// Worker Bridge - Manages parallel workers for ArchDroid
class WorkerBridge {
  constructor() {
    this.workers = new Map();
    this.messageQueue = [];
    this.callbacks = new Map();
    this.callbackId = 0;
    
    this.initWorkers();
    this.setupServiceWorker();
  }
  
  initWorkers() {
    const workerConfigs = [
      { name: 'settings', url: 'workers/settings-worker.js' },
      { name: 'apps', url: 'workers/app-data-worker.js' },
      { name: 'gestures', url: 'workers/gesture-worker.js' },
      { name: 'notifications', url: 'workers/notification-worker.js' },
      { name: 'system', url: 'workers/system-sync-worker.js' }
    ];
    
    workerConfigs.forEach(({ name, url }) => {
      try {
        const worker = new Worker(url);
        worker.onmessage = (e) => this.handleWorkerMessage(name, e.data);
        worker.onerror = (e) => console.error(`Worker ${name} error:`, e);
        this.workers.set(name, worker);
      } catch (err) {
        console.warn(`Failed to create worker ${name}:`, err);
      }
    });
  }
  
  async setupServiceWorker() {
    if ('serviceWorker' in navigator) {
      try {
        const reg = await navigator.serviceWorker.register('/sw.js');
        console.log('SW registered:', reg);
        
        navigator.serviceWorker.addEventListener('message', (e) => {
          this.handleServiceWorkerMessage(e.data);
        });
        
        // Request background sync
        if ('sync' in reg) {
          await reg.sync.register('settings-sync');
        }
      } catch (err) {
        console.error('SW registration failed:', err);
      }
    }
  }
  
  postToWorker(workerName, message, transferables = []) {
    const worker = this.workers.get(workerName);
    if (!worker) {
      console.warn(`Worker ${workerName} not available`);
      return Promise.reject(new Error('Worker not available'));
    }
    
    return new Promise((resolve) => {
      const id = ++this.callbackId;
      this.callbacks.set(id, resolve);
      
      worker.postMessage({
        ...message,
        _callbackId: id,
        _workerName: workerName
      }, transferables);
    });
  }
  
  handleWorkerMessage(workerName, data) {
    // Resolve pending callback if exists
    if (data._callbackId) {
      const callback = this.callbacks.get(data._callbackId);
      if (callback) {
        callback(data);
        this.callbacks.delete(data._callbackId);
        return;
      }
    }
    
    // Broadcast to window
    const event = new CustomEvent(`worker:${workerName}`, {
      detail: data
    });
    window.dispatchEvent(event);
    
    // Also dispatch to specific handlers
    this.routeWorkerMessage(workerName, data);
  }
  
  routeWorkerMessage(workerName, data) {
    switch (workerName) {
      case 'settings':
        window.dispatchEvent(new CustomEvent('settings-updated', { detail: data }));
        break;
      case 'apps':
        window.dispatchEvent(new CustomEvent('apps-loaded', { detail: data }));
        break;
      case 'gestures':
        window.dispatchEvent(new CustomEvent('gesture', { detail: data.gesture }));
        break;
      case 'notifications':
        window.dispatchEvent(new CustomEvent('notifications-updated', { detail: data }));
        break;
      case 'system':
        window.dispatchEvent(new CustomEvent('system-status', { detail: data }));
        break;
    }
  }
  
  handleServiceWorkerMessage(data) {
    window.dispatchEvent(new CustomEvent('sw-message', { detail: data }));
  }
  
  // Public API methods
  async fetchSettings() {
    return this.postToWorker('settings', { action: 'READ_ALL' });
  }
  
  async watchSetting(key) {
    this.postToWorker('settings', { action: 'WATCH', settings: { key } });
  }
  
  async fetchApps() {
    return this.postToWorker('apps', { action: 'FETCH_ALL' });
  }
  
  async searchApps(query) {
    return this.postToWorker('apps', { action: 'SEARCH', filter: { query } });
  }
  
  async launchApp(packageName) {
    return this.postToWorker('apps', { action: 'LAUNCH_APP', filter: { package: packageName } });
  }
  
  processGesture(type, event) {
    this.postToWorker('gestures', { type, event });
  }
  
  async fetchNotifications() {
    return this.postToWorker('notifications', { action: 'FETCH' });
  }
  
  clearNotification(id) {
    this.postToWorker('notifications', { action: 'CLEAR', data: { id } });
  }
  
  startSystemSync() {
    this.postToWorker('system', { action: 'START_SYNC' });
  }
  
  stopSystemSync() {
    this.postToWorker('system', { action: 'STOP_SYNC' });
  }
}

// Initialize bridge
window.workerBridge = new WorkerBridge();