// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : Write.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Writes VMware 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 © 2011-2025 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Aaru.CommonTypes;
using Aaru.CommonTypes.AaruMetadata;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Structs;
using Aaru.Logging;

namespace Aaru.Images;

public sealed partial class VMware
{
#region IWritableImage Members

    /// <inheritdoc />
    public bool Create(string path,            MediaType mediaType, Dictionary<string, string> options, ulong sectors,
                       uint   negativeSectors, uint      overflowSectors, uint sectorSize)
    {
        if(options != null)
        {
            if(options.TryGetValue("adapter", out _adapterType))
            {
                switch(_adapterType.ToLowerInvariant())
                {
                    case "ide":
                    case "lsilogic":
                    case "buslogic":
                        _adapterType = _adapterType.ToLowerInvariant();

                        break;
                    case "legacyesx":
                        _adapterType = "legacyESX";

                        break;
                    default:
                        ErrorMessage = string.Format(Localization.Invalid_adapter_type_0, _adapterType);

                        return false;
                }
            }
            else
                _adapterType = "ide";

            if(options.TryGetValue("hwversion", out string tmpValue))
            {
                if(!uint.TryParse(tmpValue, out _hwversion))
                {
                    ErrorMessage = Localization.Invalid_value_for_hwversion_option;

                    return false;
                }
            }
            else
                _hwversion = 4;

            if(options.TryGetValue("split", out tmpValue))
            {
                if(!bool.TryParse(tmpValue, out bool tmpBool))
                {
                    ErrorMessage = Localization.Invalid_value_for_split_option;

                    return false;
                }

                if(tmpBool)
                {
                    ErrorMessage = Localization.Splitted_images_not_yet_implemented;

                    return false;
                }
            }

            if(options.TryGetValue("sparse", out tmpValue))
            {
                if(!bool.TryParse(tmpValue, out bool tmpBool))
                {
                    ErrorMessage = Localization.Invalid_value_for_sparse_option;

                    return false;
                }

                if(tmpBool)
                {
                    ErrorMessage = Localization.Sparse_images_not_yet_implemented;

                    return false;
                }
            }
        }
        else
        {
            _adapterType = "ide";
            _hwversion   = 4;
        }

        if(sectorSize != 512)
        {
            ErrorMessage = Localization.Unsupported_sector_size;

            return false;
        }

        if(negativeSectors != 0)
        {
            ErrorMessage = Localization.Negative_sectors_are_not_supported;

            return false;
        }

        if(overflowSectors != 0)
        {
            ErrorMessage = Localization.Overflow_sectors_are_not_supported;

            return false;
        }

        if(!SupportedMediaTypes.Contains(mediaType))
        {
            ErrorMessage = string.Format(Localization.Unsupported_media_format_0, mediaType);

            return false;
        }

        _imageInfo = new ImageInfo
        {
            MediaType  = mediaType,
            SectorSize = sectorSize,
            Sectors    = sectors
        };

        try
        {
            _writingBaseName = Path.Combine(Path.GetDirectoryName(path) ?? "", Path.GetFileNameWithoutExtension(path));

            _descriptorStream = new StreamWriter(path, false, Encoding.ASCII);

            // TODO: Support split
            _writingStream = new FileStream(_writingBaseName + "-flat.vmdk",
                                            FileMode.CreateNew,
                                            FileAccess.ReadWrite,
                                            FileShare.None);
        }
        catch(IOException ex)
        {
            ErrorMessage = string.Format(Localization.Could_not_create_new_image_file_exception_0, ex.Message);
            AaruLogging.Exception(ex, Localization.Could_not_create_new_image_file_exception_0, ex.Message);

            return false;
        }

        IsWriting    = true;
        ErrorMessage = null;

        return true;
    }

    /// <inheritdoc />
    public bool WriteMediaTag(byte[] data, MediaTagType tag)
    {
        ErrorMessage = Localization.Writing_media_tags_is_not_supported;

        return false;
    }

    /// <inheritdoc />
    public bool WriteSector(byte[] data, ulong sectorAddress, bool negative, SectorStatus sectorStatus)
    {
        if(!IsWriting)
        {
            ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;

            return false;
        }

        if(negative)
        {
            ErrorMessage = Localization.Unsupported_feature;

            return false;
        }

        if(data.Length != 512)
        {
            ErrorMessage = Localization.Incorrect_data_size;

            return false;
        }

        if(sectorAddress >= _imageInfo.Sectors)
        {
            ErrorMessage = Localization.Tried_to_write_past_image_size;

            return false;
        }

        _writingStream.Seek((long)(sectorAddress * 512), SeekOrigin.Begin);
        _writingStream.Write(data, 0, data.Length);

