using EC.Utils.Helper;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

namespace EC.Utils.SocketHelper
{
	public class SocketClient
	{
		/// <summary>
		/// 返回字符串
		/// </summary>
		public event EventHandler<string> RecData; //定义一个委托类型的事件

		/// <summary>
		/// 返回type[]
		/// </summary>
		public event EventHandler<byte[]> OnRecData; //定义一个委托类型的事件

		/// <summary>
		/// 返回日志
		/// </summary>
		public event EventHandler<string> OnLog; //定义一个委托类型的事件

		private Boolean Listening { get; set; } = false;
		private Socket ClientSocket = null;

		//  private bool Doing = false; //处理数据
		public string host;

		public int port;
		private Dictionary<string, string> PrintList = new Dictionary<string, string>();

		private bool SocketconState { get; set; }

		public SocketClient(string _host, int _port)
		{
			host = _host;
			port = _port;
		}

		public bool Start()
		{
			Stop();
			return ConnectServer();
		}

		private ManualResetEvent allDone = new ManualResetEvent(false);

		#region Socket

		//   byte[] MsgBuffer = new byte[1024];
		/// <summary>
		/// 打开客户端，即连接服务器
		/// </summary>
		private bool ConnectServer()
		{
			try
			{
				Listening = true;

				//创建终结点EndPoint
				IPAddress ip = IPAddress.Parse(host);
				IPEndPoint remotePoint = new IPEndPoint(ip, port);   //把ip和端口转化为IPEndPoint的实例

				ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
				//ClientSocket.ReceiveTimeout
				ClientSocket.Connect(remotePoint);
				//发送信息至服务器
				// ClientSocket.Send(Encoding.Unicode.GetBytes("用户： 进入系统！" + "\r\n"));

				StateObject state = new StateObject();
				state.workSocket = ClientSocket;

				ClientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, SocketFlags.None,
					new AsyncCallback(ReceiveCallback), state);

				SocketconState = true;

				Log("连接到服务器IP：" + host + " Port:" + port);
				return true;
			}
			catch (ArgumentException e)
			{
				LogUnit.Error("argumentNullException:" + e.Message);
				Stop();
				Log("连接到服务器IP：" + host + " Port:" + port + " 失败！");
				return false;
			}
			catch (SocketException e)
			{
				LogUnit.Error("SocketException:" + e.Message);
				Stop();
				Log("连接到服务器IP：" + host + " Port:" + port + " 失败！");
				return false;
			}
			catch (Exception e)
			{
				LogUnit.Error("SocketException:" + e.Message);
				Stop();
				Log("连接到服务器IP：" + host + " Port:" + port + " 失败！");
				return false;
			}
		}

		/// <summary>
		/// 回调时调用
		/// </summary>
		/// <param name="ar"></param>
		private void ReceiveCallback(IAsyncResult ar)
		{
			SocketconState = true;
			try
			{
				StateObject state = (StateObject)ar.AsyncState;
				Socket handler = state.workSocket;
				int read = handler.EndReceive(ar);
				//  LogUnit.Debug("ReceiveCallback read=" + read);
				// LogUnit.Debug("ReceiveCallback state.buffer.Length=" + state.buffer.Length);
				if (Listening && read > 0)
				{
					try
					{
						byte[] newfuf = ByteHelper.SubArr(state.buffer, 0, read);
						OnRecData?.Invoke(this, newfuf);
						RecData?.Invoke(this, Encoding.UTF8.GetString(state.buffer, 0, read));
					}
					catch (Exception ex)
					{
						LogUnit.Error(this.GetType(), ex);
						OnLog?.Invoke(this, ex.Message);
					}
					//#if DEBUG
					//                    string hexstr = ByteHelper.ByteArrayToHexString(newfuf);
					//                    FileUnit.Log("Rec From PLC Hex =" + hexstr);
					//#endif

					//  string readstring = Encoding.UTF8.GetString(state.buffer, 0, read);
					//在此次可以对data进行按需处理
					// LogUnit.Debug("clientip: rec： " + readstring);
					//  byte[] readdata = Protocol.Unpack(state.buffer);
					//string readstr = Encoding.UTF8.GetString(readdata);
					//在此次可以对data进行按需处理
					///  OnRecData(this, readstring);

					ClientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state);
				}
				else
				{
					this.Stop();
				}
			}
			catch (Exception ex)
			{
				LogUnit.Error(ex.ToString());
				this.Stop();
			}
		}

		/// <summary>
		/// 发送数据到服务器
		/// </summary>
		/// <param name="sendStr"></param>
		/// <returns></returns>
		public bool SendToService(string sendStr)
		{
			try
			{
				if (ClientSocket == null || ClientSocket.Connected == false)
				{
					Start();
					if (ClientSocket.Connected == false)
					{
						return false;
					}
				}
				//向服务器发送信息
				if (sendStr.Trim() != "HeartBeat") // 过滤心跳
				{
					LogUnit.Debug("Send:" + sendStr);
				}
				byte[] bs = Encoding.UTF8.GetBytes(sendStr);   //把字符串编码为字节
															   // bs = Protocol.Packet(bs);
															   // string hexstr = ByteHelper.ByteArrayToHexString(bs);//记录日志
				int x = ClientSocket.Send(bs, bs.Length, 0); //发送信息
				SocketconState = true;
				return true;
			}
			catch (Exception ex)
			{
				string error = "SendToService 不能连接到服务器 " + port + " " + ex.Message;
				LogUnit.Error(this.GetType(), error);
				Log(error);
				return false;
			}
		}

		public bool SendToService(byte[] bs)
		{
			try
			{
				if (ClientSocket == null || ClientSocket.Connected == false)
				{
					Start();
					if (ClientSocket.Connected == false)
					{
						return false;
					}
				}
				int x = ClientSocket.Send(bs, bs.Length, 0); //发送信息
				SocketconState = true;
				return true;
			}
			catch (Exception ex)
			{
				string error = "SendToService 不能连接到服务器 " + port + " " + ex.Message;
				LogUnit.Error(this.GetType(), error);
				Log(error);
				return false;
			}
		}

		#endregion Socket

		public void Stop()
		{
			Listening = false;
			SocketconState = false;
			if (ClientSocket != null)
			{
				ClientSocket.Close();
				ClientSocket = null;
			}
		}

		/// <summary>
		/// Socket 连接状态
		/// </summary>
		/// <returns></returns>
		public bool ConnetionState()
		{
			if (SocketconState)
			{
				if (ClientSocket == null || ClientSocket.Connected == false)
				{
					SocketconState = false;
				}
				return SocketconState;
			}
			else
			{
				return ConnectServer();
			}
		}

		public void Log(string msg)
		{
			OnLog?.Invoke(this, msg);
		}
	}
}