using System;
using System.Drawing;
using System.Collections.Generic;
using System.Windows.Forms;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        Graphics DrawBox;
        Point First;
        PaintEventArgs e;
        Graphics g;
        bool editingMode = false;
        List<Drawable> drawList = new List<Drawable>();
        List<Drawable> clicked = new List<Drawable>();
        Drawable curent;
        Color curentColor=Color.FromArgb(0,0,0);
        bool MouseDown1=false;
        Rectangle sqare;
        Drawable a1 = null; 
        bool sqareClicked = false;
        string curentShape="Линия";
        public Form1()
        {
            InitializeComponent();
            g =CreateGraphics();
            
        }

        private void StartDraw(object sender, MouseEventArgs e)
        {
            if (!editingMode)
            {
                if (!MouseDown1)
                {
                    First = new Point(e.Location.X, e.Location.Y);
                    MouseDown1 = true;
                }
                switch(curentShape)
                {
                    case "Линия":
                        {
                            drawList.Add(new Line1(new Point(e.Location.X, e.Location.Y), new Pen(curentColor, WidthBar.Value)));
                            break;
                        }
                    case "Квадрат":
                        {
                            drawList.Add(new Rectangle1(new Point(e.Location.X, e.Location.Y), new Pen(curentColor, WidthBar.Value)));
                            break;
                        }
                    case "Круг":
                        {
                            drawList.Add(new circle(new Point(e.Location.X, e.Location.Y), new Pen(curentColor, WidthBar.Value)));
                            break;
                        }
                }
            }
            else
            {
                clicked.Clear();
                for (int i = 0; i < drawList.Count; i++)
                {
                    if (isInArea(drawList[i], new Point(e.Location.X, e.Location.Y)))
                    {
                        clicked.Add(drawList[i]);
                    }
                }
                if (clicked.Count > 0)
                {
                    int minwidth=999;
                    foreach(var a in clicked)
                    {
                        if (a.width < minwidth)
                        {
                            minwidth = a.width;
                            a1 = a;
                        }
                    }
                    curent = a1;
                    sqare.Location = new Point(curent.First.X + curent.width-10, curent.First.Y + curent.height-10);
                    sqare.Width = 10;
                    sqare.Height = 10;
                    MouseDown1 = true;
                    g.DrawRectangle(Pens.Red, sqare);
                }
                     if (isInArea(sqare, e.Location))
                    { 
                        MouseDown1 = true; 
                        sqareClicked = true; 
                    }
                    else sqareClicked = false;
                        
                
            }
        }
        protected override void OnPaint(PaintEventArgs e)
        {
            this.e = e;
            base.OnPaint(e);
            DrawBox = e.Graphics;
           

        }

        private void Drawing(object sender, EventArgs e)
        {
            draw();
        }
        public void draw()
        {
            //if (mouse != null)
            //{
            //    Rectangle a = new Rectangle(0, curent.Location.Y, 10, 10);
            //    DrawBox.DrawEllipse(Pens.Black, a);
            //}
        }

        private void button1_Click(object sender, EventArgs e)
        {
            editingMode =!editingMode;
            curent = null;
        }


        public void refresh()
        {
            g.Clear(Color.White);
            foreach (Drawable a in drawList)
                a.draw(g);
            if (sqare != null)
                g.DrawRectangle(Pens.Red, sqare);
        }
        private bool isInArea(Rectangle area, Point p1)
        {
            bool width, height;
            if (area.Width < 0)
            {
                if (p1.X >= area.Location.X + area.Width && p1.X <= area.Location.X)
                {
                    width = true;
                }
                else
                    width = false;
            }
            else
            {
                if (p1.X >= area.Location.X && p1.X <= area.Location.X + area.Width)
                {
                    width = true;
                }
                else
                    width = false;
            }
            if (area.Height < 0)
            {
                if (p1.Y >= area.Location.Y + area.Height && p1.Y <= area.Location.Y)
                {
                    height = true;
                }
                else
                    height = false;
            }
            else
            {
                if (p1.Y >= area.Location.Y && p1.Y <= area.Location.Y + area.Height)
                {
                    height = true;
                }
                else
                    height = false;
            }
            if (width && height)
                return true;
            return false;
        }
        private bool isInArea(Drawable area, Point p1)
        {
            bool width,height;
            if (area.width < 0)
            {
                if (p1.X >= area.First.X + area.width && p1.X <= area.First.X)
                {
                    width = true;
                }
                else
                    width = false;
            }
            else
            {
                if (p1.X >= area.First.X && p1.X <= area.First.X + area.width)
                {
                    width = true;
                }
                else
                    width = false;
            }
            if (area.height < 0)
            {
                if (p1.Y >= area.First.Y + area.height && p1.Y <= area.First.Y)
                {
                    height = true;
                }
                else
                    height = false;
            }
            else
            {
                if (p1.Y >= area.First.Y && p1.Y <= area.First.Y + area.height)
                {
                    height = true;
                }
                else
                    height = false;
            }
            if (width && height)
                return true;
            return false;
        }

        private void MUHUC(object sender, EventArgs e)
        {
            if (curent != null)
            {
                curent.width -= 5;
                curent.height -= 5; Update();
                curent.update();
                refresh();
                curent.draw(g);
            }
        }

        private void PILUS(object sender, EventArgs e)
        {
            if (curent != null)
            {
                curent.width += 5;
                curent.height += 5;
                curent.update();
                refresh();
                curent.draw(g);
            }
        }

        private void ChangeColor(object sender, EventArgs e)
        {
            curentColor = Color.FromArgb(red.Value, green.Value, blue.Value);
            Prewiev.BackColor = curentColor;
            Prewiev.Height = WidthBar.Value;
        }

        private void SetShape(object sender, EventArgs e)
        {
            curentShape = ((Button)sender).Text;
        }

        private void CleanAll(object sender, EventArgs e)
        {
            g.Clear(Color.White);
            drawList.Clear();
        }

        private void MouseUp1(object sender, MouseEventArgs e)
        {
            MouseDown1 = false;
            if(!editingMode)
            if (e.Location.X - drawList[drawList.Count - 1].First.X < 3 && e.Location.Y - drawList[drawList.Count - 1].First.Y < 3)
                drawList.RemoveAt(drawList.Count - 1);
        }

        private void MouseMove1(object sender, MouseEventArgs e)
        {
            if (MouseDown1)
            {
                if (!editingMode )
                {
                    drawList[drawList.Count - 1].changeShape(e.Location.X - First.X, e.Location.Y - First.Y);
                    drawList[drawList.Count - 1].draw(g);
                    refresh();
                }
                else
                {
                    if (!sqareClicked)
                    {
                        curent.setPosition(e.Location);
                        refresh();
                    }
                    else
                    {
                        sqare.Location = new Point(e.Location.X-10,e.Location.Y-10);
                        curent.changeShape(sqare.Location.X - curent.First.X+10, sqare.Location.Y - curent.First.Y+10);
                        refresh();
                        curent.draw(g);
                    }
                }
            }
        }

      

      
    }
}