using S7.Net;

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 object Read(string address)
        {
            if (!IsConnected) return default;
            return myPlc?.Read(address);
        }

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

        public void Write(string address, object value)
        {
            myPlc?.Write(address, value);
        }

        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);
        }

    }
}