using S7.Net;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HKControl
{
    internal class Siemens : CommunicationBase
    {
        Plc myPlc;
        public bool IsConnected => myPlc is null ? false : myPlc.IsConnected;

        private CpuType myCpuType;
        private string MyIp;
        private int Myport;
        private bool IsStartConnect = false;

        /// <summary>
        /// 打开连接
        /// </summary>
        /// <param name="cpuType">PLC CPU 类型</param>
        /// <param name="ip">plc ip 地址</param>
        /// <param name="port">plc 端口号</param>
        /// <param name="rack">PLC 机架号</param>
        /// <param name="solt"> PLC 插槽号</param>
        public void Connect(CpuType cpuType, string ip, int port = 102, short rack = 0, short solt = 0)
        {
            try
            {
                myCpuType = cpuType;
                MyIp = ip;
                Myport = port;
                myPlc = new Plc(cpuType, ip, port, rack, solt);
                while (!myPlc.IsConnected)
                {
                    myPlc.Open();
                    if (!myPlc.IsConnected) Thread.Sleep(3000);
                }

                if (myPlc.IsConnected)
                {
                    IsStartConnect = false;
                    ConnectOk?.Invoke();
                    HKLog.HKLogImport.WriteInfo($"设备{ip}连接成功");
                    //Debug.WriteLine($"设备{ip}连接成功");
                }
            }
            catch (Exception ex)
            {
                HKLog.HKLogImport.WriteInfo($"设备连接出错：{ip}");
                Thread.Sleep(3000);
                Connect(cpuType, ip, port);
                //Debug.WriteLine(ex.ToString());
            }

        }

        private void ExceptionDis()
        {
            if (IsStartConnect)
            {
                myPlc?.Close();
                myPlc = null;
                Connect(myCpuType, MyIp, Myport);
            }
            IsStartConnect = true;
        }


        /// <summary>
        /// 断开和PLC的连接
        /// </summary>
        public void Disconnect()
        {
            myPlc?.Close();
        }

        public TResult Read<TResult>(string address)
        {
            try
            {
                if (!IsConnected)
                {
                    ExceptionDis();
                    return default;
                } 
                return (TResult)myPlc?.Read(address);
            }
            catch (Exception ex)
            {
                ExceptionDis();
                return default;
            }

        }

        public bool[] ReadBools(int address, int count)
        {
            if (!IsConnected) return default;
            var res = Read(DataType.Memory, 0, address, VarType.Bit, count);
            if (res != null && res is bool[] bools) return bools;
            return default;
        }

        public ushort[] ReadMW(int address, int count)
        {
            if (!IsConnected) return default;
            var res = Read(DataType.Memory, 0, address, VarType.Word, count);
            if (res != null && res is ushort[] ReturnValue) return ReturnValue;
            return default;
        }

        public float[] ReadMD(int address, int count)
        {
            if (!IsConnected) return default;
            var res = Read(DataType.Memory, 0, address, VarType.Real, count);
            if (res != null && res is float[] ReturnValue) return ReturnValue;
            return default;
        }

        private object Read(DataType dataType, int db, int address, VarType varType, int count)
        {
            try
            {
                if (!IsConnected) return default;
                return myPlc?.Read(dataType, db, address, varType, count);
            }
            catch (Exception ex)
            {
                ExceptionDis();
                return default;
            }

        }

        public void Write<TValue>(string address, TValue value)
        {
            try
            {
                myPlc?.Write(address, value);
            }
            catch (Exception ex)
            {
                ExceptionDis();
            }

        }

        public ReadT ReadStruct<ReadT>(int db, int startAddress = 0)
        {
            if (!IsConnected) return default;
            return (ReadT)myPlc.ReadStruct(typeof(ReadT), db, startAddress);
        }

        public void WriteStruct(object structValue, int db, int startAddress = 0)
        {
            myPlc?.WriteStruct(structValue, db, startAddress);
        }

        public int ReadClass(object sourceClass, int db, int startAddress = 0)
        {
            if (!IsConnected) return -1;
            return myPlc.ReadClass(sourceClass, db, startAddress);
        }

        public TResult ReadClass<TResult>(int db, int startAddress = 0) where TResult : class
        {
            if (!IsConnected) return default;
            return myPlc.ReadClass<TResult>(db, startAddress);
        }

        public void WriteClass(object sourceClass, int db, int startAddress = 0)
        {
            myPlc?.WriteClass(sourceClass, db, startAddress);
        }
    }
}