/*
 * TaskStream's service worker: push notifications only. It caches nothing,
 * so a new deploy never leaves an old version of the app behind.
 *
 * The API sends `{ title, body, url, tag }` (see Notifier's payloadOf).
 */
self.addEventListener('install', () => self.skipWaiting());
self.addEventListener('activate', (event) =>
  event.waitUntil(self.clients.claim()),
);

self.addEventListener('push', (event) => {
  let data = {};
  try {
    data = event.data ? event.data.json() : {};
  } catch {
    data = { body: event.data ? event.data.text() : '' };
  }
  event.waitUntil(
    self.registration.showNotification(data.title || 'TaskStream', {
      body: data.body || '',
      tag: data.tag,
      icon: '/logo-192.png',
      badge: '/logo-96.png',
      data: { url: data.url || '/' },
    }),
  );
});

// A tap opens the ticket: in a TaskStream tab already open, or in a new one.
self.addEventListener('notificationclick', (event) => {
  event.notification.close();
  const target = new URL(
    event.notification.data?.url || '/',
    self.location.origin,
  ).href;
  event.waitUntil(
    self.clients
      .matchAll({ type: 'window', includeUncontrolled: true })
      .then((tabs) => {
        for (const tab of tabs) {
          if (
            new URL(tab.url).origin === self.location.origin &&
            'focus' in tab
          ) {
            return tab.focus().then(() => tab.navigate(target));
          }
        }
        return self.clients.openWindow(target);
      }),
  );
});