/*
更新了EMQ连接方式
*/
using System;
using MQTTnet.Client;
using System.Threading.Tasks;
using Shared;
using Shared.SimpleControl;
using MQTTnet;
using System.Text;
using System.Security.Cryptography;
using System.Collections.Generic;

namespace SmartHome
{
    public static class MqttCommon
    {
        /// <summary>
        /// 是否提示 远程连接的错误信息 
        /// </summary>
        public static bool IfDEBUG = false;

        /// <summary>
        /// 加密通讯KEY
        /// </summary>
        static string mqttEncryptKey = "";
        //static string checkGatewayTopicBase64 = "";

        /// <summary>
        /// 挤下线主题
        /// </summary>
        static readonly string PushNotifySqueeze = "/Push/NotifySqueeze";

        ///// <summary>
        ///// 挤下线主题
        ///// </summary>
        //static readonly string TopicToApp = "/Push/NotifySqueeze";

        /// <summary>
        /// 是否获取过密钥
        /// </summary>
        static bool isGetGatewaySecretKey = false;

        /// <summary>
        /// 随机Key
        /// </summary>
        static string RandomKey = "";

        static string GetRandomKey ()
        {
            if (string.IsNullOrEmpty (RandomKey)) {
                //随机2位字符串
                RandomKey = Utlis.CreateRandomString (2);
            }

            return RandomKey;

        }

        /// <summary>
        /// 远程MqttClient
        /// </summary>
        public static IMqttClient RemoteMqttClient = new MqttFactory ().CreateMqttClient ();


        /// <summary>
        /// 推送标识
        /// </summary>
        static string PushSignStr = System.DateTime.Now.Ticks.ToString ();

        /// <summary>
        /// 断开远程Mqtt的链接
        /// </summary>
        public static async System.Threading.Tasks.Task DisConnectRemoteMqttClient (string s = "")
        {
            try {
                if (remoteIsConnected) {
                    remoteIsConnected = false;
                    isSubscribeSuccess = false;
                    Shared.Utlis.WriteLine ($"Remote主动断开_{s}");
                    //await RemoteMqttClient.DisconnectAsync(new MQTTnet.Client.Disconnecting.MqttClientDisconnectOptions { }, CancellationToken.None);
                    await RemoteMqttClient.DisconnectAsync ();

                    if (CommonPage.IsRemote) {
                        //不是无网络
                        if (UserConfig.Instance.internetStatus != 0) {
                            Utlis.ShowAppLinkStatus (AppLinkStatus.CloudUnlink);
                        }
                    }
                }
            } catch (Exception e) {
                Shared.Utlis.WriteLine ($"Remote断开通讯连接出异常:{e.Message}");
            }
        }

        /// <summary>
        /// 断开远程Mqtt的链接
        /// </summary>
        static async Task DisConnectRemoteMqttClientWhenStart (string s = "")
        {
            try {
                //if (remoteIsConnected) {
                remoteIsConnected = false;
                isSubscribeSuccess = false;
                Shared.Utlis.WriteLine ($"RemoteStart主动断开_{s}");
                await RemoteMqttClient.DisconnectAsync ();

                //}
            } catch (Exception e) {
                Shared.Utlis.WriteLine ($"RemoteStart断开通讯连接出异常:{e.Message}");
            }

        }


        /// <summary>
        /// 断开mqtt连接
        /// </summary>
        /// <param name="s">断开原因</param>
        /// <param name="reset">是否需要去中心服务器 重新获取参数</param>
        /// <returns></returns>
        public static async Task DisConnectRemote (string s = "", bool reset = true)
        {
            if (reset) {
                bNeedStartTip = true;
                bNeedConnectTip = true;
                CommonConfig.Current.IfGetMqttInfoSuccess = false;
                isGetGatewaySecretKey = false;//获取密钥标记为false
            }
            await DisConnectRemoteMqttClient (s);
        }

        //static DateTime dateTime = DateTime.MinValue;
        /// <summary>
        /// 外网的MQTT是否正在连接
        /// </summary>
        public static bool remoteMqttIsConnecting;
        static bool remoteIsConnected;

        static MqttCommon ()
        {
            InitMqtt ();
        }

        public static bool IsInitMqtt = false;

        ///// <summary>
        ///// 测试
        ///// 定时发送 000E
        ///// </summary>
        ///// <returns></returns>
        //static void InitCheckGateway ()
        //{
        //    new System.Threading.Thread (async () => {
        //        while (true) {
        //            try {

