/*
 *                     GNU AFFERO GENERAL PUBLIC LICENSE
 *                       Version 3, 19 November 2007
 *  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 *  Everyone is permitted to copy and distribute verbatim copies
 *  of this license document, but changing it is not allowed.
 */

using BinarySerialization;
using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Util;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;
using UVtools.Core.EmguCV;
using UVtools.Core.Extensions;
using UVtools.Core.Layers;
using UVtools.Core.Operations;

namespace UVtools.Core.FileFormats;

[XmlRoot(ElementName = "svg", Namespace = "http://www.w3.org/2000/svg")]

public class FlashForgeSVGXSvg
{
    //public string Xmlns { get; set; } = "http://www.w3.org/2000/svg";

    //[XmlAttribute("svg", Namespace = "http://www.w3.org/2000/svg")] public string Svg { get; set; } = "http://www.w3.org/2000/svg";
    [XmlAttribute("version")] public string Version { get; set; } = "1.1";

    [XmlElement("printparams")] public FlashForgeSVGXSvgPrintParams PrintParameters { get; set; } = new();

    [XmlElement("g")] public List<FlashForgeSVGXSvgGroup> Groups { get; set; } = new();

    public override string ToString()
    {
        return $"{nameof(Version)}: {Version}, {nameof(PrintParameters)}: {PrintParameters}, {nameof(Groups)}: {Groups.Count}";
    }

    public string SerializeToString()
    {
        var settings = new XmlWriterSettings
        {
            // If set to true XmlWriter would close MemoryStream automatically and using would then do double dispose
            // Code analysis does not understand that. That's why there is a suppress message.
            CloseOutput = false,
            Encoding = new UTF8Encoding(false),
            Indent = true,
            NewLineChars = "\n"
        };

        var svg = XmlExtensions.SerializeObject(this, settings);
        return svg.Replace("  ", string.Empty)
                   .Replace("<g id=\"background\" area=\"0\" perimeter=\"0\" />", "<g id=\"background\">\n</g>")
               + '\n';
    }
}

[XmlRoot("printparams")]
public class FlashForgeSVGXSvgPrintParams
{
    [XmlAttribute("machinename")] public string MachineName { get; set; } = "Unknown";
    [XmlAttribute("materialname")] public string? MaterialName { get; set; } = "Unknown";
    [XmlAttribute("layerheight")] public float LayerHeight { get; set; }
    [XmlAttribute("volume")] public float MaterialMilliliters { get; set; }
    [XmlAttribute("layercount")] public uint LayerCount { get; set; }
    [XmlAttribute("lightintensity")] public float LightIntensity { get; set; } = 1;
    [XmlAttribute("resolutionx")] public uint ResolutionX { get; set; }
    [XmlAttribute("resolutiony")] public uint ResolutionY { get; set; }
    [XmlAttribute("displaywidth")] public float DisplayWidth { get; set; }
    [XmlAttribute("displayheight")] public float DisplayHeight { get; set; }
    [XmlAttribute("machinez")] public float MachineZ { get; set; }

    [XmlElement("projectiontime")] public FlashForgeSVGXSvgProjectionTime ProjectionTime { get; set; } = new();
    [XmlElement("projectionadjust")] public FlashForgeSVGXSvgProjectionAdjust ProjectionAdjust { get; set; } = new();
    [XmlElement("printrange")] public FlashForgeSVGXSvgPrintRange PrintRange { get; set; } = new();

    public override string ToString()
    {
        return $"{nameof(MaterialName)}: {MaterialName}, {nameof(LayerHeight)}: {LayerHeight}, {nameof(MaterialMilliliters)}: {MaterialMilliliters}, {nameof(LayerCount)}: {LayerCount}, {nameof(LightIntensity)}: {LightIntensity}, {nameof(ResolutionX)}: {ResolutionX}, {nameof(ResolutionY)}: {ResolutionY}, {nameof(DisplayWidth)}: {DisplayWidth}, {nameof(DisplayHeight)}: {DisplayHeight}, {nameof(MachineZ)}: {MachineZ}, {nameof(ProjectionTime)}: {ProjectionTime}, {nameof(ProjectionAdjust)}: {ProjectionAdjust}, {nameof(PrintRange)}: {PrintRange}";
    }
}

