1// Service Worker for PWA support
 2const CACHE_NAME = 'clicker-game-cache-v1';
 3const urlsToCache = [
 4  '/',
 5  '/index.html',
 6  '/favicon.svg',
 7  '/manifest.json',
 8  '/icons/icon-192x192.png',
 9  '/icons/icon-512x512.png'
10];
11
12// Install the service worker and cache assets
13self.addEventListener('install', (event) => {
14  event.waitUntil(
15    caches.open(CACHE_NAME)
16      .then((cache) => {
17        return cache.addAll(urlsToCache);
18      })
19  );
20});
21
22// Activate and clean up old caches
23self.addEventListener('activate', (event) => {
24  event.waitUntil(
25    caches.keys().then((cacheNames) => {
26      return Promise.all(
27        cacheNames.map((cacheName) => {
28          if (cacheName !== CACHE_NAME) {
29            return caches.delete(cacheName);
30          }
31        })
32      );
33    })
34  );
35});
36
37// Serve cached content when offline
38self.addEventListener('fetch', (event) => {
39  event.respondWith(
40    caches.match(event.request)
41      .then((response) => {
42        // Cache hit - return the response from the cached version
43        if (response) {
44          return response;
45        }
46        
47        // Not in cache - fetch from network
48        return fetch(event.request).then(
49          (response) => {
50            // Check if we received a valid response
51            if (!response || response.status !== 200 || response.type !== 'basic') {
52              return response;
53            }
54
55            // Clone the response
56            const responseToCache = response.clone();
57
58            // Add to cache for future use
59            caches.open(CACHE_NAME)
60              .then((cache) => {
61                cache.put(event.request, responseToCache);
62              });
63
64            return response;
65          }
66        );
67      })
68  );
69});