using DevExpress.Docs.Presentation;
using DevExpress.Docs.Office;
using DevExpress.Office.Utils;
using DevExpress.Drawing;
using System.Drawing;

Stream AddImage(Stream imageStream, bool lockAspectRatio,
    float x, float y, float width, float height,
    bool shouldCrop, float cropLeft, float cropRight, float cropTop, float cropBottom,
    Color outlineColor, float outlineWidth, DocumentFormat outputFormat) {
    using var presentation = new Presentation();
    presentation.Slides.Clear();

    var slide = new Slide(SlideLayoutType.Blank);
    presentation.Slides.Add(slide);

    var pictureShape = new PictureShape() {
        Image = DXImage.FromStream(imageStream),
        X = Units.InchesToDocumentsF(x),
        Y = Units.InchesToDocumentsF(y),
        Width = Units.InchesToDocumentsF(width),
        Height = Units.InchesToDocumentsF(height),
        Outline = new LineStyle { Fill = new SolidFill(outlineColor), Width = Units.PointsToDocumentsF(outlineWidth) }
    };

    if(shouldCrop) {
        pictureShape.CropLeft = cropLeft;
        pictureShape.CropTop = cropTop;
        pictureShape.CropRight = cropRight;
        pictureShape.CropBottom = cropBottom;
    }

    pictureShape.LockSettings.DisableAspectRatioChange = lockAspectRatio;
    slide.Shapes.Add(pictureShape);

    // Create output stream and save document in target format
    return CreateOutputStream(presentation, outputFormat);
}

Stream AddTextbox(string text, float x, float y, float width, float height, bool lockAspectRatio,
    Color fillColor, Color outlineColor, float outlineWidth, DocumentFormat outputFormat) {
    using var presentation = new Presentation();
    presentation.Slides.Clear();

    var slide = new Slide(SlideLayoutType.Blank);
    presentation.Slides.Add(slide);

    var textboxShape = new Shape(ShapeType.Rectangle) {
        TextArea = new TextArea(text),
    };

    textboxShape.TextArea.Level1ParagraphProperties.TextProperties.Fill = new SolidFill(Color.Black);
    FormatShape(textboxShape, x, y, width, height, lockAspectRatio, outlineWidth, outlineColor, fillColor);
    slide.Shapes.Add(textboxShape);

    // Create output stream and save document in target format
    return CreateOutputStream(presentation, outputFormat);
}

Stream AddFigure(ShapeType shapeType, float x, float y, float width, float height, bool lockAspectRatio,
    Color fillColor, Color outlineColor, float outlineWidth, DocumentFormat outputFormat) {
    using var presentation = new Presentation();
    presentation.Slides.Clear();

    var slide = new Slide(SlideLayoutType.Blank);
    presentation.Slides.Add(slide);

    var shape = new Shape(shapeType);
    FormatShape(shape, x, y, width, height, lockAspectRatio, outlineWidth, outlineColor, fillColor);
    slide.Shapes.Add(shape);

    // Create output stream and save document in target format
    return CreateOutputStream(presentation, outputFormat);
}

Stream AddShapeGroup(ShapeType shapeType, int numberOfShapes,
    float x, float y, float width, float height,
    bool lockAspectRatio, Color fillColor, Color outlineColor, float outlineWidth, DocumentFormat outputFormat) {
    using var presentation = new Presentation();
    presentation.Slides.Clear();

    var slide = new Slide(SlideLayoutType.Blank);
    presentation.Slides.Add(slide);

    var groupShape = new GroupShape();
    for(int i = 0; i < numberOfShapes; i++) {
        var shape = new Shape(shapeType);
        FormatShape(shape, x, y, width, height, lockAspectRatio, outlineWidth, outlineColor, fillColor);
        groupShape.Shapes.Add(shape);
        x += 0.5f;
        y += 0.5f;
    }

    slide.Shapes.Add(groupShape);

    // Create output stream and save document in target format
    return CreateOutputStream(presentation, outputFormat);
}

void FormatShape(Shape shape, float x, float y, float width, float height, bool lockAspectRatio, float outlineWidth, Color outlineColor, Color fillColor) {
    shape.X = Units.InchesToDocumentsF(x);
    shape.Y = Units.InchesToDocumentsF(y);
    shape.Width = Units.InchesToDocumentsF(width);
    shape.Height = Units.InchesToDocumentsF(height);
    shape.Fill = new SolidFill(fillColor);
    shape.Outline = new LineStyle { Fill = new SolidFill(outlineColor), Width = Units.PointsToDocumentsF(outlineWidth) };
    shape.LockSettings.DisableAspectRatioChange = lockAspectRatio;
}

Stream CreateOutputStream(Presentation presentation, DocumentFormat outputFormat) {
    var outputStream = new MemoryStream();

    // Save document in target format
    presentation.SaveDocument(outputStream, outputFormat);

    outputStream.Seek(0, SeekOrigin.Begin);
    return outputStream;
}