// Service Worker — 离线缓存 + 推送通知
const CACHE_NAME = 'scilit-oncology-v1';
const STATIC_ASSETS = ['/', '/app/feed', '/app/search', '/app/library'];

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

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

self.addEventListener('fetch', (event) => {
  const req = (event as FetchEvent).request;
  // API 请求不缓存
  if (req.url.includes('/api/')) return;
  (event as any).respondWith(
    caches.match(req).then((cached) => cached || fetch(req))
  );
});