using NModbus;
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.Threading.Tasks;

namespace GummingControl
{
    public class DTM
    {
        private static ModbusFactory modbusFactory;
        private static IModbusMaster master;
        private static string IP = "192.168.1.5";
        private static int Port = 502;
        
        public static void CreateLink()
        {
            if (!Global.IsRelease)
            {
                return;
            }
            //实际不起作用CancellationTokenSource cancellation = new CancellationTokenSource();
            //cancellation.CancelAfter(TimeSpan.FromSeconds(1));
            bool WaitDone = false;
            bool AnyError = false;
            bool IsExecuteDone = false;
            Thread tr1 = new Thread(new ThreadStart((Action)(() =>
            {
                try
                {
                    IsExecuteDone = false;
                    //初始化modbusmaster
                    modbusFactory = new ModbusFactory();
                    //在本地测试 所以使用回环地址,modbus协议规定端口号 502
                    var client = new TcpClient();
                    client.SendTimeout = 1000;
                    client.ReceiveTimeout = 1000;
                    client.Connect(IP, Port);
                    master = modbusFactory.CreateMaster(client);
                    //设置读取超时时间
                    master.Transport.ReadTimeout = 1000;
                    master.Transport.Retries = 1;
                    master.Transport.WriteTimeout = 1000;
                    IsExecuteDone = true;                    
                }
                catch
                {
                    AnyError = true;
                }
                WaitDone = true;
            })));
            tr1.IsBackground = true;
            tr1.Start();

            //timeout check thread
            Thread tr2 = new Thread(new ThreadStart((Action)(() =>
            {
                try
                {
                    Thread.Sleep(2000);
                    if (!IsExecuteDone)
                    {
                        AnyError = true;
                        tr1.Abort();
                        WaitDone = true;
                    }
                }
                catch { }
            })));
            tr2.IsBackground = true;
            tr2.Start();

            while (!WaitDone)
            {
                Thread.Sleep(50);
            }
            if (AnyError)
            {
                Global.DTMWaitError = true;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="slaveAddress">0</param>
        /// <param name="startAddress">0</param>
        /// <param name="numberOfPoints">0</param>
        /// <returns></returns>
        public static ushort[] Read(byte slaveAddress, ushort startAddress, ushort numberOfPoints)
        {
            if (!Global.IsRelease)
            {
                return new ushort[] { (ushort)new Random().Next(800), (ushort)new Random().Next(200), 250, 310, 400, 330, 650, 210 };
            }
            try
            {
                ushort[] registerBuffer = master.ReadHoldingRegisters(slaveAddress, startAddress, numberOfPoints);
                return registerBuffer;
            }
            catch
            {
                //尝试两次重连
                Thread.Sleep(100);
                CreateLink();
                ushort[] registerBuffer = master.ReadHoldingRegisters(slaveAddress, startAddress, numberOfPoints);
                return registerBuffer;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="slaveAddress">0</param>
        /// <param name="startAddress">0</param>
        /// <param name="numberOfPoints">0</param>
        /// <returns></returns>
        public static void Write(byte slaveAddress, ushort startAddress, ushort value)
        {
            if (!Global.IsRelease)
            {
                return;
            }
            try
            {
                master.WriteSingleRegister(slaveAddress, startAddress, value);
            }
            catch
            {
                //尝试两次重连
                Thread.Sleep(100);
                CreateLink();
                master.WriteSingleRegister(slaveAddress, startAddress, value);
            }
        }
    }
}