/// file: DotPencil.cs
/// Author: Maxime Rohmer <maxluligames@gmail.com>
/// Brief: A variant of the default tool
/// Version: 0.1.0
/// Date: 17/06/2022

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;

namespace Paint_2
{
    public class DotPencil : PaintTool
    {
        const int POST_PROCESSING_PRECISION = 1;

        private List<List<Point>> _drawings;
        private List<List<Point>> _drawingsRedo;
        private bool _needsFullRefresh;
        private bool _isShiftPressed;
        private bool _isCtrlPressed;
        private PaintToolUtils Utils;
        private List<Color> _colors;
        private List<Color> _colorsRedo;
        private List<int> _widths;
        private List<int> _widthsRedo;
        private Color _color;
        private string _name;
        private int _width;

        public List<List<Point>> Drawings { get => _drawings; set => _drawings = value; }
        public List<List<Point>> DrawingsRedo { get => _drawingsRedo; set => _drawingsRedo = value; }
        public bool NeedsFullRefresh { get => _needsFullRefresh; set => _needsFullRefresh = value; }
        public bool IsShiftPressed { get => _isShiftPressed; set => _isShiftPressed = value; }
        public bool IsCtrlPressed { get => _isCtrlPressed; set => _isCtrlPressed = value; }
        public List<Color> Colors { get => _colors; set => _colors = value; }
        public List<Color> ColorsRedo { get => _colorsRedo; set => _colorsRedo = value; }
        public List<int> Widths { get => _widths; set => _widths = value; }
        public List<int> WidthsRedo { get => _widthsRedo; set => _widthsRedo = value; }
        public Color Color { get => _color; set => _color = value; }
        public string Name { get => _name; set => _name = value; }
        public int Width { get => _width; set => _width = value; }

        public DotPencil(string name)
        {
            Drawings = new List<List<Point>>();
            DrawingsRedo = new List<List<Point>>();
            Colors = new List<Color>();
            ColorsRedo = new List<Color>();
            Widths = new List<int>();
            WidthsRedo = new List<int>();
            Name = name;
            NeedsFullRefresh = false;

            Utils = new PaintToolUtils(this);
        }
        public void Add(Point point)
        {
            Drawings[Drawings.Count - 1].Add(point);
        }
        public void Paint(Bitmap canvas)
        {
            Graphics gr = Graphics.FromImage(canvas);
            int drawingCounter = 0;
            Size pointSize;

            foreach (List<Point> drawing in Drawings)
            {
                int pointCounter = 0;
                foreach (Point p in drawing)
                {
                    pointSize = new Size(Widths[drawingCounter], Widths[drawingCounter]);
                    gr.FillEllipse(new SolidBrush(Colors[drawingCounter]), new Rectangle(new Point(p.X - pointSize.Width / 2, p.Y - pointSize.Height / 2), pointSize));
                    pointCounter += 1;
                }
                drawingCounter += 1;
            }
        }
        public void Start(Color color, int width)
        {
            Utils.StandartStart(color, width);
        }
        public void Clear()
        {
            Utils.StandartClear();
        }
        public void Stop()
        {
            for (int i = 0; i < POST_PROCESSING_PRECISION; i++)
            {
                List<Point> Drawing = Drawings[Drawings.Count - 1];
                Drawings[Drawings.Count - 1] = PostProcessing(Drawing);
            }
        }
        private List<Point> PostProcessing(List<Point> Drawing)
        {
            //THIS SHOULD BE REMOVED, IT IS ONLY HERE TO BE EASIER TO DEBUG THE CONCEPT
            List<Point> NewDrawing = new List<Point>();
            Point previous = new Point(-1, -1);
            //Implementing a post processing
            foreach (Point point in Drawing)
            {
                if (previous != new Point(-1, -1))
                {
                    NewDrawing.Add(new Point((previous.X + point.X) / 2, (previous.Y + point.Y) / 2));
                    previous = point;
                }
                else
                {
                    previous = point;
                }
                NewDrawing.Add(point);
            }
            return NewDrawing;
        }
        public List<Color> GetLastColors(int colorNumber)
        {
            return Utils.SandartGetLastColors(colorNumber);
        }
        public override string ToString()
        {
            return Name;
        }

        public void Undo()
        {
            Utils.StandartUndo();
        }

        public void Redo()
        {
            Utils.StandartRedo();
        }

        public object Clone()
        {
            DotPencil result = new DotPencil(Name);
            result.Width = Width;
            result.Color = Color;
            return (Object)(result);
        }

        public string PaintSVG()
        {
            string result = "";
            string newLine = Environment.NewLine;

            for (int drawCount = 0; drawCount < Drawings.Count; drawCount++)
            {
                Point p1;
                Point p2;
                List<Point> drawing = Drawings[drawCount];
                Color color = Colors[drawCount];
                int width = Widths[drawCount];
                for (int pointIndex = 0; pointIndex < drawing.Count; pointIndex++)
                {
                    if (pointIndex >= 1)
                    {
                        p1 = drawing[pointIndex - 1];
                        p2 = drawing[pointIndex];

                        result += "<ellipse cx=\"" + p2.X + "\" cy=\"" + p2.Y + "\" rx=\"" + width / 2 + "\" ry=\"" + width / 2 + "\" style=\"fill:rgb(" + color.R + ", " + color.G + ", " + color.B + ");\"/>";
                        result += newLine;
                    }

                }
            }

            return result;
        }
    }
}