const CACHE_NAME = 'pawmatch-v1';
const urlsToCache = [
    './',
    './manifest.json',
    './icon-192.png',  
    './icon-512.png'   
];

self.addEventListener('install', function(event) {
    console.log('[SW] Service Worker 安裝中...');
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then(function(cache) {
                console.log('[SW] 快取開啟成功');
                return cache.addAll(urlsToCache);
            })
            .catch(function(error) {
                console.error('[SW] 快取失敗:', error);
            })
    );
});

self.addEventListener('fetch', function(event) {
    console.log('[SW] 攔截請求:', event.request.url);
    event.respondWith(
        caches.match(event.request)
            .then(function(response) {
                if (response) {
                    console.log('[SW] 從快取回應:', event.request.url);
                    return response;
                }
                console.log('[SW] 從網路取得:', event.request.url);
                return fetch(event.request);
            })
    );
});