// Service Worker – index.html immer frisch vom Server, Assets gecacht
const CACHE_NAME = 'dickendock-v3';

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

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

self.addEventListener('fetch', e => {
  const url = new URL(e.request.url);

  // API: immer Netzwerk
  if (url.pathname.startsWith('/api/')) {
    e.respondWith(fetch(e.request));
    return;
  }

  // HTML-Navigation: immer frisch vom Server, nie aus Cache
  if (e.request.mode === 'navigate') {
    e.respondWith(
      fetch(e.request, { cache: 'no-store' })
        .catch(() => caches.match('/index.html'))
    );
    return;
  }

  // Statische Assets (JS/CSS mit Hash): Network-first, Cache als Fallback
  e.respondWith(
    fetch(e.request)
      .then(res => {
        if (res.ok) {
          caches.open(CACHE_NAME).then(c => c.put(e.request, res.clone()));
        }
        return res;
      })
      .catch(() => caches.match(e.request))
  );
});

self.addEventListener('message', e => {
  if (e.data === 'SKIP_WAITING') self.skipWaiting();
});