const CACHE = 'dickendock-v1';
const ASSETS = ['/', '/index.html'];

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

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

self.addEventListener('fetch', e => {
  // API-Anfragen immer live holen
  if (e.request.url.includes('/api/')) {
    e.respondWith(fetch(e.request).catch(() => new Response('Offline', { status: 503 })));
    return;
  }
  // Alles andere: Cache first, dann Network
  e.respondWith(
    caches.match(e.request).then(cached => {
      const network = fetch(e.request).then(res => {
        if (res.ok) caches.open(CACHE).then(c => c.put(e.request, res.clone()));
        return res;
      });
      return cached || network;
    })
  );
});