// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : CPCDSK.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Component
//
// --[ Description ] ----------------------------------------------------------
//
//     Description
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library 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
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2017 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using DiscImageChef.Checksums;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
using DiscImageChef.Decoders.Floppy;
using DiscImageChef.Filters;

namespace DiscImageChef.ImagePlugins
{
    // Checked using several images and strings inside Apple's DiskImages.framework
    public class CPCDSK : ImagePlugin
    {
        #region Internal constants
        /// <summary>
        /// Identifier for CPCEMU disk images, "MV - CPCEMU Disk-File"
        /// </summary>
        readonly byte[] CPCDSKId = { 0x4D, 0x56, 0x20, 0x2D, 0x20, 0x43, 0x50, 0x43, 0x45, 0x4D, 0x55, 0x20, 0x44, 0x69, 0x73, 0x6B, 0x2D, 0x46, 0x69, 0x6C, 0x65 };
        /// <summary>
        /// Identifier for Extended CPCEMU disk images, "EXTENDED CPC DSK File"
        /// </summary>
        readonly byte[] EDSKId = { 0x45, 0x58, 0x54, 0x45, 0x4E, 0x44, 0x45, 0x44, 0x20, 0x43, 0x50, 0x43, 0x20, 0x44, 0x53, 0x4B, 0x20, 0x46, 0x69, 0x6C, 0x65 };
        /// <summary>
        /// Identifier for track information, "Track-Info\r\n"
        /// </summary>
        readonly byte[] TrackId = { 0x54, 0x72, 0x61, 0x63, 0x6B, 0x2D, 0x49, 0x6E, 0x66, 0x6F };
        #endregion

        #region Internal structures
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        struct CPCDiskInfo
        {
            /// <summary>
            /// Magic number, "MV - CPCEMU Disk-File" in old files, "EXTENDED CPC DSK File" in extended ones
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 21)]
            public byte[] magic;
            /// <summary>
            /// Second part of magic, should be "\r\nDisk-Info\r\n" in all, but some emulators write spaces instead.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 13)]
            public byte[] magic2;
            /// <summary>
            /// Creator application (can be null)
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 14)]
            public byte[] creator;
            /// <summary>
            /// Tracks
            /// </summary>
            public byte tracks;
            /// <summary>
            /// Sides
            /// </summary>
            public byte sides;
            /// <summary>
            /// Size of a track including the 256 bytes header. Unused by extended format, as this format includes a table in the next field
            /// </summary>
            public ushort tracksize;
            /// <summary>
            /// Size of each track in the extended format. 0 indicates track is not formatted and not present in image.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 204)]
            public byte[] tracksizeTable;
        }

        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        struct CPCTrackInfo
        {
            /// <summary>
            /// Magic number, "Track-Info\r\n"
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
            public byte[] magic;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
            public byte[] carriageReturn;
            /// <summary>
            /// Padding
            /// </summary>
            public uint padding;
            /// <summary>
            /// Track number
            /// </summary>
            public byte track;
            /// <summary>
            /// Side number
            /// </summary>
            public byte side;
            /// <summary>
            /// Controller data rate
            /// </summary>
            public byte dataRate;
            /// <summary>
            /// Recording mode
            /// </summary>
            public byte recordingMode;
            /// <summary>
            /// Bytes per sector
            /// </summary>
            public IBMSectorSizeCode bps;
            /// <summary>
            /// How many sectors in this track
            /// </summary>
            public byte sectors;
            /// <summary>
            /// GAP#3
            /// </summary>
            public byte gap3;
            /// <summary>
            /// Filler
            /// </summary>
            public byte filler;
            /// <summary>
            /// Informatino for up to 32 sectors
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
            public CPCSectorInfo[] sectorsInfo;
        }

        /// <summary>
        /// Sector information
        /// </summary>
        [StructLayout(LayoutKind.Sequential, Pack = 1)]
        struct CPCSectorInfo
        {
            /// <summary>
            /// Track number from address mark
            /// </summary>
            public byte track;
            /// <summary>
            /// Side number from address mark
            /// </summary>
            public byte side;
            /// <summary>
            /// Sector ID from address mark
            /// </summary>
            public byte id;
            /// <summary>
            /// Sector size from address mark
            /// </summary>
            public IBMSectorSizeCode size;
            /// <summary>
            /// ST1 register from controller
            /// </summary>
            public byte st1;
            /// <summary>
            /// ST2 register from controller
            /// </summary>
            public byte st2;
            /// <summary>
            /// Length in bytes of this sector size. If it is bigger than expected sector size, it's a weak sector read several times.
            /// </summary>
            public ushort len;
        }
        #endregion

