using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;

namespace FileWatcher
{

    public class TcpServer
    {
        //端口号
        private int SocketServerPort = 8800;
        //处理连接请求的线程
        private Thread acceptConnectReqThd;

        List<Socket> socket = new List<Socket>();

        Socket socketWatch;

        bool Watching;

        RichTextBox OperatResult;
        DataGridView dgv;

        public bool Start()
        {
            try
            {
                //创建一个socket对象
                socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //获取IP
                IPAddress ip = IPAddress.Any;
                //创建端口号
                IPEndPoint port = new IPEndPoint(ip, SocketServerPort);
                //监听
                socketWatch.Bind(port);
                Console.WriteLine("监听成功");
                socketWatch.Listen(200);  //设定最大的挂起长度

                //新建线程来处理连接请求
                acceptConnectReqThd = new Thread(AcceptConnectReqHandler);
                acceptConnectReqThd.IsBackground = true;
                acceptConnectReqThd.Start(socketWatch);  //把socket对象当做参数传递给到线程里面的方法
                foreach (Form openForm in Application.OpenForms)
                {
                    if (openForm is SOP)
                    {
                        form = openForm;
                    }
                }
                OperatResult = (RichTextBox)form.Controls["OperatResult"];
                dgv = (DataGridView)form.Controls["SendDGV"];
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        private void AcceptConnectReqHandler(object _socket)
        {
            try
            {
                //服务端的socket对象
                Socket serverSocket = (Socket)_socket;
                Watching = true;
                while (Watching)
                {
                    //获取客户端socket。Accept方法处理任何传入的连接请求，并返回可用于与远程主机通信数据的Socket对象，即客户端的socket。
                    //这一句话会卡主线程。只要没有新的链接进来，就会一直卡主不动（等待中）。
                    //收到连接事件后，会往下执行，通过while又回到这里继续等待
                    Socket clientSocket = serverSocket.Accept();
                    socket.Add(clientSocket);
                    //创建接受客户端消息的线程
                    Thread acceptMsgReqThd = new Thread(ReciveMsgReqHandler);
                    acceptMsgReqThd.IsBackground = true;
                    acceptMsgReqThd.Start(clientSocket);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("服务端处理连接事件异常:" + e.ToString());
            }
        }
        Form form = null;
        private void ReciveMsgReqHandler(object _socket)
        {
            Socket clientSocket = (Socket)_socket;
            try
            {
                while (true)
                {
                    //客户端连接成功后，接受来自客户端的消息
                    if (clientSocket == null)
                    {
                        continue;
                    }
                    byte[] buffer = new byte[1024];  //数据缓冲区。
                    //实际接收到的有效字节数
                    //Receive也是个卡线程的方法
                    //Console.WriteLine("等待接受客户端的数据:");
                    //OperatResult.AppendText("等待接受客户端的数据,"+ clientSocket+ "\n");
                    Console.WriteLine("等待接受客户端的数:");
                    int dataLength = clientSocket.Receive(buffer);
                    Console.WriteLine("接受到客户端的数据，字节数:" + dataLength);
                    //OperatResult.AppendText("接受到客户端的数据，字节数:" + dataLength);
                    //如果客户端关闭，发送的数据就为空，就跳出循环
                    if (dataLength == 0)
                    {
                        break;
                    }
                    //假设收到的是个字符串（先这么假定），转成字符串处理
                    string strMsg = Encoding.UTF8.GetString(buffer, 0, dataLength);
                    Console.WriteLine("接受到客户端的消息:" + strMsg);
                    for (int i = 0; i < dgv.Rows.Count; i++)
                    {
                        if (dgv.Rows[i].Cells["fp_name"].Value.ToString().Replace(".jpg", "") == strMsg.Replace("成功", ""))
                        {
                            Console.WriteLine(dgv.Rows[i].Cells["fp_name"].Value.ToString().Replace(".jpg", "") + strMsg.Replace("成功", ""));
                            dgv.Rows[i].Cells["issend"].Value = "发送成功";
                        }
                    }
                    OperatResult.AppendText("接受到客户端的消息:" + strMsg);
                }
                //中止当前线程
                //Thread.CurrentThread.Abort();
            }
            catch (Exception e)
            {
                SocketException socketExp = e as SocketException;
                if (socketExp != null && socketExp.NativeErrorCode == 10054)
                {
                    Console.WriteLine("socket客户端关闭:" + e.ToString());
                }
                else
                {
                    Console.WriteLine("======接受消息异常：" + e.ToString());
                }
                //中止当前线程
                Thread.CurrentThread.Abort();
            }
        }

        public void Send(string Command)
        {
            try
            {
                Console.WriteLine(Command);
                foreach (Socket item in socket)
                {
                    item.Send(Encoding.Default.GetBytes(Command));
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }

        public void Stop()
        {
            //acceptConnectReqThd.Interrupt();
            //acceptConnectReqThd.Abort();
            //foreach (Socket item in socket)
            //{
            //    item.Disconnect(true);
            //    item.Close();
            //}
            try
            {
                Watching = false;
                socketWatch.Close();
                socketWatch = null;
                socket.Clear();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message + ex.StackTrace);
            }
        }
    }
}