using System;
using System.Collections.Generic;
using System.Net.Sockets;
using HH.WCS.Mobox3.HaiCheng.Util.Helper;

namespace HH.WCS.Mobox3.HaiCheng.Util.EquipmentCommunication
{
    internal class TcpClient
    {
        /// <summary>
        /// 
        /// </summary>
        /// <param name="ip">127.0.0.1</param>
        /// <param name="port">8888</param>
        /// <param name="hex">01 02 00 00 00 0C 78 0F</param>
        /// <returns></returns>
        private static string SendHexOnce(string ip, int port, string hex) {
            var res = string.Empty;
            Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            client.Connect(ip, port);
            client.ReceiveTimeout = 2000;
            if (client.Connected) {
                client.Send(PlcHelper.Hex2Bytes(hex));
                byte[] buffer = new byte[1024];
                try {
                    var length = client.Receive(buffer, SocketFlags.None);
                    byte[] data = new byte[length];
                    Array.Copy(buffer, data, length);
                    res = BitConverter.ToString(data).Replace("-", "");
                }
                catch (Exception ex) {
                    LogHelper.Error(ex.Message, ex);
                }
                client.Disconnect(true);
                client.Dispose();
            }
            client = null;
            return res;
        }

        /// <summary>
        /// 读保持寄存器
        /// </summary>
        /// <param name="address"></param>
        /// <param name="qty"></param>
        /// <param name="ip"></param>
        /// <param name="port"></param>
        /// <returns></returns>
        internal int[] ReadInputRegistersRtu(int address, int qty, string ip, int port = 502) {
            List<int> res = new List<int>();
            var hex = $"0103{address.ToString("X4")}{qty.ToString("X4")}";
            hex = hex + BitConverter.ToString(PlcHelper.CRC16LH(PlcHelper.Hex2Bytes(hex))).Replace("-", "").Replace(" ", "");
            var data = SendHexOnce(ip, port, hex);
            if (!string.IsNullOrEmpty(data)) {
                if (PlcHelper.CheckCRC(data)) {
                    var lenght = Convert.ToInt16(data.Substring(4, 2), 16) / 2;
                    for (int i = 0; i < lenght; i++) {
                        res[i] = Convert.ToInt16(data.Substring(6 + 4 * 1, 4), 16);
                    }
                }
            }
            return res.ToArray();
        }
        /// <summary>
        /// 写单个寄存器
        /// </summary>
        /// <param name="address"></param>
        /// <param name="value"></param>
        /// <param name="ip"></param>
        /// <param name="port"></param>
        internal bool WriteSingleRegisterRtu(int address, int value, string ip, int port = 502) {
            var res = false;
            var hex = $"0106{address.ToString("X4")}{value.ToString("X4")}";
            hex = hex + BitConverter.ToString(PlcHelper.CRC16LH(PlcHelper.Hex2Bytes(hex))).Replace("-", "").Replace(" ", "");
            var data = SendHexOnce(ip, port, hex);
            if (!string.IsNullOrEmpty(data)) {
                res = true;
            }
            return res;
        }
    }
}