const CACHE_NAME = "homarr-site-v2";
const SHELL_PATHS = ["/", "/workshop/", "/docs/management/workshop/", "/img/logo.png"];

self.addEventListener("install", (event) => {
  event.waitUntil(
    caches.open(CACHE_NAME).then(async (cache) => {
      const manifest = await fetch("/workshop-assets.json")
        .then((response) => response.json())
        .catch(() => []);
      await Promise.allSettled([...SHELL_PATHS, ...manifest].map((path) => cache.add(path)));
    }),
  );
  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.request;
  const url = new URL(request.url);
  if (request.method !== "GET" || url.origin !== self.location.origin || url.pathname.startsWith("/api/")) return;

  event.respondWith(
    fetch(request)
      .then((response) => {
        if (response.ok) {
          const copy = response.clone();
          event.waitUntil(caches.open(CACHE_NAME).then((cache) => cache.put(request, copy)));
        }
        return response;
      })
      .catch(async () => {
        const cached = await caches.match(request);
        if (cached) return cached;
        if (request.mode === "navigate") return (await caches.match("/workshop/")) ?? Response.error();
        return Response.error();
      }),
  );
});