//Liz Rossman
//Ma
//Code
///Code Sketch 9: Fix Pong!

//Pong is broken :( we must fix him/her/they!

Ball ball;
Paddle p1;
Paddle p2;

int p1Score = 0;
int p2Score = 0;

void setup() {
  size(1000, 700);
  background(255);
  noStroke();

  ball = new Ball();
  p1 = new Paddle(1);
  p2 = new Paddle(2);

  fill(255);
  rectMode(CENTER);
  textSize(80);
}

void draw() {
  background(5);

  p1.update();
  p1.display();
  p2.update();
  p2.display();
  ball.update();
  ball.display();

  text(p1Score, width/2-120, 100);
  text(p2Score, width/2+50, 100);
  rect(width/2, height/2, 20, height);
}

class Paddle {
  int player;
  int pWidth = 20;
  int pHeight = 100;
  float x;
  float y;

  Paddle(int pNum) {
    player = pNum;  //setting the which player value from the constructor value
    if (player == 1) {
      x = 30;    //set player 1 to left side of the screen
    } else if (player == 2) {
      x = width-30;  //set player 2 to right side of the screen
    }
    y = height/2;
  }

      ///PADDLE CONTROL

      void update() {
        if (player == 1) {
          if (keyPressed) {
            if (key == CODED) {
              if (keyCode == UP && y > 60) {
                y-=10;
              } else if (keyCode == DOWN && y < 640) {
                y+=10;
              }
            }
          }
        } else if (player == 2) {
          if (keyPressed) {
            if (key == CODED) {
              if (keyCode == UP && y > 60) {
                y-=10;
              } else if (keyCode == DOWN && y < 640) {
                y+=10;
              }
            }
          }
        }

        if (ball.posX > x - pWidth/2 && ball.posX < x + pWidth/2) {
          if (ball.posY > y - pHeight/2 && ball.posY < y + pHeight/2) {
            ball.contact();
          }
        }
      }

      void display() {
        rect(x, y, pWidth, pHeight);
      }
    }

    class Ball {
      float posX;
      float posY;
      float velX;
      float velY;
      float size;

      Ball() {
        posX = width/2;
        posY = height/2;

        if (int(random(2)) == 0) {
          velX = 4;
        } else {
          velX = -4;
        }
        velY = random(-4, 4);
      }

      void update() {

        ///INCREASES PLAYER SCORES
        if (posX < 0) { //if the ball goes off the left side of the screen
          p2Score++;  //increase player 1 score
          posX = width/2;
          posY = height/2;
          velX = -9;
          velY = random(-5, 5);
          fill(255, 0, 0);                                                              //MODIFICATION: if player wins background color changes
        } else if (posX > width) {
          p1Score++;  //increase player 2 score
          posX = width/2;
          posY = height/2;
          velX = 9;
          velY = random(-5, 5);
          fill(0, 0, 255);
        }


        ///BALL BOUNCE
        if (posY > height - size/2) { //bounce off the bottom
          posY = height - size/2;
          velY = -velY;
        } else if (posY < 0 + size/2) { //bounce off the top
          posY = 0 + size/2;
          velY = -velY;
        }

        posX += velX;
        posY += velY;
      }

      void display() {
        ellipse(posX, posY, 30, 30);
      }

      void contact() {  //call this function when the ball contacts the paddle
        posX = posX - velX;  //step the ball back one frame
        velX = -velX;
        velY = random(-5, 5);
      }
    }