////
////  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
////
//
//import Foundation
//import PromiseKit
//import CallKit
//import SignalUtilitiesKit
//import SignalUtilitiesKit
//import WebRTC
//
//protocol CallUIAdaptee {
//    var notificationPresenter: NotificationPresenter { get }
//    var callService: CallService { get }
//    var hasManualRinger: Bool { get }
//
//    func startOutgoingCall(handle: String) -> SignalCall
//    func reportIncomingCall(_ call: SignalCall, callerName: String)
//    func reportMissedCall(_ call: SignalCall, callerName: String)
//    func answerCall(localId: UUID)
//    func answerCall(_ call: SignalCall)
//    func declineCall(localId: UUID)
//    func declineCall(_ call: SignalCall)
//    func recipientAcceptedCall(_ call: SignalCall)
//    func localHangupCall(_ call: SignalCall)
//    func remoteDidHangupCall(_ call: SignalCall)
//    func remoteBusy(_ call: SignalCall)
//    func failCall(_ call: SignalCall, error: CallError)
//    func setIsMuted(call: SignalCall, isMuted: Bool)
//    func setHasLocalVideo(call: SignalCall, hasLocalVideo: Bool)
//    func startAndShowOutgoingCall(recipientId: String, hasLocalVideo: Bool)
//}
//
//// Shared default implementations
//extension CallUIAdaptee {
//    internal func showCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        let callViewController = CallViewController(call: call)
//        callViewController.modalTransitionStyle = .crossDissolve
//
//        if CallViewController.kShowCallViewOnSeparateWindow {
//            OWSWindowManager.shared().startCall(callViewController)
//        } else {
//            guard let presentingViewController = UIApplication.shared.frontmostViewControllerIgnoringAlerts else {
//                owsFailDebug("view controller unexpectedly nil")
//                return
//            }
//
//            if let presentedViewController = presentingViewController.presentedViewController {
//                presentedViewController.dismiss(animated: false) {
//                    presentingViewController.present(callViewController, animated: true)
//                }
//            } else {
//                presentingViewController.present(callViewController, animated: true)
//            }
//        }
//    }
//
//    internal func reportMissedCall(_ call: SignalCall, callerName: String) {
//        AssertIsOnMainThread()
//
//        notificationPresenter.presentMissedCall(call, callerName: callerName)
//    }
//
//    internal func startAndShowOutgoingCall(recipientId: String, hasLocalVideo: Bool) {
//        AssertIsOnMainThread()
//
//        guard self.callService.call == nil else {
//            owsFailDebug("unexpectedly found an existing call when trying to start outgoing call: \(recipientId)")
//            return
//        }
//
//        let call = self.startOutgoingCall(handle: recipientId)
//        call.hasLocalVideo = hasLocalVideo
//        self.showCall(call)
//    }
//}
//
///**
// * Notify the user of call related activities.
// * Driven by either a CallKit or System notifications adaptee
// */
//@objc public class CallUIAdapter: NSObject, CallServiceObserver {
//
//    private let adaptee: CallUIAdaptee
//    private let contactsManager: OWSContactsManager
//    internal let audioService: CallAudioService
//    internal let callService: CallService
//
//    public required init(callService: CallService, contactsManager: OWSContactsManager, notificationPresenter: NotificationPresenter) {
//        AssertIsOnMainThread()
//
//        self.contactsManager = contactsManager
//        self.callService = callService
//
//        if Platform.isSimulator {
//            // CallKit doesn't seem entirely supported in simulator.
//            // e.g. you can't receive calls in the call screen.
//            // So we use the non-CallKit call UI.
//            Logger.info("choosing non-callkit adaptee for simulator.")
//            adaptee = NonCallKitCallUIAdaptee(callService: callService, notificationPresenter: notificationPresenter)
//        } else if CallUIAdapter.isCallkitDisabledForLocale {
//            Logger.info("choosing non-callkit adaptee due to locale.")
//            adaptee = NonCallKitCallUIAdaptee(callService: callService, notificationPresenter: notificationPresenter)
//        } else if #available(iOS 11, *) {
//            Logger.info("choosing callkit adaptee for iOS11+")
//            let showNames = Environment.shared.preferences.notificationPreviewType() != .noNameNoPreview
//            let useSystemCallLog = Environment.shared.preferences.isSystemCallLogEnabled()
//
//            adaptee = CallKitCallUIAdaptee(callService: callService, contactsManager: contactsManager, notificationPresenter: notificationPresenter, showNamesOnCallScreen: showNames, useSystemCallLog: useSystemCallLog)
//        } else if #available(iOS 10.0, *), Environment.shared.preferences.isCallKitEnabled() {
//            Logger.info("choosing callkit adaptee for iOS10")
//            let hideNames = Environment.shared.preferences.isCallKitPrivacyEnabled() || Environment.shared.preferences.notificationPreviewType() == .noNameNoPreview
//            let showNames = !hideNames
//
//            // All CallKit calls use the system call log on iOS10
//            let useSystemCallLog = true
//
//            adaptee = CallKitCallUIAdaptee(callService: callService, contactsManager: contactsManager, notificationPresenter: notificationPresenter, showNamesOnCallScreen: showNames, useSystemCallLog: useSystemCallLog)
//        } else {
//            Logger.info("choosing non-callkit adaptee")
//            adaptee = NonCallKitCallUIAdaptee(callService: callService, notificationPresenter: notificationPresenter)
//        }
//
//        audioService = CallAudioService(handleRinging: adaptee.hasManualRinger)
//
//        super.init()
//
//        // We cannot assert singleton here, because this class gets rebuilt when the user changes relevant call settings
//
//        callService.addObserverAndSyncState(observer: self)
//    }
//
//    @objc
//    public static var isCallkitDisabledForLocale: Bool {
//        let locale = Locale.current
//        guard let regionCode = locale.regionCode else {
//            owsFailDebug("Missing region code.")