        //                if (!CommonPage.IsRemote) {
        //                    if (GatewayCommon != null) {
        //                        Control.ControlBytesSend (Command.ReadRemark, GatewayCommon.SubnetID, GatewayCommon.DeviceID, new byte [] { });
        //                        Console.WriteLine ("发送000E ");
        //                    }
        //                }
        //                System.Threading.Thread.Sleep (55000);
        //            } catch { }

        //        }
        //    }) { IsBackground = true }.Start ();
        //}


        //static Thread MQTTThread;

        //static void InitMqtt ()
        //{

        //    remoteMqttIsConnecting = false;
        //    if (MQTTThread != null)
        //        MQTTThread.Abort ();

        //    MQTTThread = new System.Threading.Thread (async () => {
        //        while (true) {
        //            try {
        //                System.Threading.Thread.Sleep (200);
        //                //if (!MainPage.LoginUser.IsLogin) {
        //                //    continue;
        //                //}
        //                if (!CommonPage.IsRemote) continue;

        //                await StartCloudMqtt ();
        //                await SubscribeTopics ();
        //            } catch { }
        //        }
        //    }) { IsBackground = true };

        //    MQTTThread.Start ();
        //}

        static void InitMqtt ()
        {
            new System.Threading.Thread (async () => {
                while (true) {
                    try {
                        System.Threading.Thread.Sleep (500);
                        //if (!MainPage.LoginUser.IsLogin) {
                        //    continue;
                        //}

                        if (!CommonPage.IsRemote) continue;

                        if (Control.IsEnterBackground) continue;

                        await StartCloudMqtt ();
                        await SubscribeTopics ();
                    } catch { }
                }
            }) { IsBackground = true }.Start ();
        }

        /// <summary>
        /// 初始化状态
        /// </summary>
        public static void InitState ()
        {
            IfNeedReadAllDeviceStatus = true;
            bNeedStartTip = true;
            bNeedConnectTip = true;
            IsGatewayOnline = false;
            StartCloudMqtt ();

        }

        static bool isSubscribeSuccess;
        static async Task SubscribeTopics ()
        {
            if (remoteIsConnected && !isSubscribeSuccess) {
                try {

                    //var topicFilterPush = new TopicFilter { QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.ExactlyOnce,
                    //    Topic = $"/BusGateWayToClient/{CommonConfig.Instance.CurRemoteMACInfo.clientId}/Push/NotifySqueeze" };

                    //2020-05-14 订阅主题质量改为0
                    var topicFilterBusGateWayToClient = new MqttTopicFilter () {
                        Topic = $"/BusGateWayToClient/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/#",
                        QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce
                        //QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.ExactlyOnce
                    };

                    var topicFilterPush2 = new MqttTopicFilter {
                        Topic = $"/BusGateWayToClient/{MainPage.LoginUser.ID}/#",
                        QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce,
                        //QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.ExactlyOnce
                    };

                    //当设备MQTT报文加密密钥发生变更时,云端通过该主题通知其他客户端刷新密钥,其它和该网关交互的客户端自行订阅该主题,该主题包不加密
                    var topicFilterPush3 = new MqttTopicFilter {
                        Topic = $"/user/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/custom/mqtt/secret/change",
                        QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce,
                    };



                    Utlis.WriteLine ("开始订阅！");
                    var result = await RemoteMqttClient.SubscribeAsync (new MqttTopicFilter [] { topicFilterBusGateWayToClient, topicFilterPush2, topicFilterPush3 });
                    if (result.Items [0].ResultCode == MQTTnet.Client.Subscribing.MqttClientSubscribeResultCode.GrantedQoS0) {
                        isSubscribeSuccess = true;
                        Utlis.WriteLine ("订阅成功！");

                        MqttRemoteSend (new byte [] { 0 }, 3);

                        //读取搜索网关，判断网关是否在线
                        CheckGatewaysIfOnline ();

                        ////连接成功后检测是否需要通过远程获取Key
                        //CheckIfNeedGetLocalPasswordFromRemote ();
                    }


                } catch (Exception ex) {
                    Console.WriteLine ("订阅catch:" + ex.Message.ToString ());
                }
            }
        }

        static DateTime mFlagDateTime;

