const CACHE_NAME = "rave-budget-control-v1";
const APP_SHELL = ["/", "/login", "/icon.svg", "/manifest.webmanifest"];

self.addEventListener("install", (event) => {
  event.waitUntil(
    caches
      .open(CACHE_NAME)
      .then((cache) => cache.addAll(APP_SHELL))
      .then(() => self.skipWaiting())
  );
});

self.addEventListener("activate", (event) => {
  event.waitUntil(
    caches.keys().then((cacheNames) =>
      Promise.all(cacheNames.filter((cacheName) => cacheName !== CACHE_NAME).map((cacheName) => caches.delete(cacheName)))
    )
  );
});

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

  if (request.method !== "GET" || url.pathname.startsWith("/api")) {
    return;
  }

  event.respondWith(
    fetch(request)
      .then((response) => {
        const responseClone = response.clone();

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

        return response;
      })
      .catch(async () => {
        const cached = await caches.match(request);
        return cached ?? caches.match("/");
      })
  );
});