//            return false
//        }
//
//        // Apple has stopped approving apps that use CallKit functionality in mainland China.
//        // When the "CN" region is enabled, this check simply switches to the same pre-CallKit
//        // interface that is still used by everyone on iOS 9.
//        //
//        // For further reference: https://forums.developer.apple.com/thread/103083
//        return regionCode == "CN"
//    }
//
//    // MARK: Dependencies
//
//    var audioSession: OWSAudioSession {
//        return Environment.shared.audioSession
//    }
//
//    // MARK: 
//
//    internal func reportIncomingCall(_ call: SignalCall, thread: TSContactThread) {
//        AssertIsOnMainThread()
//
//        // make sure we don't terminate audio session during call
//        _ = audioSession.startAudioActivity(call.audioActivity)
//
//        let callerName = self.contactsManager.displayName(forPhoneIdentifier: call.remotePhoneNumber)
//        adaptee.reportIncomingCall(call, callerName: callerName)
//    }
//
//    internal func reportMissedCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        let callerName = self.contactsManager.displayName(forPhoneIdentifier: call.remotePhoneNumber)
//        adaptee.reportMissedCall(call, callerName: callerName)
//    }
//
//    internal func startOutgoingCall(handle: String) -> SignalCall {
//        AssertIsOnMainThread()
//
//        let call = adaptee.startOutgoingCall(handle: handle)
//        return call
//    }
//
//    @objc public func answerCall(localId: UUID) {
//        AssertIsOnMainThread()
//
//        adaptee.answerCall(localId: localId)
//    }
//
//    internal func answerCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.answerCall(call)
//    }
//
//    @objc public func declineCall(localId: UUID) {
//        AssertIsOnMainThread()
//
//        adaptee.declineCall(localId: localId)
//    }
//
//    internal func declineCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.declineCall(call)
//    }
//
//    internal func didTerminateCall(_ call: SignalCall?) {
//        AssertIsOnMainThread()
//
//        if let call = call {
//            self.audioSession.endAudioActivity(call.audioActivity)
//        }
//    }
//
//    @objc public func startAndShowOutgoingCall(recipientId: String, hasLocalVideo: Bool) {
//        AssertIsOnMainThread()
//
//        adaptee.startAndShowOutgoingCall(recipientId: recipientId, hasLocalVideo: hasLocalVideo)
//    }
//
//    internal func recipientAcceptedCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.recipientAcceptedCall(call)
//    }
//
//    internal func remoteDidHangupCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.remoteDidHangupCall(call)
//    }
//
//    internal func remoteBusy(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.remoteBusy(call)
//    }
//
//    internal func localHangupCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.localHangupCall(call)
//    }
//
//    internal func failCall(_ call: SignalCall, error: CallError) {
//        AssertIsOnMainThread()
//
//        adaptee.failCall(call, error: error)
//    }
//
//    internal func showCall(_ call: SignalCall) {
//        AssertIsOnMainThread()
//
//        adaptee.showCall(call)
//    }
//
//    internal func setIsMuted(call: SignalCall, isMuted: Bool) {
//        AssertIsOnMainThread()
//
//        // With CallKit, muting is handled by a CXAction, so it must go through the adaptee
//        adaptee.setIsMuted(call: call, isMuted: isMuted)
//    }
//
//    internal func setHasLocalVideo(call: SignalCall, hasLocalVideo: Bool) {
//        AssertIsOnMainThread()
//
//        adaptee.setHasLocalVideo(call: call, hasLocalVideo: hasLocalVideo)
//    }
//
//    internal func setAudioSource(call: SignalCall, audioSource: AudioSource?) {
//        AssertIsOnMainThread()
//
//        // AudioSource is not handled by CallKit (e.g. there is no CXAction), so we handle it w/o going through the
//        // adaptee, relying on the AudioService CallObserver to put the system in a state consistent with the call's
//        // assigned property.
//        call.audioSource = audioSource
//    }
//
//    internal func setCameraSource(call: SignalCall, isUsingFrontCamera: Bool) {
//        AssertIsOnMainThread()
//
//        callService.setCameraSource(call: call, isUsingFrontCamera: isUsingFrontCamera)
//    }
//
//    // CallKit handles ringing state on it's own. But for non-call kit we trigger ringing start/stop manually.
//    internal var hasManualRinger: Bool {
//        AssertIsOnMainThread()
//
//        return adaptee.hasManualRinger
//    }
//
//    // MARK: - CallServiceObserver
//
//    internal func didUpdateCall(call: SignalCall?) {
//        AssertIsOnMainThread()
//
//        call?.addObserverAndSyncState(observer: audioService)
//    }
//
//    internal func didUpdateVideoTracks(call: SignalCall?,
//                                       localCaptureSession: AVCaptureSession?,
//                                       remoteVideoTrack: RTCVideoTrack?) {
//        AssertIsOnMainThread()
//
//        audioService.didUpdateVideoTracks(call: call)
//    }
//}