using System;
using System.Collections;
using System.Linq;

namespace DTS.Serialization.IRIGCH10.Packets
{
    public class PCMDataPacket : AbstractDataPacket, IDataPacket
    {
        //Bit 30 Intra packet headers
        public bool HasIntraPacketHeader
        {
            get => GetCSDWBit(30);
            set => SetCSDWBit(30, value);
        }
        //Bit29 Major Frame Indicator
        //not applicable in throughput mode
        public bool IsMajorFrame
        {
            get => GetCSDWBit(29);
            set => SetCSDWBit(29, value);
        }
        //Bit28 IsMinorFrame
        //not applicable in throughput mode
        public bool IsMinorFrame
        {
            get => GetCSDWBit(28);
            set => SetCSDWBit(28, value);
        }
        public enum MinorFrameStatus
        {
            Reserved0 = 0,       //00
            Reserved1 = 1,       //01
            MinorFrameCheck = 2, //10
            MinorFrameLock = 3   //11
        }
        public enum MajorFrameStatus
        {
            MajorFrameNotLocked = 0, //00
            Reserved1 = 1,           //01
            MajorFrameCheck = 2,     //10
            MajorFrameLock = 3       //11
        }
        //bits 27-24
        //not applicable for throughput mode        
        public MinorFrameStatus LockStatus
        {
            get
            {
                var csdw = BitConverter.GetBytes(ChannelSpecificDataWord);
                var bits = new BitArray(csdw);
                return (MinorFrameStatus)Utils.Utils.BitArrayToInt32(bits, 24, 27);
            }
            set
            {
                var iValue = (int)value;
                var csdw = BitConverter.GetBytes(ChannelSpecificDataWord);
                var bits = new BitArray(csdw);
                Utils.Utils.SetBits(bits, (uint)iValue, 24, 27);
                var ret = new Byte[sizeof(uint)];
                bits.CopyTo(ret, 0);
                ChannelSpecificDataWord = BitConverter.ToUInt32(ret, 0);
            }
        }
        //bit 21
        public bool Is32BitAligned
        {
            get => GetCSDWBit(21);
            set => SetCSDWBit(21, value);
        }
        //bit 20
        public bool IsThroughputMode
        {
            get => GetCSDWBit(20);
            set => SetCSDWBit(20, value);
        }

        //bit 19 packed mode
        public bool IsPackedMode
        {
            get => GetCSDWBit(19);
            set => SetCSDWBit(19, value);
        }
        //bit 18 unpacked mode
        public bool IsUnpackedMode
        {
            get => GetCSDWBit(18);
            set => SetCSDWBit(18, value);
        }
        /// <summary>
        /// it seems the EMC ch10 validation tool only supports CH10 106v5, so use this header value for the analog packet when in this mode
        /// whether to include secondary time header or not
        /// 33199 Add Time format 1 as an export option for CH 10 export
        /// </summary>
        private const byte DATA_VERSION = 0x06;
        public PCMDataPacket(int nanoseconds, int seconds,
            Chapter10File.GetNextSampleDelegate getNextSample, int totalChannels, long channelLength, long rtc, long numSamples, long currentSample, byte sequenceNumber,
            ushort channelId, bool includeSecondaryHeader) : base(Enums.DataFileDataTypes.PCMDataFormat1, includeSecondaryHeader)
        {
            HasIntraPacketHeader = includeSecondaryHeader;
            IsMajorFrame = false;
            IsMinorFrame = false;
            LockStatus = MinorFrameStatus.Reserved0;
            IsThroughputMode = true;
            Is32BitAligned = false;
            IsPackedMode = false;
            IsUnpackedMode = false;

