// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : PartClone.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Manages partclone disk images.
//
// --[ 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 © 2011-2026 Natalia Portillo
// ****************************************************************************/

using System.Collections.Generic;
using System.IO;
using Aaru.CommonTypes.Extents;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;

namespace Aaru.Images;

/// <inheritdoc cref="Aaru.CommonTypes.Interfaces.IMediaImage" />
/// <summary>Implements reading partclone disk images</summary>
public sealed partial class PartClone : IMediaImage, IVerifiableImage
{
    const string MODULE_NAME = "PartClone plugin";

    // The used block "bitmap" uses one byte per block
    // TODO: Convert on-image bytemap to on-memory bitmap
    byte[] _byteMap;
    /// <summary>Detected stride of the per-block CRC trailer (4 for normal images, 8 for x64-bug ones).</summary>
    int _crcSize;
    long                     _dataOff;
    ExtentsULong             _extents;
    Dictionary<ulong, ulong> _extentsOff;
    ImageInfo                _imageInfo;
    Stream                   _imageStream;

    /// <summary>Image format version detected at <see cref="Open" /> time (1 or 2).</summary>
    int _imageVersion;
    Header                    _pHdr;
    Dictionary<ulong, byte[]> _sectorCache;
    byte                      _v2BitmapMode;
    uint                      _v2BlockSize;
    uint                      _v2BlocksPerChecksum;
    ushort                    _v2ChecksumMode;
    ushort                    _v2ChecksumSize;
    ulong                     _v2DeviceSize;
    bool                      _v2ReseedChecksum;

    // v0002-only state
    ulong _v2TotalBlocks;
    ulong _v2UsedBlocks;

    public PartClone() => _imageInfo = new ImageInfo
    {
        ReadableSectorTags    = [],
        ReadableMediaTags     = [],
        HasPartitions         = false,
        HasSessions           = false,
        Application           = "PartClone",
        ApplicationVersion    = null,
        Creator               = null,
        Comments              = null,
        MediaManufacturer     = null,
        MediaModel            = null,
        MediaSerialNumber     = null,
        MediaBarcode          = null,
        MediaPartNumber       = null,
        MediaSequence         = 0,
        LastMediaSequence     = 0,
        DriveManufacturer     = null,
        DriveModel            = null,
        DriveSerialNumber     = null,
        DriveFirmwareRevision = null
    };
}