        //static readonly object SendLocker = new object ();
        /// <summary>
        /// 启动远程Mqtt
        /// </summary>
        public static async Task StartCloudMqtt ()
        {

            if (UserConfig.Instance.internetStatus == 0) {
                return;
            }

            if (!MainPage.LoginUser.IsLogin) {
                return;
            }

            //追加：没有远程连接的权限
            if (remoteMqttIsConnecting || remoteIsConnected) {
                return;
            }

            //lock (SendLocker) {
            //    remoteMqttIsConnecting = true;
            //}
            remoteMqttIsConnecting = true;
#if DEBUG
            Shared.Utlis.WriteLine ($"StartCloudMqtt: 开始");
#endif

            await Task.Factory.StartNew (async () => {
                try {
                    //lock (RemoteMqttClient) {
                    //    //表示后面将进行连接
                    //    remoteMqttIsConnecting = true;

                    #region 初始化远程Mqtt

                    RemoteMqttClient = new MqttFactory ().CreateMqttClient ();


                    //(1)当[连接云端的Mqtt成功后]或者[以及后面App通过云端Mqtt转发数据给网关成功后],处理接收到云端数据包响应时在mqttServerClient_ApplicationMessageReceived这个方法处理
                    if (RemoteMqttClient.ApplicationMessageReceivedHandler == null) {
                        RemoteMqttClient.UseApplicationMessageReceivedHandler ((e) => {
                            try {
                                var topic = e.ApplicationMessage.Topic;
                                if (topic == $"/BusGateWayToClient/{MainPage.LoginUser.ID}" + PushNotifySqueeze) {
                                    var mMes = CommonPage.MyEncodingUTF8.GetString (e.ApplicationMessage.Payload);
                                    //新挤下线主题方案 收到挤下线主题
                                    ReceiveNotifySqueezeAsync (mMes);
                                } else if (topic == $"/BusGateWayToClient/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/NotifyBusGateWayInfoChange") {//网关上线，需要更新aeskey
                                    //收到网关上线消息主题
                                    ReceiveNotifyBusGateWayInfoChange ();
                                } else if (topic == $"/user/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/custom/mqtt/secret/change") {//设备密钥更新通知，需要更新aeskey
                                    //设备密钥更新通知
                                    HDLUtils.WriteLine ("设备密钥更新通知");
                                    isGetGatewaySecretKey = false;//获取密钥标记为false
                                    GetGatewaySecretKey ();
                                } else if (topic == $"/BusGateWayToClient/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/NotifyGateWayOffline") {//网关掉线                                                                                                                    //----第二步：读取账号下面的网关列表
                                    ReceiveNotifyGateWayOffline ();
                                } else if (topic == $"/BusGateWayToClient/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/Common/CheckGateway") {
                                    var ss = CommonPage.MyEncodingUTF8.GetString (e.ApplicationMessage.Payload);
                                    ReceiveCheckGateway (ss);
                                } else {

                                    SetGatewayOnlineResetCheck ();

                                    var packet = new Packet ();

                                    if (!string.IsNullOrEmpty (mqttEncryptKey)) {
                                        packet.Bytes = Shared.Securitys.EncryptionService.AesDecryptPayload (e.ApplicationMessage.Payload, mqttEncryptKey);
                                    } else {
                                        packet.Bytes = e.ApplicationMessage.Payload;
                                    }
                                    packet.IsLocal = false;
                                    packet.Manager ();
                                }
                            } catch { }
                        });
                    }

                    //(2)DisconnectedHandler
                    if (RemoteMqttClient.DisconnectedHandler == null) {
                        RemoteMqttClient.UseDisconnectedHandler (async (e) => {
                            Shared.Utlis.WriteLine ($"远程连接断开");
                            isSubscribeSuccess = false;
                            await DisConnectRemoteMqttClient ("UseDisconnectedHandler");

                        });
                    }
                    //(3)ConnectedHandler
                    if (RemoteMqttClient.ConnectedHandler == null) {
                        RemoteMqttClient.UseConnectedHandler (async (e) => {
                            IfNeedReadAllDeviceStatus = true;
                            bNeedStartTip = true;//
                            bNeedConnectTip = true;
                            Shared.Utlis.WriteLine ($"============>Mqtt远程连接成功");
                            SendPushSignOut ();

                            //if (CommonPage.IsRemote) {
                            //    //Utlis.ShowAppLinkStatus (AppLinkStatus.CloudLink);
                            //    MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.LinkSuccess));
                            //}
                        });
                    }
                    #endregion
                    //}

