const CACHE_NAME = 'mycondominium-v3';
const ASSETS_TO_CACHE = [
    './',
    './index.html',
    './style.css',
    './script.js',
    'https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css',
    'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css',
    'https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js',
    'https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2',
    'https://cdn.jsdelivr.net/npm/chart.js',
    'https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js',
    'https://cdnjs.cloudflare.com/ajax/libs/jspdf-autotable/3.5.23/jspdf.plugin.autotable.min.js'
];

self.addEventListener('install', (event) => {
    self.skipWaiting(); // Force the waiting service worker to become the active service worker.
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then((cache) => cache.addAll(ASSETS_TO_CACHE))
    );
});

self.addEventListener('activate', (event) => {
    event.waitUntil(clients.claim()); // Claim clients immediately so updates are visible without reloading all tabs
    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cacheName) => {
                    if (cacheName !== CACHE_NAME) {
                        return caches.delete(cacheName);
                    }
                })
            );
        })
    );
});

self.addEventListener('fetch', (event) => {
    // Network First strategy: try network, if it fails, fallback to cache
    event.respondWith(
        fetch(event.request).then((networkResponse) => {
            // If request is successful, update the cache
            if (networkResponse && networkResponse.status === 200 && event.request.method === 'GET') {
                const responseToCache = networkResponse.clone();
                caches.open(CACHE_NAME).then((cache) => {
                    cache.put(event.request, responseToCache);
                });
            }
            return networkResponse;
        }).catch(() => {
            // If network fails (offline), return cached version
            return caches.match(event.request);
        })
    );
});