const CACHE = 'birdoogle-v1';
const STATIC = [
  '/',
  '/index.html',
  '/manifest.json',
  '/icons/icon-192.png',
  '/icons/icon-512.png',
  'https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700&family=Lato:wght@400;700&display=swap',
  'https://cdnjs.cloudflare.com/ajax/libs/react/18.2.0/umd/react.development.js',
  'https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.2.0/umd/react-dom.development.js',
  'https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/7.23.2/babel.min.js'
];

// Install — cache all static assets
self.addEventListener('install', e => {
  e.waitUntil(
    caches.open(CACHE).then(cache => cache.addAll(STATIC)).then(() => self.skipWaiting())
  );
});

// Activate — clean up old caches
self.addEventListener('activate', e => {
  e.waitUntil(
    caches.keys().then(keys =>
      Promise.all(keys.filter(k => k !== CACHE).map(k => caches.delete(k)))
    ).then(() => self.clients.claim())
  );
});

// Fetch — cache-first for static, network-first for API calls
self.addEventListener('fetch', e => {
  const url = new URL(e.request.url);

  // Never intercept Anthropic API calls
  if (url.hostname === 'api.anthropic.com') return;

  // Network-first for Google Fonts (so updates come through)
  if (url.hostname === 'fonts.googleapis.com' || url.hostname === 'fonts.gstatic.com') {
    e.respondWith(
      fetch(e.request).catch(() => caches.match(e.request))
    );
    return;
  }

  // Cache-first for everything else
  e.respondWith(
    caches.match(e.request).then(cached => {
      if (cached) return cached;
      return fetch(e.request).then(res => {
        if (res && res.status === 200 && res.type !== 'opaque') {
          const clone = res.clone();
          caches.open(CACHE).then(cache => cache.put(e.request, clone));
        }
        return res;
      }).catch(() => {
        // Offline fallback for navigation requests
        if (e.request.mode === 'navigate') return caches.match('/index.html');
      });
    })
  );
});