const CONTENT_CACHE_NAME = "healer-man-content-v1";
const MANAGED_ASSET_PREFIXES = [
  "/assets/characters/",
  "/assets/creatures/",
  "/assets/equipment/",
  "/assets/game/",
  "/assets/ui/",
];
const BUNDLED_ASSET_PREFIXES = [
  "/assets/ui/",
  "/assets/equipment/",
  "/assets/characters/wow335a-v1/manifest.json",
  "/assets/characters/wow335a-v1/human/",
  "/assets/creatures/wailing-caverns/",
  "/assets/game/arenas/",
  "/assets/game/dungeons/wailing-caverns/",
];
const BUNDLED_ASSET_PATHS = new Set([
  "/assets/characters/wow335a-v1/textures/character/human/faciallowerhair00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/facialupperhair00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/female/humanfemalefacelower00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/female/humanfemalefaceupper00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/female/humanfemalenakedpelvisskin00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/female/humanfemalenakedtorsoskin00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/female/humanfemaleskin00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/hair00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/male/humanmalefacelower00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/male/humanmalefaceupper00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/male/humanmalenakedpelvisskin00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/male/humanmaleskin00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/scalplowerhair00_00.webp",
  "/assets/characters/wow335a-v1/textures/character/human/scalpupperhair00_00.webp",
]);

self.addEventListener("install", (event) => {
  event.waitUntil(self.skipWaiting());
});

self.addEventListener("activate", (event) => {
  event.waitUntil((async () => {
    const names = await caches.keys();
    await Promise.all(names
      .filter((name) => name.startsWith(`${CONTENT_CACHE_NAME}-staging-`))
      .map((name) => caches.delete(name)));
    await self.clients.claim();
  })());
});

self.addEventListener("fetch", (event) => {
  const { request } = event;
  if (request.method !== "GET") return;
  const url = new URL(request.url);
  if (url.origin !== self.location.origin
    || !MANAGED_ASSET_PREFIXES.some((prefix) => url.pathname.startsWith(prefix))) return;

  event.respondWith((async () => {
    const cache = await caches.open(CONTENT_CACHE_NAME);
    const cached = await cache.match(request, { ignoreSearch: true });
    if (cached) return cached;
    if (BUNDLED_ASSET_PATHS.has(url.pathname)
      || BUNDLED_ASSET_PREFIXES.some((prefix) => url.pathname.startsWith(prefix))) {
      return fetch(request);
    }
    return new Response("Optional content is not installed.", {
      status: 404,
      headers: { "content-type": "text/plain; charset=utf-8" },
    });
  })());
});