using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace Metis.AutoAnalysis
{
    public class ScanGridControl : UserControl
    {
        List<ScanCellControl> _cellList = new List<ScanCellControl>();

        public int NumRow;
        public int NumCol;
        public double VsnWitch;
        public double VsnHeight;
        private SampleStageModel _setting;
        private double _width => _setting.Width;
        private double _height => _setting.Height;
        private double _dia => _setting.Diameter;
        private double _scal;
        private ScanRegionControl _scanRegion;
        VisionRectControl _vsnRect;
        private ScanCellControl _selectCell;

        public ScanGridControl()
        {
            this.Paint += ScanGridControl_Paint;
        }

        private void ScanGridControl_Paint(object sender, PaintEventArgs e)
        {
            if (_cellList.Count < 1) return;

            foreach (var cell in _cellList)
            { cell.Draw(e.Graphics); }

            _scanRegion.Draw(e.Graphics);

            _vsnRect.Draw(e.Graphics);

            if (_selectCell != null)
                e.Graphics.DrawRectangle(new Pen(Color.Blue), _selectCell.X, _selectCell.Y, _selectCell.Width - 1, _selectCell.Height - 1);

        }

        public void InitGrid(SampleStageModel stageSettingNow)
        {
            _setting = stageSettingNow;
            _selectCell = null;
            Controls.Clear();
            _cellList.Clear();
            DoubleBuffered = true;

            _scal = Math.Min(Parent.Width / _width, Parent.Height / _height);
            _scal = Math.Min(Parent.Height / _dia, _scal);

            float offxGrid = 0;
            float offyGrid = 0;
            float offxC = 0;
            float offyC = 0;

            if (_dia > _width)
            {
                offxGrid = (float)((_dia - _width) * _scal) / 2;
            }
            else
            {
                offxC = (float)((_width - _dia) * _scal) / 2;
            }
            if (_dia > _height)
            {
                offyGrid = (float)((_dia - _height) * _scal) / 2;
            }
            else
            {
                offyC = (float)((_height - _dia) * _scal) / 2;
            }

            float w = (float)(_width * _scal / NumCol - 1);
            float h = (float)(_height * _scal / NumRow - 1);
            for (int i = 0; i < NumRow * NumCol; i++)
            {
                var cell = new ScanCellControl();
                cell.Width = w;
                cell.Height = h;
                cell.BackColor = Color.White;

                var x = 1 + (w + 1) * (i % NumCol);
                if (i / NumCol % 2 > 0)
                { x = 1 + (w + 1) * (NumCol - i % NumCol - 1); }
                var y = 1 + (h + 1) * (i / NumCol);
                cell.X = x + offxGrid;
                cell.Y = y + offyGrid;
                _cellList.Add(cell);
            }
            _scanRegion = new ScanRegionControl();
            _scanRegion.Dia = (float)(_dia * _scal);
            _scanRegion.X = offxC;
            _scanRegion.Y = offyC;

            Width = (int)(Math.Max(_width, _dia) * _scal);
            Height = (int)(Math.Max(_height, _dia) * _scal);
            Location = new Point((Parent.Width - Width) / 2, (Parent.Height - Height) / 2);

            _vsnRect = new VisionRectControl();
            _vsnRect.Width = (float)(VsnWitch * _scal / 1000);
            _vsnRect.Height = (float)(VsnHeight * _scal / 1000);
            if (NumCol == 1)
            { VisionAt(NumRow / 2); }
            else if (NumRow == 1)
            { VisionAt(NumCol / 2); }
            else
            {
                VisionAt(NumCol * (NumRow / 2) + NumCol / 2);

            }
            this.Invalidate();
        }

        public void SetDone(int i, int id = 0)
        {
            _cellList[i].BackColor = Color.Lime;
            if (id > 0)
                _cellList[i].Id = id;
            Invalidate();
        }

        public void SetResult(int i, int id = 0)
        {
            _cellList[i].BackColor = Color.DeepPink;
            if (id > 0)
                _cellList[i].Id = id;
            Invalidate();
        }

        public void SetDoning(int i, int Id)
        {
            _vsnRect.Active = false;
            _selectCell = null;
            _cellList[i].BackColor = Color.Red;
            _cellList[i].Id = Id;
            Invalidate();
        }

        public void VisionAt(int i)
        {
            _vsnRect.Cell = _cellList[i];
            _vsnRect.Active = true;
            _selectCell = _cellList[i];
            Invalidate();
        }

        public void Reset()
        {
            _cellList.ForEach((c) => c.Reset());
            Invalidate();
        }

        public int GetHitId(int x, int y)
        {
            var cell = _cellList.FirstOrDefault((c) => c.InRegion(x, y));
            if (cell == null) return 0;
            return cell.Id;
        }

        public int GetIndex(int x, int y)
        {
            var i = _cellList.FindIndex((c) => c.InRegion(x, y));
            if (i > -1 && _cellList.Count > i)
            {
                _selectCell = _cellList[i];
                Invalidate();
            }
            return i;
        }

        public class VisionRectControl
        {
            public bool Active = true;

            public ScanCellControl Cell;

            public float Width = 0;
            public float Height = 0;


            public void Draw(Graphics g)
            {
                if (!Active)
                    return;
                var x = Cell.X;
                var y = Cell.Y;

                var pen = new Pen(Color.Blue);
                // g.DrawRectangle(pen, x, y, Cell.Width - 1, Cell.Height - 1);

                x = Cell.X + (Cell.Width - Width) / 2;
                y = Cell.Y + (Cell.Height - Height) / 2;

                pen = new Pen(Color.Red);
                g.DrawRectangle(pen, x, y, Width, Height);
            }
        }

        public class ScanCellControl
        {
            public int Id;
            public float X = 0;
            public float Y = 0;

            public float Width = 0;
            public float Height = 0;

            public Color BackColor = Color.Black;
            static Font _font = new Font("Verdana", 9);

            public bool InRegion(int x, int y)
            {
                var region = new RectangleF(X, Y, Width, Height);
                return region.Contains(x, y);
            }

            public void Reset()
            {
                BackColor = Color.White;
                Id = 0;
            }

            public void Draw(Graphics g)
            {
                var brush = new SolidBrush(BackColor);
                g.FillRectangle(brush, X, Y, Width, Height);
                if (Id > 0)
                {
                    SizeF fSize = g.MeasureString(Id.ToString(), _font);
                    g.DrawString(Id.ToString(), _font, new SolidBrush(Color.Black), new PointF(X + (Width - fSize.Width) / 2, Y + (Height - fSize.Height) / 2));
                }
            }
        }

        public class ScanRegionControl
        {
            public float X = 0;
            public float Y = 0;
            public float Dia = 0;

            public void Draw(Graphics g)
            {
                var pen = new Pen(Color.Green);
                pen.Width = 2;
                pen.DashStyle = DashStyle.Dash;
                g.DrawEllipse(pen, X + 1, Y + 1, Dia - 1, Dia - 1);
            }
        }
    }
}