const CACHE = 'apoena-v2';

self.addEventListener('install', e => {
  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);

  // Pass through API calls
  if (url.pathname === '/extract-audio') return;

  // Network-first: always fetch fresh content, update cache, fall back offline
  e.respondWith(
    fetch(e.request)
      .then(res => {
        const clone = res.clone();
        caches.open(CACHE).then(c => c.put(e.request, clone));
        return res;
      })
      .catch(() => caches.match(e.request))
  );
});