[XmlRoot("projectiontime")]
public class FlashForgeSVGXSvgProjectionTime
{
    [XmlAttribute("attachlayer")] public ushort BottomLayerCount { get; set; } = 3;
    [XmlAttribute("buildinlayer")] public ushort TransitionLayerCount { get; set; } = 5; 
    [XmlAttribute("attachtime")] public float BottomExposureTime { get; set; }
    [XmlAttribute("basetime")] public float ExposureTime { get; set; }

    public override string ToString()
    {
        return $"{nameof(BottomLayerCount)}: {BottomLayerCount}, {nameof(TransitionLayerCount)}: {TransitionLayerCount}, {nameof(BottomExposureTime)}: {BottomExposureTime}, {nameof(ExposureTime)}: {ExposureTime}";
    }
}

[XmlRoot("projectionadjust")]
public class FlashForgeSVGXSvgProjectionAdjust
{
    [XmlAttribute("x")] public float X { get; set; } = 100;
    [XmlAttribute("y")] public float Y { get; set; } = 100;

    public override string ToString()
    {
        return $"{nameof(X)}: {X}, {nameof(Y)}: {Y}";
    }
}

[XmlRoot("printrange")]
public class FlashForgeSVGXSvgPrintRange
{
    [XmlAttribute("minx")] public float MinX { get; set; }
    [XmlAttribute("miny")] public float MinY { get; set; }
    [XmlAttribute("minz")] public float MinZ { get; set; }
    [XmlAttribute("maxx")] public float MaxX { get; set; }
    [XmlAttribute("maxy")] public float MaxY { get; set; }
    [XmlAttribute("maxz")] public float MaxZ { get; set; }

    public override string ToString()
    {
        return $"{nameof(MinX)}: {MinX}, {nameof(MinY)}: {MinY}, {nameof(MinZ)}: {MinZ}, {nameof(MaxX)}: {MaxX}, {nameof(MaxY)}: {MaxY}, {nameof(MaxZ)}: {MaxZ}";
    }
}

[XmlRoot("g")]
public class FlashForgeSVGXSvgGroup
{
    [XmlAttribute("id")] public string Id { get; set; } = string.Empty;
    [XmlAttribute("area")] public float Area { get; set; }
    [XmlAttribute("perimeter")] public float Perimeter { get; set; }
    [XmlElement("path")] public List<FlashForgeSVGXSvgPath> Paths { get; set; } = new();

    public FlashForgeSVGXSvgGroup() { }

    public FlashForgeSVGXSvgGroup(string id, float area = 0, float perimeter = 0)
    {
        Id = id;
        Area = area;
        Perimeter = perimeter;
    }

    public override string ToString()
    {
        return $"{nameof(Id)}: {Id}, {nameof(Area)}: {Area}, {nameof(Perimeter)}: {Perimeter}, {nameof(Paths)}: {Paths}";
    }
}

[XmlRoot("path")]
public class FlashForgeSVGXSvgPath
{
    [XmlAttribute("d")] public string Value { get; set; } = string.Empty;
    [XmlAttribute("style")] public string Style { get; set; } = "fill:white";
    [XmlAttribute("fill-rule")] public string FillRule { get; set; } = "evenodd";

    public FlashForgeSVGXSvgPath() { }

    public FlashForgeSVGXSvgPath(string value)
    {
        Value = value;
    }

    public override string ToString()
    {
        return $"{nameof(Value)}: {Value}, {nameof(Style)}: {Style}, {nameof(FillRule)}: {FillRule}";
    }
}


public sealed class FlashForgeSVGXFile : FileFormat
{
    #region Constants
    #endregion

    #region Sub Classes
    #region Header
    public class Header
    {
        public const byte IdentifierLength = 16;
        public const string IdentifierText = "DLP-II 1.1\n";
            
        [FieldOrder(0)] [FieldLength(IdentifierLength)] [SerializeAs(SerializedType.TerminatedString)] public string Identifier { get; set; } = IdentifierText;
        [FieldOrder(1)] public uint Preview1Address { get; set; }
        [FieldOrder(2)] public uint Preview2Address { get; set; }
        [FieldOrder(3)] public uint SVGDocumentAddress { get; set; }

        public override string ToString()
        {
            return $"{nameof(Identifier)}: {Identifier}, {nameof(Preview1Address)}: {Preview1Address}, {nameof(Preview2Address)}: {Preview2Address}, {nameof(SVGDocumentAddress)}: {SVGDocumentAddress}";
        }
    }
    #endregion

