon-192.png',
  './favicon/arcade-favicon-512.png',
  './games/uptime/uptime-incident-response.html',
  './games/uptime/manifest.webmanifest',
  './games/uptime/favicon/favicon.svg',
  './games/uptime/favicon/favicon.ico',
  './games/uptime/favicon/favicon-16.png',
  './games/uptime/favicon/favicon-32.png',
  './games/uptime/favicon/favicon-180.png',
  './games/uptime/favicon/favicon-192.png',
  './games/uptime/favicon/favicon-512.png'
];

const cacheUrl = (path) => new URL(path, self.registration.scope).href;

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

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

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

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

  if (request.mode === 'navigate') {
    event.respondWith(
      fetch(request)
        .then((response) => {
          const responseCopy = response.clone();
          caches.open(CACHE_NAME).then((cache) => cache.put(request, responseCopy));
          return response;
        })
        .catch(async () => {
          const fallback = url.pathname.includes('/games/uptime/')
            ? './games/uptime/uptime-incident-response.html'
            : './index.html';

          return await caches.match(request) || await caches.match(cacheUrl(fallback));
        })
    );
    return;
  }

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

      return fetch(request).then((response) => {
        if (!response || response.status !== 200 || response.type !== 'basic') return response;

        const responseCopy = response.clone();
        caches.open(CACHE_NAME).then((cache) => cache.put(request, responseCopy));
        return response;
      });
    })
  );
});