            //4 bytes for CSDW, then 4 bytes for a PCM FRAMESYNC??? this isn't in the spec but f/w is using it
            var dataLength = Convert.ToUInt32(4 + 2 * totalChannels * numSamples + 4*numSamples);

            var offset = CommonHeaderWork(channelId, DATA_VERSION, sequenceNumber, rtc, dataLength, nanoseconds, seconds);            
            for (var sampleIdx = 0; sampleIdx < numSamples; sampleIdx++)
            {
                Buffer.BlockCopy(new byte[] { 0x6B, 0xFE, 0x40, 0x28 }, 0, _dataBytes, offset, 4);
                offset += 4;
                for (var chIdx = 0; chIdx < totalChannels; chIdx++)
                {
                    var signed = getNextSample(chIdx);
                    var unsigned = (ushort)(((signed - 0x8000 & 0x00FF) << 8) | ((signed - 0x8000 >> 8) & 0x00FF));
                    var bytes = BitConverter.GetBytes(unsigned).Reverse().ToArray();
                    Buffer.BlockCopy(bytes, 0, _dataBytes, offset, 2);
                    offset += 2;
                }
                currentSample++;
            }
        }
        public PCMDataPacket() : base(Enums.DataFileDataTypes.PCMDataFormat1, true)
        {
        }
        public PCMDataPacket(byte[] bytes) : base (bytes)
        {

