//GLOBAL VARIABLES
PFont font;

int rightBatYPos = 245;
int leftBatYPos = mouseY;

float ballXPos = 245;
float ballYPos = 245;

float ballYVelocity = -1;
float ballXVelocity = -3;

int player1 = 0;
int player2 = 0;

void setup() {
  font = loadFont("ArialMT-48.vlw");
  textFont(font, 25);
  fill(#FFFFFF);
  size(500,500);
  ellipseMode(RADIUS);
  smooth();
}

void draw() {
  text(player1, 20, 30);
  background(0);
  leftBat();
  rightBat();
  moveBall();
  offScreen();
  rightBatHit();
  leftBatHit();
  rightBatMissTopFix();
  leftBatMissTopFix();
  diag();  
  player1Win();
  player2Win();
}

//LEFT BAT
void leftBat() {
  rect(30,mouseY-20,5,40);
  text(player1, 20, 30);
}

//RIGHT BAT
void rightBat() {
  rect(width-30,rightBatYPos,5,40);
  text(player2, width-23, 30);
}

void keyPressed() {
  if (keyCode == UP) {
    rightBatYPos -= 15;
  }
  if (keyCode == DOWN) {
    rightBatYPos += 15;
  }
}

//BALL
void moveBall() {
  ballXPos += ballXVelocity;
  ballYPos += ballYVelocity;
  ellipse(ballXPos, ballYPos, 5, 5);
}

//OFF SCREEN
void offScreen() {
  if (ballXPos > width) {
    ballXVelocity = -ballXVelocity;
  }

  if (ballXPos < 0) {
    ballXVelocity = -ballXVelocity;
  }

}

//BAT HIT
void rightBatHit() {
  if ((ballXPos > width-35) && (ballYPos <= rightBatYPos+40)) {
    ballXVelocity = -ballXVelocity;
  }
}

//RIGHT BAT FIX - So ball reaches width above bat
void rightBatMissTopFix() {
  if ((ballXPos > width-35) && (ballYPos < rightBatYPos)) {
    ballXVelocity = -ballXVelocity;
  }
}

void leftBatHit() {
  if ((ballXPos < 35) && (ballYPos <= mouseY+20)) {
    ballXVelocity = -ballXVelocity;
  }
}

//LEFT BAT FIX - So ball reaches width above bat
void leftBatMissTopFix() {
  if ((ballXPos < 35) && (ballYPos < mouseY-20)) {
    ballXVelocity = -ballXVelocity;
  }
}

//DIAGONAL
void diag() {   
  if (ballYPos > height) {
    ballYVelocity = -ballYVelocity;
  }

  if (ballYPos < height-height) {
    ballYVelocity = -ballYVelocity;
  }
}

//SCORING
void player1Win() {   
  if (ballXPos > width) {
    player1 += 1;
    print("PLAYER 1: ");
    println(player1);
    //delay(1000);
  }
}

void player2Win() {
  if (ballXPos < 0) {
    player2 += 1;
    print("PLAYER 2: ");
    println(player2);
    //delay(1000);    
  }
}