import java.awt.*;
import java.util.*;
import java.applet.*;

public class PongBall
{
    //Variables============================================
    
    //position and speed of ball
    private int x_pos;
    private int y_pos;
    private int x_speed;
    private int y_speed;

    //sides of the ball
    private int ball_top;
    private int ball_bottom;
    private int ball_left;
    private int ball_right;
    
    //sides of player 2 paddles
    private int player_top2;
    private int player_bottom2;
    private int player_right2;
    private int player_left2;

    //sides of player 1 paddles
    private int player_top1;
    private int player_bottom1;
    private int player_right1;
    private int player_left1;

    //score variables
    private int scoreP1;
    private int scoreP2;
    String score1 = Integer.toString (scoreP1);
    String score2 = Integer.toString (scoreP2);
    
    //boundaries
    private static final int right_out = 390;
    private static final int left_out = 10;
    private static final int down_out = 290;
    private static final int up_out = 10;
    
    //ball radius
    private static final int radius = 10;

    //sets ball position/speed
    public PongBall (int x_pos, int y_pos)
    {
        this.x_pos = x_pos;
        this.y_pos = y_pos;
        x_speed = 2;
        y_speed = 2;

    }

    //moves ball and checks if the ball is out of bounds
    public void move ()
    {
        x_pos += x_speed;
        y_pos += y_speed;

        isBallOut ();
    }

    //Checks to see if ball hits a side, and then bounces it back if it hits the top
    // or resets and adds the score if it hits the sides

    public void isBallOut ()
    {
        //checks the direction of ball
        if (x_speed < 0)
        {
            //checks to see if the ball is out
            if (x_pos < left_out)
            {


                x_pos = 200;
                y_pos = 150;
                scoreP2 += 1;
                //changes the int score to a string
                score2 = Integer.toString (scoreP2);


            }
        }
        
        //the folowing ifs are similar as above
        else if (x_speed > 0)
        {
            if (x_pos > right_out)
            {


                x_pos = 200;
                y_pos = 150;
                scoreP1 += 1;
                score1 = Integer.toString (scoreP1);
            }
        }


        if (y_speed < 0)
        {
            if (y_pos < up_out)
            {
                //changes the direction of the ball
                y_speed = -y_speed;
            }
        }

        else if (y_speed > 0)
        {
            if (y_pos > down_out)
            {
                //changes direction
                y_speed = -y_speed;
            }
        }
    }

    //The test for collision construct was taken from a tutorial on the given site
    //Tests the collision of the ball with paddle 2
    public void testForCollisionPlayer2 (Paddle player2)
    {
        //sets the position of the sides of the ball
        ball_top = y_pos - radius;
        ball_bottom = y_pos + radius;
        ball_left = x_pos - radius;
        ball_right = x_pos + radius;

        //gets the position of the paddle
        player_top2 = player2.getYPos ();
        player_bottom2 = player2.getYPos () + player2.getYSize ();
        player_right2 = player2.getXPos () + player2.getXSize ();
        player_left2 = player2.getXPos ();
        
        //Test if the y position of the ball and the paddle matches
        if ((ball_top >= player_top2 - radius) && (ball_bottom <= player_bottom2 + radius))
         

            {
                //tests if the x position of the ball and the paddle matches
                if (ball_right >= player_left2)
                {
                
                    //Changes the direction of the ball
                    x_speed = -x_speed;
                }
            }
    }

//Same as about for paddle 1
    public void testForCollisionPlayer1 (Paddle player1)
    {
        ball_top = y_pos - radius;
        ball_bottom = y_pos + radius;
        ball_left = x_pos - radius;
        ball_right = x_pos + radius;


        player_top1 = player1.getYPos ();
        player_bottom1 = player1.getYPos () + player1.getYSize ();
        player_right1 = player1.getXPos () + player1.getXSize ();
        player_left1 = player1.getXPos ();

        if ((ball_top >= player_top1 - radius) && (ball_bottom <= player_bottom1 + radius))

            {

                if (ball_left <= player_right1)
                {


                    x_speed = -x_speed;
                }
            }
    }

    //returns speed
    public int getXSpeed ()
    {
        return x_speed;
    }

    //returns player1 score
    public int getScore1 ()
    {
        return scoreP1;
    }

    //returns player2 score
    public int getScore2 ()
    {
        return scoreP2;
    }

    //returns y position of ball
    public int getYPos ()
    {
        return y_pos;
    }


    public void paint (Graphics g)
    {
        //puts score on the screen
        g.setColor (Color.yellow);
        g.drawString (score1, 50, 50);
        g.drawString (score2, 325, 50);
        //put ball on the screen
        g.setColor (Color.green);
        g.fillOval (x_pos - radius, y_pos - radius, 2 * radius, 2 * radius);
        //ends game if player reaches 10
        if (scoreP1 == 10)
        {
            g.setColor (Color.red);
            g.drawString ("Player 1 Wins!", 150, 75);
        }
        if (scoreP2 == 10)
        {
            g.setColor (Color.red);
            g.drawString ("Player 2 Wins!", 150, 75);
        }
    }
}