// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : Write.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
//     Writes Basic Lisa Utility 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 © 2011-2023 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
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.Decoders;
using Aaru.Helpers;
using Version = Aaru.CommonTypes.Interop.Version;

namespace Aaru.Images;

[SuppressMessage("ReSharper", "UnusedType.Global")]
public sealed partial class Blu
{
#region IWritableImage Members

    /// <inheritdoc />
    public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
                       uint   sectorSize)
    {
        if(sectorSize != 512)
        {
            ErrorMessage = Localization.Unsupported_sector_size;

            return false;
        }

        if(sectors > 0xFFFFFF)
        {
            ErrorMessage = Localization.Too_many_sectors;

            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
        {
            _writingStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
        }
        catch(IOException e)
        {
            ErrorMessage = string.Format(Localization.Could_not_create_new_image_file_exception_0, e.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)
    {
        int longSectorSize = _imageInfo.MediaType == MediaType.PriamDataTower ? 536 : 532;

        if(!IsWriting)
        {
            ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;

            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(longSectorSize + (long)sectorAddress * longSectorSize, SeekOrigin.Begin);
        _writingStream.Write(data, 0, data.Length);

        ErrorMessage = "";

        return true;
    }

    /// <inheritdoc />
    public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
    {
        int longSectorSize = _imageInfo.MediaType == MediaType.PriamDataTower ? 536 : 532;

        if(!IsWriting)
        {
            ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;

            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(longSectorSize + (long)sectorAddress * longSectorSize, SeekOrigin.Begin);
        _writingStream.Write(data, 0, data.Length);

        ErrorMessage = "";

        return true;
    }

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

            return false;
        }

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

            return false;
        }

        int longSectorSize = _imageInfo.MediaType == MediaType.PriamDataTower ? 536 : 532;

        byte[] oldTag;
        byte[] newTag;

        switch(data.Length - 512)
        {
            // Sony tag, convert to Profile
            case 12 when longSectorSize == 532:
                oldTag = new byte[12];
                Array.Copy(data, 512, oldTag, 0, 12);
                newTag = LisaTag.DecodeSonyTag(oldTag)?.ToProfile().GetBytes();

                break;

            // Sony tag, convert to Priam
            case 12:
                oldTag = new byte[12];
                Array.Copy(data, 512, oldTag, 0, 12);
                newTag = LisaTag.DecodeSonyTag(oldTag)?.ToPriam().GetBytes();

                break;

            // Profile tag, copy to Profile
            case 20 when longSectorSize == 532:
                newTag = new byte[20];
                Array.Copy(data, 512, newTag, 0, 20);

                break;

            // Profile tag, convert to Priam
            case 20:
                oldTag = new byte[20];
                Array.Copy(data, 512, oldTag, 0, 20);
                newTag = LisaTag.DecodeProfileTag(oldTag)?.ToPriam().GetBytes();

                break;

            // Priam tag, convert to Profile
            case 24 when longSectorSize == 532:
                oldTag = new byte[24];
                Array.Copy(data, 512, oldTag, 0, 24);
                newTag = LisaTag.DecodePriamTag(oldTag)?.ToProfile().GetBytes();

                break;

            // Priam tag, copy to Priam
            case 24:
                newTag = new byte[24];
                Array.Copy(data, 512, newTag, 0, 24);

                break;
            case 0:
                newTag = null;

                break;
            default:
                ErrorMessage = Localization.Incorrect_data_size;

                return false;
        }

        newTag ??= new byte[longSectorSize - 512];

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

        ErrorMessage = "";

        return true;
    }

    /// <inheritdoc />
    public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
    {
        if(!IsWriting)
        {
            ErrorMessage = Localization.Tried_to_write_on_a_non_writable_image;

            return false;
        }

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

            return false;
        }

        int  longSectorSize  = _imageInfo.MediaType == MediaType.PriamDataTower ? 536 : 532;
        long givenSectorSize = data.Length / length;

        switch(givenSectorSize)
        {
            case 536:
            case 532:
            case 524:
            case 512:
                break;
            default:
                ErrorMessage = Localization.Incorrect_data_size;

                return false;
        }

        for(uint i = 0; i < length; i++)
        {
            byte[] oldTag;
            byte[] newTag;

            switch(givenSectorSize - 512)
            {
                // Sony tag, convert to Profile
                case 12 when longSectorSize == 532:
                    oldTag = new byte[12];
                    Array.Copy(data, givenSectorSize * i + 512, oldTag, 0, 12);
                    newTag = LisaTag.DecodeSonyTag(oldTag)?.ToProfile().GetBytes();

                    break;

