using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using bbiwarg.Detectors.Touch;
using bbiwarg.Utility;

namespace bbiwarg.Graphics
{
    class TouchEventVisualizer
    {
        public OutputImage OutputImage { get; private set; }
        
        private List<Vector2D> touchPositions;
        private int width, height;

        public TouchEventVisualizer(int width, int height)
        {
            touchPositions = new List<Vector2D>();
            this.width = width;
            this.height = height;
        }

        public void addPalmTouchEvent(PalmTouchEvent e)
        {
            Vector2D pos = new Vector2D((int) (e.RelativePalmPosition.X * width), (int) (e.RelativePalmPosition.Y * height));
            touchPositions.Add(pos);
        }

        public void updateImage()
        {
            OutputImage = new OutputImage(width, height);

            for (int i = 1; i < touchPositions.Count; ++i)
            {
                OutputImage.drawLineSegment(new LineSegment2D(touchPositions[i - 1], touchPositions[i]), 255, 255, 255);
            }

            if (touchPositions.Count != 0)
                OutputImage.fillCircle(touchPositions.Last<Vector2D>().IntX, touchPositions.Last<Vector2D>().IntY, 3, 255, 0, 0);
        }

        public void Reset()
        {
            touchPositions.Clear();
            OutputImage = new OutputImage(width, height);
        }
    }
}