using System.Text;
using Autofac;
using Autofac.Core;
using HybirdFrameworkCore.Autofac;
using HybirdFrameworkCore.Autofac.Attribute;
using log4net;
using MQTTnet;
using MQTTnet.Client;
using MQTTnet.Client.Connecting;
using MQTTnet.Client.Disconnecting;
using MQTTnet.Client.Options;
using MQTTnet.Client.Publishing;
using MQTTnet.Client.Receiving;
using MQTTnet.Formatter;
using MQTTnet.Protocol;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Newtonsoft.Json.Linq;
using Service.Cloud.Handler;
using Service.Cloud.Msg;
using Service.Cloud.Msg.Cloud.Req;
using Service.Cloud.Msg.Host.Req;

namespace Service.Cloud.Client;

[Scope("SingleInstance")]
public class CloudClient : IMqttClientConnectedHandler, IMqttApplicationMessageReceivedHandler,
    IMqttClientDisconnectedHandler
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(CloudClient));

    #region tcp param

    public string ServerIp { get; set; }
    public int ServerPort { get; set; }
    public string ClientId { get; set; }
    public string? Username { get; set; }
    public string? Password { get; set; }
    public int KeepalivePeriod { get; set; } = 30;
    public int Timeout { get; set; } = 60;
    public string Version { get; set; } = "5.0.16";
    public bool IsCleanSession { get; set; } = false;

    #endregion

    #region property

    public bool Connected { get; set; }
    public bool AutoReConnect { get; set; }

    public string StationNo { get; set; }
    public string SubTopic { get; set; }

    public string PubTopic { get; set; }

    public int Encrypt { get; set; }

    public string? AesKey { get; set; }
    
    public bool Authed { get; set; }

    #endregion

    #region Cmd

    public CarCanStart? CarCanStart { get; set; }

    #endregion

    private IMqttClient? MqttClient;

    private List<IBaseHandler> handlers = new List<IBaseHandler>();

    private static ushort _incrementId;

    private static ushort GetIncrementId()
    {
        if (_incrementId < 65535)
        {
            _incrementId += 1;
        }
        else
        {
            _incrementId = 1;
        }

        return _incrementId;
    }

    public void InitHandler()
    {
        var list = new List<Type>();

        foreach (var reg in AppInfo.Container.ComponentRegistry.Registrations)
        foreach (var service in reg.Services)
            if (service is TypedService ts)
                if (MatchHandlers(ts))
                    list.Add(ts.ServiceType);


        foreach (var type in list)
        {
            var resolve = AppInfo.Container.Resolve(type);
            handlers.Add((IBaseHandler)resolve);
        }
    }

    private bool MatchHandlers(TypedService ts)
    {
        var interfaces = ts.ServiceType.GetInterfaces();
        if (interfaces.Length > 0)
            foreach (var type in interfaces)
            {
                if (type.ToString().Contains("Service.Cloud.Handler"))
                {
                    return true;
                }
            }

        return false;
    }


    public void Connect()
    {
        Log.Info($"begin connect cloud {ServerIp}:{ServerPort} with client={ClientId}");
        if (MqttClient == null)
        {
            MqttClient = new MqttFactory().CreateMqttClient();
            MqttClient.ConnectedHandler = this;
            MqttClient.ApplicationMessageReceivedHandler = this;
            MqttClient.DisconnectedHandler = this;
        }

        try
        {
            var task = MqttClient.ConnectAsync(BuildOptions());
            MqttClientConnectResult result = task.Result;
            Log.Info($"connect cloud {result.ResultCode}");
            if (result.ResultCode == MqttClientConnectResultCode.Success)
            {
                Connected = true;
            }
            else
            {
                Connected = false;
                if (AutoReConnect)
                {
                    Thread.Sleep(5000);
                    Connect();
                }
            }
        }
        catch (Exception e)
        {
            Log.Error("connect cloud error", e);
            if (AutoReConnect)
            {
                Thread.Sleep(5000);
                Connect();
            }
        }
    }

    /// <summary>
    /// 连接成功回调
    /// </summary>
    /// <param name="eventArgs"></param>
    /// <returns></returns>
    public async Task HandleConnectedAsync(MqttClientConnectedEventArgs eventArgs)
    {
        await DoSubTopic(SubTopic);
        Publish(new SignIn());
    }

    private async Task DoSubTopic(string topic)
    {
        List<MqttTopicFilter> list = new List<MqttTopicFilter>();
        string[] topics = topic.Split(new char[] { ',' });
        foreach (string str in topics)
        {
            MqttTopicFilter topicFilter = new MqttTopicFilter
            {
                Topic = str,
                QualityOfServiceLevel = MqttQualityOfServiceLevel.AtMostOnce
            };
            list.Add(topicFilter);
        }

        await MqttClient.SubscribeAsync(list.ToArray());