        }
        public PCMDataPacket(bool _) : base(UDP_DATA) 
        { 
        }

        private static readonly byte[] UDP_DATA = { 0x25, 0xeb, 0x03, 0x00, 0x98, 0x05, 0x00, 0x00, 0x74, 0x05, 0x00, 0x00,
0x06, 0x65, 0xc4, 0x09, 0x21, 0xe5, 0x5d, 0xed, 0x07, 0x00, 0x83, 0x37, 0x42, 0x89, 0x77, 0x2a,
0x4c, 0x0d, 0x00, 0x00, 0x00, 0x00, 0xc5, 0x01, 0x00, 0x00, 0x10, 0x00, 0x6b, 0xfe, 0x40, 0x28,
0x04, 0x80, 0xe3, 0x7f, 0xcf, 0x7f, 0xe1, 0x7f, 0xee, 0x7f, 0xea, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x07, 0x80, 0xe7, 0x7f, 0xcf, 0x7f, 0xe7, 0x7f, 0xf3, 0x7f, 0xee, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x04, 0x80, 0xe5, 0x7f, 0xcd, 0x7f, 0xe2, 0x7f, 0xf1, 0x7f, 0xed, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x05, 0x80, 0xe9, 0x7f, 0xcd, 0x7f, 0xe2, 0x7f, 0xf1, 0x7f, 0xeb, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x07, 0x80, 0xe9, 0x7f, 0xcd, 0x7f, 0xec, 0x7f, 0xf3, 0x7f, 0xf1, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x06, 0x80, 0xe3, 0x7f, 0xce, 0x7f, 0xe6, 0x7f, 0xee, 0x7f, 0xee, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x02, 0x80, 0xe1, 0x7f, 0xc9, 0x7f, 0xdc, 0x7f, 0xec, 0x7f, 0xea, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x04, 0x80, 0xe7, 0x7f, 0xc5, 0x7f, 0xe7, 0x7f, 0xef, 0x7f, 0xed, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x05, 0x80, 0xed, 0x7f, 0xca, 0x7f, 0xe3, 0x7f, 0xf0, 0x7f, 0xf2, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x04, 0x80, 0xe5, 0x7f, 0xca, 0x7f, 0xe2, 0x7f, 0xec, 0x7f, 0xec, 0x7f, 0x6b, 0xfe, 0x40, 0x28,
0x04, 0x80, 0xe6, 0x7f, 0xcc, 0x7f, 0xe5, 0x7f, 0xec, 0x7f, 0xed, 0x7f, 0x6b, 0xfe, 0x40, 0x28 };/*,
   0x06, 80, e7, 7f, cc, 7f, e6, 7f, f0, 7f, ef, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, d2, 7f, e4, 7f, f0, 7f, f2, 7f, 6b, fe, 40, 28,
   0x04, 80, eb, 7f, cc, 7f, e7, 7f, e9, 7f, ed, 7f, 6b, fe, 40, 28,
   0x03, 80, e7, 7f, d1, 7f, ed, 7f, ef, 7f, f1, 7f, 6b, fe, 40, 28,
   0x06, 80, ec, 7f, d7, 7f, e9, 7f, f2, 7f, ee, 7f, 6b, fe, 40, 28,
   0x07, 80, ed, 7f, cf, 7f, e7, 7f, f1, 7f, f0, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, d0, 7f, e6, 7f, f0, 7f, f0, 7f, 6b, fe, 40, 28,
   0x03, 80, e7, 7f, cf, 7f, e2, 7f, f0, 7f, ee, 7f, 6b, fe, 40, 28,
   0x04, 80, e6, 7f, c8, 7f, dc, 7f, ef, 7f, ed, 7f, 6b, fe, 40, 28,
   0x06, 80, ec, 7f, cc, 7f, e4, 7f, f2, 7f, f0, 7f, 6b, fe, 40, 28,
   0x06, 80, eb, 7f, c9, 7f, e8, 7f, f1, 7f, ec, 7f, 6b, fe, 40, 28,
   0x02, 80, e9, 7f, c6, 7f, e6, 7f, ed, 7f, ef, 7f, 6b, fe, 40, 28,
   0x03, 80, e1, 7f, c9, 7f, e2, 7f, e9, 7f, ef, 7f, 6b, fe, 40, 28,
   0xff, 7f, e2, 7f, c8, 7f, de, 7f, ea, 7f, eb, 7f, 6b, fe, 40, 28,
   0x03, 80, e6, 7f, ca, 7f, df, 7f, f0, 7f, ef, 7f, 6b, fe, 40, 28,
   0x00, 80, e7, 7f, cb, 7f, e2, 7f, f0, 7f, ec, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, d1, 7f, df, 7f, ef, 7f, f0, 7f, 6b, fe, 40, 28,
   0x04, 80, eb, 7f, d0, 7f, e5, 7f, ed, 7f, f0, 7f, 6b, fe, 40, 28,
   0x07, 80, e9, 7f, d3, 7f, ee, 7f, ef, 7f, ef, 7f, 6b, fe, 40, 28,
   0x04, 80, eb, 7f, ca, 7f, e1, 7f, ef, 7f, ef, 7f, 6b, fe, 40, 28,
   0x06, 80, e9, 7f, d0, 7f, e6, 7f, f2, 7f, f3, 7f, 6b, fe, 40, 28,
   0x06, 80, e3, 7f, d2, 7f, e6, 7f, f2, 7f, f1, 7f, 6b, fe, 40, 28,
   0x05, 80, ed, 7f, cf, 7f, e9, 7f, ed, 7f, f5, 7f, 6b, fe, 40, 28,
   0x04, 80, ed, 7f, d0, 7f, e6, 7f, ed, 7f, ef, 7f, 6b, fe, 40, 28,
   0x06, 80, e8, 7f, cf, 7f, ec, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0x06, 80, ea, 7f, cc, 7f, e8, 7f, ec, 7f, ec, 7f, 6b, fe, 40, 28,
   0x00, 80, eb, 7f, c9, 7f, e5, 7f, ef, 7f, ed, 7f, 6b, fe, 40, 28,
