using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;

namespace DllScan
{
    class ScanSocket
    {
        private Socket CurrSocket = null;
        //private Machine CurrMac = null;
        //public Hsms(Machine mac)
        //{

        //}

        //与设备建立连接
        //public bool InitSocket(Machine mac,ref string errorinfo)
        //{
        //    try
        //    {
        //        CurrMac = mac;
        //        if (!ShutDownSocket(ref errorinfo))
        //        {
        //            errorinfo = "关闭socket错误：" + errorinfo;
        //            return false;
        //        }
        //        IPAddress ip = IPAddress.Parse(CurrMac.IPAddress);//服务端所在IP
        //        IPEndPoint ipEnd = new IPEndPoint(ip, CurrMac.FPort);//服务端所监听的接口
        //        CurrSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//初始化一个Socket对象
        //        CurrSocket.Connect(ipEnd);
        //        ////处理来自机台的包，设置接受超时时间为60秒
        //        //建立握手，产生握手二进制数组
        //        byte[] bytes = HsmsUnity.HexStrTobyte(HsmsUnity.SelectReq);


        //        int result = SendMsg(bytes, ref errorinfo);
        //        if (result <= 0)
        //        {
        //            errorinfo = "发送数据1错误:" + errorinfo;
        //            return false;
        //        }
        //        bytes = ReadData(ref errorinfo);
        //        if (bytes == null)
        //        {
        //            errorinfo = "接受数据1错误：" + errorinfo;
        //            return false;
        //        }
        //        string temphexstr = HsmsUnity.byteToHexStr(bytes, " ");
        //        if (temphexstr != HsmsUnity.SelectRsq)//说明没有接受到正确的响应包，则初始化不成功
        //        {
        //            errorinfo = "建立连接时，没有收到正确的响应包！";
        //            return false;
        //        }
        //        return true;
        //    }
        //    catch (Exception ex)
        //    {
        //        errorinfo = ex.Message.ToString();
        //        return false;
        //    }
        //}
        public bool InitSocket(string ipaddress, int fport, ref string errorinfo)
        {
            try
            {
                if (!ShutDownSocket(ref errorinfo))
                {
                    errorinfo = "关闭socket错误：" + errorinfo;
                    return false;
                }
                IPAddress ip = IPAddress.Parse(ipaddress);//服务端所在IP
                //IPEndPoint ipEnd = new IPEndPoint(ip, fport);//服务端所监听的接口
                IPEndPoint ipEnd = new IPEndPoint(ip, 5999);//服务端所监听的接口
                CurrSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//初始化一个Socket对象
                CurrSocket.Connect(ipEnd);
                uint dummy = 0;
                byte[] inOptionValues = new byte[Marshal.SizeOf(dummy) * 3];
                BitConverter.GetBytes((uint)1).CopyTo(inOptionValues, 0);//启用Keep-Alive
                BitConverter.GetBytes((uint)5000).CopyTo(inOptionValues, Marshal.SizeOf(dummy));//在这个时间间隔内没有数据交互，则发探测包 毫秒
                BitConverter.GetBytes((uint)1000).CopyTo(inOptionValues, Marshal.SizeOf(dummy) * 2);//发探测包时间间隔 毫秒
                CurrSocket.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
                CurrSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
                ////处理来自机台的包，设置接受超时时间为60秒
                //CurrSocket.ReceiveTimeout = 1000 * 60;
                //CurrSocket.SendTimeout = 1000 * 60;
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                return false;
            }
        }
        //关闭连接
        public bool ShutDownSocket(ref string errorinfo)
        {
            try
            {
                if (CurrSocket == null)
                    return true;
                //if (CurrSocket.Connected)
                //{
                    
                //}
                //CurrSocket.Shutdown(SocketShutdown.Both);
                CurrSocket.Close();//关闭Socket
                CurrSocket = null;
                return true;
            }
            catch (Exception ex)
            {
                CurrSocket = null;
                errorinfo = ex.Message.ToString();
                return false;
            }
        }
        //发送数据
        private int SendMsg(byte[] datas, ref string errorinfo)
        {
            try
            {
                int result = CurrSocket.Send(datas);
                return result;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                errorinfo = "Socket发送数据发生异常，错误信息为：" + errorinfo;
                return -1;
            }
        }
        //socket读取数据
        private byte[] ReadData(ref string errorinfo)
        {
            
            try
            {
                //uint dummy = 0;
                //byte[] inOptionValues = new byte[Marshal.SizeOf(dummy) * 3];
                //BitConverter.GetBytes((uint)1).CopyTo(inOptionValues, 0);//启用Keep-Alive
                //BitConverter.GetBytes((uint)5000).CopyTo(inOptionValues, Marshal.SizeOf(dummy));//在这个时间间隔内没有数据交互，则发探测包 毫秒
                //BitConverter.GetBytes((uint)1000).CopyTo(inOptionValues, Marshal.SizeOf(dummy) * 2);//发探测包时间间隔 毫秒
                //CurrSocket.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
                //CurrSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);

                byte[] allbuffs = new byte[100];
                int result = CurrSocket.Receive(allbuffs, 100, SocketFlags.None);
                if (result <= 0)
                {
                    errorinfo = "未能从机台上读取数据，可能机台已经断开了。";
                    return null;
                }
                byte[] tempbuff = new byte[result];
                Array.Copy(allbuffs, 0, tempbuff, 0, result);
                return tempbuff;
            }
            catch (SocketException ex)
            {
                errorinfo = "Socket接受数据发生异常，错误信息为：" + ex.SocketErrorCode.ToString();
                return null;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                errorinfo = "Socket接受数据发生异常，错误信息为：" + errorinfo;
                return null;
            }
        }

        private byte[] GetKeepAliveData()
        {
            uint dummy = 0;
            byte[] inOptionValues = new byte[Marshal.SizeOf(dummy) * 3];
            BitConverter.GetBytes((uint)1).CopyTo(inOptionValues, 0);
            BitConverter.GetBytes((uint)3000).CopyTo(inOptionValues, Marshal.SizeOf(dummy));//keep-alive间隔
            BitConverter.GetBytes((uint)500).CopyTo(inOptionValues, Marshal.SizeOf(dummy) * 2);// 尝试间隔
            return inOptionValues;
        }

        /// <summary>
        /// 接受设备指令
        /// </summary>
        /// <param name="order"></param>
        /// <param name="datas"></param>
        /// <returns></returns>

        public byte[] ReceiveForBytes(ref string errorinfo)
        {
            try
            {
                byte[] receivedatas = ReadData(ref errorinfo);
                return receivedatas;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                return null;
            }

        }
        public ScanBlock ReceiveForBlock(ref string errorinfo)
        {
            try
            {
                byte[] receivedatas = ReadData(ref errorinfo);

                if (receivedatas == null)
                    return null;
                string scanstr= System.Text.Encoding.ASCII.GetString(receivedatas);
                ScanBlock receiveblock = new ScanBlock(scanstr,"",DateTime.Now);
                return receiveblock;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                return null;
            }

        }
        public int SendForBytes(byte[] datas, ref string errorinfo)
        {
            try
            {
                int result = SendMsg(datas, ref errorinfo);
                return result;
            }
            catch (Exception ex)
            {
                errorinfo = ex.Message.ToString();
                return -1;
            }

        }
        public int SetReceiveTimeout(int timeout)
        {
            CurrSocket.ReceiveTimeout = timeout;
            return 1;
        }
        public int SetSendTimeout(int timeout)
        {
            CurrSocket.SendTimeout = timeout;
            return 1;
        }
    }
}