//pong game was created by joel comeau 7873238 for assingment 2 of comp 1010


 int x; //x coordinate
 int y; //y coordinate
 int w; //width
 int h; //height
 int speedX; //speed variables
 int speedY;
 int paddleXL;//padle variables
 int paddleYL;
 int paddleWidth;
 int paddleHeight;
 int paddleSpeed;
 int paddleXR;
 int  paddleYR;
 boolean downL;
 boolean downR;
 boolean upL;
 boolean upR;
//color for the paddles

int paddleColorR = color (0,40,255);
int paddleColorL = color (0,40,255);
//score
int scoreL = 0;
int scoreR = 0;
//final win score
int winScore = 10;

//Sets the game and window size up, along with the background and other important things
//happens only once; at the beginning of the game

void setup() {
  //this sets the window size
  size(650,500);
  //the x,y,w,h get the ball to begin at the center of the game
  x = width/2;
  y = height/2;
  w = 35;
  h = 35;
  //this allows the ball to bounce
  speedX = 2;
  speedY = 2;
  //this creates a text
  textSize(30);
  textAlign(CENTER, CENTER); //this centers the height and width of the text
  rectMode(CENTER); //this allows both paddles to be centered
  //This sets the paddles to a certain place on the window, and makes them visible
  paddleXL = 20;
  paddleYL = height/2;
  paddleXR = width-40;
  paddleYR = height/2;
  paddleWidth = 15;
  paddleHeight = 100;
  paddleSpeed = 5;

}

//Draws the canvas for the game

void draw() {
  background(0,22,139);
  drawCircle();
  moveCircle();
  bounceOff();
  drawPaddles();
  movePaddle();
  restrictPaddle();
  contactPaddle();
  drawScore();
  gameOver();
}

 void drawScore() {
 textSize(20);
 fill (255);
 String toPrint = "PLAYER 2: "+scoreR;text(toPrint, width/4-textWidth(toPrint)/2, 50);
 toPrint = "PLAYER 1: "+scoreL;
 text(toPrint, width*3/4-textWidth(toPrint)/2, 50);

 }

//creates paddles

void drawPaddles() {
  //left paddle
  fill(paddleColorL);
  rect(paddleXL, paddleYL, paddleWidth, paddleHeight);
 //right paddle
  fill(paddleColorR);
  rect(paddleXR, paddleYR, paddleWidth, paddleHeight);
}

//Moves the paddles

void movePaddle() {

  if (downL) {
    paddleYL = paddleYL + paddleSpeed;
  }
  if (upL) {
    paddleYL = paddleYL - paddleSpeed;
  }
  if (downR) {
    paddleYR = paddleYR + paddleSpeed;
  }
  if (upR) {
    paddleYR = paddleYR - paddleSpeed;
  }
}

//detects when a paddle has hit the wall

void restrictPaddle() {
  if (paddleYL - paddleHeight/2 < 0) {
    paddleYL = paddleYL + paddleSpeed;
  }
  if (paddleYL + paddleHeight/2 > height) {
    paddleYL = paddleYL - paddleSpeed;
  }
  if (paddleYR - paddleHeight/2 < 0) {
    paddleYR = paddleYR + paddleSpeed;
  }
  if (paddleYR + paddleHeight/2 > height) {
    paddleYR = paddleYR - paddleSpeed;
  }
}

//This detects left and right collision; respectively

void contactPaddle() {
  if (x - w/2 < paddleXL + paddleWidth/2 && y - h/2 < paddleYL + paddleHeight/2 && y + h/2 > paddleYL - paddleHeight/2 ) {
    if (speedX < 0) {
      speedX = -speedX*1;
    }
  }
  else if (x + w/2 > paddleXR - paddleWidth/2 && y - h/2 < paddleYR + paddleHeight/2 && y + h/2 > paddleYR - paddleHeight/2 ) {
    if (speedX > 0) {
      speedX = -speedX*1;
    }
  }
}

//creates circle
void drawCircle() {
  fill(255);
  ellipse(x, y, w, h);
}
//this allows the circle to bounce
void moveCircle() {
  x = x + speedX*2;
  y = y + speedY*2;
}

//This detects if the ball has bounced or not

void bounceOff() {
 if ( x > width - w/2) {
    setup();
    speedX = -speedX;
    scoreL = scoreL + 1;
  } else if ( x < 0 + w/2) {
    setup();
    scoreR = scoreR + 1;
  }
  if ( y > height - h/2) {
    speedY = -speedY;
  } else if ( y < 0 + h/2) {
    speedY = -speedY;
  }
}


//This determines who wins

void gameOver() {
  if(scoreL == winScore) {
    gameOverPage("PLAYER 1 wins!", paddleColorL);
  }
  if(scoreR == winScore) {
    gameOverPage("PLAYER 2 wins!", paddleColorR);
  }
}

//This stops the ball from bouncing around, gets the user to know that the game is over

void gameOverPage(String text, color c) {
  speedX = 0;
  speedY = 0;
  fill(255);
  text("Game over", width/2, height/3 - 40);
  text("Click to play again", width/2, height/3 + 40);
  fill(c);
  text(text, width/2, height/3);
  //this gets the user to click on the screen to play again
  if(mousePressed) {
  //this sets the score to zero
    scoreR = 0;
    scoreL = 0;
    //this gets the speed to a 1
    speedX = 1;
    speedY = 1;
  }
}

//this gets the user to press a key and allow the paddle(s) to move
 //the second set assumes if caps lock is on for s and w
void keyPressed() {
if (key == 'w' || key == 'W') {
    upL = true;
  }
  if (key == 's' || key == 'S') {
    downL = true;
  }
  if (keyCode == UP) {
    upR = true;
  }
  if (keyCode == DOWN) {
    downR = true;
  }
}

//this creates a false key interaction

void keyReleased() {
  if (key == 'w' || key == 'W') {
    upL = false;
  }
  if (key == 's' || key == 'S') {
    downL = false;
  }
  if (keyCode == UP) {
    upR = false;
  }
  if (keyCode == DOWN) {
    downR = false;
  }
}