                    //(4)===========开始连接过程==========
                    //4.1 如果没获取过密钥则重新获取一次, 获取一次最新的密钥
                    if (isGetGatewaySecretKey || GetGatewaySecretKey ()) {
                        //之前已经获取参数成功过
                        if (CommonConfig.Current.IfGetMqttInfoSuccess) {
                            //判断是否需要重新获取
                            await CheckMQTTConnectAsync ();
                        } else {
                            //开始获取远程连接参数
                            await StartMQTTGetInfo ();
                        }
                    }

                } catch (Exception ex) {
                    Shared.Utlis.WriteLine ($"error:" + ex.Message);
                    if (IfDEBUG) {
                        MainPage.ShowAlertOnMainThread ("error: " + ex.Message);
                    }
                } finally {
                    //最终要释放连接状态
                    remoteMqttIsConnecting = false;

                    //lock (SendLocker) {
                    //    remoteMqttIsConnecting = false;
                    //}

                    //连接成功才关闭Loading
                    if (remoteIsConnected) {
                        MainPage.LoadingTipHide ();
                        ERRORCount = 0;
                    } else {
                        ERRORCount++;
                        //每5次重新提示一次
                        if (ERRORCount > 5) {
                            ERRORCount = 0;
                            MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.RemoteFailure));
                            MainPage.LoadingTipHide ();

                        }
                    }

#if DEBUG
                    Shared.Utlis.WriteLine ($"StartCloudMqtt: 结束");
#endif
                }

            });
        }

        //static bool 


        /// <summary>
        /// 检查网关是否在线线程
        /// </summary>
        static System.Threading.Thread CheckGatewaysThead;
        /// <summary>
        /// 网关对象
        /// </summary>
        public static Common GatewayCommon;
        /// <summary>
        /// 检查网关是否在线
        /// </summary>
        static void CheckGatewaysIfOnline ()
        {
            if (GatewayCommon == null) return;

            try {
                //提示搜索网关中
                MainPage.LoadingTipShow (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.CheckingGatewayIsOnline));

                if (CheckGatewaysThead != null)
                    CheckGatewaysThead.Abort ();

                CheckGatewaysThead = new System.Threading.Thread (() => {
                    var returnBytes = Control.ControlBytesSendHasReturn (Command.ReadGateway, GatewayCommon.SubnetID, GatewayCommon.DeviceID, new byte [] { (byte)new Random ().Next (255), (byte)new Random ().Next (255) });
                    //隐藏提示
                    MainPage.LoadingTipHide ();
                    if (CommonPage.IsRemote) {
                        if (returnBytes == null) {
                            Application.RunOnMainThread (() => {
                                IsGatewayOnline = false;
                                Utlis.ShowAppLinkStatus (AppLinkStatus.CloudOffline);
                                MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.RemoteFailedGatewayOffline));
                                //发送一次CheckGateway主题
                                MqttRemoteSend (new byte [] { 0 }, 3);
                            });
                        } else {
                            MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.LinkSuccess));

                            IsGatewayOnline = true;
                            Utlis.ShowAppLinkStatus (AppLinkStatus.CloudLink);
                            Console.WriteLine ("ReadGateway success");
                            CheckIfNeedReadAllDeviceStatus ();
                        }
                    }
                }) { IsBackground = true };

                CheckGatewaysThead.Start ();
            } catch {

            }
        }


        /// <summary>
        /// 检测是否需要发送刷新获取所有设备的命令
        /// </summary>
        static void CheckIfNeedReadAllDeviceStatus ()
        {
            if (IfNeedReadAllDeviceStatus) {
                Utlis.WriteLine ("ReadAllDeviceStatus");
                IfNeedReadAllDeviceStatus = false;
                Shared.SimpleControl.Phone.UserMiddle.ReadAllDeviceStatus ();
            }

        }



        //连接错误次数统计
        static int ERRORCount = 0;

        /// <summary>
        /// 是否需要提示
        /// </summary>
        static bool bNeedConnectTip = true;

        /// <summary>
        /// 从开始到连接成功，只提示1次
        /// </summary>
        static bool bNeedStartTip = true;
        /// <summary>
        /// 正在获取连接参数...
        /// </summary>
        static void ShowStartTip ()
        {
            if (bNeedStartTip) {
                bNeedStartTip = false;
                if (CommonPage.IsRemote) {
                    MainPage.LoadingTipShow (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GettingRemoteConnectionInfo));
                }
            }

            //if (CommonPage.IsRemote) {
            //    //MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GettingRemoteConnectionInfo));
            //    MainPage.LoadingTipShow (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GettingRemoteConnectionInfo));
            //}
        }

