// Pablo Vigara Fernández & Sergio Gumpert

using System;
using System.Threading;

class Pong
{
    static void Main()
    {
        Console.SetWindowSize(80, 25);
        Console.SetBufferSize(80, 25);
        int y1 = 12;
        int x1 = 10;
        int y2 = 12;
        int x2 = 70;
        int xBall = 40, yBall = 5;
        int xSpeed = 1, ySpeed = 1;
        int conter1 = 0 ,conter2 = 0;
        bool finished = false;
        ConsoleKeyInfo userkey;
        do
        {
            Console.Clear();

            Console.SetCursorPosition(x1, y1);
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.Write("|");

            Console.SetCursorPosition(x2, y2);
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.Write("|");

            Console.SetCursorPosition(xBall, yBall);
            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.Write("O");

			Console.SetCursorPosition(37, 2);
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.Write(conter1 + "-" + conter2);

            Console.SetCursorPosition(1, 1);

            if (Console.KeyAvailable)
            {
                userkey = Console.ReadKey(true);

                if ((userkey.Key == ConsoleKey.W) && (y1 > 1))
                    y1--;
                if ((userkey.Key == ConsoleKey.S) && (y1 < 24))
                    y1++;
                if ((userkey.Key == ConsoleKey.UpArrow) && (y2 > 1))
                    y2--;
                if ((userkey.Key == ConsoleKey.DownArrow) && (y2 < 24))
                    y2++;

                if (userkey.Key == ConsoleKey.Escape)
                    finished = true;
            }

			if (xBall == (x1-5))
            {
				conter2++;
				xBall = 40 ; yBall = 5;
				x1 = 10 ; y1 = 12;
				x2 = 70 ; y2 = 12;
				xSpeed = -xSpeed;
                ySpeed = -ySpeed;
            }

			if (xBall == (x2+5))
            {
				conter1++;
				xBall = 40 ; yBall = 5;
				x1 = 10 ; y1 = 12;
				x2 = 70 ; y2 = 12;
				xSpeed = -xSpeed;
                ySpeed = -ySpeed;
            }
            if (xBall == 10 && yBall == y1)
            {
                xSpeed = -xSpeed;
                ySpeed = -ySpeed;
            }
            if (xBall == 70 && yBall == y2)
            {
                xSpeed = -xSpeed;
                ySpeed = -ySpeed;
            }
			xBall += xSpeed;
            yBall += ySpeed;
            if ((xBall <= 1) || (xBall >= 78))
                xSpeed = -xSpeed;
			if ((yBall <= 1) || (yBall >= 24))
				ySpeed = -ySpeed;




            Thread.Sleep(100);
        }
        while ( ! finished );

        Console.ForegroundColor = ConsoleColor.White;
    }
}