/// file: EllipseBorderPencil.cs
/// Author: Maxime Rohmer <maxluligames@gmail.com>
/// Brief: A tool that paints the outline of an ellipse
/// 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
{
    internal class EllipseBorderPencil : PaintTool
    {
        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 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 bool IsShiftPressed { get => _isShiftPressed; set => _isShiftPressed = value; }
        public bool IsCtrlPressed { get => _isCtrlPressed; set => _isCtrlPressed = 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 EllipseBorderPencil(string name)
        {
            NeedsFullRefresh = true;
            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;
            Utils = new PaintToolUtils(this);
        }
        public void Add(Point point)
        {
            List<Point> myDrawing = Drawings[Drawings.Count - 1];
            if (myDrawing.Count == 0 || myDrawing.Count == 1)
            {
                myDrawing.Add(point);
            }
            else
            {
                myDrawing[1] = point;
            }
            Drawings[Drawings.Count - 1] = myDrawing;
        }
        public string PaintSVG()
        {
            string result = "";
            string newLine = Environment.NewLine;

            int drawingCounter = 0;
            Size pointSize;

            foreach (List<Point> drawing in Drawings)
            {
                if (drawing.Count == 2)
                {
                    Point start = drawing[0];
                    Point end = drawing[1];

                    List<Point> points;
                    if (drawingCounter == Drawings.Count - 1)
                    {
                        points = Utils.ConvertRectangleIntoPositive(IsCtrlPressed, drawing[0], drawing[1]);
                    }
                    else
                    {
                        points = Utils.ConvertRectangleIntoPositive(false, drawing[0], drawing[1]);
                    }

                    start = points[0];
                    end = points[1];

                    Size size = new Size((end.X - start.X) / 2, (end.Y - start.Y) / 2);
                    result += "<ellipse cx=\"" + (start.X + size.Width) + "\" cy=\"" + (start.Y + size.Height) + "\" rx=\"" + size.Width + "\" ry=\"" + size.Height + "\" style=\"stroke:rgb(" + Colors[drawingCounter].R + ", " + Colors[drawingCounter].G + ", " + Colors[drawingCounter].B + ");\" stroke-width=\"" + Widths[drawingCounter] + "\" fill=\"none\"/>";
                    result += newLine;
                }
                drawingCounter++;
            }
            return result;
        }
        public void Paint(Bitmap canvas)
        {
            Graphics gr = Graphics.FromImage(canvas);
            int drawingCounter = 0;
            foreach (List<Point> drawing in Drawings)
            {
                if (drawing.Count == 2)
                {
                    Point start = drawing[0];
                    Point end = drawing[1];

                    List<Point> points;
                    if (drawingCounter == Drawings.Count - 1)
                    {
                        points = Utils.ConvertRectangleIntoPositive(IsCtrlPressed, drawing[0], drawing[1]);
                    }
                    else
                    {
                        points = Utils.ConvertRectangleIntoPositive(false, drawing[0], drawing[1]);
                    }

                    start = points[0];
                    end = points[1];

                    gr.DrawEllipse(new Pen(Colors[drawingCounter], Widths[drawingCounter]), new Rectangle(start, new Size(end.X - start.X, end.Y - start.Y)));
                }
                drawingCounter++;
            }
        }
        public void Start(Color color, int width)
        {
            Utils.StandartStart(color, width);
        }
        public void Clear()
        {
            Utils.StandartClear();
        }
        public void Stop()
        {
            List<Point> myDrawing = Drawings.Last();
            Drawings[Drawings.Count - 1] = Utils.ConvertRectangleIntoPositive(IsCtrlPressed, myDrawing[0], myDrawing[1]);
        }
        private Bitmap PostProcessing(List<Point> Drawing, Bitmap bmp, int width, Color color)
        {
            return bmp;
        }
        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()
        {
            EllipseBorderPencil result = new EllipseBorderPencil(Name);
            result.Width = Width;
            result.Color = Color;
            return (Object)(result);
        }
    }
}