// Reciver Control Program
// Coded by UTAH
// Create 2014/12/30

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Net;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace SUPRXCLV00
{


    public partial class Form1 : Form
    {

        // COMMON DATA AREAS
        char UDPopen_FLG = ' ';
        string remoteHost;          // IP ADDRESS
        Int32  remotePort = 10040;  // PROT-NO

        // UDP init

        // UDP USE
        System.Net.Sockets.UdpClient UDP = new System.Net.Sockets.UdpClient(10040);
        // UDP CHECK PROC
        private delegate void Delegate_RcvData(string Rdata, Int32 Rleng);



        public Form1()
        {
            InitializeComponent();
        }

// UDP read PROC
        public void UDP_read_PROC()
        {
            string rcvMsg;
            // UDP read
            while (UDPopen_FLG == 'O') 
            {
                try
                {
                    System.Text.Encoding enc = System.Text.Encoding.UTF8;
                    Console.WriteLine("UDP_read started");
                    System.Net.IPEndPoint remoteEP = null;
                    byte[] rcvBytes = UDP.Receive(ref remoteEP);
                    rcvMsg = enc.GetString(rcvBytes);
                    //textBoxUDPrdata.Text = rcvMsg;
                    Console.WriteLine("RCV Data:{0}", rcvMsg);
                    Console.WriteLine("RCV adrs:{0}/Port-NO:{1}",
                        remoteEP.Address, remoteEP.Port);


                    Invoke(new Delegate_RcvData(UDPproc), new Object[] { rcvMsg, rcvMsg.Length });
                }
                catch (Exception ex)
                {
                    //MessageBox.Show(ex.Message, "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    UDPopen_FLG = 'C';  // close
                }
            }
            Console.WriteLine("end of UDP_read");
        }

// UDP RECIVE DATA PROC
        private void UDPproc(string Rdata, Int32 Rleng)
        {
            Console.WriteLine("UDP Data:{0}", Rdata);
            textBoxUDPrdata.Text = Rdata;
        }

// UDP WRITE DATA PROC
        private void UDPsend(string Sdata)
        {
            if (UDPopen_FLG == 'O') // UDP opened ?
            {
                System.Text.Encoding enc = System.Text.Encoding.UTF8;
                byte[] sendBytes = enc.GetBytes(Sdata);
                UDP.Send(sendBytes, sendBytes.Length);
            }
        }

// UDP connect PROC
        private void button_UDPConn_Click(object sender, EventArgs e)
        {
            if (UDPopen_FLG == ' ') // UDP open ?
            {
                // use UTF8 code
                System.Text.Encoding enc = System.Text.Encoding.UTF8;
                // remote IP & Port-no
                remoteHost = textBox_UDPIPadr.Text;
                UDP.Connect(remoteHost, remotePort);

                // Make task for UDP_read_PROC 
                // Make object
                System.Threading.Thread UDP_task =
                    new System.Threading.Thread(
                    new System.Threading.ThreadStart(UDP_read_PROC));
                // run UDP_task
                UDP_task.Start();

                button_UDPConn.Text = "stop";
                UDPopen_FLG = 'O';      // Open
            }
            else
            {
                // clode UDP
                UDP.Close();
                button_UDPConn.Text = "end ";
                UDPopen_FLG = 'C';      // Close
                Application.Exit();

            }
        }

        private void buttonUDPsend_Click(object sender, EventArgs e)
        {
            //送信データを指定する
            UDPsend(textBoxUDPsdata.Text);
         }


    }   // Form1 END
}       // name space end