// Use the UW graphics library
import uwcse.graphics.*;

/**
 * A class to draw shapes made of squares
 * 
 * @author your name here
 */

public class DrawingWithSquares {
	// Use a Pen to draw
	private Pen pen = new Pen();

	// Do we need a constructor?

	/**
	 * Draw a square of side length size and rotated by angle
	 * <p>
	 * The center of the square is the home position of the pen
	 * 
	 * @param size
	 *            the length of the side of the square (in pixels)
	 * @param angle
	 *            the angle of rotation of the square (counted counterclockwise)
	 */
	public void drawSquare(int size, int angle) {
		// Bring the pen to the home position (=center of the square)
		pen.home();
		pen.up();
		// Bring the pen on the upper right corner of the square
		pen.turn(45 + angle);
		pen.move((int) Math.sqrt(size * size / 2.));
		pen.turn(135);

		// Start drawing
		pen.down();
		// top side
		pen.move(size);
		// left side
		pen.turn(90);
		pen.move(size);
		// bottom side
		pen.turn(90);
		pen.move(size);
		// right side
		pen.turn(90);
		pen.move(size);
	}

	/**
	 * Draw a set of 9 rotated squares. The first square is drawn with a 0
	 * degree angle, the second with a 10 degree angle, the third with a 30
	 * degree angle, etc...
	 * 
	 * @param size
	 *            the length of the side of the squares (in pixels)
	 */
	public void drawSquarePattern(int size) {
		drawSquare(size, 0);
		drawSquare(size, 10);
		drawSquare(size, 20);
		drawSquare(size, 30);
		drawSquare(size, 40);
		drawSquare(size, 50);
		drawSquare(size, 60);
		drawSquare(size, 70);
		drawSquare(size, 80);
	}

	/**
	 * Draw 8 sets of rotated squares, varying in size from 25 to 200 in
	 * increments of 25
	 */
	public void drawSquarePatterns() {
		drawSquarePattern(200);
		drawSquarePattern(175);
		drawSquarePattern(150);
		drawSquarePattern(125);
		drawSquarePattern(100);
		drawSquarePattern(75);
		drawSquarePattern(50);
		drawSquarePattern(25);
	}

	/** Clear the screen */
	public void clearScreen() {
		pen.erase();
	}

	/**
	 * Entry point of the program
	 */
	public static void main(String[] args) {
		DrawingWithSquares dws = new DrawingWithSquares();
		// type here the actions that you want to test e.g.
		dws.drawSquarePatterns();
	}

}