/* Sovereign site service worker — app-shell cache for the PWA.
 * Cache-first for the static shell; network-first for API calls. */
const CACHE = 'sovereign-v1';
const SHELL = [
  './',
  'index.html',
  'dashboard.html',
  'chat.html',
  'pec5d.html',
  'kyrexis.html',
  'coldcase.html',
  'manifest.webmanifest'
];

self.addEventListener('install', (event) => {
  event.waitUntil(
    caches.open(CACHE).then((cache) => cache.addAll(SHELL)).then(() => self.skipWaiting())
  );
});

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

self.addEventListener('fetch', (event) => {
  const url = new URL(event.request.url);
  // API calls: network-first, no cache fallback (fresh data matters)
  if (url.pathname.includes('/api/')) {
    return;
  }
  event.respondWith(
    caches.match(event.request).then((cached) => {
      if (cached) return cached;
      return fetch(event.request).then((response) => {
        const clone = response.clone();
        caches.open(CACHE).then((cache) => cache.put(event.request, clone));
        return response;
      });
    })
  );
});