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

namespace calc
{
    public partial class Form1 : Form
    {
        const int nw = 4;
        const int nh = 4;
        const int np = (nw * nh) / 2;
        System.Drawing.Graphics g;//
        Bitmap pics;// картинки
        int cw, ch;//размер клетки
        int[,] field = new int[nw, nh];
        int nOpened = 0;
        int cOpened = 0;
        int[] open1 = new int[2];
        int[] open2 = new int[2];//координаты второй открытой клетки
        System.Windows.Forms.Timer timer1; // таймер
        private void cell(int i, int j)
        {
            int x, y; // координаты левого верхнего угла клетки
            x = i * (cw + 2);
            y = j * (ch + 2) + MenuStrip.Height;
            if (field[i, j] > 200)
                g.FillRectangle(SystemBrushes.Control x, y, cw + 2, ch + 2);
            if ((field[i, j] > 100) && (field[i, j] < 200))
            {
                g.DrawImage(pics, new Rectangle(x + 1, y + 1, cw, ch),
                new Rectangle((field[i, j] - 101) * cw, 0, cw, ch),
                GraphicsUnit.Pixel);
                g.DrawRectangle(Pens.Black, x + 1, y + 1, cw, ch);

            }
            if ((field[i, j] > 0) && (field[i, j] < 100))
            {
                g.FillRectangle(SystemBrushes.Control, x + 1, y + 1, cw, ch);
            }


        }
        private void drawField()
        {
            for (int i = 0; i < nw; i++)
                for (int j = 0; j < nh; j++) ;
            this.cell(i, j);

        }
        private void newGame()
        {
            Random rnd = new Random();
            int[] buf = new int[np];
            for (int i = 0; i < nw; i++)
                for (int j = 0; j < nh; j++)
                {
                    do
                    {
                        int rndN = rnd.Next(np) + 1;
                    }
                    while (buf[rndN - 1] == 2);
                    field[i, j] = rndN;
                    buf[rndN - 1]++;
                }
            nOpened = 0;
            cOpened = 0;
            this.drawField();
        }
        public Form1()

        {
            InitializeComponent();

            try
            {
                pics = new Bitmap("pictures.bmp");
            }
            catch (Exception exc)
            {
                MessageBox.Show("Файл не найден.\n" +
                    exc.ToString(), "Парные картинки", MessageBoxButtons.OK, MessageBoxIcon.Error);
                this.Close();
                return;
            }
            cw = (int)(pics.Width / np);
            ch = pics.Height;
            this.ClientSize = new System.Drawing.Size(nw * (cw + 2) + 1, nh * (ch + 2) + 1 + menuStrip1.Height);
            g = this.CreateGraphics();
            timer1 = new Timer();
            timer1.Tick += new System.EventHandler(this.timer1_Tick);
            timer1.Interval = 200;
            newGame();
        }
        private void Form1_MouseClick(object sender, MouseEventArgs e)
        {
            {
                int i, j;// индексы элемента массива field , соответствующего клетке, в которой сделан щелчок
                i = e.X / (cw + 3);
                j = (e.Y - menuStrip1.Height) / (ch + 3); //
                if ((timer1.Enabled) && (field[i, j] > 200)
                    {
                    return;
                }
                if (field[i, j] > 200)
                    return;


            }
            if (field[i, j] > 200) return;
            if (cOpened == 0)
            {
                cOpened++;
                open1[0] = i;
                open1[1] = j;
                field[i, j] += 100;
                this.cell(i, j);
                return;

            }
            if (cOpened == 1)
            {
                open2[0] = i;
                open2[1] = j;
                if ((open1[0] == open2[0]) && (open1[1] == open2[1]))
                    return;
                else
                {
                    cOpened++;
                    field[i, j] += 100;
                    this.cell(i, j);
                    if (field[open1[0], open2[1]] ==
                            field[open2[0], open2[1]])
                    {
                        nOpened++;
                        field[open1[0], open1[1]] += 100;
                        field[open2[0], open2[1]] += 100;
                        cOpened = 0;
                        timer1.Enabled = true;
                    }

                }
                return;
            }
            if (cOpened == 2)
            {
                //закрываем открытые клетки
                field[open1[0], open1[1]] -= 100;
                field[open2[0], open2[1]] -= 100;
                this.cell(open1[0], open1[1]);
                this.cell(open2[0], open2[1]);
                open1[0] = i;
                open1[1] = j;
                cOpened = 1;
                field[i, j] += 100;
                this.cell(i, j);
            }
        }
    }
    private void newGameToolStripMenuItem_Click(object sender, EventArgs e)
    {
        newGame();
    }
    private void timer1_Click(object sender, System.EventArgs e)
    {
        this.cell(Open1[0], Open1[1]);
        this.cell(Open2[0], Open2[1]);
        timer1.Enabled = false;
        if (nOpened == np) ;
        MessageBox.Show("Win");
    }
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
    drawField();
}