using S7.Net;
using System.Net;
using System.Text;
using BPASmartClient.S7Net;

namespace BPASmartClient.S7Net
{
    public class SiemensHelper
    {
        Plc myPlc;
        public bool IsConnected => myPlc is null ? false : myPlc.IsConnected;

        /// <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)
        {
            myPlc = new Plc(cpuType, ip, port, rack, solt);
            myPlc.Open();
        }

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

        public TResult Read<TResult>(string address)
        {
            if (!IsConnected) return default;
            var value = myPlc?.Read(address);
            if (typeof(TResult).Name == "Single")
            {
                var obj = ((uint)value).ConvertToFloat();
                return (TResult)Convert.ChangeType(obj, typeof(TResult));
            }
            else
            {
                return (TResult)Convert.ChangeType(value, typeof(TResult));
            }
        }

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

        public void WriteString(DataType dataType, int db, int startByteAdr, string value)
        {
            if (!IsConnected) return;
            var res = value.ToArrays();
            if (res != null)
            {
                List<byte> bytes = new List<byte>();
                bytes.Add((byte)res.Length);
                bytes.Add((byte)res.Length);
                bytes.AddRange(res);
                myPlc?.WriteBytes(dataType, db, startByteAdr, bytes.ToArray());
            }
        }

        public string Write<TValue>(string address, TValue value, int Retries = 1)
        {
            if (IsConnected)
            {
                int count = 0;
                if (Retries == 1 || Retries == 0)
                {
                    myPlc?.Write(address, value);
                    return $"成功，地址：{address}，值：{value}";
                }
                else
                {
                    while (count < Retries)
                    {
                        count++;
                        myPlc?.Write(address, value);
                        var res = myPlc?.Read(address);
                        if (res != null && res.ToString() == value.ToString())
                        {
                            break;
                        }
                    }
                    return $"成功，发送了{count}次，地址：{address}，值：{value}";
                }
            }
            else
            {
                return $"失败，地址：{address}，值：{value}，断开连接";
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="db">DB号</param>
        /// <param name="txt">字符串</param>
        /// <param name="startAddress">字节偏移地址</param>
        public void WriteString(int db, string txt, int startAddress = 0)
        {
            var temp = Encoding.ASCII.GetBytes(txt);
            var bytes = S7.Net.Types.S7String.ToByteArray(txt, temp.Length);
            myPlc.WriteBytes(DataType.DataBlock, db, startAddress, bytes);

        }
        public void WriteInt16(int db, short txt, int startAddress = 0)
        {
            var bytes = BitConverter.GetBytes(txt);
            myPlc.WriteBytes(DataType.DataBlock, db, startAddress, bytes);

        }
        public TResult ReadClass<TResult>(int db, int startByteAdr = 0) where TResult : class, new()
        {
            TResult sourceClass = new TResult();
            int num = (int)EntityClassResolution.GetClassSize(sourceClass);
            if (num <= 0) return sourceClass;
            if (IsConnected)
            {
                byte[] array = myPlc.ReadBytes(DataType.DataBlock, db, startByteAdr, num);
                EntityClassResolution.FromBytes(sourceClass, array);
            }
            return sourceClass;
        }

        public void WriteClass<TWriteModel>(TWriteModel sourceClass, int db, int startAddress = 0) where TWriteModel : class, new()
        {
            if (IsConnected)
            {
                byte[] array = new byte[(int)EntityClassResolution.GetClassSize(sourceClass)];
                EntityClassResolution.ToBytes(sourceClass, array);
                myPlc.WriteBytes(DataType.DataBlock, db, startAddress, array);
            }
        }

        //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;
        //}



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

    }
}