        Log.Info($"subscribe {topic} success ");
    }

    public void Publish<T>(T data) where T : ICmd
    {
        Model<T> model = new Model<T>
        {
            Header = new Header()
            {
                cmd = data.GetCmd(),
                chipherFlag = Encrypt,
                id = GetIncrementId(),
                sid = StationNo,
                timeStamp = DateTime.Now.Millisecond
            },
            body = data
        };

        model.dataSign = SignData(model);

        var appMsg = new MqttApplicationMessage
        {
            Topic = PubTopic,
            Payload = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(model)),
            QualityOfServiceLevel = MqttQualityOfServiceLevel.AtMostOnce,
            Retain = false
        };

        Task<MqttClientPublishResult> task = MqttClient.PublishAsync(appMsg);
        var result = task.Result;
        if (result.ReasonCode == MqttClientPublishReasonCode.Success)
        {
            Log.Info($"send {JsonConvert.SerializeObject(model)} success");
        }
    }

    private string SignData<T>(Model<T> model) where T : ICmd
    {
        IsoDateTimeConverter timeConverter = new IsoDateTimeConverter();
        timeConverter.DateTimeFormat = "yyyy-MM-dd HH:mm:ss";
        string body = JsonConvert.SerializeObject(model.body, timeConverter);
        return body + ":" + model.Header.timeStamp + ":" + model.Header.id;
    }

    /// <summary>
    /// 消息接收回调
    /// </summary>
    /// <param name="eventArgs"></param>
    /// <returns></returns>
    public Task HandleApplicationMessageReceivedAsync(MqttApplicationMessageReceivedEventArgs eventArgs)
    {
        var message = eventArgs.ApplicationMessage;
        if (message.Topic != SubTopic)
        {
            return Task.CompletedTask;
        }

        if (message.Payload == null)
        {
            return Task.CompletedTask;
        }

        string s = Encoding.UTF8.GetString(message.Payload);
        if (string.IsNullOrWhiteSpace(s))
        {
            return Task.CompletedTask;
        }

        Log.Info($"from cloud receive {s} ");
        JObject objResult = JObject.Parse(s);
        string headerStr = objResult["header"].ToString();
        Header? header = JsonConvert.DeserializeObject<Header>(headerStr);
        if (header == null)
        {
            return Task.CompletedTask;
        }

        foreach (IBaseHandler handler in handlers)
        {
            if (handler.CanHandle(header.cmd))
            {
                string bodyStr = objResult["body"].ToString();
                handler.Handle(bodyStr);
                break;
            }
        }
        return Task.CompletedTask;
    }


    /// <summary>
    /// 断开回调
    /// </summary>
    /// <param name="eventArgs"></param>
    /// <returns></returns>
    public Task HandleDisconnectedAsync(MqttClientDisconnectedEventArgs eventArgs)
    {
        Log.Info("cloud disconnect");
        Connected = false;
        if (AutoReConnect)
        {
            return Task.Run(Connect);
        }

        return Task.CompletedTask;
    }

    private IMqttClientOptions BuildOptions()
    {
        MqttClientOptionsBuilder builder =
            new MqttClientOptionsBuilder().WithTcpServer(ServerIp, ServerPort).WithClientId(ClientId);
        if (!string.IsNullOrWhiteSpace(Username))
        {
            builder.WithCredentials(Username, Encoding.UTF8.GetBytes(Password));
        }

        if (IsCleanSession)
        {
            builder.WithCleanSession();
        }

        builder.WithKeepAlivePeriod(TimeSpan.FromSeconds(KeepalivePeriod))
            .WithCommunicationTimeout(TimeSpan.FromSeconds(Timeout));
        switch (Version)
        {
            case "3.1.0":
                builder.WithProtocolVersion(MqttProtocolVersion.V310);
                break;

            case "5.0.16":
                builder.WithProtocolVersion(MqttProtocolVersion.V500);
                break;

            default:
                builder.WithProtocolVersion(MqttProtocolVersion.V311);
                break;
        }

        return builder.Build();
    }
}