// Service Worker for Quiet Thanks PWA
const CACHE_NAME = 'quiet-thanks-v1';

// Install event - cache essential assets
self.addEventListener('install', (event) => {
  console.log('[SW] Installing service worker...');
  self.skipWaiting();
});

// Activate event - clean up old caches
self.addEventListener('activate', (event) => {
  console.log('[SW] Activating service worker...');
  event.waitUntil(clients.claim());
});

// Push event - handle incoming push notifications
self.addEventListener('push', (event) => {
  console.log('[SW] Push event received');

  let data = {
    title: 'Quiet Thanks',
    body: 'Take a moment to reflect on what you\'re grateful for today.',
    icon: '/icons/icon.svg',
    badge: '/icons/icon.svg',
    tag: 'daily-reminder',
  };

  if (event.data) {
    try {
      const payload = event.data.json();
      data = { ...data, ...payload };
    } catch (e) {
      data.body = event.data.text();
    }
  }

  const options = {
    body: data.body,
    icon: data.icon,
    badge: data.badge,
    tag: data.tag,
    vibrate: [100, 50, 100],
    data: {
      url: '/',
    },
    actions: [
      { action: 'open', title: 'Open app' },
      { action: 'dismiss', title: 'Dismiss' },
    ],
  };

  event.waitUntil(
    self.registration.showNotification(data.title, options)
  );
});

// Notification click handler
self.addEventListener('notificationclick', (event) => {
  console.log('[SW] Notification clicked');
  event.notification.close();

  if (event.action === 'dismiss') {
    return;
  }

  event.waitUntil(
    clients.matchAll({ type: 'window', includeUncontrolled: true })
      .then((clientList) => {
        // Focus existing window if available
        for (const client of clientList) {
          if (client.url.includes(self.registration.scope) && 'focus' in client) {
            return client.focus();
          }
        }
        // Open new window
        if (clients.openWindow) {
          return clients.openWindow('/');
        }
      })
  );
});

// Periodic sync for background reminders (when supported)
self.addEventListener('periodicsync', (event) => {
  if (event.tag === 'daily-reminder') {
    event.waitUntil(checkAndShowReminder());
  }
});

async function checkAndShowReminder() {
  // This would check the reminder time and show notification if appropriate
  // For now, we rely on the client-side scheduler
  console.log('[SW] Periodic sync triggered');
}