using SharpDX;
using SharpDX.Direct2D1;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RealTimeGraphEx.ExtensionMethods
{
    public static class RenderTargetExtensions
    {
        public static void DrawPolygon(this RenderTarget target, SharpDX.Direct2D1.Factory factory, Brush stroke, double strokeWidth, Vector2[] vectors)
        {
            PathGeometry geo = new PathGeometry(factory);
            GeometrySink sink1;
            sink1 = geo.Open();
            sink1.BeginFigure(vectors[0], new FigureBegin());
            sink1.AddLines(vectors);
            sink1.EndFigure(new FigureEnd());
            sink1.Close();

            target.DrawGeometry(geo, stroke, (float)strokeWidth);

            vectors = null;
            geo.Dispose();
            sink1.Dispose();
            stroke.Dispose();
        }

        public static void DrawMultiPolygon(this RenderTarget target, SharpDX.Direct2D1.Factory factory, List<Brush> strokes, double strokeWidth, List<Vector2[]> vectorsCollection)
        {
            List<PathGeometry> geos = new List<PathGeometry>();
            List<GeometrySink> sinks = new List<GeometrySink>();

            foreach (var vectors in vectorsCollection)
            {
                var geo = new PathGeometry(factory);
                GeometrySink sink1;
                sink1 = geo.Open();
                sink1.BeginFigure(vectors[0], new FigureBegin());
                sink1.AddLines(vectors);
                sink1.EndFigure(new FigureEnd());
                sink1.Close();

                geos.Add(geo);
                sinks.Add(sink1);
            }

            for (int i = 0; i < geos.Count; i++)
            {
                target.DrawGeometry(geos[i], strokes[i], (float)strokeWidth);
            }

            vectorsCollection = null;

            for (int i = 0; i < strokes.Count; i++)
            {
                geos[i].Dispose();
                sinks[i].Dispose();
                strokes[i].Dispose();
            }
        }

        public static void FillPolygon(this RenderTarget target, SharpDX.Direct2D1.Factory factory, Brush fill, Vector2[] vectors)
        {
            PathGeometry geo = new PathGeometry(factory);
            GeometrySink sink1;
            sink1 = geo.Open();
            sink1.BeginFigure(vectors[0], new FigureBegin());
            sink1.AddLines(vectors);
            sink1.EndFigure(new FigureEnd());
            sink1.Close();

            target.FillGeometry(geo, fill);

            vectors = null;
            geo.Dispose();
            sink1.Dispose();
            fill.Dispose();
        }
    }
}