service-worker.js

const CACHE_VERSION = "2026.03.25.3";
const CACHE_NAME = `time-tracker-${CACHE_VERSION}`;

const APP_SHELL = [
  "./",
  "./index.html",
  "./styles.css",
  "./app.js",
  "./constants.js",
  "./state.js",
  "./utils.js",
  "./render.js",
  "./logs.js",
  "./backup.js",
  "./modals.js",
  "./actions.js",
  "./manifest.json",
  "./icons/icon-192.png",
  "./icons/icon-512.png"
];

self.addEventListener("install", (event) => {
  console.log("Service Worker installing...");

  event.waitUntil(
    caches.open(CACHE_NAME).then((cache) => {
      return cache.addAll(APP_SHELL);
    })
  );
});

self.addEventListener("activate", (event) => {
  console.log("Service Worker activating...");

  event.waitUntil(
    caches.keys().then((keys) =>
      Promise.all(
        keys
          .filter((key) => key !== CACHE_NAME)
          .map((key) => caches.delete(key))
      )
    )
  );

  self.clients.claim();
});

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

  if (request.method !== "GET") return;

  const requestUrl = new URL(request.url);
  if (requestUrl.origin !== self.location.origin) return;

  event.respondWith(
    caches.match(request).then((cachedResponse) => {
      if (cachedResponse) return cachedResponse;

      return fetch(request).then((networkResponse) => {
        if (!networkResponse || networkResponse.status !== 200) {
          return networkResponse;
        }

        const responseClone = networkResponse.clone();

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

        return networkResponse;
      });
    })
  );
});

self.addEventListener("message", (event) => {
  if (event.data && event.data.type === "SKIP_WAITING") {
    self.skipWaiting();
  }
});