        /// <summary>
        /// 检测之前获取的Mac与当前住宅MAC是否一致 不一致从新获取
        /// </summary>
        /// <returns></returns>
        static async Task CheckMQTTConnectAsync ()
        {
            try {
                if (CommonConfig.Current.HomeGatewayInfo != null && CommonConfig.Current.HomeGatewayInfo.mac == UserConfig.Instance.GatewayMAC) {
                    await MQTTConnectAsync ();
                } else {
                    //Mac 变化了重新获取参数
                    await StartMQTTGetInfo ();
                }
            } catch {
                CommonConfig.Current.IfGetMqttInfoSuccess = false;
            }

        }

        /// <summary>
        /// 开始获取Mqtt 远程参数
        /// </summary>
        /// <returns></returns>
        static async Task StartMQTTGetInfo ()
        {
            ShowStartTip ();

            if (!CommonPage.IsRemote) {
                return;
            }

            await GetMqttInfoAndMQTTConnectAsync ();

            ////--判断是当前是否分享的住宅
            //if (!UserConfig.Instance.CurrentRegion.IsOthreShare) {
            //    //主账号获取MQTT 远程链接信息，并连接
            //    await GetMqttInfoAndMQTTConnectAsync ();
            //} else {
            //    //如果是分享过来的住宅 走下面流程
            //    //--第一步：获取当前住分享宅网关信息并连接MQTT
            //    await GetSingleHomeGatewayPaggerAndMQTTConnectAsync ();
            //}
        }


        /// <summary>
        /// 连接MQTT
        /// </summary>
        static async Task MQTTConnectAsync ()
        {

            if (!CommonPage.IsRemote) {
                return;
            }

            if (CommonConfig.Current.HomeGatewayInfo != null && CommonConfig.Current.mMqttInfo != null) {
                if (bNeedConnectTip) {
                    bNeedConnectTip = false;
                    MainPage.LoadingTipShow (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GetSuccessfullyStartConnecting));
                }

                try {

                    var url = CommonConfig.Current.mMqttInfo.url;

                    //url = HttpUtil.GetProxyEMQUrl (url);
                    //#if DEBUG
                    //                   url = HttpUtil.GetProxyEMQUrl (url);

                    //#endif
                    var clientId = CommonConfig.Current.mMqttInfo.clientId;
                    var username = CommonConfig.Current.mMqttInfo.userName;
                    var passwordRemote = CommonConfig.Current.mMqttInfo.passWord;
                    //获取参数成功，保存到本地并标记为true
                    CommonConfig.Current.IfGetMqttInfoSuccess = true;
                    CommonConfig.Current.Save ();

                    mqttEncryptKey = CommonConfig.Current.HomeGatewayInfo.aesKey;

                    var options1 = new MQTTnet.Client.Options.MqttClientOptionsBuilder ()
                                        .WithClientId (clientId)
                                        .WithTcpServer (url.Split (':') [1].Substring ("//".Length), int.Parse (url.Split (':') [2]))
                                        .WithCredentials (username, passwordRemote)
                                        .WithCleanSession ()
                                        .WithProtocolVersion (MQTTnet.Formatter.MqttProtocolVersion.V311)
                                        .WithCommunicationTimeout (new TimeSpan (0, 0, 10))
                                        //.WithCommunicationTimeout (new TimeSpan (0, 0, 5))
                                        //.WithCommunicationTimeout (new TimeSpan (0, 1, 0))
                                        .Build ();

                    await DisConnectRemoteMqttClient ("StartRemoteMqtt");

                    var mResult = await RemoteMqttClient.ConnectAsync (options1);

                    if (mResult.ResultCode == MQTTnet.Client.Connecting.MqttClientConnectResultCode.Success) {
                        remoteIsConnected = true;
                        IsDisConnectingWithSendCatch = false;
                        UnsupportedProtocolVersionCount = 0;
                    } else {
                        //重新中心服务器获取参数标记
                        CommonConfig.Current.IfGetMqttInfoSuccess = false;
                    }

                } catch (Exception ex) {

                    if (ex.Message == MqttCommunicationTimedOutException) {
                        Console.WriteLine ("Connect error TimedOut: " + ex.Message);
                    } else {
                        //重新中心服务器获取参数标记
                        CommonConfig.Current.IfGetMqttInfoSuccess = false;
                        Console.WriteLine ("Connect error: " + ex.Message);
                    }

