using FxpConvert.Common;
using System.Reflection;

namespace NIFPGA
{
    public sealed class FPGAArrayFXPWriteProperty : FPGABaseProperty
    {
        Interop.NiFpgaDll_ReadArrayU8 Read;
        Interop.NiFpgaDll_WriteArrayU8 Write;
        private NiFpga_FxpTypeInfo _TypeInfo;
        private IFxpConvert _Convert;
        private byte[] tempbuffer = new byte[0];
        private ulong[] tempvalue = new ulong[0];
        private double[] doubles = new double[0];
        internal FPGAArrayFXPWriteProperty(FPGASession session, uint indicator, uint count,NiFpga_FxpTypeInfo typeInfo, IFxpConvert convert) : base(session, indicator,false)
        {
            _Convert = convert;
            Count = count;
            tempvalue = new ulong[count];
            doubles = new double[count];
            _TypeInfo = typeInfo;
            tempbuffer = new byte[(int)Math.Ceiling(typeInfo.wordLength*count / 8.0)];
            Read = _Session.GetDelegate<Interop.NiFpgaDll_ReadArrayU8>();
            Write = _Session.GetDelegate<Interop.NiFpgaDll_WriteArrayU8>();
        }
        private double[] GetData()
        {
            _Session.CheckResult(Read(_Session.Session, Indicator, ref tempbuffer[0], (uint)tempbuffer.Length));
            string s = string.Empty;
            for(int i=0;i<tempbuffer.Length;i++)
            {
                s += tempbuffer[i].ToString("b").PadLeft(8, '0');
            }
            for(int i=0;i<tempvalue.Length;i++)
            {
                tempvalue[i] = System.Convert.ToUInt64(s.Substring(i * _TypeInfo.wordLength, _TypeInfo.wordLength), 2);
            }

            _Convert.FxpConvertToDouble(ref tempvalue[0], _TypeInfo, ref doubles[0], Count);
            return doubles;
        }
        private void SetData(double[] values)
        {
            if (values.Length != Count) return;
            _Convert.DoubleConvertToDxp(ref values[0], _TypeInfo, ref tempvalue[0], Count);
            string s = string.Empty;
            for(int i=0;i<tempvalue.Length;i++)
            {
                s += tempvalue[i].ToString("b").PadLeft(64, '0').Substring(64 - _TypeInfo.wordLength, _TypeInfo.wordLength);
            }
            for(int i=0;i< tempbuffer.Length;i++)
            {
                tempbuffer[i] = System.Convert.ToByte(s.Substring(i * 8, Math.Min(8, s.Length - i * 8)),2);
            }
            _Session.CheckResult(Write(_Session.Session,Indicator, ref tempbuffer[0], (uint)tempbuffer.Length));
        }
        public uint Count { get; }
        public double[] Value { get => GetData(); set => SetData(value); }
    }
}