const CACHE_NAME = 'video-cache-v1';

self.addEventListener('install', (event) => {
    self.skipWaiting();
});

self.addEventListener('activate', (event) => {
    event.waitUntil(
        caches.keys().then((cacheNames) => {
            return Promise.all(
                cacheNames.map((cacheName) => {
                    if (cacheName !== CACHE_NAME) {
                        return caches.delete(cacheName);
                    }
                })
            );
        }).then(() => self.clients.claim())
    );
});

self.addEventListener('fetch', (event) => {
    const url = new URL(event.request.url);

    // Intercept .ts file requests
    if (url.pathname.endsWith('.ts')) {
        event.respondWith(
            caches.match(event.request, { ignoreSearch: true }).then((response) => {
                // Cache hit - return response
                if (response) {
                    return response;
                }

                // Clone the request because it's a stream and can only be consumed once
                const fetchRequest = event.request.clone();

                return fetch(fetchRequest).then((response) => {
                    // Check if we received a valid response
                    if (!response || response.status !== 200 || response.type !== 'basic') {
                        return response;
                    }

                    // Clone the response because it's a stream
                    const responseToCache = response.clone();

                    caches.open(CACHE_NAME).then((cache) => {
                        cache.put(event.request, responseToCache);
                    });

                    return response;
                });
            })
        );
    }
});