using System.Collections.Concurrent;
using System.Text;
using TouchSocket.Core;
using TouchSocket.Sockets;


namespace WCS.BLL
{
    /// <summary>
    /// 对TouchSocket的封装 主要完成TCP的连接 状态更新 发送接收通信
    /// </summary>
    public class TCPClient
    {
        public string RemoteIPHost { get; set; } = "127.0.0.1:20002";

        public string BindIPHost { get; set; } = "127.0.0.1:20003";

        public bool IsOnline { get; set; } = false;

        //can模块协议前缀
        public readonly byte[] Prefix = new byte[] { 0x08, 0x00, 0x00 };
        //can模块协议前缀长度
        public readonly int PreFixLength = 3;
        //协议数据部分长度
        public readonly int DataLength = 10;

        public ConcurrentDictionary<int, MessageDto> MessageList { get; set; } = new ConcurrentDictionary<int, MessageDto>();

        public TcpClient tcpClient { get; set; }

        public object receivdLockObject = new object();
        public object sendLockObject = new object();

        public bool Connect()
        {
            try
            {
                tcpClient.Connect();//调用连接，当连接不成功时，会抛出异常。
                return true;
            }
            catch (Exception e)
            {
                //连接失败
                return false;
            }
        }

        /// <summary>
        /// 初始化配置连接
        /// </summary>
        /// <param name="remoteIPHost"></param>
        public TCPClient(string remoteIPHost, string bindIPHost)
        {
            try
            {
                RemoteIPHost = remoteIPHost;
                BindIPHost = bindIPHost;

                tcpClient = new TcpClient();
                //载入配置
                tcpClient.Setup(new TouchSocketConfig()
                    .SetRemoteIPHost(RemoteIPHost)
                    .SetBindIPHost(BindIPHost)
                    .ConfigurePlugins(a =>
                    {
                        //配置断线重连
                        a.UseReconnection(-1, true, 1000);
                    })
                    .ConfigureContainer(a =>
                    {
                        //添加控制台日志注入
                        a.AddConsoleLogger();
                    }));

                //添加接收事件 匹配已发送的指令
                tcpClient.Received += (client, e) =>
                {
                    var data = e.ByteBlock.Buffer.Take((int)e.ByteBlock.Length).ToArray();
                    e.ByteBlock.Clear();
                    var len = data.Length;
                    for (int index = 0; index < data.Length - PreFixLength; index++)
                    {
                        //协议拆包 通过前缀校验是否为完整数据包
                        var prefixInData = data.Skip(index).Take(PreFixLength);
                        var isEqual = prefixInData.SequenceEqual(Prefix);
                        if (isEqual)
                        {
                            var dataTemp = data.Skip(index).Take(PreFixLength + DataLength).ToArray();
                            if (dataTemp.Length < PreFixLength + DataLength)//拆包后不满足一条指令的长度
                            {
                                continue;
                            }
                            //获取返回指令的板子ID
                            var boardId = (data[PreFixLength + 0] << 8) + data[PreFixLength + 1];
                            //查询当前板子是否有待验证的指令
                            var message = new MessageDto();
                            MessageList.TryGetValue(boardId, out message);
                            //功能位校验 功能位相同视为已响应指令 删除对应的指令
                            if (message?.Message[PreFixLength + 2] == dataTemp[PreFixLength + 2])
                            {
                                MessageList.TryRemove(boardId, out message);
                            }
                            index += (PreFixLength + DataLength - 1);//每次循环index会+1 所以这里-1
                        }
                    }
                    return null;
                };

                tcpClient.Connected += (client, e) =>
                {
                    this.IsOnline = true;
                    return EasyTask.CompletedTask;
                };

                tcpClient.Disconnected += (client, e) =>
                {
                    this.IsOnline = false;
                    return EasyTask.CompletedTask;
                };

                //配置数据重发机制
                Task.Run(async () =>
                {
                    while (true)
                    {
                        try
                        {
                            //TO DO如果指令未回应n次 则取消重发
                            Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
                            await Task.Delay(3000);
                            if (MessageList.Count > 0)
                            {
                                Console.WriteLine(Thread.CurrentThread.ManagedThreadId);
                                foreach (var item in MessageList)
                                {
                                    if (item.Value.LastSendTime < DateTime.Now.AddSeconds(3))
                                    {
                                        tcpClient.Send(item.Value.Message);
                                        item.Value.SendTimes++;
                                        item.Value.LastSendTime = DateTime.Now;
                                        await Task.Delay(10);
                                    }
                                }
                            }
                        }
                        catch
                        {

                        }
                    }

                });
            }
            catch (Exception ex)
            {
            }
        }

        public void Send(byte[] message)
        {
            var boardId = (message[3] << 8) + message[4];
            //记录发送指令 用于通信校验 同Id只校验最后一个指令
            ////MessageList.AddOrUpdate(boardId, new MessageDto()
            ////{
            ////    ID = boardId,
            ////    Message = message,
            ////}, (key, oldValue) => oldValue = new MessageDto()
            ////{
            ////    ID = boardId,
            ////    Message = message,
            ////});
            lock (sendLockObject)
            {
                tcpClient.Send(message);
                //发送自带10ms间隔
                Thread.Sleep(10);
            }
        }

        //生成协议明细
        public byte[] GenerateMessage(int boardId, byte[] data)
        {
            var message = new byte[Prefix.Length + 2 + data.Length];
            var boardIdData = BitConverter.GetBytes(unchecked((short)boardId));
            // 检查是否需要交换字节  
            if (BitConverter.IsLittleEndian)
            {
                // 如果是小端序系统，则交换字节  
                byte temp = boardIdData[0];
                boardIdData[0] = boardIdData[1];
                boardIdData[1] = temp;
            }

            Buffer.BlockCopy(Prefix, 0, message, 0, Prefix.Length);
            Buffer.BlockCopy(boardIdData, 0, message, Prefix.Length, boardIdData.Length);
            Buffer.BlockCopy(data, 0, message, Prefix.Length + boardIdData.Length, data.Length);
            return message;
        }

    }

    //发送指令的记录
    public class MessageDto
    {
        public int ID { get; set; }

        /// <summary>
        /// 最后一次发送时间
        /// </summary>
        public DateTime LastSendTime { get; set; } = DateTime.Now;

        /// <summary>
        /// 发送内容
        /// </summary>
        public byte[] Message { get; set; }

        /// <summary>
        /// 发送次数
        /// </summary>
        public int SendTimes { get; set; } = 0;//第几次发送
    }

}