    #region Preview
    /// <summary>
    /// The files contain two preview images.
    /// These are shown on the printer display when choosing which file to print, sparing the poor printer from needing to render a 3D image from scratch.
    /// </summary>
    public class Preview
    {
        public const byte IdentifierLength = 2;
        public const string IdentifierText = "BM";

        /// <summary>
        /// Gets or sets the identifier, BM = bitmap?
        /// </summary>
        [FieldOrder(0)] [FieldLength(IdentifierLength)] public string Identifier { get; set; } = IdentifierText; 
            
        /// <summary>
        /// Gets or sets the table total size
        /// </summary>
        [FieldOrder(1)] public uint TableSize { get; set; }
        [FieldOrder(2)] public uint Padding1 { get; set; }
        [FieldOrder(3)] public uint DpiX { get; set; } = 54;
        [FieldOrder(4)] public uint DpiY { get; set; } = 40;

        [FieldOrder(5)] public uint ResolutionX { get; set; }

        /// <summary>
        /// Gets the Y dimension of the preview image, in pixels. 
        /// </summary>
        [FieldOrder(6)] public uint ResolutionY { get; set; }

        [FieldOrder(7)] public uint Unknown1 { get; set; } = 0x180001;
        [FieldOrder(8)] public uint Padding2 { get; set; }
        [FieldOrder(9)] public uint DataSize { get; set; }
        [FieldOrder(10)] public uint Unknown2 { get; set; } = 3780;
        [FieldOrder(11)] public uint Unknown3 { get; set; } = 3780;
        [FieldOrder(12)] public uint Padding3 { get; set; }
        [FieldOrder(13)] public uint Padding4 { get; set; }

        [FieldOrder(14)] [FieldLength(nameof(DataSize))] public byte[] BGR { get; set; } = null!;

        public override string ToString()
        {
            return $"{nameof(Identifier)}: {Identifier}, {nameof(TableSize)}: {TableSize}, {nameof(Padding1)}: {Padding1}, {nameof(DpiX)}: {DpiX}, {nameof(DpiY)}: {DpiY}, {nameof(ResolutionX)}: {ResolutionX}, {nameof(ResolutionY)}: {ResolutionY}, {nameof(Unknown1)}: {Unknown1}, {nameof(Padding2)}: {Padding2}, {nameof(DataSize)}: {DataSize}, {nameof(Unknown2)}: {Unknown2}, {nameof(Unknown3)}: {Unknown3}, {nameof(Padding3)}: {Padding3}, {nameof(Padding4)}: {Padding4}, {nameof(BGR)}: {BGR.Length}";
        }
    }

    #endregion

    #endregion

    #region Properties

    public Header HeaderSettings { get; private set; } = new();

    public FlashForgeSVGXSvg SVGDocument { get; private set; } = new();

    public override FileFormatType FileType => FileFormatType.Binary;

    public override FileExtension[] FileExtensions { get; } = {
        new (typeof(FlashForgeSVGXFile), "svgx", "Flashforge SVGX"),
    };

    public override PrintParameterModifier[]? PrintParameterModifiers { get; } =
    {
        PrintParameterModifier.BottomLayerCount,
        PrintParameterModifier.BottomExposureTime,
        PrintParameterModifier.ExposureTime,
        //PrintParameterModifier.LightPWM,
    };

    public override Size[]? ThumbnailsOriginalSize { get; } =
    {
        new(128, 128), 
        new(200, 240)
    };

    public override uint ResolutionX
    {
        get => SVGDocument.PrintParameters.ResolutionX;
        set => base.ResolutionX = SVGDocument.PrintParameters.ResolutionX = value;
    }

    public override uint ResolutionY
    {
        get => SVGDocument.PrintParameters.ResolutionY;
        set => base.ResolutionY = SVGDocument.PrintParameters.ResolutionY = value;
    }

    public override float DisplayWidth
    {
        get => SVGDocument.PrintParameters.DisplayWidth;
        set => base.DisplayWidth = SVGDocument.PrintParameters.DisplayWidth = RoundDisplaySize(value);
    }


    public override float DisplayHeight
    {
        get => SVGDocument.PrintParameters.DisplayHeight;
        set => base.DisplayHeight = SVGDocument.PrintParameters.DisplayHeight = RoundDisplaySize(value);
    }
        
