using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Vinno.FIS.TRTCClient.Common.Enum;
using Vinno.IUS.Common.Log;
using Vinno.vCloud.Common.FIS.Helper;
using Vinno.vCloud.FIS.CrossPlatform.Common;
using Vinno.vCloud.FIS.CrossPlatform.Common.Enum;
using Vinno.vCloud.FIS.CrossPlatform.Common.LiveVideo;
using Vinno.vCloud.FIS.CrossPlatform.Common.LiveVideo.Interface;
using WingInterfaceLibrary.Enum;
using WingInterfaceLibrary.Interface;
using WingInterfaceLibrary.LiveConsultation;
using WingInterfaceLibrary.Request.Device;

namespace Vinno.vCloud.Common.FIS.LiveVideos
{
    public class LiveVideoPusherV2 : IDisposable
    {
        private readonly object _locker = new object();
        private readonly object _currentDeviceInfolocker = new object();
        private readonly ConcurrentDictionary<EnumPusherType, Func<ILiveVideoPusherV2>> _pusherCreations;
        private readonly List<CPVideoDeviceOutputInfo> _currentVideoDeviceInfoList;
        private readonly string _token;
        private readonly ILiveConsultationService _liveConsultationService;
        private readonly IDeviceService _deviceService;
        private readonly IEducationService _educationService;
        private readonly string _deviceModel;
        private readonly string _deviceType;
        private readonly string _softwareVersion;

        private ManualResetEvent _manualResetEvent = new ManualResetEvent(false);
        private IExtendedData _currentExtendData;
        private EnumPusherType _currentPushType;
        private ILiveVideoPusherV2 _pusher;
        private bool _hasReportedStatus;
        private int _rtcRoomNo;
        private PushHeartRateKeeperV2 _pushHeartRateKeeper;
        private bool _isPaused;

        /// <summary>
        /// 是否正在推流
        /// </summary>
        public bool IsPushing { get; private set; }

        public ILiveVideoPusherV2 LiveVideoPusher => _pusher;

        /// <summary>
        /// 推流状态改变时触发，主要给预览用
        /// </summary>
        public event EventHandler<PusherState> PusherStateChanged;

        /// <summary>
        /// The event to notificate the US to show or hide the live video out put window
        /// </summary>
        public event EventHandler<LiveNotificationArgs> LiveNotification;

        public LiveVideoPusherV2(string token, ILiveConsultationService liveConsultationService, IDeviceService deviceService, IEducationService educationService, string deviceModel, string deviceType, string softwareVersion)
        {
            _token = token;
            _liveConsultationService = liveConsultationService;
            _deviceService = deviceService;
            _educationService = educationService;
            _deviceModel = deviceModel;
            _deviceType = deviceType;
            _softwareVersion = softwareVersion;
            _currentVideoDeviceInfoList = new List<CPVideoDeviceOutputInfo>();
            _pusherCreations = new ConcurrentDictionary<EnumPusherType, Func<ILiveVideoPusherV2>>();
        }

        /// <summary>
        /// 注册具体推流类
        /// </summary>
        /// <param name="type">推流类型</param>
        /// <param name="pusher">推流类的创建方法</param>
        public void RegisterPusher(EnumPusherType type, Func<ILiveVideoPusherV2> pusher)
        {
            _pusherCreations.TryAdd(type, pusher);
        }

        public void UpdateCurrentVideoDeviceInfoList(List<CPVideoDeviceOutputInfo> infos)
        {
            lock (_currentDeviceInfolocker)
            {
                _currentVideoDeviceInfoList.Clear();
                foreach (var info in infos)
                {
                    var item = info.Clone() as CPVideoDeviceOutputInfo;
                    _currentVideoDeviceInfoList.Add(item);
                }
            }
        }

        public void SetIsPaused(bool isPaused)
        {
            Logger.WriteLineInfo($"LiveVideoPusherV2 Set IsPaused:{isPaused}");
            _isPaused = isPaused;
            if (isPaused)
            {
                StopPusher(isPaused);
            }
        }

        public void LiveStateChanged(LiveEventArgs e)
        {
            try
            {
                if (e.IsLive && IsPushing)
                {
                    Logger.WriteLineError($"LiveVideoPusherV2 LiveStateChanged Error,it is already pushing.");
                    return;
                }
                if (e.IsLive)
                {
                    _currentPushType = ConvertToPusherType(e);
                    Logger.WriteLineInfo($"LiveVideoPusherV2 Current Push Type:{_currentPushType}");
                    InitPusher(_currentPushType);
                    StartPusher(e.ExtendedData);
                }
                else
                {
                    StopPusher();
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 Receive Live State Error:{ex}");
            }
        }

        public void SetMute(bool isMute)
        {
            lock (_locker)
            {
                _pusher?.SetMute(isMute);
            }
        }

        public void SwitchMic(string micId)
        {
            lock (_locker)
            {
                _pusher?.SwitchMic(micId);
            }
        }

