using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Linq;
using UnityEngine;
using UnityEngine.Events;

public class Conn
{
    UnityAction<string> closeEvent;//断开连接事件

    //缓冲区最大长度
    public const int BufferSize = 16384;

    //通信基类
    public Socket socket;

    //当前数据长度
    public int bufferCount;

    //当前对象是否使用
    public bool isUse = false;

    //字节码缓冲区
    public byte[] readBuffer;

    //消息长度
    public int msgLength = 0;

    //最后一次心跳时间
    public long lastTickTime;

    public byte[] lenBytes = new byte[sizeof(UInt32)];

    string endPoint;

    //创建时确定缓冲区大小
    public Conn()
    {
        readBuffer = new byte[BufferSize];
    }

    //获取连接该对象的客户终端地址
    public string GetEndIPDress()
    {
        if (!isUse)
            return "该对象未启用，获取地址失败";
        return endPoint;
    }

   

    //关闭连接
    public void Close()
    {
        if (!isUse)
            return;
        //Debug.Log($"{endPoint}断开链接");
        //MessageBox.Show("断开:"+GetEndIPDress());
        socket.Shutdown(SocketShutdown.Both);
        socket.Close();
        isUse = false;
        closeEvent?.Invoke(endPoint);
        endPoint = null;
    }

    //启用时初始化Conn
    public void Init(Socket socket,UnityAction<string> closeAction)
    {
        this.socket = socket;
        isUse = true;
        bufferCount = 0;
        lastTickTime = SysTime.GetTimeStamp();
        endPoint = socket.RemoteEndPoint.ToString().Split(':')[0];//获取目标的IP [1]为端口
        closeEvent = closeAction;
    }

    //缓冲区剩余长度
    public int BuffRemain()
    {
        return BufferSize - bufferCount;
    }

    public void Send(ProtocolBase protocolBase)
    {
        byte[] bytes = protocolBase.Encode();
        byte[] length = BitConverter.GetBytes(bytes.Length);
        byte[] sendBuff = length.Concat(bytes).ToArray();
        socket.Send(sendBuff);
    }

  
}