using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Inspectron.Hawkeye.Vision.Geometry;
using OpenCvSharp;
using OpenCvSharp.Extensions;
using Point = System.Drawing.Point;


namespace Lindt.Candybox.Demo
{
    public partial class MaskControl : UserControl
    {
        private Bitmap _backBuffer;
        private GrahamConvexHull _hull;

        public MaskControl()
        {
            InitializeComponent();
            _backBuffer = new Bitmap(1800, 1408);
            _hull = new GrahamConvexHull();
        }

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public Bitmap Mask { get; set; } = new Bitmap(1800, 1408);
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public Bitmap Original { get; set; } = new Bitmap(1800, 1408);

        protected override void OnPaintBackground(PaintEventArgs e)
        {
            //base.OnPaintBackground(e);
        }

        private bool _isDown = false;
        private Point _lastMouse;


        protected override void OnMouseDown(MouseEventArgs e)
        {
            _isDown = true;
            _lastMouse = ConvertCoordinates(new Point(e.X, e.Y));
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            _isDown = false;
        }

        private Pen _pen = new Pen(Color.White, 30);
        private Pen _penBlack = new Pen(Color.Black, 30);
        protected override void OnMouseMove(MouseEventArgs e)
        {

            if (_isDown&&e.Button==MouseButtons.Left)
            {
                var curPoint = ConvertCoordinates(new Point(e.X, e.Y));
                using (Graphics g = Graphics.FromImage(Mask))
                {
                    g.DrawLine(_pen, curPoint.X, curPoint.Y,_lastMouse.X,_lastMouse.Y);
                    g.FillEllipse(Brushes.White, _lastMouse.X - 15, _lastMouse.Y - 15, 30,30);
                }
            }
            if (_isDown && e.Button == MouseButtons.Right)
            {
                var curPoint = ConvertCoordinates(new Point(e.X, e.Y));
                using (Graphics g = Graphics.FromImage(Mask))
                {
                    g.DrawLine(_penBlack, curPoint.X, curPoint.Y, _lastMouse.X, _lastMouse.Y);
                    g.FillEllipse(Brushes.Black, _lastMouse.X - 15, _lastMouse.Y - 15, 30, 30);
                }
            }
            _lastMouse = ConvertCoordinates(new Point(e.X, e.Y));
            Invalidate();
        }

        private Pen _contourPen = new Pen(Color.GreenYellow, 3);
        protected override void OnPaint(PaintEventArgs e)
        {
            var mat = Mask.ToMat().CvtColor(ColorConversionCodes.BGR2GRAY);
            var contours = mat.FindContoursAsArray(RetrievalModes.External, ContourApproximationModes.ApproxNone);
            LastContours = contours;
            using (Graphics g = Graphics.FromImage(_backBuffer))
            {
                g.DrawImage(Original, 0, 0);

                for (int i = 0; i < contours.Length; i++)
                {
                    if (contours[i].Length > 1)
                    {
                        var points = contours[i].Select(x => new System.Drawing.Point(x.X, x.Y)).ToArray();
                        g.DrawPolygon(_contourPen, points);
                    }
                }
                g.DrawEllipse(Pens.Gray,_lastMouse.X-15, _lastMouse.Y - 15,30,30);
            }
            e.Graphics.DrawImage(_backBuffer,0, 0,Width,Height);
        }
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public OpenCvSharp.Point[][] LastContours { get; set; }

        Point ConvertCoordinates(Point coords)
        {
            return new Point(coords.X * 2, coords.Y * 2);
        }

        protected override void OnResize(EventArgs e)
        {
            base.OnResize(e);
         
        }
    }
}