        /// <summary>
        /// 开始推流
        /// </summary>
        /// <param name="pushParams"></param>
        protected virtual void StartPusher(IExtendedData pushParams)
        {
            PusherStateChanged?.Invoke(this, PusherState.Preparing);
            try
            {
                lock (_locker)
                {
                    _hasReportedStatus = false;
                    _manualResetEvent.Reset();
                    _pusher.ChannelStateChanged += OnChannelStateChanged;
                    var success = _pusher.StartPusher(pushParams, _currentVideoDeviceInfoList);
                    if (success)
                    {
                        Task.Run(ReportLiveStateTask);
                        Logger.WriteLineInfo("LiveVideoPusherV2 Start Pusher Success!");
                        _currentExtendData = pushParams;
                        IsPushing = true;
                        LiveVideoStatusChecker.Instance.IsPushing = true;
                        if (pushParams is RtcExtendedData rtcExtendedData)
                        {
                            _rtcRoomNo = rtcExtendedData.RoomId;
                            if (!CommonParameter.Instance.IsSonopost)
                            {
                                var deviceInfo = rtcExtendedData.UserInfos.FirstOrDefault(x => x.Category == EnumLiveChannelCategory.Main);
                                if (deviceInfo != null && deviceInfo.Width > 0 && deviceInfo.Height > 0)
                                {
                                    LiveNotification?.Invoke(this, new LiveNotificationArgs(true, deviceInfo.Width, deviceInfo.Height));
                                }
                            }
                        }
                        else if (pushParams is RtmpExtendedData rtmpExtendedData)
                        {
                            _rtcRoomNo = 0;
                            if (!CommonParameter.Instance.IsSonopost)
                            {
                                var deviceInfo = rtmpExtendedData.UserInfos.FirstOrDefault(x => x.Category == EnumLiveChannelCategory.Main);
                                if (deviceInfo != null && deviceInfo.Width > 0 && deviceInfo.Height > 0)
                                {
                                    LiveNotification?.Invoke(this, new LiveNotificationArgs(true, deviceInfo.Width, deviceInfo.Height));
                                }
                            }
                        }
                    }
                    else
                    {
                        _hasReportedStatus = true;
                        UpdateChannelState(DeviceLiveStateEnum.Error, "Terminal Start Pushing Failed");
                        Logger.WriteLineError("LiveVideoPusherV2 Start Pusher Fail!");
                    }
                }
            }
            catch (Exception e)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 Start Pusher Error:{e}");
            }
            PusherStateChanged?.Invoke(this, PusherState.Prepared);
        }

        private void ReportLiveStateTask()
        {
            try
            {
                _manualResetEvent.WaitOne(30000);//30秒钟内没有上报，就认为是推流失败
                if (!_hasReportedStatus)
                {
                    UpdateChannelState(DeviceLiveStateEnum.Error, "Start Pushing Error");
                    _hasReportedStatus = true;
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"ReportLiveStateTask Error:{ex}");
            }
        }

        /// <summary>
        /// 结束推流
        /// </summary>
        public void StopPusher(bool isPaused = false, bool needInform = false)
        {
            PusherStateChanged?.Invoke(this, PusherState.Preparing);
            try
            {
                lock (_locker)
                {
                    if (_pusher == null)
                        return;
                    _hasReportedStatus = true;
                    _manualResetEvent.Set();
                    _pusher.ChannelStateChanged -= OnChannelStateChanged;
                    var success = _pusher.StopPusher();
                    if (success)
                    {
                        Logger.WriteLineInfo("LiveVideoPusherV2 Stop Pusher Success!");
                        StopHeartRateKeeper();
                        _pusher.Dispose();
                        _pusher = null;
                        IsPushing = false;
                        LiveVideoStatusChecker.Instance.IsPushing = false;
                    }
                    else
                    {
                        Logger.WriteLineError("LiveVideoPusherV2 Stop Pusher Fail!");
                    }
                    UpdateChannelState(DeviceLiveStateEnum.Closed, "Terminal Close Pushing");
                    if (!CommonParameter.Instance.IsSonopost)
                    {
                        LiveNotification?.Invoke(this, new LiveNotificationArgs(false, 0, 0));
                    }
                    if (needInform)
                    {
                        Task.Run(() =>
                        {
                            LiveVideoStatusChecker.Instance.CurrentMachineConsultationStopPushingEvent?.Invoke(this, EventArgs.Empty);
                        });
                    }
                }
            }
            catch (Exception e)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 Stop Pusher Error:{e}");
            }
            if (!isPaused)
            {
                PusherStateChanged?.Invoke(this, PusherState.Prepared);
            }
        }