    public override FlipDirection DisplayMirror
    {
        get => FlipDirection.Vertically;
        set {}
    }

    public override float MachineZ 
    {
        get => SVGDocument.PrintParameters.MachineZ > 0 ? SVGDocument.PrintParameters.MachineZ : base.MachineZ;
        set => base.MachineZ = SVGDocument.PrintParameters.MachineZ = (float)Math.Round(value, 2);
    }

    public override float LayerHeight
    {
        get => SVGDocument.PrintParameters.LayerHeight;
        set
        {
            SVGDocument.PrintParameters.LayerHeight = Layer.RoundHeight(value);
            RaisePropertyChanged();
        }
    }

    public override float PrintHeight
    {
        get => base.PrintHeight;
        set => base.PrintHeight = SVGDocument.PrintParameters.PrintRange.MaxZ = base.PrintHeight;
    }

    public override uint LayerCount
    {
        get => base.LayerCount;
        set => SVGDocument.PrintParameters.LayerCount = base.LayerCount;
    }

    public override ushort BottomLayerCount
    {
        get => SVGDocument.PrintParameters.ProjectionTime.BottomLayerCount;
        set => base.BottomLayerCount = SVGDocument.PrintParameters.ProjectionTime.BottomLayerCount = value;
    }

    public override float BottomExposureTime
    {
        get => SVGDocument.PrintParameters.ProjectionTime.BottomExposureTime;
        set => base.BottomExposureTime = SVGDocument.PrintParameters.ProjectionTime.BottomExposureTime = (float)Math.Round(value, 2);
    }


    public override float ExposureTime
    {
        get => SVGDocument.PrintParameters.ProjectionTime.ExposureTime;
        set => base.ExposureTime = SVGDocument.PrintParameters.ProjectionTime.ExposureTime = (float)Math.Round(value, 2);
    }

    /*public override float BottomLiftHeight
    {
        get => HeaderSettings.BottomLiftHeight;
        set => base.BottomLiftHeight = HeaderSettings.BottomLiftHeight = (float)Math.Round(value, 2);
    }

    public override float LiftHeight
    {
        get => HeaderSettings.LiftHeight;
        set => base.LiftHeight = HeaderSettings.LiftHeight = (float)Math.Round(value, 2);
    }

    public override float BottomLiftSpeed
    {
        get => HeaderSettings.BottomLiftSpeed;
        set => base.BottomLiftSpeed = HeaderSettings.BottomLiftSpeed = (float)Math.Round(value, 2);
    }

    public override float LiftSpeed
    {
        get => HeaderSettings.LiftSpeed;
        set => base.LiftSpeed = HeaderSettings.LiftSpeed = (float)Math.Round(value, 2);
    }

    public override float BottomRetractSpeed => RetractSpeed;

    public override float RetractSpeed
    {
        get => HeaderSettings.RetractSpeed;
        set => base.RetractSpeed = HeaderSettings.RetractSpeed = (float)Math.Round(value, 2);
    }

    public override byte BottomLightPWM
    {
        get => (byte) HeaderSettings.BottomLightPWM;
        set => base.BottomLightPWM = (byte) (HeaderSettings.BottomLightPWM = value);
    }

    public override byte LightPWM
    {
        get => (byte) HeaderSettings.LightPWM;
        set => base.LightPWM = (byte) (HeaderSettings.LightPWM = value);
    }*/

    public override float MaterialMilliliters 
    {
        get => SVGDocument.PrintParameters.MaterialMilliliters;
        set
        {
            base.MaterialMilliliters = value;
            SVGDocument.PrintParameters.MaterialMilliliters = base.MaterialMilliliters;
        }
    }

    public override string? MaterialName
    {
        get => SVGDocument.PrintParameters.MaterialName;
        set => base.MaterialName = SVGDocument.PrintParameters.MaterialName = value;
    }

    public override string MachineName
    {
        get => SVGDocument.PrintParameters.MachineName;
        set => base.MachineName = SVGDocument.PrintParameters.MachineName = value;
    }

    public override object[] Configs => new object[] { HeaderSettings, SVGDocument.PrintParameters, SVGDocument.PrintParameters.ProjectionAdjust, SVGDocument.PrintParameters.PrintRange, SVGDocument.PrintParameters.ProjectionTime  };

