using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;

namespace RealTimeGraphEx.ExtensionMethods
{
    public static class BrushExtensions
    {
        public static SharpDX.Direct2D1.Brush ToDxBrush(this Brush brush, SharpDX.Direct2D1.RenderTarget renderTarget)
        {
            if (brush == null) return null;

            if (brush.GetType() == typeof(SolidColorBrush))
            {
                return new SharpDX.Direct2D1.SolidColorBrush(renderTarget, new SharpDX.Color4((brush as SolidColorBrush).Color.ToRgba()), new SharpDX.Direct2D1.BrushProperties() { Opacity = (float)brush.Opacity });
            }
            else if (brush.GetType() == typeof(LinearGradientBrush))
            {
                var linear = brush as LinearGradientBrush;
                var startPoint = new SharpDX.Vector2((float)linear.StartPoint.X, (float)linear.StartPoint.Y);
                var endPoint = new SharpDX.Vector2((float)linear.EndPoint.X, (float)linear.EndPoint.Y);
                SharpDX.Direct2D1.GradientStop[] stops = new SharpDX.Direct2D1.GradientStop[linear.GradientStops.Count];

                for (int i = 0; i < linear.GradientStops.Count; i++)
                {
                    stops[i] = new SharpDX.Direct2D1.GradientStop();
                    stops[i].Color = new SharpDX.Color4(linear.GradientStops[i].Color.ToRgba());
                    stops[i].Position = (float)linear.GradientStops[i].Offset;
                }

                var dxBrush = new SharpDX.Direct2D1.LinearGradientBrush(
                    renderTarget,
                    new SharpDX.Direct2D1.LinearGradientBrushProperties()
                    {
                        StartPoint = startPoint,
                        EndPoint = endPoint,
                    },
                    new SharpDX.Direct2D1.GradientStopCollection(renderTarget, stops));

                return dxBrush;

    //            var linearGradientBrush = new SharpDX.Direct2D1.LinearGradientBrush(renderTarget, new SharpDX.Direct2D1.LinearGradientBrushProperties()
    //            {
    //                StartPoint = new SharpDX.Vector2(50, 0),
    //                EndPoint = new SharpDX.Vector2(450, 0),
    //            },
    //new SharpDX.Direct2D1.GradientStopCollection(renderTarget, new SharpDX.Direct2D1.GradientStop[]
    //                {
    //                    new SharpDX.Direct2D1.GradientStop()
    //                    {
    //                        Color = SharpDX.Color.Blue,
    //                        Position = 0,
    //                    },
    //                    new SharpDX.Direct2D1.GradientStop()
    //                    {
    //                        Color = SharpDX.Color.Green,
    //                        Position = 1,
    //                    }
    //                }));

    //            return linearGradientBrush;
            }
            else
            {
                return null;
            }
        }
    }
}