        #region Internal variables
        bool extended;
        Dictionary<ulong, byte[]> sectors;
        Dictionary<ulong, byte[]> addressMarks;
        #endregion

        public CPCDSK()
        {
            Name = "CPCEMU Disk-File and Extended CPC Disk-File";
            PluginUUID = new Guid("724B16CC-ADB9-492E-BA07-CAEEC1012B16");
            ImageInfo = new ImageInfo();
            ImageInfo.readableSectorTags = new List<SectorTagType>();
            ImageInfo.readableMediaTags = new List<MediaTagType>();
            ImageInfo.imageHasPartitions = false;
            ImageInfo.imageHasSessions = false;
            ImageInfo.imageVersion = null;
            ImageInfo.imageApplication = null;
            ImageInfo.imageApplicationVersion = null;
            ImageInfo.imageCreator = null;
            ImageInfo.imageComments = null;
            ImageInfo.mediaManufacturer = null;
            ImageInfo.mediaModel = null;
            ImageInfo.mediaSerialNumber = null;
            ImageInfo.mediaBarcode = null;
            ImageInfo.mediaPartNumber = null;
            ImageInfo.mediaSequence = 0;
            ImageInfo.lastMediaSequence = 0;
            ImageInfo.driveManufacturer = null;
            ImageInfo.driveModel = null;
            ImageInfo.driveSerialNumber = null;
            ImageInfo.driveFirmwareRevision = null;
        }

        public override bool IdentifyImage(Filter imageFilter)
        {
            Stream stream = imageFilter.GetDataForkStream();
            stream.Seek(0, SeekOrigin.Begin);

            if(stream.Length < 512)
                return false;

            byte[] header_b = new byte[256];
            stream.Read(header_b, 0, 256);
            CPCDiskInfo header = new CPCDiskInfo();
            IntPtr headerPtr = Marshal.AllocHGlobal(256);
            Marshal.Copy(header_b, 0, headerPtr, 256);
            header = (CPCDiskInfo)Marshal.PtrToStructure(headerPtr, typeof(CPCDiskInfo));
            Marshal.FreeHGlobal(headerPtr);

            DicConsole.DebugWriteLine("CPCDSK plugin", "header.magic = \"{0}\"", StringHandlers.CToString(header.magic));

            return CPCDSKId.SequenceEqual(header.magic) || EDSKId.SequenceEqual(header.magic);
        }

        public override bool OpenImage(Filter imageFilter)
        {
            Stream stream = imageFilter.GetDataForkStream();
            stream.Seek(0, SeekOrigin.Begin);

            if(stream.Length < 512)
                return false;

            byte[] header_b = new byte[256];
            stream.Read(header_b, 0, 256);
            CPCDiskInfo header = new CPCDiskInfo();
            IntPtr headerPtr = Marshal.AllocHGlobal(256);
            Marshal.Copy(header_b, 0, headerPtr, 256);
            header = (CPCDiskInfo)Marshal.PtrToStructure(headerPtr, typeof(CPCDiskInfo));
            Marshal.FreeHGlobal(headerPtr);

            if(!CPCDSKId.SequenceEqual(header.magic) && !EDSKId.SequenceEqual(header.magic))
                return false;

            extended = EDSKId.SequenceEqual(header.magic);
            DicConsole.DebugWriteLine("CPCDSK plugin", "Extended = {0}", extended);
            DicConsole.DebugWriteLine("CPCDSK plugin", "header.magic = \"{0}\"", StringHandlers.CToString(header.magic));
            DicConsole.DebugWriteLine("CPCDSK plugin", "header.magic2 = \"{0}\"", StringHandlers.CToString(header.magic2));
            DicConsole.DebugWriteLine("CPCDSK plugin", "header.creator = \"{0}\"", StringHandlers.CToString(header.creator));
            DicConsole.DebugWriteLine("CPCDSK plugin", "header.tracks = {0}", header.tracks);
            DicConsole.DebugWriteLine("CPCDSK plugin", "header.sides = {0}", header.sides);
            if(!extended)
                DicConsole.DebugWriteLine("CPCDSK plugin", "header.tracksize = {0}", header.tracksize);
            else
            {
                for(int i = 0; i < header.tracks; i++)
                {
                    for(int j = 0; j < header.sides; j++)
                    {
                        DicConsole.DebugWriteLine("CPCDSK plugin", "Track {0} Side {1} size = {2}", i, j, header.tracksizeTable[i*header.sides + j] * 256);
                    }
                }
            }

            ulong currentSector = 0;
            sectors = new Dictionary<ulong, byte[]>();
            addressMarks = new Dictionary<ulong, byte[]>();
            ulong readtracks = 0;
            bool allTracksSameSize = true;
            ulong sectorsPerTrack = 0;