                // Sony tag, convert to Priam
                case 12:
                    oldTag = new byte[12];
                    Array.Copy(data, givenSectorSize * i + 512, oldTag, 0, 12);
                    newTag = LisaTag.DecodeSonyTag(oldTag)?.ToPriam().GetBytes();

                    break;

                // Profile tag, copy to Profile
                case 20 when longSectorSize == 532:
                    newTag = new byte[20];
                    Array.Copy(data, givenSectorSize * i + 512, newTag, 0, 20);

                    break;

                // Profile tag, convert to Priam
                case 20:
                    oldTag = new byte[20];
                    Array.Copy(data, givenSectorSize * i + 512, oldTag, 0, 20);
                    newTag = LisaTag.DecodeProfileTag(oldTag)?.ToPriam().GetBytes();

                    break;

                // Priam tag, convert to Profile
                case 24 when longSectorSize == 532:
                    oldTag = new byte[24];
                    Array.Copy(data, givenSectorSize * i + 512, oldTag, 0, 24);
                    newTag = LisaTag.DecodePriamTag(oldTag)?.ToProfile().GetBytes();

                    break;

                // Priam tag, copy to Priam
                case 24:
                    newTag = new byte[24];
                    Array.Copy(data, givenSectorSize * i + 512, newTag, 0, 24);

                    break;
                case 0:
                    newTag = null;

                    break;
                default:
                    ErrorMessage = Localization.Incorrect_data_size;

                    return false;
            }

            newTag ??= new byte[longSectorSize - 512];

            _writingStream.Seek(longSectorSize + (long)sectorAddress * longSectorSize, SeekOrigin.Begin);
            _writingStream.Write(data,   (int)(givenSectorSize * i), 512);
            _writingStream.Write(newTag, 0,                          newTag.Length);
        }

        ErrorMessage = "";

        return true;
    }

    /// <inheritdoc />
    public bool Close()
    {
        if(!IsWriting)
        {
            ErrorMessage = Localization.Image_is_not_opened_for_writing;

            return false;
        }

        byte[] markerTag = Encoding.UTF8.GetBytes("Aaru " + Version.GetVersion());
        byte[] driveName;
        var    driveType      = new byte[3];
        byte[] driveBlocks    = BigEndianBitConverter.GetBytes((uint)_imageInfo.Sectors);
        int    longSectorSize = _imageInfo.MediaType == MediaType.PriamDataTower ? 536 : 532;
        byte[] blockSize      = BigEndianBitConverter.GetBytes((ushort)longSectorSize);

        switch(_imageInfo.MediaType)
        {
            case MediaType.AppleProfile when _imageInfo.Sectors == 0x4C00:
                driveName = Encoding.ASCII.GetBytes(PROFILE10_NAME);

                break;
            case MediaType.AppleWidget when _imageInfo.Sectors == 0x4C00:
                driveType[1] = 0x01;
                driveName    = Encoding.ASCII.GetBytes(PROFILE10_NAME);

                break;
            case MediaType.PriamDataTower when _imageInfo.Sectors == 0x22C7C:
                driveType[1] = 0xFF;
                driveName    = Encoding.ASCII.GetBytes(PRIAM_NAME);

                break;
            default:
                driveName = Encoding.ASCII.GetBytes(PROFILE_NAME);

                break;
        }

        _writingStream.Seek(0, SeekOrigin.Begin);
        _writingStream.Write(driveName, 0, driveName.Length >= 0xD ? 0xD : driveName.Length);
        _writingStream.Seek(0xD, SeekOrigin.Begin);
        _writingStream.Write(driveType, 0, 3);
        _writingStream.Seek(0x12, SeekOrigin.Begin);
        _writingStream.Write(driveBlocks, 1, 3);
        _writingStream.Seek(0x15, SeekOrigin.Begin);
        _writingStream.Write(blockSize, 1, 2);
        _writingStream.Seek(512, SeekOrigin.Begin);

        _writingStream.Write(markerTag, 0,
                             markerTag.Length >= longSectorSize - 512 ? longSectorSize - 512 : markerTag.Length);

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

        IsWriting    = false;
        ErrorMessage = "";

        return true;
    }

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

    /// <inheritdoc />
    public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack) => true;

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

        return false;
    }

    /// <inheritdoc />
    public bool WriteSectorsTag(byte[] data, ulong sectorAddress, 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
}