/// <reference types="@sveltejs/kit" />
/// <reference lib="webworker" />

import { build, files, version } from '$service-worker';

const sw = self as unknown as ServiceWorkerGlobalScope;
const CACHE = `pronos-nfl-${version}`;

// Uniquement la coquille statique : toutes les donnees (pronostics, scores,
// classements) restent servies par le reseau, jamais depuis le cache.
const ASSETS = [...build, ...files];

sw.addEventListener('install', (event) => {
	event.waitUntil(
		caches
			.open(CACHE)
			.then((cache) => cache.addAll(ASSETS))
			.then(() => sw.skipWaiting())
	);
});

sw.addEventListener('activate', (event) => {
	event.waitUntil(
		caches
			.keys()
			.then((keys) => Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k))))
			.then(() => sw.clients.claim())
	);
});

sw.addEventListener('fetch', (event) => {
	const request = event.request;
	if (request.method !== 'GET') return;

	const url = new URL(request.url);
	if (url.origin !== location.origin) return;
	if (!ASSETS.includes(url.pathname)) return;

	event.respondWith(
		caches.match(request).then((cached) => cached ?? fetch(request))
	);
});