            // Seek to first track descriptor
            stream.Seek(256, SeekOrigin.Begin);
            for(int i = 0; i < header.tracks; i++)
            {
                for(int j = 0; j < header.sides; j++)
                {
                    // Track not stored in image
                    if(extended && header.tracksizeTable[i * header.sides + j] == 0)
                        continue;

                    long trackPos = stream.Position;

                    byte[] track_b = new byte[256];
                    stream.Read(track_b, 0, 256);
                    CPCTrackInfo trackInfo = new CPCTrackInfo();
                    IntPtr trackPtr = Marshal.AllocHGlobal(256);
                    Marshal.Copy(track_b, 0, trackPtr, 256);
                    trackInfo = (CPCTrackInfo)Marshal.PtrToStructure(trackPtr, typeof(CPCTrackInfo));
                    Marshal.FreeHGlobal(trackPtr);

                    if(!TrackId.SequenceEqual(trackInfo.magic))
                    {
                        DicConsole.ErrorWriteLine("Not the expected track info.");
                        return false;
                    }

                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].magic = \"{0}\"", StringHandlers.CToString(trackInfo.magic), i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].bps = {0}", SizeCodeToBytes(trackInfo.bps), i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].dataRate = {0}", trackInfo.dataRate, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].filler = 0x{0:X2}", trackInfo.filler, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].gap3 = 0x{0:X2}", trackInfo.gap3, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].padding = {0}", trackInfo.padding, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].recordingMode = {0}", trackInfo.recordingMode, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sectors = {0}", trackInfo.sectors, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].side = {0}", trackInfo.side, i, j);
                    DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].track = {0}", trackInfo.track, i, j);

                    if(trackInfo.sectors != sectorsPerTrack)
                    {
                        if(sectorsPerTrack == 0)
                            sectorsPerTrack = trackInfo.sectors;
                        else
                            allTracksSameSize = false;
                    }

                    byte[][] thisTrackSectors = new byte[trackInfo.sectors][];
                    byte[][] thisTrackAddressMarks = new byte[trackInfo.sectors][];

                    for(int k = 1; k <= trackInfo.sectors; k++)
                    {
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].id = 0x{0:X2}", trackInfo.sectorsInfo[k - 1].id, i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].len = {0}", trackInfo.sectorsInfo[k - 1].len, i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].side = {0}", trackInfo.sectorsInfo[k - 1].side, i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].size = {0}", SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size), i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].st1 = 0x{0:X2}", trackInfo.sectorsInfo[k - 1].st1, i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].st2 = 0x{0:X2}", trackInfo.sectorsInfo[k - 1].st2, i, j, k);
                        DicConsole.DebugWriteLine("CPCDSK plugin", "trackInfo[{1}:{2}].sector[{3}].track = {0}", trackInfo.sectorsInfo[k - 1].track, i, j, k);

                        int sectLen;
                        if(extended)
                            sectLen = trackInfo.sectorsInfo[k - 1].len;
                        else
                            sectLen = SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size);

                        byte[] sector = new byte[sectLen];
                        stream.Read(sector, 0, sectLen);

                        if(sectLen < SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size))
                        {
                            byte[] temp = new byte[SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size)];
                            Array.Copy(sector, 0, temp, 0, sector.Length);
                            sector = temp;
                        }
                        else if(sectLen > SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size))
                        {
                            byte[] temp = new byte[SizeCodeToBytes(trackInfo.sectorsInfo[k - 1].size)];
                            Array.Copy(sector, 0, temp, 0, temp.Length);
                            sector = temp;
                        }

                        thisTrackSectors[(trackInfo.sectorsInfo[k - 1].id & 0x3F) - 1] = sector;

                        byte[] amForCrc = new byte[8];
                        amForCrc[0] = 0xA1;
                        amForCrc[1] = 0xA1;
                        amForCrc[2] = 0xA1;
                        amForCrc[3] = (byte)IBMIdType.AddressMark;
                        amForCrc[4] = trackInfo.sectorsInfo[k - 1].track;
                        amForCrc[5] = trackInfo.sectorsInfo[k - 1].side;
                        amForCrc[6] = trackInfo.sectorsInfo[k - 1].id;
                        amForCrc[7] = (byte)trackInfo.sectorsInfo[k - 1].size;
                        byte[] amCrc;