                    //Console.WriteLine ("Connect error: " + ex.Message);
                    if (IfDEBUG) {
                        MainPage.ShowAlertOnMainThread ("Connect error: " + ex.Message);
                    }
                } finally {

                }

            } else {
                CommonConfig.Current.IfGetMqttInfoSuccess = false;
            }

        }

        static int UnsupportedProtocolVersionCount = 0;
        static readonly string MqttCommunicationTimedOutException = "Exception of type 'MQTTnet.Exceptions.MqttCommunicationTimedOutException' was thrown.";
        //
        static readonly string UnsupportedProtocolVersion = "Connecting with MQTT server failed (UnsupportedProtocolVersion).";



        /// <summary>
        /// 收到网关上线消息
        /// </summary>
        static void ReceiveNotifyBusGateWayInfoChange ()
        {
            try {
                SetGatewayOnlineResetCheck ();
                if (CommonPage.IsRemote) {
                    //#if DEBUG
                    MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GatewayLoginOnline));
                    //#endif
                    CheckIfNeedReadAllDeviceStatus ();
                }
            } catch { }
        }

        /// <summary>
        /// 收到网关掉线信息
        /// </summary>
        static void ReceiveNotifyGateWayOffline ()
        {
            Shared.Utlis.WriteLine ("============>Mqtt GateWayOffline");
            IsGatewayOnline = false;
            if (CommonPage.IsRemote) {
                Utlis.ShowAppLinkStatus (AppLinkStatus.CloudOffline);
                MainPage.AddTip (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.GatewayOffline));

            }
        }


        /// <summary>
        /// 收到挤下线推送
        /// </summary>
        static void ReceiveNotifySqueezeAsync (string mMes)
        {

            if (mMes == PushSignStr) return;//是自己的登录推送不处理

            //断开远程连接
            CommonPage.IsRemote = false;
            if (!MainPage.LoginUser.IsLogin) {
                return;
            }

            DisConnectRemoteMqttClient ("挤下线");

            MainPage.LoginUser.LastTime = DateTime.MinValue;
            MainPage.LoginUser.SaveUserInfo ();
            Room.Lists.Clear ();

            Application.RunOnMainThread (() => {
                Utlis.ShowAppLinkStatus (AppLinkStatus.WiFi);
                new Shared.SimpleControl.Phone.AccountLogin (MainPage.LoginUser.AccountString, "").Show ();
                SharedMethod.SharedMethod.CurPageLayout = null;
                //CommonPage.IsRemote = false;

                MainPage.LoadingTipHide ();
                MainPage.Loading.Hide ();

                new Alert (Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.Tip), Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.LoggedOnOtherDevices),
                    Language.StringByID (Shared.SimpleControl.R.MyInternationalizationString.Close)).Show ();
            });

            //2020-08-11 删除推送数据
            //HDLRequest.Current.PushserivceSignOut ();

            //#if HDL
            //            if (!String.IsNullOrEmpty (MainPage.LoginUser.AllVisionRegisterDevUserNameGuid)) {
            //                com.freeview.global.Video.Logout ();
            //            }///BusGateWayToClient/320c1fea-1866-4708-8277-e2321a4dd236/NotifyGateWayInfoChange
            //#endif


        }

        /// <summary>
        /// 收到CheckGateway主题
        /// </summary>
        static void ReceiveCheckGateway (string mMes)
        {
            if (!CommonPage.IsRemote) return;

            Utlis.WriteLine ("ReceiveCheckGateway！");
            SetGatewayOnlineResetCheck ();
        }

        /// <summary>
        /// 推送挤下线主题
        /// </summary>
        static void SendPushSignOut ()
        {
#if DEBUG
            return;
#endif

            byte [] message = CommonPage.MyEncodingUTF8.GetBytes (PushSignStr);
            MqttRemoteSend (message, 4);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="message">附加数据包</param>
        /// <param name="optionType">操作类型：0=网关控制；1=订阅网关数据;2=订阅网关上线数据</param>
        /// <returns></returns>
        public static async Task MqttRemoteSend (byte [] message, int optionType = 0)
        {
            //return;