        /// <summary>
        /// 重新推流
        /// </summary>
        public void ReStartPusher()
        {
            if (!IsPushing)
            {
                return;
            }
            Logger.WriteLineInfo("LiveVideoPusherV2 Restart Pusher");
            StopPusher();
            InitPusher(_currentPushType);
            StartPusher(_currentExtendData);
        }

        private void OnChannelStateChanged(object sender, ChannelStateEventArgsV2 e)
        {
            try
            {
                Logger.WriteLineInfo($"LiveVideoPusherV2 Update Channel State:{e.Category}_{e.State}");
                if (!_hasReportedStatus)
                {
                    UpdateChannelState((DeviceLiveStateEnum)e.State, "Terminal Start Pushing");
                    _hasReportedStatus = true;
                    _manualResetEvent.Set();
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 Update Channel State Error:{ex}");
            }
        }

        public void UpdateChannelState(DeviceLiveStateEnum state, string message)
        {
            try
            {
                if (CommonParameter.Instance.IsFeatureReleased)
                {
                    Logger.WriteLineError($"UpdateChannelState Skipped,because the feature released");
                    return;
                }
                var reportLiveStateRequest = new ReportLiveStateRequest
                {
                    Token = _token,
                    RoomNo = _rtcRoomNo,
                    LiveState = state,
                    Message = message
                };
                bool result = JsonRpcHelper.ReportLiveState(_deviceService, reportLiveStateRequest);
                if (result)
                {
                    Logger.WriteLineInfo($"JsonRPCHelper ReportLiveState Sucess: State:{state},Message:{message}");
                }
                else
                {
                    Logger.WriteLineError($"JsonRPCHelper ReportLiveState Fail: State:{state},Message:{message}");
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 UpdateChannelState Error:{ex}");
            }
        }

        public void StartHeartRateKeeper(string heartRateCode, int interval, EnumHeartRateType heartRateType)
        {
            lock (_locker)
            {
                if (!IsPushing)
                {
                    Logger.WriteLineError($"LiveVideoPusherV2 Start PushHeartRateKeeper Fail,Because it isn't Pushing");
                    return;
                }
                if (string.IsNullOrWhiteSpace(heartRateCode))
                {
                    Logger.WriteLineError($"LiveVideoPusherV2 Start PushHeartRateKeeper Fail,Because heartRateCode is null");
                    return;
                }
                if (_pushHeartRateKeeper != null)
                {
                    Logger.WriteLineError($"LiveVideoPusherV2 Start PushHeartRateKeeper Fail,Because it is busy");
                    return;
                }
                else
                {
                    if (_currentExtendData != null)
                    {
                        _currentExtendData.HeartRateCode = heartRateCode;
                    }
                    switch (heartRateType)
                    {
                        case EnumHeartRateType.LiveConsultation:
                            _pushHeartRateKeeper = new PushHeartRateKeeperV2(_token, heartRateCode, interval, _liveConsultationService);
                            LiveVideoStatusChecker.Instance.IsConsultationLiving = true;
                            LiveVideoStatusChecker.Instance.CurrentConsultationCode = heartRateCode;
                            break;

                        case EnumHeartRateType.Education:
                            _pushHeartRateKeeper = new PushHeartRateKeeperV2(_token, heartRateCode, interval, _educationService);
                            LiveVideoStatusChecker.Instance.IsEducationLiving = true;
                            break;
                    }
                    if (_pushHeartRateKeeper != null)
                    {
                        _pushHeartRateKeeper.Offlined += OnOfflined;
                        _pushHeartRateKeeper.Start();
                    }
                    Logger.WriteLineInfo($"LiveVideoPusherV2 Start PushHeartRateKeeper,HeartRateType:{heartRateType}");
                }
            }
        }

        public void StopHeartRateKeeper()
        {
            lock (_locker)
            {
                if (_pushHeartRateKeeper != null)
                {
                    _pushHeartRateKeeper.Offlined -= OnOfflined;
                    _pushHeartRateKeeper.Stop();
                    _pushHeartRateKeeper = null;
                    Logger.WriteLineInfo("LiveVideoPusherV2 Stop PushHeartRateKeeper");
                }   
            }
            LiveVideoStatusChecker.Instance.IsConsultationLiving = false;
            LiveVideoStatusChecker.Instance.IsEducationLiving = false;
            LiveVideoStatusChecker.Instance.CurrentConsultationCode = null;
        }

