//import UIKit
//import AVFoundation
//import WebRTC
//
//final class CallVC : UIViewController, CameraCaptureDelegate, CallManagerDelegate, WebSocketDelegate {
//    private var webSocket: WebSocket?
//    private let videoCallVC = VideoCallVC()
//    let videoCapturer: RTCVideoCapturer = RTCCameraVideoCapturer(delegate: CallManager.shared.localVideoSource)
//    private var messageQueue: [String] = []
//    private var isConnected = false {
//        didSet {
//            let title = isConnected ? "Leave" : "Join"
//            joinOrLeaveButton.setTitle(title, for: UIControl.State.normal)
//        }
//    }
//    private var currentRoomInfo: RoomInfo?
//    
//    var isInitiator: Bool {
//        return currentRoomInfo?.isInitiator == true
//    }
//    
//    // MARK: UI Components
//    private lazy var previewView: UIImageView = {
//        return UIImageView()
//    }()
//    
//    private lazy var containerView: UIView = {
//        return UIView()
//    }()
//    
//    private lazy var joinOrLeaveButton: UIButton = {
//        let result = UIButton()
//        result.setTitle("Join", for: UIControl.State.normal)
//        result.addTarget(self, action: #selector(joinOrLeave), for: UIControl.Event.touchUpInside)
//        return result
//    }()
//    
//    private lazy var roomNumberTextField: UITextField = {
//        let result = UITextField()
//        result.set(.width, to: 120)
//        result.set(.height, to: 40)
//        result.backgroundColor = UIColor.white.withAlphaComponent(0.1)
//        return result
//    }()
//    
//    private lazy var infoTextView: UITextView = {
//        let result = UITextView()
//        result.backgroundColor = UIColor.white.withAlphaComponent(0.1)
//        return result
//    }()
//    
//    // MARK: Lifecycle
//    override func viewDidLoad() {
//        super.viewDidLoad()
//        touch(CallManager.shared)
//        CallManager.shared.delegate = self
//        CameraManager.shared.delegate = self
//        CameraManager.shared.prepare()
//        addChild(videoCallVC)
//        containerView.addSubview(videoCallVC.view)
//        videoCallVC.view.translatesAutoresizingMaskIntoConstraints = false
//        videoCallVC.view.pin(to: containerView)
//        view.addSubview(containerView)
//        containerView.pin(to: view)
//        view.addSubview(joinOrLeaveButton)
//        joinOrLeaveButton.translatesAutoresizingMaskIntoConstraints = false
//        joinOrLeaveButton.pin([ UIView.VerticalEdge.top, UIView.HorizontalEdge.right ], to: view)
//        view.addSubview(roomNumberTextField)
//        roomNumberTextField.translatesAutoresizingMaskIntoConstraints = false
//        roomNumberTextField.pin([ UIView.VerticalEdge.top, UIView.HorizontalEdge.left ], to: view)
//        view.addSubview(infoTextView)
//        infoTextView.translatesAutoresizingMaskIntoConstraints = false
//        infoTextView.pin([ UIView.HorizontalEdge.left, UIView.HorizontalEdge.right ], to: view)
//        infoTextView.center(.vertical, in: view)
//        infoTextView.set(.height, to: 200)
//    }
//    
//    override func viewDidAppear(_ animated: Bool) {
//        super.viewDidAppear(animated)
//        CameraManager.shared.start()
//    }
//    
//    override func viewWillDisappear(_ animated: Bool) {
//        super.viewWillDisappear(animated)
//        CameraManager.shared.stop()
//    }
//    
//    // MARK: Interaction
//    @objc private func joinOrLeave() {
//        guard let roomID = roomNumberTextField.text, !roomID.isEmpty else { return }
//        if isConnected {
//            disconnect()
//        } else {
//            isConnected = true
//            TestCallServer.join(roomID: roomID).done2 { [weak self] info in
//                guard let self = self else { return }
//                self.log("Successfully joined room.")
