/*
 Name: Samuel Barnes
 Due: October 1, 2018
 Title: thimblerig
 Description: Which cup has the ball? Pay close attention! They move quickly...
 */


// cup 1 (position, speed)
int cup1_X = (int) random(50, 350);
int cup1_Y = (int) random(50, 350);
int cup1_XSpeed = (int) random(1, 11);
int cup1_YSpeed = (int) random(1, 11);

// cup 2 (position, speed)
int cup2_X = (int) random(50, 350);
int cup2_Y = (int) random(50, 350);
int cup2_XSpeed = (int) random(1, 11);
int cup2_YSpeed = (int) random(1, 11);

// cup 3 (position, speed)
int cup3_X = (int) random(50, 350);
int cup3_Y = (int) random(50, 350);
int cup3_XSpeed = (int) random(1, 11);
int cup3_YSpeed = (int) random(1, 11);

// determines stage of game (0, 1, or 2)
int stage = 0; 

// increases by 1 for every frame that cups are shuffled
int stage1_Timer = 0;

// true when player finishes game
boolean gameOver = false; 

// determines visibility of ball
int ballAlpha = 255;


void setup()
{
  // 400 by 400 pixels
  size(400, 400);

  // 60 frames per second
  frameRate(60);

  // print instructions for stage 0
  println("When you're ready, press z and I'll shuffle the cups. Whatch the ball carefully!");
}


void draw()
{
  // STAGE 0
  if (stage == 0)
  {
    // when player presses z, advance to stage 1
    if (key == 'z')
    {
      stage = 1;
    }
  }
  // STAGE 1
  else if (stage == 1)
  {
    // update position of cups
    cup1_X += cup1_XSpeed;
    cup1_Y += cup1_YSpeed;
    cup2_X += cup2_XSpeed;
    cup2_Y += cup2_YSpeed;
    cup3_X += cup3_XSpeed;
    cup3_Y += cup3_YSpeed;
    
    // if cups move off screen, reverse speed
    if (xOffScreen(cup1_X)) cup1_XSpeed *= -1;
    if (yOffScreen(cup1_Y)) cup1_YSpeed *= -1;
    if (xOffScreen(cup2_X)) cup2_XSpeed *= -1;
    if (yOffScreen(cup2_Y)) cup2_YSpeed *= -1;
    if (xOffScreen(cup3_X)) cup3_XSpeed *= -1;
    if (yOffScreen(cup3_Y)) cup3_YSpeed *= -1;

    // if ball is visible, decrease visibility
    if (ballAlpha > 0) ballAlpha--;

    // after 20 seconds, advance to stage 2
    stage1_Timer++;
    if (stage1_Timer >= 20 * (int) frameRate)
    {
      // print instructions for stage 2
      println("Select a cup with the mouse. Which do you think has the ball?");
      
      // advance to stage 2
      stage = 2;
    }
  }
  // STAGE 2
  else if (stage == 2)
  {
    // if player presses mouse, determine outcome
    if (mousePressed && gameOver == false)
    {
      // reveal ball's location
      ballAlpha = 255;
      
      // end the game
      gameOver = true;
      
      // print outcome for player
      if (mouseX > cup1_X - 20 && mouseX < cup1_X + 20 && mouseY > cup1_Y - 20 && mouseY < cup1_Y + 20) println("You guessed correctly! Press x to play again.");
      else println("That's incorrect. Press x to play again.");
    }

    // if the player presses x, restart the game
    if (key == 'x' && gameOver)
    {
      // reset variables for next game
      cup1_X = (int) random(50, 350);
      cup1_Y = (int) random(50, 350);
      cup1_XSpeed = (int) random(1, 11);
      cup1_YSpeed = (int) random(1, 11);
      cup2_X = (int) random(50, 350);
      cup2_Y = (int) random(50, 350);
      cup2_XSpeed = (int) random(1, 11);
      cup2_YSpeed = (int) random(1, 11);
      cup3_X = (int) random(50, 350);
      cup3_Y = (int) random(50, 350);
      cup3_XSpeed = (int) random(1, 11);
      cup3_YSpeed = (int) random(1, 11);
      stage1_Timer = 0;
      gameOver = false;

      // print instructions for stage 0
      println("");
      println("- - - - - - - - - -");
      println("");
      println("When you're ready, press z and I'll shuffle the cups. Whatch the ball carefully!");

      // return to stage 0
      stage = 0;
    }
  }

  // draw background
  background(0);
  drawTiles();

  // draw cups
  drawCup(cup1_X, cup1_Y);
  drawCup(cup2_X, cup2_Y);
  drawCup(cup3_X, cup3_Y);

  // draw ball
  drawBall(cup1_X, cup1_Y, ballAlpha);
}


// return true if x coordinate off screen
boolean xOffScreen(int x)
{
  if (x > width - 20 || x < 0 + 20) return true;
  else return false;
}


// return true if y coordinate off screen
boolean yOffScreen(int y)
{
  if (y > height - 20 || y < 0 + 20) return true;
  else return false;
}


void drawTiles()
{
  boolean toggleTile = false;
  background(64, 66, 141);
  rectMode(CORNER);
  noStroke();
  fill(48, 50, 110);
  for (int x = 0; x < width; x += 10)
  {
    toggleTile = !toggleTile;
    for (int y = 0; y < height; y += 10)
    {
      toggleTile = !toggleTile;
      if (toggleTile == true) rect(x, y, 10, 10);
    }
  }
}


void drawCup(int x, int y)
{
  rectMode(CENTER);
  noStroke();
  fill(220, 20, 60);
  rect(x, y, 40, 40);
}


void drawBall(int x, int y, int alpha)
{
  ellipseMode(CENTER);
  noStroke();
  fill(50, 205, 50, alpha);
  ellipse(x, y, 10, 10);
}