const CACHE_NAME = 'financial-static-v1';
const STATIC_ASSETS = [
  '/offline.html',
  '/assets/vendor/bootstrap.min.css',
  '/assets/vendor/bootstrap.bundle.min.js',
  '/assets/vendor/chart.umd.js',
  '/assets/app.css',
  '/assets/pwa.js',
  '/favicon.png?v=2',
  '/manifest.webmanifest'
];

self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => cache.addAll(STATIC_ASSETS))
      .catch(() => undefined)
  );
  self.skipWaiting();
});

self.addEventListener('activate', event => {
  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.request;

  if (request.method !== 'GET') {
    return;
  }

  const url = new URL(request.url);

  if (url.origin !== location.origin) {
    return;
  }

  if (url.pathname.startsWith('/api/')) {
    return;
  }

  if (url.pathname.startsWith('/assets/vendor/') || url.pathname === '/assets/app.css' || url.pathname === '/assets/pwa.js' || url.pathname === '/manifest.webmanifest' || url.pathname === '/favicon.png') {
    event.respondWith(
      caches.match(request).then(cached => cached || fetch(request))
    );
    return;
  }

  if (request.mode === 'navigate') {
    event.respondWith(
      fetch(request).catch(() => caches.match('/offline.html'))
    );
  }
});