            try {
                string topicName;
                switch (optionType) {
                case 0:
                    topicName = $"/ClientToBusGateWay/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/Common/ON";
                    if (!string.IsNullOrEmpty (mqttEncryptKey)) {
                        //Utlis.WriteLine ("mqttEncryptKey：" + mqttEncryptKey);
                        message = Shared.Securitys.EncryptionService.AesEncryptPayload (message, mqttEncryptKey);
                    }
                    await RemoteMqttClient.PublishAsync (new MqttApplicationMessage { Topic = topicName, Payload = message, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                    break;
                case 3:
                    topicName = $"/ClientToBusGateWay/{CommonConfig.Current.HomeGatewayInfo.gatewayId}/Common/CheckGateway";
                    Shared.Utlis.WriteLine ("CheckGateway");
                    await RemoteMqttClient.PublishAsync (new MqttApplicationMessage { Topic = topicName, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                    break;
                case 4://发布新方案的挤下线主题
                    topicName = $"/BusGateWayToClient/{MainPage.LoginUser.ID}" + PushNotifySqueeze;
                    //message = CommonPage.MyEncodingUTF8.GetBytes (PushSignStr);
                    await RemoteMqttClient.PublishAsync (new MqttApplicationMessage { Topic = topicName, Payload = message, Retain = false, QualityOfServiceLevel = MQTTnet.Protocol.MqttQualityOfServiceLevel.AtMostOnce });
                    break;
                }
            } catch (Exception e) {
                //Utlis.WriteLine ($"============>Mqtt MqttRemoteSend catch");
                if (!IsDisConnectingWithSendCatch) {
                    IsDisConnectingWithSendCatch = true;
                    await DisConnectRemoteMqttClient ("SendCatch");
                }
            }
        }
        /// <summary>
        /// SendCatch 后执行一次断开操作
        /// </summary>
        static bool IsDisConnectingWithSendCatch = false;


        /// <summary>
        /// 是否需要读取一次所有设备状态
        /// </summary>
        static bool IfNeedReadAllDeviceStatus = true;
        public static bool IsGatewayOnline = true;
        //static int CheckGatewayCount = 0;
        //static DateTime mCheckGatewayTime;


        /// <summary>
        /// 设置网关在线标志，并重置CheckGateway参数
        /// </summary>
        static void SetGatewayOnlineResetCheck ()
        {

            //mCheckGatewayTime = DateTime.Now;
            //CheckGatewayCount = 0;
            if (CommonPage.IsRemote) {
                if (!IsGatewayOnline) {
                    IsGatewayOnline = true;
                    Utlis.ShowAppLinkStatus (AppLinkStatus.CloudLink);
                }
            }
        }


        /// <summary>
        /// 主账号获取MQTT 远程链接信息，并连接
        /// </summary>
        /// <returns></returns>
        static async Task GetMqttInfoAndMQTTConnectAsync ()
        {
            var mqttInfoRequestResult_Obj = HttpServerRequest.Current.GetMqttRemoteInfo (GetRandomKey ());
            if (mqttInfoRequestResult_Obj != null) {
                CommonConfig.Current.mMqttInfo = mqttInfoRequestResult_Obj;
                if (UserConfig.Instance.CheckHomeGatewaysNotEmpty ()) {
                    //----第二步找出是否存在匹配当前住宅的mac，存在再进行远程。
                    CommonConfig.Current.HomeGatewayInfo = UserConfig.Instance.HomeGateway;
                    if (CommonConfig.Current.HomeGatewayInfo != null) {
                        //----第三步 开始连接
                        await MQTTConnectAsync ();
                    }
                } else {
                    Utlis.WriteLine ("============>还没绑定网关");
                }

            } else {
                Utlis.WriteLine ("============>MqttInfo null");
            }
        }



        /// <summary>
        /// 设备密钥更新通知，重新拿密钥
        /// </summary>
        /// <returns></returns>
        static bool GetGatewaySecretKey ()
        {
            bool isSuccess = false;
            try {
                if (string.IsNullOrEmpty (UserConfig.Instance.CurrentRegion.Id)) return false;
                var nowhomeId = UserConfig.Instance.CurrentRegion.Id;
                var requestJson = HttpUtil.GetSignRequestJson (new HomeIdObj () { homeId = nowhomeId });
                var revertObj = HttpUtil.RequestHttpsPostFroHome (NewAPI.API_POST_GetGatewayList, requestJson);
                if (revertObj.Code == StateCode.SUCCESS) {
                    var mHomeGatewayRes = Newtonsoft.Json.JsonConvert.DeserializeObject<List<HomeGatewayInfo>> (revertObj.Data.ToString ());
                    if (nowhomeId == UserConfig.Instance.CurrentRegion.Id) {
                        if (mHomeGatewayRes != null) {
                            if (mHomeGatewayRes.Count > 0) {
                                //只取第一个住宅
                                var info = mHomeGatewayRes [0];
                                UserConfig.Instance.HomeGateway = info;
                                UserConfig.Instance.SaveUserConfig ();
                                CommonConfig.Current.HomeGatewayInfo = info;
                                //更新网关信息和加密Key
                                mqttEncryptKey = info.aesKey;
                                CommonConfig.Current.Save ();
                                isSuccess = true;
                                isGetGatewaySecretKey = true;//获取密钥标记为true

