const CACHE_NAME = 'tsl-embedded-pwa-v12';

const APP_SHELL = [
  '/',
  '/admin.html',
  '/setup.html',
  '/manifest.webmanifest',
  '/css/app.css',
  '/css/setup.css',
  '/js/app.js',
  '/js/setup.js',
  '/js/pwa.js',
  '/components/status-card.js',
  '/components/uptime-card.js',
  '/components/led-card.js',
  '/components/add-card.js',
  '/icons/icon.svg',
  '/icons/icon-192.png',
  '/icons/icon-512.png'
];

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

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

self.addEventListener('fetch', event => {
  const requestUrl = new URL(event.request.url);
  if (requestUrl.origin !== location.origin || requestUrl.pathname.startsWith('/api/')) return;

  if (event.request.mode === 'navigate') {
    event.respondWith(fetch(event.request).catch(() => caches.match('/admin.html')));
    return;
  }

  event.respondWith(
    caches.match(event.request).then(cached => cached || fetch(event.request).then(response => {
      if (!response || response.status !== 200 || event.request.method !== 'GET') return response;
      const copy = response.clone();
      caches.open(CACHE_NAME).then(cache => cache.put(event.request, copy));
      return response;
    }))
  );
});