//package triangles;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

/**
 * Class SierpinskiStarterCode is a demo for this assignment.
 */
public class recursive {
	static double area;
	static Graphics2D graphics;

	/**
	 * Writes a sample image to file "sierpinski-demo.png"
	 *
	 * @param args unused
	 */
	public static void main(String[] args) {
		int width = Integer.parseInt(args[0]);
		int height = Integer.parseInt(args[1]);
		area = Double.parseDouble(args[2]);

		Color x = Color.decode(args[3]);
		int red = 255 - x.getRed();
		int green = 255 - x.getGreen();
		int blue = 255 - x.getBlue();
		Color background = new Color(red, green, blue);

		// A 320x240-pixel RGB image
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		// Graphics2D is our "drawing" class
		graphics = image.createGraphics();
		// Any clearing operations will use a yellow color
		graphics.setBackground(background);
		// Clear the image to the background color
		graphics.clearRect(0, 0, image.getWidth(), image.getHeight());
		// Any drawing operations will use a blue color
		graphics.setColor(x);
		// Draw a line from the top (width/2, 0) to the lower-right corner (width - 1,
		// height - 1):
		// graphics.drawLine(width/2, 0, image.getWidth() - 1, image.getHeight() - 1);
		// Draw a line from the lower-left corner (0, height - 1) to the top (width/2,
		// 0):
		// graphics.drawLine(0, image.getHeight() - 1, width/2, 0);
		// Draw a line from the Lower-left corner to the lower-right corner
		// graphics.drawLine(0, height - 1, width - 1, height -1);
		fractal((width / 2.0), 0.0, 0.0, (height - 1.0), (width - 1.0), (height - 1.0));
		// Save the image as a PNG file named "sierpinski-demo.png"
		try {
			ImageIO.write(image, "png", new File(args[4]));
		} catch (Exception e) {
			System.err.println("Unable to write image file!: " + e.getMessage());
		}
	}

	static void fractal(double topx, double topy, double leftx, double lefty, double rightx, double righty) {

		double base = rightx - leftx;
		double height = lefty - topy;
		if ((base * height) / 2 < area) {
			return;
		}
		graphics.drawLine((int) Math.round(topx), (int) Math.round(topy), (int) Math.round(leftx),
				(int) Math.round(lefty));
		graphics.drawLine((int) Math.round(leftx), (int) (int) Math.round(lefty), (int) (int) Math.round(rightx),
				(int) Math.round(righty));
		graphics.drawLine((int) Math.round(rightx), (int) Math.round(righty), (int) Math.round(topx),
				(int) Math.round(topy));
		fractal(topx, topy, (topx + leftx) / 2, (topy + lefty) / 2, ((topx + rightx) / 2), (topy + righty) / 2);
		fractal((topx + leftx) / 2, (topy + lefty) / 2, leftx, lefty, (leftx + rightx) / 2, (lefty + righty) / 2);
		fractal((topx + rightx) / 2, (topy + righty) / 2, (leftx + rightx) / 2, (lefty + righty) / 2, rightx, righty);

	}
}