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

namespace WindowsFormsApplication1
{
    public partial class PlayGround : Form
    {
        int counter = 1;
        const int REQUIRED = 4;
        Boolean playerTurn = true;
        Button[,] buttons = new Button[5, 5];

        public PlayGround()
        {
            InitializeComponent();
            initGame();
        }

        private void initGame()
        {
            int i = 0;
            int j = 0;
            foreach (Control c in this.Controls)
            {
                if (c is Button)
                {
                    buttons[i, j] = (Button) c;
                }
                j++;
                if (j > 4)
                {
                    i++;
                    j = 0;
                }

            }


        }

        private void button_Click(object sender, EventArgs e)
        {
            Button b = (Button)sender;
            if (playerTurn)
                b.Text = "X";
            else b.Text = "O";
            checkForWin(playerTurn);
            playerTurn = !playerTurn;
        }

        private void checkForWin(Boolean playerTurn)
        {
            string znak;
            bool win = false;
            if (playerTurn) znak = "X";
            else znak = "O";
            for (int x = 0; x < 5; x++) {
                for (int y = 0; y < 5; y++)
                {
                    for(int i = -1; i <= 1; i++)
                        for (int j = -1; j <= 1; j++)
                        {
                            if (i == 0 && j == 0)
                            {
                                win = check(znak, x + i, y + j, i, j);
                                if (!win) counter = 1;
                            }
                        }
                }
            }

            if (win)
                MessageBox.Show("One of the players won!", "Congratulation!");
        }

        private Boolean check(string znak, int x, int y, int i, int j){
            if (counter == REQUIRED)
            {
                return true;
            }
            if ((x >= 0 && x <= 4) && (y >= 0 && y <= 4))
            {
                if (buttons[x, y].Text == znak)
                {
                    counter++;
                    return check(znak,  x + i, y +j,  i,  j);
                }
                else return false;

            }
            return false;
        }

    }
}