                            } else {
                                //打印错误
                                HDLUtils.WriteLine ("gateway is not bound");
                            }
                        }
                    }
                } else {
                    //打印错误
                    HDLUtils.WriteLine ("Failed to get gateway info");

                }
                return isSuccess;
            } catch {
                //return "";
                return isSuccess;
            }
        }


    }
}


public class MqttInfo
{
    /// <summary>
    /// 
    /// </summary>
    public string url;
    /// <summary>
    /// 
    /// </summary>
    public string clientId;
    /// <summary>
    /// 
    /// </summary>
    public string userName;
    /// <summary>
    /// 
    /// </summary>
    public string passWord;
}

namespace Shared.Securitys
{
    public partial class EncryptionService
    {

#region 加密
        /// <summary>
        /// 加密主题为Base64
        /// </summary>
        /// <param name="pToEncrypt"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesEncryptTopic (string pToEncrypt, string key)
        {
            if (string.IsNullOrEmpty (pToEncrypt)) return null;
            if (string.IsNullOrEmpty (key)) return pToEncrypt;
            //需要加密内容的明文流
            Byte [] toEncryptArray = Encoding.UTF8.GetBytes (pToEncrypt);

            //配置AES加密Key(密钥、向量、模式、填充)
            RijndaelManaged rm = new RijndaelManaged {
                Key = Encoding.UTF8.GetBytes (key),
                IV = Encoding.UTF8.GetBytes (key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES加密器对象
            ICryptoTransform cTransform = rm.CreateEncryptor ();

            //使用AES将明文流转成密文字节数组
            Byte [] resultArray = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

            //将AES生成的密文字节数组转成Base64字符串
            return Convert.ToBase64String (resultArray, 0, resultArray.Length);
        }


        /// <summary>
        /// 加密负载为二进制流
        /// </summary>
        /// <param name="toEncryptArray"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static byte [] AesEncryptPayload (byte [] toEncryptArray, string key)
        {
            if (string.IsNullOrEmpty (key)) return toEncryptArray;
            //配置AES加密Key(密钥、向量、模式、填充)
            var rm = new RijndaelManaged {
                Key = Encoding.UTF8.GetBytes (key),
                IV = Encoding.UTF8.GetBytes (key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES加密器对象
            var cTransform = rm.CreateEncryptor ();
            //使用AES将明文流转成密文字节数组
            return cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);
        }
#endregion


#region 解密
        /// <summary>
        /// 解密主题数据
        /// </summary>
        /// <param name="pToDecrypt"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string AesDecryptTopic (string pToDecrypt, string key)
        {
            //AES密文Base64转成字符串
            Byte [] toEncryptArray = Convert.FromBase64String (pToDecrypt);

            //配置AES加密Key(密钥、向量、模式、填充)
            RijndaelManaged rm = new RijndaelManaged {
                Key = Encoding.UTF8.GetBytes (key),
                IV = Encoding.UTF8.GetBytes (key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES解密器对象
            ICryptoTransform cTransform = rm.CreateDecryptor ();

            //使用AES将密文流转成明文的字节数组
            Byte [] resultArray = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

            //转成字符串
            return Encoding.UTF8.GetString (resultArray);
        }

        /// <summary>
        /// 采用Aes解密负载数据
        /// </summary>
        /// <param name="toEncryptArray"></param>
        /// <param name="key"></param>
        /// <returns></returns>
        public static byte [] AesDecryptPayload (byte [] toEncryptArray, string key)
        {
            //配置AES加密Key(密钥、向量、模式、填充)
            var rm = new RijndaelManaged {
                Key = Encoding.UTF8.GetBytes (key),
                IV = Encoding.UTF8.GetBytes (key),
                Mode = CipherMode.CBC,
                Padding = PaddingMode.PKCS7
            };

            //创建AES解密器对象
            var cTransform = rm.CreateDecryptor ();

            //使用AES将密文流转成明文的字节数组
            return cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);
        }
#endregion



    }
}