    #endregion

    #region Constructors
    public FlashForgeSVGXFile()
    {
    }
    #endregion

    #region Methods
    protected override void EncodeInternally(OperationProgress progress)
    {
        if (SVGDocument.PrintParameters.ResolutionX == 0 || SVGDocument.PrintParameters.ResolutionY == 0 ||
            SVGDocument.PrintParameters.DisplayWidth == 0 || SVGDocument.PrintParameters.DisplayHeight == 0)
        {
            throw new FileLoadException("This file does not contain a resolution and/or display size information needed to generate the layer images.\n" +
                                        "Note that FlashDLPrint slicer is unable to output files with the required information to load in here.\n" +
                                        "Please use other compatible slicer capable of output the correct information to load the file in here.", FileFullPath);
        }

        using var outputFile = new FileStream(TemporaryOutputFileFullPath, FileMode.Create, FileAccess.Write);
        outputFile.Seek(Helpers.Serializer.SizeOf(HeaderSettings), SeekOrigin.Begin);

        HeaderSettings.Preview1Address = 0;
        HeaderSettings.Preview2Address = 0;

        progress.Reset(OperationProgress.StatusEncodePreviews, (uint)ThumbnailsOriginalSize?.Length!);
        foreach (var mat in Thumbnails)
        {
            if (HeaderSettings.Preview2Address > 0) break;
            if(mat is null) continue;

            var preview = new Preview
            {
                ResolutionX = (uint)mat.Width,
                ResolutionY = (uint)mat.Height
            };

            using var matFlip = new Mat();
            CvInvoke.Flip(mat, matFlip, FlipType.Vertical);

            var bytes = EncodeImage(DATATYPE_BGR888, matFlip);
            preview.BGR = bytes;
            preview.DataSize = (uint)bytes.Length;
            preview.TableSize = (uint)Helpers.Serializer.SizeOf(preview);

            if (HeaderSettings.Preview1Address == 0)
            {
                HeaderSettings.Preview1Address = (uint)outputFile.Position;
            }
            else
            {
                HeaderSettings.Preview2Address = (uint)outputFile.Position;
            }

            outputFile.WriteSerialize(preview);
            progress++;
        }

        var halfDisplay = Display.Half();
        var ppmm = Ppmm;
        var pixelUm = PixelSizeMicronsMax;

        progress.Reset(OperationProgress.StatusEncodeLayers, LayerCount);
        SVGDocument.Groups = new List<FlashForgeSVGXSvgGroup> { new("background") };
        var groups = new FlashForgeSVGXSvgGroup[LayerCount];

        Parallel.For(0, LayerCount, CoreSettings.GetParallelOptions(progress), layerIndex =>
        {
            progress.PauseIfRequested();
            groups[layerIndex] = new FlashForgeSVGXSvgGroup($"layer-{layerIndex}");

            using var mat = this[layerIndex].LayerMat;
            //CvInvoke.Threshold(mat, mat, 127, 255, ThresholdType.Binary); // no AA

            using var contours = mat.FindContours(out var hierarchy, RetrType.Tree);

            float minx = SVGDocument.PrintParameters.PrintRange.MinX;
            float miny = SVGDocument.PrintParameters.PrintRange.MinY;
            float maxx = SVGDocument.PrintParameters.PrintRange.MaxX;
            float maxy = SVGDocument.PrintParameters.PrintRange.MaxY;

            var path = new StringBuilder();
            for (int i = 0; i < contours.Size; i++)
            {
                if (hierarchy[i, EmguContour.HierarchyParent] == -1) // Top hierarchy
                {
                    if (path.Length > 0)
                    {
                        groups[layerIndex].Paths.Add(new FlashForgeSVGXSvgPath(path.ToString()));
                    }
                    path.Clear();

                    groups[layerIndex].Area = (float)Math.Round(Math.Cbrt(CvInvoke.ContourArea(contours[i]) / pixelUm), 3);
                    groups[layerIndex].Perimeter = (float)Math.Round(CvInvoke.ArcLength(contours[i], true) / pixelUm, 3);
                }
                else
                {
                    path.Append(' ');
                }

                var mmX = (float)Math.Round(contours[i][0].X / ppmm.Width - halfDisplay.Width, 3);
                var mmY = (float)Math.Round(contours[i][0].Y / ppmm.Height - halfDisplay.Height, 3);