        private void OnOfflined(object sender, EventArgs e)
        {
            Logger.WriteLineInfo($"LiveVideoPusherV2 Pusher is offline");
        }

        private void InitPusher(EnumPusherType type)
        {
            lock (_locker)
            {
                if (_pusherCreations.TryGetValue(type, out var creation))
                {
                    if (_pusher != null)
                    {
                        StopPusher();
                    }
                    _pusher = creation.Invoke();
                }
                else
                {
                    throw new ArgumentException($"LiveVideoPusherV2 Not support Mode {type}");
                }
            }
        }

        private EnumPusherType ConvertToPusherType(LiveEventArgs liveEventArgs)
        {
            if (liveEventArgs.Protocol == EnumLiveProtocol.RTC)
            {
                var rtcExtendedData = liveEventArgs.ExtendedData as RtcExtendedData;
                if (liveEventArgs.PushMode == EnumLiveDataMode.MergeLive)
                {
                    if (liveEventArgs.ExtendedData.MergeType == EnumMergeType.Merge1280X720)
                    {
                        return EnumPusherType.USRtcMerge;
                    }
                    else if (liveEventArgs.ExtendedData.MergeType == EnumMergeType.Merge1920X1080)
                    {
                        return EnumPusherType.RtcMerge;
                    }
                }
                else if (liveEventArgs.PushMode == EnumLiveDataMode.OnlyLive)
                {
                    if (rtcExtendedData.UserInfos.Count() <= 1)
                    {
                        return EnumPusherType.RtcSingle;
                    }
                    else
                    {
                        return EnumPusherType.RtcMulti;
                    }
                }
            }
            else if (liveEventArgs.Protocol == EnumLiveProtocol.Rtmp)
            {
                var rtmpExtendedData = liveEventArgs.ExtendedData as RtmpExtendedData;

                if (liveEventArgs.PushMode == EnumLiveDataMode.MergeLive)
                {
                    if (liveEventArgs.ExtendedData.MergeType == EnumMergeType.Merge1280X720)
                    {
                        return EnumPusherType.USRtmpMerge;
                    }
                    else if (liveEventArgs.ExtendedData.MergeType == EnumMergeType.Merge1920X1080)
                    {
                        return EnumPusherType.RtmpMerge;
                    }
                }
                else if (liveEventArgs.PushMode == EnumLiveDataMode.OnlyLive)
                {
                    if (rtmpExtendedData.UserInfos.Count() <= 1)
                    {
                        return EnumPusherType.RtmpSingle;
                    }
                    else
                    {
                        return EnumPusherType.RtmpMulti;
                    }
                }
            }
            throw new ArgumentException("LiveVideoPusherV2 Unknown Pusher type");
        }

        public void Dispose()
        {
            StopPusher();
            _pusherCreations.Clear();
        }

        public void ChangeConsultationCode(string consultationCode)
        {
            _pushHeartRateKeeper?.SetHeartRateCode(consultationCode);
            if (_currentExtendData != null)
            {
                _currentExtendData.HeartRateCode = consultationCode;
            }
            if (LiveVideoStatusChecker.Instance.IsConsultationLiving)
            {
                LiveVideoStatusChecker.Instance.CurrentConsultationCode = consultationCode;
            }
        }

        public bool StartSpeedTest()
        {
            try
            {
                var createLiveRoomInfoRequest = new CreateLiveRoomInfoRequest
                {
                    DeviceModel = _deviceModel,
                    DeviceType = _deviceType,
                    DeviceUniqueCode = CommonParameter.Instance.MachineId,
                    SoftwareVersion = _softwareVersion,
                };
                var result = JsonRpcHelper.CreateLiveRoomInfo(_deviceService, createLiveRoomInfoRequest);
                if (result == null)
                {
                    throw new InvalidDataException($"JsonRPCHelper CreateLiveRoomInfo Result is null");
                }
                else
                {
                    var pusher = CrossPlatformHelper.Instance.LiveVideoPusherCreatorV2.CreateRTCSinglePusherV2();
                    return pusher.StartSpeedTest((uint)result.AppId, result.UserCode, result.UserSign);
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"LiveVideoPusherV2 StartSpeedTest Fail:{ex}");
                return false;
            }
        }
    }
}