/// <reference lib="webworker" />
declare const self: ServiceWorkerGlobalScope;

import { clientsClaim } from 'workbox-core';
import { cleanupOutdatedCaches, precacheAndRoute } from 'workbox-precaching';
import { registerRoute } from 'workbox-routing';
import { StaleWhileRevalidate, CacheFirst, NetworkFirst } from 'workbox-strategies';
import { ExpirationPlugin } from 'workbox-expiration';
import { CacheableResponsePlugin } from 'workbox-cacheable-response';

// Precache all assets generated by Vite build
precacheAndRoute(self.__WB_MANIFEST);

cleanupOutdatedCaches();

// Cache Google Fonts stylesheets
registerRoute(
  ({ url }) => url.origin === 'https://fonts.googleapis.com',
  new StaleWhileRevalidate({
    cacheName: 'google-fonts-stylesheets',
  })
);

// Cache Google Fonts webfont files with 1-year expiration
registerRoute(
  ({ url }) => url.origin === 'https://fonts.gstatic.com',
  new CacheFirst({
    cacheName: 'google-fonts-webfonts',
    plugins: [
      new CacheableResponsePlugin({
        statuses: [0, 200],
      }),
      new ExpirationPlugin({
        maxAgeSeconds: 60 * 60 * 24 * 365,
        maxEntries: 30,
      }),
    ],
  })
);

// Cache static images and icons
registerRoute(
  ({ request }) => request.destination === 'image',
  new CacheFirst({
    cacheName: 'images-cache',
    plugins: [
      new CacheableResponsePlugin({
        statuses: [0, 200],
      }),
      new ExpirationPlugin({
        maxEntries: 60,
        maxAgeSeconds: 30 * 24 * 60 * 60, // 30 Days
      }),
    ],
  })
);

// Force immediate activation of new SW
self.addEventListener('install', () => {
  console.log('[SW] Installing Cognitive Clarity PWA Service Worker...');
  self.skipWaiting();
});

self.addEventListener('activate', () => {
  console.log('[SW] Activating Cognitive Clarity PWA Service Worker...');
  clientsClaim();
});

// Handle explicit SKIP_WAITING message from client UI
self.addEventListener('message', (event) => {
  if (event.data?.type === 'SKIP_WAITING') {
    self.skipWaiting();
  }
});