                minx = Math.Min(minx, mmX);
                miny = Math.Min(miny, mmY);
                maxx = Math.Max(maxx, mmX);
                maxy = Math.Max(maxy, mmY);

                path.Append($"M {mmX} {mmY} L");
                for (int x = 1; x < contours[i].Size; x++)
                {
                    mmX = (float)Math.Round(contours[i][x].X / ppmm.Width - halfDisplay.Width, 3);
                    mmY = (float)Math.Round(contours[i][x].Y / ppmm.Height - halfDisplay.Height, 3);
                    path.Append($" {mmX} {mmY}");

                    minx = Math.Min(minx, mmX);
                    miny = Math.Min(miny, mmY);
                    maxx = Math.Max(maxx, mmX);
                    maxy = Math.Max(maxy, mmY);
                }
                path.Append(" Z");
            }

            if (path.Length > 0) // Left over
            {
                groups[layerIndex].Paths.Add(new FlashForgeSVGXSvgPath(path.ToString()));
            }

            lock (progress.Mutex)
            {
                SVGDocument.PrintParameters.PrintRange.MinX = Math.Min(SVGDocument.PrintParameters.PrintRange.MinX, minx);
                SVGDocument.PrintParameters.PrintRange.MinY = Math.Min(SVGDocument.PrintParameters.PrintRange.MinY, miny);
                SVGDocument.PrintParameters.PrintRange.MaxX = Math.Max(SVGDocument.PrintParameters.PrintRange.MaxX, maxx);
                SVGDocument.PrintParameters.PrintRange.MaxY = Math.Max(SVGDocument.PrintParameters.PrintRange.MaxY, maxy);
                progress++;
            }
        });

        SVGDocument.Groups.AddRange(groups);

        HeaderSettings.SVGDocumentAddress = (uint)outputFile.Position;

        outputFile.WriteString(SVGDocument.SerializeToString());

        outputFile.Seek(0, SeekOrigin.Begin);
        outputFile.WriteSerialize(HeaderSettings);
            
        Debug.WriteLine("Encode Results:");
        Debug.WriteLine(HeaderSettings);
        Debug.WriteLine(SVGDocument);
        Debug.WriteLine("-End-");
    }

    protected override void DecodeInternally(OperationProgress progress)
    {
        using var inputFile = new FileStream(FileFullPath!, FileMode.Open, FileAccess.Read);
        HeaderSettings = Helpers.Deserialize<Header>(inputFile);
        if (HeaderSettings.Identifier != Header.IdentifierText)
        {
            throw new FileLoadException("Not a valid Flashforge SVGX file!", FileFullPath);
        }

        progress.Reset(OperationProgress.StatusDecodePreviews, ThumbnailsCount);
        Debug.Write("Header -> ");
        Debug.WriteLine(HeaderSettings);

        byte thumbnailCount = 0;
        if (HeaderSettings.Preview1Address > 0)
        {
            inputFile.Seek(HeaderSettings.Preview1Address, SeekOrigin.Begin);
            var preview = Helpers.Deserialize<Preview>(inputFile);
            Thumbnails[thumbnailCount] = DecodeImage(DATATYPE_BGR888, preview.BGR, preview.ResolutionX, preview.ResolutionY);
            CvInvoke.Flip(Thumbnails[thumbnailCount], Thumbnails[thumbnailCount], FlipType.Vertical);
            Debug.Write($"Preview[{thumbnailCount}] -> ");
            Debug.WriteLine(preview);
            thumbnailCount++;

        }
        progress++;
        if (HeaderSettings.Preview2Address > 0)
        {
            inputFile.Seek(HeaderSettings.Preview2Address, SeekOrigin.Begin);
            var preview = Helpers.Deserialize<Preview>(inputFile);
            Thumbnails[thumbnailCount] = DecodeImage(DATATYPE_BGR888, preview.BGR, preview.ResolutionX, preview.ResolutionY);
            CvInvoke.Flip(Thumbnails[thumbnailCount], Thumbnails[thumbnailCount], FlipType.Vertical);
            Debug.Write($"Preview[{thumbnailCount}] -> ");
            Debug.WriteLine(preview);
            thumbnailCount++;

