using SKMC.Api.Common.Logger;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace SKMC.Api.Common.Tcp
{
    /// <summary>
    /// TCP Socket客户端
    /// </summary>
    public class TCPClient
    {

        static readonly ILogger log = LogFactory.Get();

        public int BufferSize { get; set; } = 1024 * 8;

        public string Address { get; set; } = "127.0.0.1";

        public int Port { get; set; }

        public int Timeout { get; set; } = 10000;

        public bool KeepAlived { get; set; }

        public bool Logged { get; set; } = true;

        private Socket clientSocket;

        public TCPClient(string address, int port)
        {
            Address = address;
            Port = port;
        }

        public void Connect()
        {
            clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            clientSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveTimeout, Timeout);
            clientSocket.Connect(new IPEndPoint(IPAddress.Parse(Address), Port));
            log.Debug($"已连接至 {Address}:{Port}");
        }

        public bool IsConnected(int millSeconds)
        {
            if (clientSocket == null) return false;
            //bool pollResult = clientSocket.Poll(1000 * millSeconds, SelectMode.SelectRead);
            //return pollResult && clientSocket.Available == 0;
            return true;
        }


        public void Close()
        {
            try
            {
                clientSocket.Shutdown(SocketShutdown.Both);
                clientSocket.Close();
            }
            catch (Exception e)
            {
                log.Error("Socket连接关闭异常", e);
            }
        }


        public void Clear()
        {
            if (clientSocket.Available > 0)
            {
                clientSocket.Receive(new byte[clientSocket.Available]);
            }
        }


        public void Send(string msg, bool logged = true)
        {
            clientSocket.Send(Encoding.ASCII.GetBytes(msg));
            if (Logged && logged) log.Debug($"已发送消息:\n{msg}");
        }


        public string Recevie(bool logged = true)
        {
            byte[] buffer = new byte[BufferSize];
            int length = clientSocket.Receive(buffer);
            string msg = Encoding.ASCII.GetString(buffer, 0, length);
            if (Logged && logged) log.Debug($"接收到消息:\n{msg}");
            return msg;
        }

        public override string ToString() => $"address: {Address}, port: {Port}, keepAlive: {KeepAlived}, timeout: {Timeout}";
    }
}