                        CRC16Context.Data(amForCrc, 8, out amCrc);

                        byte[] addressMark = new byte[22];
                        Array.Copy(amForCrc, 0, addressMark, 12, 8);
                        Array.Copy(amCrc, 0, addressMark, 20, 2);

                        thisTrackAddressMarks[(trackInfo.sectorsInfo[k - 1].id & 0x3F) - 1] = addressMark;
                    }

                    for(int s = 0; s < thisTrackSectors.Length; s++)
                    {
                        sectors.Add(currentSector, thisTrackSectors[s]);
                        addressMarks.Add(currentSector, thisTrackAddressMarks[s]);
                        currentSector++;
                        if(thisTrackSectors[s].Length > ImageInfo.sectorSize)
                            ImageInfo.sectorSize = (uint)thisTrackSectors[s].Length;
                    }

                    stream.Seek(trackPos, SeekOrigin.Begin);
                    if(extended)
                    {
                        stream.Seek(header.tracksizeTable[i * header.sides + j] * 256, SeekOrigin.Current);
                        ImageInfo.imageSize += (ulong)(header.tracksizeTable[i * header.sides + j] * 256) - 256;
                    }
                    else
                    {
                        stream.Seek(header.tracksize, SeekOrigin.Current);
                        ImageInfo.imageSize += (ulong)header.tracksize - 256;
                    }

                    readtracks++;
                }
            }

            DicConsole.DebugWriteLine("CPCDSK plugin", "Read {0} sectors", sectors.Count);
            DicConsole.DebugWriteLine("CPCDSK plugin", "Read {0} tracks", readtracks);
            DicConsole.DebugWriteLine("CPCDSK plugin", "All tracks are same size? {0}", allTracksSameSize);

            ImageInfo.imageApplication = StringHandlers.CToString(header.creator);
            ImageInfo.imageCreationTime = imageFilter.GetCreationTime();
            ImageInfo.imageLastModificationTime = imageFilter.GetLastWriteTime();
            ImageInfo.imageName = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
            ImageInfo.sectors = (ulong)sectors.Count;
            ImageInfo.xmlMediaType = XmlMediaType.BlockMedia;
            ImageInfo.mediaType = MediaType.CompactFloppy;
            ImageInfo.readableSectorTags.Add(SectorTagType.FloppyAddressMark);

			// Debug writing full disk as raw
			/*
            FileStream foo = new FileStream(Path.GetFileNameWithoutExtension(imagePath) + ".bin", FileMode.Create);
            for(ulong i = 0; i < (ulong)sectors.Count; i++)
            {
                byte[] foob;
                sectors.TryGetValue(i, out foob);
                foo.Write(foob, 0, foob.Length);
            }
            foo.Close();
            */

			ImageInfo.cylinders = header.tracks;
			ImageInfo.heads = header.sides;
			ImageInfo.sectors = ImageInfo.sectors / (uint)(header.tracks * header.sides);

			return true;
        }

        static int SizeCodeToBytes(IBMSectorSizeCode code)
        {
            switch(code)
            {
                case IBMSectorSizeCode.EighthKilo:
                    return 128;
                case IBMSectorSizeCode.QuarterKilo:
                    return 256;
                case IBMSectorSizeCode.HalfKilo:
                    return 512;
                case IBMSectorSizeCode.Kilo:
                    return 1024;
                case IBMSectorSizeCode.TwiceKilo:
                    return 2048;
                case IBMSectorSizeCode.FriceKilo:
                    return 4096;
                case IBMSectorSizeCode.TwiceFriceKilo:
                    return 8192;
                case IBMSectorSizeCode.FricelyFriceKilo:
                    return 16384;
                default:
                    return 0;
            }
        }

        public override bool ImageHasPartitions()
        {
            return false;
        }

        public override ulong GetImageSize()
        {
            return ImageInfo.imageSize;
        }

        public override ulong GetSectors()
        {
            return ImageInfo.sectors;
        }

        public override uint GetSectorSize()
        {
            return ImageInfo.sectorSize;
        }

        public override string GetImageFormat()
        {
            return extended ? "CPCEMU Extended disk image" : "CPCEMU disk image";
        }

        public override string GetImageVersion()
        {
            return ImageInfo.imageVersion;
        }

        public override string GetImageApplication()
        {
            return ImageInfo.imageApplication;
        }