        }
        progress++;

        inputFile.Seek(HeaderSettings.SVGDocumentAddress, SeekOrigin.Begin);
        string svgDocument = Encoding.UTF8.GetString(inputFile.ReadToEnd());
        SVGDocument = XmlExtensions.DeserializeFromText<FlashForgeSVGXSvg>(svgDocument);

        Debug.WriteLine(SVGDocument);

        if (SVGDocument.PrintParameters.ResolutionX == 0 || SVGDocument.PrintParameters.ResolutionY == 0 ||
            SVGDocument.PrintParameters.DisplayWidth == 0 || SVGDocument.PrintParameters.DisplayHeight == 0)
        {
            throw new FileLoadException("This file does not contain a resolution and/or display size information needed to generate the layer images.\n" +
                                        "Note that FlashDLPrint slicer is unable to output files with the required information to load in here.\n" +
                                        "Please use other compatible slicer capable of output the correct information to load the file in here.", FileFullPath);
        }

        var halfDisplay = Display.Half();
        var ppmm = Ppmm;

        Init(SVGDocument.PrintParameters.LayerCount, DecodeType == FileDecodeType.Partial);

        if (DecodeType != FileDecodeType.Full) return;
        progress.Reset(OperationProgress.StatusDecodeLayers, LayerCount);
        Parallel.For(0, LayerCount, CoreSettings.GetParallelOptions(progress), layerIndex =>
        {
            progress.PauseIfRequested();
            var mat = EmguExtensions.InitMat(Resolution);

            var group = SVGDocument.Groups.FirstOrDefault(g => g.Id == $"layer-{layerIndex}");

            if (@group is not null)
            {
                var pointsOfPoints = new List<Point[]>();
                var points = new List<Point>();
                foreach (var path in @group.Paths)
                {
                    progress.PauseOrCancelIfRequested();
                    var spaceSplit = path.Value.Split(' ',
                        StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);

                    for (int i = 0; i < spaceSplit.Length; i++)
                    {
                        if (spaceSplit[i] == "M")
                        {
                            if (points.Count > 0)
                            {
                                pointsOfPoints.Add(points.ToArray());
                                points.Clear();
                            }

                            continue;
                        }

                        if (spaceSplit[i] == "Z")
                        {
                            if (points.Count > 0)
                            {
                                pointsOfPoints.Add(points.ToArray());
                                points.Clear();
                            }

                            continue;
                        }

                        if (spaceSplit[i].Length == 1 && !char.IsDigit(spaceSplit[i][0]))
                            continue; // Ignore any other not processed 1 char that's not a digit (L)

                        if (i + 1 >= spaceSplit.Length) break; // No more to see


                        if (!float.TryParse(spaceSplit[i], NumberStyles.Float, CultureInfo.InvariantCulture, out var mmX)) continue;
                        if (!float.TryParse(spaceSplit[++i], NumberStyles.Float, CultureInfo.InvariantCulture, out var mmY)) continue;


                        var mmAbsX = Math.Clamp(halfDisplay.Width + mmX, 0, DisplayWidth);
                        var mmAbsY = Math.Clamp(halfDisplay.Height + mmY, 0, DisplayHeight);

                        int x = (int)(mmAbsX * ppmm.Width);
                        int y = (int)(mmAbsY * ppmm.Height);

                        points.Add(new Point(x, y));
                    }

                    if (points.Count > 0) // Leftovers, still this should never happen!
                    {
                        pointsOfPoints.Add(points.ToArray());
                        points.Clear();
                    }
                }

                if (pointsOfPoints.Count > 0)
                {
                    using var vecPoints = new VectorOfVectorOfPoint(pointsOfPoints.ToArray());
                    CvInvoke.DrawContours(mat, vecPoints, -1, EmguExtensions.WhiteColor, -1);
                }

            }

            _layers[layerIndex] = new Layer((uint)layerIndex, mat, this);
            progress.LockAndIncrement();
        });
    }

    protected override void PartialSaveInternally(OperationProgress progress)
    {
        using var outputFile = new FileStream(TemporaryOutputFileFullPath, FileMode.Open, FileAccess.Write);
        outputFile.Seek(HeaderSettings.SVGDocumentAddress, SeekOrigin.Begin);
        outputFile.SetLength(outputFile.Position);
        outputFile.WriteString(SVGDocument.SerializeToString());
    }

    #endregion
}