// 爱马仕 Hermes · 轻量 Service Worker
// 静态壳走 network-first（拿不到再回退缓存），API 直通
const CACHE = "hermes-ui-v16";
const ASSETS = [
  "./",
  "./index.html",
  "./styles.css",
  "./app.js",
  "./manifest.webmanifest",
  "./icon.svg",
];

self.addEventListener("install", (e) => {
  e.waitUntil(caches.open(CACHE).then((c) => c.addAll(ASSETS)));
  self.skipWaiting();
});

self.addEventListener("activate", (e) => {
  e.waitUntil(
    caches.keys().then((keys) =>
      Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k)))
    )
  );
  self.clients.claim();
});

self.addEventListener("fetch", (e) => {
  const url = new URL(e.request.url);
  // API / 鉴权 / skill 索引等动态资源全部直通
  if (url.pathname.startsWith("/api/")) return;
  if (url.pathname.startsWith("/_auth/")) return;
  if (url.pathname.startsWith("/feishu/")) return;
  if (url.pathname.startsWith("/hermes-skills/")) return;
  if (e.request.method !== "GET") return;

  // 静态壳：network-first，离线再回退到缓存
  e.respondWith(
    fetch(e.request)
      .then((res) => {
        if (res && res.ok) {
          const copy = res.clone();
          caches.open(CACHE).then((c) => c.put(e.request, copy)).catch(() => {});
        }
        return res;
      })
      .catch(() => caches.match(e.request).then((hit) => hit || Response.error()))
  );
});