const CACHE_NAME = 'lonely-mouth-v3';
const ASSETS = ['/manifest.json'];

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

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

// Network first — never serve stale HTML or JS from cache
self.addEventListener('fetch', e => {
  if (e.request.mode === 'navigate') {
    // Always fetch fresh HTML from network
    e.respondWith(fetch(e.request));
    return;
  }
  e.respondWith(
    fetch(e.request).catch(() => caches.match(e.request))
  );
});