const CACHE = 'life-os-shell-v1.5.0';
const SHELL = [
  '/', '/index.html', '/manifest.webmanifest', '/life-os-icon.svg',
  '/boot-guard.js', '/i18n.js', '/tasks.js?v=1.5.0', '/calendar.js?v=1.5.0', '/i18n-renderers.js', '/addons.js?v=1.5.0'
];

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(key => key.startsWith('life-os-shell-') && key !== CACHE).map(key => caches.delete(key)))).then(() => self.clients.claim()));
});

self.addEventListener('fetch', event => {
  const request = event.request;
  if (request.method !== 'GET' || new URL(request.url).origin !== self.location.origin) return;
  const url = new URL(request.url);
  if (url.pathname.startsWith('/api/')) return;
  if (request.mode === 'navigate') {
    event.respondWith(fetch(request).then(response => {
      const copy = response.clone();
      caches.open(CACHE).then(cache => cache.put('/index.html', copy));
      return response;
    }).catch(() => caches.match('/index.html')));
    return;
  }
  event.respondWith(caches.match(request).then(cached => cached || fetch(request).then(response => {
    if (response.ok) caches.open(CACHE).then(cache => cache.put(request, response.clone()));
    return response;
  })));
});