// Service Worker for Claude Code UI PWA
const CACHE_NAME = 'claude-ui-v1';
const urlsToCache = [
  '/',
  '/index.html',
  '/manifest.json'
];

// Install event
self.addEventListener('install', event => {
  event.waitUntil(
    caches.open(CACHE_NAME)
      .then(cache => {
        return cache.addAll(urlsToCache);
      })
  );
  self.skipWaiting();
});

// Fetch event
self.addEventListener('fetch', event => {
  // Never cache API requests or WebSocket upgrades
  if (event.request.url.includes('/api/') || event.request.url.includes('/ws')) {
    return;
  }

  event.respondWith(
    caches.match(event.request)
      .then(response => {
        if (response) {
          return response;
        }
        return fetch(event.request);
      }
    )
  );
});

// Activate event
self.addEventListener('activate', event => {
  event.waitUntil(
    caches.keys().then(cacheNames => {
      return Promise.all(
        cacheNames.map(cacheName => {
          if (cacheName !== CACHE_NAME) {
            return caches.delete(cacheName);
          }
        })
      );
    })
  );
  self.clients.claim();
});

// Push notification event
self.addEventListener('push', event => {
  if (!event.data) return;

  let payload;
  try {
    payload = event.data.json();
  } catch {
    payload = { title: 'Claude Code UI', body: event.data.text() };
  }

  const options = {
    body: payload.body || '',
    icon: '/logo-256.png',
    badge: '/logo-128.png',
    data: payload.data || {},
    tag: payload.data?.tag || `${payload.data?.sessionId || 'global'}:${payload.data?.code || 'default'}`,
    renotify: true
  };

  event.waitUntil(
    self.registration.showNotification(payload.title || 'Claude Code UI', options)
  );
});

// Notification click event
self.addEventListener('notificationclick', event => {
  event.notification.close();

  const sessionId = event.notification.data?.sessionId;
  const provider = event.notification.data?.provider || null;
  const urlPath = sessionId ? `/session/${sessionId}` : '/';

  event.waitUntil(
    self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then(async clientList => {
      for (const client of clientList) {
        if (client.url.includes(self.location.origin)) {
          await client.focus();
          client.postMessage({
            type: 'notification:navigate',
            sessionId: sessionId || null,
            provider,
            urlPath
          });
          return;
        }
      }
      return self.clients.openWindow(urlPath);
    })
  );
});