        ErrorMessage = "";

        return true;
    }

    // TODO: Implement sparse and split
    /// <inheritdoc />
    public bool WriteSectors(byte[] data, ulong sectorAddress, bool negative, uint length, SectorStatus[] sectorStatus)
    {
        if(!IsWriting)
        {
            ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;

            return false;
        }

        if(negative)
        {
            ErrorMessage = Localization.Unsupported_feature;

            return false;
        }

        if(data.Length % 512 != 0)
        {
            ErrorMessage = Localization.Incorrect_data_size;

            return false;
        }

        if(sectorAddress + length > _imageInfo.Sectors)
        {
            ErrorMessage = Localization.Tried_to_write_past_image_size;

            return false;
        }

        _writingStream.Seek((long)(sectorAddress * 512), SeekOrigin.Begin);
        _writingStream.Write(data, 0, data.Length);

        ErrorMessage = "";

        return true;
    }

    /// <inheritdoc />
    public bool WriteSectorLong(byte[] data, ulong sectorAddress, bool negative, SectorStatus sectorStatus)
    {
        ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;

        return false;
    }

    /// <inheritdoc />
    public bool WriteSectorsLong(byte[]         data, ulong sectorAddress, bool negative, uint length,
                                 SectorStatus[] sectorStatus)
    {
        ErrorMessage = Localization.Writing_sectors_with_tags_is_not_supported;

        return false;
    }

    // TODO: Implement sparse and split
    /// <inheritdoc />
    public bool Close()
    {
        if(!IsWriting)
        {
            ErrorMessage = Localization.Image_is_not_opened_for_writing;

            return false;
        }

        _writingStream.Flush();
        _writingStream.Close();

        if(_imageInfo.Cylinders == 0)
        {
            _imageInfo.Cylinders       = (uint)(_imageInfo.Sectors / 16 / 63);
            _imageInfo.Heads           = 16;
            _imageInfo.SectorsPerTrack = 63;

            while(_imageInfo.Cylinders == 0)
            {
                _imageInfo.Heads--;

                if(_imageInfo.Heads == 0)
                {
                    _imageInfo.SectorsPerTrack--;
                    _imageInfo.Heads = 16;
                }

                _imageInfo.Cylinders = (uint)(_imageInfo.Sectors / _imageInfo.Heads / _imageInfo.SectorsPerTrack);

                if(_imageInfo.Cylinders == 0 && _imageInfo is { Heads: 0, SectorsPerTrack: 0 }) break;
            }
        }

        _descriptorStream.WriteLine("# Disk DescriptorFile");
        _descriptorStream.WriteLine("version=1");
        _descriptorStream.WriteLine($"CID={new Random().Next(int.MinValue, int.MaxValue):x8}");
        _descriptorStream.WriteLine("parentCID=ffffffff");
        _descriptorStream.WriteLine("createType=\"monolithicFlat\"");
        _descriptorStream.WriteLine();
        _descriptorStream.WriteLine("# Extent description");
        _descriptorStream.WriteLine($"RW {_imageInfo.Sectors} FLAT \"{_writingBaseName + "-flat.vmdk"}\" 0");
        _descriptorStream.WriteLine();
        _descriptorStream.WriteLine("# The Disk Data Base");
        _descriptorStream.WriteLine("#DDB");
        _descriptorStream.WriteLine();
        _descriptorStream.WriteLine($"ddb.virtualHWVersion = \"{_hwversion}\"");
        _descriptorStream.WriteLine($"ddb.geometry.cylinders = \"{_imageInfo.Cylinders}\"");
        _descriptorStream.WriteLine($"ddb.geometry.heads = \"{_imageInfo.Heads}\"");
        _descriptorStream.WriteLine($"ddb.geometry.sectors = \"{_imageInfo.SectorsPerTrack}\"");
        _descriptorStream.WriteLine($"ddb.adapterType = \"{_adapterType}\"");

        _descriptorStream.Flush();
        _descriptorStream.Close();

        IsWriting    = false;
        ErrorMessage = "";

        return true;
    }

    /// <inheritdoc />
    public bool SetImageInfo(ImageInfo imageInfo) => true;

    /// <inheritdoc />
    public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
    {
        if(cylinders > ushort.MaxValue)
        {
            ErrorMessage = Localization.Too_many_cylinders;

            return false;
        }

        if(heads > byte.MaxValue)
        {
            ErrorMessage = Localization.Too_many_heads;

            return false;
        }

        if(sectorsPerTrack > byte.MaxValue)
        {
            ErrorMessage = Localization.Too_many_sectors_per_track;

            return false;
        }

        _imageInfo.SectorsPerTrack = sectorsPerTrack;
        _imageInfo.Heads           = heads;
        _imageInfo.Cylinders       = cylinders;

        return true;
    }

    /// <inheritdoc />
    public bool WriteSectorTag(byte[] data, ulong sectorAddress, bool negative, SectorTagType tag)
    {
        ErrorMessage = Localization.Unsupported_feature;

        return false;
    }

    /// <inheritdoc />
    public bool WriteSectorsTag(byte[] data, ulong sectorAddress, bool negative, uint length, SectorTagType tag)
    {
        ErrorMessage = Localization.Unsupported_feature;

        return false;
    }

    /// <inheritdoc />
    public bool SetDumpHardware(List<DumpHardware> dumpHardware) => false;

    /// <inheritdoc />
    public bool SetMetadata(Metadata metadata) => false;

#endregion
}