// WebRTC One-to-One Video Call
class VideoCall {
  private localStream: MediaStream | null = null;
  private peerConnection: RTCPeerConnection;
  
  constructor() {
    this.peerConnection = new RTCPeerConnection({
      iceServers: [
        { urls: 'stun:stun.l.google.com:19302' },
        { urls: 'turn:turnserver.com', username: 'user', credential: 'pass' }
      ]
    });
  }
  
  async startCall() {
    // Get user media
    this.localStream = await navigator.mediaDevices.getUserMedia({
      video: true,
      audio: true
    });
    
    // Add tracks to peer connection
    this.localStream.getTracks().forEach(track => {
      this.peerConnection.addTrack(track, this.localStream!);
    });
    
    // Handle remote stream
    this.peerConnection.ontrack = (event) => {
      const remoteVideo = document.getElementById('remoteVideo') as HTMLVideoElement;
      remoteVideo.srcObject = event.streams[0];
    };
    
    // Create and send offer
    const offer = await this.peerConnection.createOffer();
    await this.peerConnection.setLocalDescription(offer);
    await this.sendSignal('offer', offer);
  }
  
  async handleAnswer(answer: RTCSessionDescriptionInit) {
    await this.peerConnection.setRemoteDescription(answer);
  }
  
  async handleICE(candidate: RTCIceCandidateInit) {
    await this.peerConnection.addIceCandidate(candidate);
  }
}