//                self.currentRoomInfo = info
//                if let messages = info.messages {
//                    self.handle(messages)
//                }
//                let webSocket = WebSocket(url: URL(string: info.wssURL)!)
//                webSocket.delegate = self
//                self.webSocket = webSocket
//            }.catch2 { [weak self] error in
//                guard let self = self else { return }
//                self.isConnected = false
//                self.log("Couldn't join room due to error: \(error).")
//                SNLog("Couldn't join room due to error: \(error).")
//            }
//            roomNumberTextField.resignFirstResponder()
//        }
//    }
//    
//    private func disconnect() {
//        guard let info = currentRoomInfo else { return }
//        TestCallServer.leave(roomID: info.roomID, userID: info.clientID).done2 { [weak self] in
//            guard let self = self else { return }
//            self.log("Disconnected.")
//        }
//        let message = [ "type": "bye" ]
//        guard let data = try? JSONSerialization.data(withJSONObject: message, options: [.prettyPrinted]) else { return }
//        webSocket?.send(data)
//        webSocket?.delegate = nil
//        webSocket = nil
//        currentRoomInfo = nil
//        isConnected = false
//        CallManager.shared.endCall()
//    }
//    
//    // MARK: Message Handling
//    func handle(_ messages: [String]) {
//        messageQueue.append(contentsOf: messages)
//        drainMessageQueue()
//    }
//    
//    func drainMessageQueue() {
//        guard isConnected else { return }
//        for message in messageQueue {
//            handle(message)
//        }
//        messageQueue.removeAll()
//        CallManager.shared.drainICECandidateQueue()
//    }
//    
//    func handle(_ message: String) {
//        let signalingMessage = SignalingMessage.from(message: message)
//        switch signalingMessage {
//        case .candidate(let candidate):
//            CallManager.shared.handleCandidateMessage(candidate)
//            log("Candidate received.")
//        case .answer(let answer):
//            CallManager.shared.handleRemoteDescription(answer)
//            log("Answer received.")
//        case .offer(let offer):
//            CallManager.shared.handleRemoteDescription(offer)
//            log("Offer received.")
//        case .bye:
//            disconnect()
//        default:
//            break
//        }
//    }
//    
//    // MARK: Streaming
//    func webSocketDidConnect(_ webSocket: WebSocket) {
//        guard let info = currentRoomInfo else { return }
//        log("Connected to web socket.")
//        let message = [
//            "cmd": "register",
//            "roomid": info.roomID,
//            "clientid": info.clientID
//        ]
//        guard let data = try? JSONSerialization.data(withJSONObject: message, options: [.prettyPrinted]) else { return }
//        webSocket.send(data)
//        if isInitiator {
//            CallManager.shared.initiateCall().retainUntilComplete()
//        }
//        drainMessageQueue()
//    }
//    
//    func webSocket(_ webSocket: WebSocket, didReceive message: String) {
//        log("Received data from web socket.")
//        handle(message)
//        CallManager.shared.drainICECandidateQueue()
//    }
//    
//    func webSocketDidDisconnect(_ webSocket: WebSocket) {
//        webSocket.delegate = nil
//        log("Disconnecting from web socket.")
//    }
//    
//    func callManager(_ callManager: CallManager, sendData data: Data) {
//        guard let info = currentRoomInfo else { return }
//        TestCallServer.send(data, roomID: info.roomID, userID: info.clientID).retainUntilComplete()
//    }
//    
//    // MARK: Camera
//    func captureVideoOutput(sampleBuffer: CMSampleBuffer) {
//        guard let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else { return }
//        let ciImage = CIImage(cvImageBuffer: pixelBuffer)
//        let image = UIImage(ciImage: ciImage)
//        DispatchQueue.main.async { [weak self] in
//            self?.previewView.image = image
//        }
//    }
//    
//    // MARK: Logging
//    private func log(_ string: String) {
//        DispatchQueue.main.async { [weak self] in
//            guard let self = self else { return }
//            self.infoTextView.text = self.infoTextView.text + "\n" + string
//        }
//    }
//}