using FxpConvert.Common;
using System.Runtime.CompilerServices;

namespace NIFPGA
{
    public sealed class FPGAFXPWriteProperty: FPGABaseProperty
    {
        Interop.NiFpgaDll_ReadU64 Read;
        Interop.NiFpgaDll_WriteU64 Write;
        private object _Lock = new object();
        private NiFpga_FxpTypeInfo _TypeInfo;
        private IFxpConvert _Convert;
        internal FPGAFXPWriteProperty(FPGASession session, uint indicator,NiFpga_FxpTypeInfo typeInfo,IFxpConvert convert) : base(session, indicator,false)
        {
            _TypeInfo = typeInfo;
            _Convert = convert;
            Read = _Session.GetDelegate<Interop.NiFpgaDll_ReadU64>();
            Write = _Session.GetDelegate<Interop.NiFpgaDll_WriteU64>();
        }
        private double GetValue()
        {
            lock (_Lock)
            {
                ulong value = 0;
                double temp = 0;
                _Session.CheckResult(Read(_Session.Session, Indicator, ref value));
                _Convert.FxpConvertToDouble(ref value, _TypeInfo, ref temp, 1);
                return temp;
            }
        }
        private void SetValue(double value)
        {
            lock (_Lock)
            {
                ulong tempul = 0;
                _Session.CheckResult(Read(_Session.Session, Indicator, ref tempul));
                ulong temp = 0;
                _Convert.DoubleConvertToDxp(ref value, _TypeInfo, ref temp, 1);
                if (temp == tempul) return;
                var _ = _TypeInfo.wordLength switch
                {
                    var x when x <= 8 => _Session.CheckResult(_Session.GetDelegate<Interop.NiFpgaDll_WriteU8>()(_Session.Session, Indicator, Unsafe.As<ulong, byte>(ref temp))),
                    var x when x > 8 && x <= 16 => _Session.CheckResult(_Session.GetDelegate<Interop.NiFpgaDll_WriteU16>()(_Session.Session, Indicator, Unsafe.As<ulong, ushort>(ref temp))),
                    var x when x > 16 && x <= 32 => _Session.CheckResult(_Session.GetDelegate<Interop.NiFpgaDll_WriteU32>()(_Session.Session, Indicator, Unsafe.As<ulong, uint>(ref temp))),
                    var x when x > 32 && x <= 64 => _Session.CheckResult(_Session.GetDelegate<Interop.NiFpgaDll_WriteU64>()(_Session.Session, Indicator, temp)),
                    _ => _Session.CheckResult(_Session.GetDelegate<Interop.NiFpgaDll_WriteU64>()(_Session.Session, Indicator, temp)),
                };
                //_Session.CheckResult(Write(_Session.Session, Indicator, temp));
            }
        }
        public double Value { get => GetValue(); set => SetValue(value); }
    }
}