        public override string GetImageApplicationVersion()
        {
            return ImageInfo.imageApplicationVersion;
        }

        public override string GetImageCreator()
        {
            return ImageInfo.imageCreator;
        }

        public override DateTime GetImageCreationTime()
        {
            return ImageInfo.imageCreationTime;
        }

        public override DateTime GetImageLastModificationTime()
        {
            return ImageInfo.imageLastModificationTime;
        }

        public override string GetImageName()
        {
            return ImageInfo.imageName;
        }

        public override string GetImageComments()
        {
            return ImageInfo.imageComments;
        }

        public override MediaType GetMediaType()
        {
            return ImageInfo.mediaType;
        }

        public override byte[] ReadSector(ulong sectorAddress)
        {
            byte[] sector;
            if(sectors.TryGetValue(sectorAddress, out sector))
                return sector;
            
            throw new ArgumentOutOfRangeException(nameof(sectorAddress), string.Format("Sector address {0} not found", sectorAddress));
        }

        public override byte[] ReadSectors(ulong sectorAddress, uint length)
        {
            if(sectorAddress > ImageInfo.sectors - 1)
                throw new ArgumentOutOfRangeException(nameof(sectorAddress), string.Format("Sector address {0} not found", sectorAddress));

            if(sectorAddress + length > ImageInfo.sectors)
                throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");

            MemoryStream ms = new MemoryStream();

            for(uint i = 0; i < length; i++)
            {
                byte[] sector = ReadSector(sectorAddress + i);
                ms.Write(sector, 0, sector.Length);
            }

            return ms.ToArray();
        }

        public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
        {
            if(tag != SectorTagType.FloppyAddressMark)
                throw new FeatureUnsupportedImageException(string.Format("Tag {0} not supported by image format", tag));

            byte[] addressMark;
            if(addressMarks.TryGetValue(sectorAddress, out addressMark))
                return addressMark;

            throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
        }

        public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
        {
            if(tag != SectorTagType.FloppyAddressMark)
                throw new FeatureUnsupportedImageException(string.Format("Tag {0} not supported by image format", tag));

            if(sectorAddress > ImageInfo.sectors - 1)
                throw new ArgumentOutOfRangeException(nameof(sectorAddress), string.Format("Sector address {0} not found", sectorAddress));

            if(sectorAddress + length > ImageInfo.sectors)
                throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");

            MemoryStream ms = new MemoryStream();

            for(uint i = 0; i < length; i++)
            {
                byte[] adddressMark = ReadSector(sectorAddress + i);
                ms.Write(adddressMark, 0, adddressMark.Length);
            }

            return ms.ToArray();
        }

        #region Unsupported features

        public override byte[] ReadDiskTag(MediaTagType tag)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSector(ulong sectorAddress, uint track)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorLong(ulong sectorAddress)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorLong(ulong sectorAddress, uint track)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorsLong(ulong sectorAddress, uint length)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override string GetMediaManufacturer()
        {
            return null;
        }

        public override string GetMediaModel()
        {
            return null;
        }

        public override string GetMediaSerialNumber()
        {
            return null;
        }

        public override string GetMediaBarcode()
        {
            return null;
        }

        public override string GetMediaPartNumber()
        {
            return null;
        }

        public override int GetMediaSequence()
        {
            return 0;
        }

        public override int GetLastDiskSequence()
        {
            return 0;
        }

        public override string GetDriveManufacturer()
        {
            return null;
        }

        public override string GetDriveModel()
        {
            return null;
        }

        public override string GetDriveSerialNumber()
        {
            return null;
        }

        public override List<Partition> GetPartitions()
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override List<Track> GetTracks()
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override List<Track> GetSessionTracks(Session session)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override List<Track> GetSessionTracks(ushort session)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override List<Session> GetSessions()
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override bool? VerifySector(ulong sectorAddress)
        {
            return null;
        }

        public override bool? VerifySector(ulong sectorAddress, uint track)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> FailingLBAs, out List<ulong> UnknownLBAs)
        {
            FailingLBAs = new List<ulong>();
            UnknownLBAs = new List<ulong>();
            for(ulong i = 0; i < ImageInfo.sectors; i++)
                UnknownLBAs.Add(i);
            return null;
        }

        public override bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> FailingLBAs, out List<ulong> UnknownLBAs)
        {
            throw new FeatureUnsupportedImageException("Feature not supported by image format");
        }

        public override bool? VerifyMediaImage()
        {
            return null;
        }

        #endregion
    }
}

