using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using OpenTK.Graphics.OpenGL;
using MathNet.Numerics.LinearAlgebra.Single;

namespace bbiwarg.Graphics
{
    class Point : IGraphicElement
    {
        public Vertex position;
        public Color color;
        public float size;

        public Point(Vertex position, Color color, float size)
        {
            this.position = position;
            this.color = color;
            this.size = size;
        }

        public void draw(int width, int height)
        {
            GL.Color4(color);

            float relX = position.x - width / 2;
            float relY = height / 2 - position.y;

            GL.Begin(BeginMode.Polygon);
            GL.Vertex3(relX - size, relY + size, -position.z);
            GL.Vertex3(relX + size, relY + size, -position.z);
            GL.Vertex3(relX + size, relY - size, -position.z);
            GL.Vertex3(relX - size, relY - size, -position.z);
            GL.End();
        }

        public List<Vector> getVertices(int width, int height)
        {
            float relX = position.x - width / 2;
            float relY = height / 2 - position.y;

            List<Vector> result = new List<Vector>();

            Vector temp = new DenseVector(new float[] { relX - size, relY + size, -position.z });
            result.Add(temp);
            temp = new DenseVector(new float[] { relX + size, relY + size, -position.z });
            result.Add(temp);
            temp = new DenseVector(new float[] { relX + size, relY - size, -position.z });
            result.Add(temp);
            temp = new DenseVector(new float[] { relX - size, relY - size, -position.z });
            result.Add(temp);

            return result;

        }

        public uint[] getTriangleIndices()
        {
            return new uint[] { 0, 1, 2, 0, 2, 3 };
        }

        public Color getColor()
        {
            return color;
        }
    }
}