   0x03, 80, de, 7f, ce, 7f, e7, 7f, eb, 7f, f1, 7f, 6b, fe, 40, 28,
   0x05, 80, e1, 7f, c6, 7f, e0, 7f, f0, 7f, ec, 7f, 6b, fe, 40, 28,
   0x01, 80, df, 7f, c7, 7f, df, 7f, e9, 7f, e9, 7f, 6b, fe, 40, 28,
   0x05, 80, e4, 7f, cd, 7f, e0, 7f, ea, 7f, eb, 7f, 6b, fe, 40, 28,
   0x04, 80, ea, 7f, ca, 7f, de, 7f, ed, 7f, ee, 7f, 6b, fe, 40, 28,
   0x03, 80, e7, 7f, c9, 7f, de, 7f, ef, 7f, ec, 7f, 6b, fe, 40, 28,
   0x05, 80, e5, 7f, c9, 7f, df, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0x04, 80, e3, 7f, d0, 7f, e2, 7f, ed, 7f, f0, 7f, 6b, fe, 40, 28,
   0x02, 80, e3, 7f, ce, 7f, e0, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0x06, 80, f0, 7f, cc, 7f, e3, 7f, ee, 7f, ef, 7f, 6b, fe, 40, 28,
   0x04, 80, ed, 7f, d0, 7f, e4, 7f, f3, 7f, ea, 7f, 6b, fe, 40, 28,
   0x06, 80, eb, 7f, c8, 7f, e6, 7f, ec, 7f, ea, 7f, 6b, fe, 40, 28,
   0x04, 80, e9, 7f, ce, 7f, e3, 7f, ee, 7f, f0, 7f, 6b, fe, 40, 28,
   0x09, 80, e9, 7f, d1, 7f, e5, 7f, ea, 7f, eb, 7f, 6b, fe, 40, 28,
   0x07, 80, eb, 7f, ce, 7f, e6, 7f, f0, 7f, ec, 7f, 6b, fe, 40, 28,
   0x04, 80, ea, 7f, ce, 7f, e4, 7f, eb, 7f, ed, 7f, 6b, fe, 40, 28,
   0x08, 80, ed, 7f, ce, 7f, e8, 7f, ef, 7f, ef, 7f, 6b, fe, 40, 28,
   0x08, 80, ee, 7f, ce, 7f, e7, 7f, ef, 7f, ee, 7f, 6b, fe, 40, 28,
   0x05, 80, e3, 7f, cb, 7f, e0, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0x02, 80, e4, 7f, d0, 7f, e0, 7f, ed, 7f, ee, 7f, 6b, fe, 40, 28,
   0x00, 80, e7, 7f, cb, 7f, e5, 7f, e9, 7f, ed, 7f, 6b, fe, 40, 28,
   0x02, 80, df, 7f, cb, 7f, e3, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0xff, 7f, e3, 7f, cf, 7f, ea, 7f, f0, 7f, eb, 7f, 6b, fe, 40, 28,
   0x02, 80, e3, 7f, cc, 7f, e2, 7f, ef, 7f, f0, 7f, 6b, fe, 40, 28,
   0x03, 80, e5, 7f, d3, 7f, e4, 7f, f1, 7f, ef, 7f, 6b, fe, 40, 28,
   0x07, 80, e9, 7f, ce, 7f, e6, 7f, f2, 7f, ed, 7f, 6b, fe, 40, 28,
   0x04, 80, ed, 7f, cf, 7f, e6, 7f, ec, 7f, f1, 7f, 6b, fe, 40, 28,
   0x05, 80, ef, 7f, d5, 7f, e6, 7f, ec, 7f, f1, 7f, 6b, fe, 40, 28,
   0x07, 80, e7, 7f, d1, 7f, e8, 7f, f1, 7f, ef, 7f, 6b, fe, 40, 28,
   0x06, 80, e7, 7f, cc, 7f, e1, 7f, ed, 7f, ef, 7f, 6b, fe, 40, 28,
   0x02, 80, e6, 7f, cb, 7f, e7, 7f, f1, 7f, ef, 7f, 6b, fe, 40, 28,
   0x04, 80, e5, 7f, ce, 7f, e9, 7f, ed, 7f, ee, 7f, 6b, fe, 40, 28,
   0x04, 80, e3, 7f, cd, 7f, e6, 7f, ec, 7f, ed, 7f, 6b, fe, 40, 28,
   0x00, 80, ea, 7f, cd, 7f, e8, 7f, ed, 7f, ef, 7f, 6b, fe, 40, 28,
   0x03, 80, e7, 7f, c8, 7f, e9, 7f, f3, 7f, ed, 7f, 6b, fe, 40, 28,
   0x03, 80, e5, 7f, cb, 7f, e3, 7f, f1, 7f, f0, 7f, 6b, fe, 40, 28,
   0x02, 80, e3, 7f, ce, 7f, df, 7f, f0, 7f, ed, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, ca, 7f, e0, 7f, ef, 7f, ee, 7f, 6b, fe, 40, 28,
   0x06, 80, e7, 7f, d3, 7f, e5, 7f, f0, 7f, ed, 7f, 6b, fe, 40, 28,
   0x01, 80, e9, 7f, c9, 7f, e2, 7f, ef, 7f, ed, 7f, 6b, fe, 40, 28,
   0x02, 80, df, 7f, c8, 7f, e1, 7f, ed, 7f, eb, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, ca, 7f, e4, 7f, ee, 7f, ea, 7f, 6b, fe, 40, 28,
   0x04, 80, e7, 7f, d1, 7f, e6, 7f, f0, 7f, ec, 7f, 6b, fe, 40, 28,
   0x02, 80, df, 7f, cc, 7f, e6, 7f, eb, 7f, ef, 7f, 6b, fe, 40, 28,
   0x05, 80, e7, 7f, d1, 7f, e4, 7f, ee, 7f, ed, 7f, 6b, fe, 40, 28,
   0x07, 80, e9, 7f, cf, 7f, e9, 7f, ec, 7f, ec, 7f, 6b, fe, 40, 28,
   0x03, 80, e7, 7f, cb, 7f, e7, 7f, ed, 7f, ed, 7f, 6b, fe, 40, 28,
   0x06, 80, e3, 7f, cf, 7f, e4, 7f, f1, 7f, ec, 7f, 6b, fe, 40, 28,
   0x07, 80, e8, 7f, cc, 7f, e9, 7f, f2, 7f, ed, 7f
}*/
        //public AnalogDataFormat1Packet(byte[] bytes) : base(bytes)
        //{
        //    var offset = IRIGCH10.PacketHeader.PACKET_HEADER_LENGTH;

