// LollipopTurtle.java
// A subclass of Turtle with the ability
// to draw lollipops

import java.awt.Color;
import java.util.Random;

public class LollipopTurtle extends Turtle {
  
  // constants
  private static final double START_LENGTH = 20;
  private static final int START_LEVELS = 50;
  private static final int ANGLE = 30;
  private static final double SHRINK_FACTOR = 0.95;
  private static final int STICK_LENGTH = 150;
  
  // this is an array of Color objects that we
  // immediately initialize to the 7 colors of the rainbow
  private static final Color[] rainbowColors = {
    Color.red, Color.orange, Color.yellow, Color.green, 
    Color.blue, new Color(75, 0, 130), new Color(148, 0, 211) } ;
  
  // instance variable
  private Random rnd = new Random();
  
  // constructor
  public LollipopTurtle () {
    // pick a random heading (in degrees)
    setHeading(rnd.nextInt(360));
    // pick a random color of the ones in the rainbowColors array
    setColor(rainbowColors[rnd.nextInt(rainbowColors.length)]);
  }

  // draw a spiral lollipop
  public void drawLollipop() {
    forward(STICK_LENGTH);
    right(75);
    drawSpiral(START_LENGTH, START_LEVELS);
  }
  
  // draw a spiral 
  public void drawSpiral(double sideLength, int levels) {
    if (levels > 0) {
      forward(sideLength);
      left(ANGLE);
      drawSpiral(sideLength * SHRINK_FACTOR, levels-1);
    }
  }
}