// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : TrackInformation.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Device structures decoders.
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2023 Natalia Portillo
// ****************************************************************************/

using System.Diagnostics.CodeAnalysis;

namespace Aaru.Decoders.SCSI.MMC;

[SuppressMessage("ReSharper", "InconsistentNaming")]
public class TrackInformation
{
    public bool                     Blank;
    public bool                     Copy;
    public bool                     Damage;
    public ushort                   DataLength;
    public byte                     DataMode;
    public uint                     FixedPacketSize;
    public bool                     FP;
    public uint                     FreeBlocks;
    public uint                     LastLayerJumpAddress;
    public uint                     LastRecordedAddress;
    public LayerJumpRecordingStatus LayerJumpRecordingStatus;
    public ushort                   LogicalTrackNumber;
    public uint                     LogicalTrackSize;
    public uint                     LogicalTrackStartAddress;
    public bool                     LraV;
    public uint                     NextLayerJumpAddress;
    public uint                     NextWritableAddress;
    public bool                     NwaV;
    public bool                     Packet;
    public uint                     ReadCompatibilityLba;
    public bool                     RT;
    public ushort                   SessionNumber;
    public byte                     TrackMode;

    public static TrackInformation Decode(byte[] response)
    {
        if(response.Length < 32)
            return null;

        var decoded = new TrackInformation
        {
            DataLength               = (ushort)((response[0] << 8) + response[1]),
            LogicalTrackNumber       = response[2],
            SessionNumber            = response[3],
            LayerJumpRecordingStatus = (LayerJumpRecordingStatus)(response[5] >> 6),
            Damage                   = (response[5]       & 0x20) == 0x20,
            Copy                     = (response[5]       & 0x10) == 0x10,
            TrackMode                = (byte)(response[5] & 0xF),
            RT                       = (response[6]       & 0x80) == 0x80,
            Blank                    = (response[6]       & 0x40) == 0x40,
            Packet                   = (response[6]       & 0x20) == 0x20,
            FP                       = (response[6]       & 0x10) == 0x10,
            DataMode                 = (byte)(response[6] & 0xF),
            LraV                     = (response[7]       & 0x02) == 0x02,
            NwaV                     = (response[7]       & 0x01) == 0x01,
            LogicalTrackStartAddress =
                (uint)((response[8] << 24) + (response[9] << 16) + (response[10] << 8) + response[11]),
            NextWritableAddress =
                (uint)((response[12] << 24) + (response[13] << 16) + (response[14] << 8) + response[15]),
            FreeBlocks       = (uint)((response[16] << 24) + (response[17] << 16) + (response[18] << 8) + response[19]),
            FixedPacketSize  = (uint)((response[20] << 24) + (response[21] << 16) + (response[22] << 8) + response[23]),
            LogicalTrackSize = (uint)((response[24] << 24) + (response[25] << 16) + (response[26] << 8) + response[27]),
            LastRecordedAddress =
                (uint)((response[28] << 24) + (response[29] << 16) + (response[30] << 8) + response[31])
        };

        if(response.Length < 48)
            return decoded;

        decoded.LogicalTrackNumber += (ushort)(response[32] << 8);

        decoded.SessionNumber += (ushort)(response[33] << 8);

        decoded.ReadCompatibilityLba =
            (uint)((response[36] << 24) + (response[37] << 16) + (response[38] << 8) + response[39]);

        decoded.NextLayerJumpAddress =
            (uint)((response[40] << 24) + (response[41] << 16) + (response[42] << 8) + response[43]);

        decoded.LastLayerJumpAddress =
            (uint)((response[44] << 24) + (response[45] << 16) + (response[46] << 8) + response[47]);

        return decoded;
    }
}