        //    if (PacketHeader.SecondaryHeaderPresent)
        //    {
        //        var secondaryHeaderBytes = new byte[SecondaryTimeFormatHeader.SECONDARY_TIME_HEADER_LENGTH];
        //        Buffer.BlockCopy(bytes, offset,
        //            secondaryHeaderBytes, 0, SecondaryTimeFormatHeader.SECONDARY_TIME_HEADER_LENGTH);
        //        var secondaryHeader = new SecondaryTimeFormatHeader(secondaryHeaderBytes);
        //        LocalTimeOfFirstSample = secondaryHeader.LocalTime;
        //        offset += SecondaryTimeFormatHeader.SECONDARY_TIME_HEADER_LENGTH;
        //    }

        //    ChannelSpecificDataWord = BitConverter.ToUInt32(bytes, offset);
        //    offset += sizeof(uint);
        //    var numChannels = TotChan;
        //    var sizeOf1SampleForAllChannels = sizeof(ushort) * numChannels;
        //    //There's a CSDW in the data section, then all ADC data.  CSDW is uint, 4 bytes
        //    var numSamples = (PacketHeader.DataLength - 4) / sizeOf1SampleForAllChannels;

        //    Samples = new SampleData[numSamples];
        //    for (var i = 0; i < Samples.Length; i++)
        //    {
        //        var channels = GetChannels(bytes, offset, numChannels);
        //        Samples[i] = new SampleData(channels);
        //        offset += sizeOf1SampleForAllChannels;
        //    }
        //}

    }
}