package dot;

public class Dot {

	private double x;
	private double y;
	private double radius;
	private int r;
	private int g;
	private int b;

	/**
	 * Constructs a black dot at (0.0, 0.0) with radius 1.0
	 */
	public Dot() {
		this(0.0, 0.0, 0.0, 1, 0, 0);
	}

	/**
	 * Constructs a black dot with radius 1.0 at the given location
	 */
	public Dot(double x, double y) {
		this(x, y, 1.0, 0, 0, 0);
	}

	/**
	 * Constructs a black dot at the given location and radius
	 */
	public Dot(double x, double y, double radius) {
		this(x, y, radius, 1, 0, 0);
	}

	/**
	 * Constructs a dot at the given location and radius, and a color specified by
	 * r, g, b values.
	 */
	public Dot(double x, double y, double radius, int r, int g, int b) {
		if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255 || radius <= 0) {
			throw new IllegalArgumentException();
		}
		this.x = x;
		this.y = y;
		this.radius = radius;
		this.r = r;
		this.g = g;
		this.b = b;
	}

	/**
	 * Returns the x-coordinate
	 */
	public double getX() {
		return this.x;
	}

	/**
	 * Sets the x-coordinate
	 */
	public void setX(double x) {
		this.x = x;
	}

	/**
	 * Doubles the radius of this dot.
	 */
	public void grow() {
		this.radius *= 2;
	}

	/**
	 * Translates this dot by increasing the x- and y-coordinates by dx and dy,
	 * respectively.
	 */
	public void translate​(double dx, double dy) {
		this.x += dx;
		this.y += dy;

	}

	/**
	 * Halves the radius of this dot.
	 */
	public void shrink() {
		this.radius /= 2;
	}

	/**
	 * Gets the y-coordinate
	 */
	public double getY() {
		return this.y;
	}

	/**
	 * Sets the y-coordinate
	 */
	public void setY(double y) {
		this.y = y;
	}

	/**
	 * Gets the radius
	 */
	public double getRadius() {
		return this.radius;
	}

	/**
	 * Sets the radius to a specified value
	 */
	public void setRadius(double newRadius) {
		this.radius = newRadius;
	}

	/**
	 * Gets the red component of this dot's color
	 */
	public int getRed() {
		return this.r;
	}

	/**
	 * Gets the green component of this dot's color
	 */
	public int getGreen() {
		return this.g;
	}

	/**
	 * Returns a new dot that is halfway between this dot and the specified dot.
	 */
	public Dot getMidDot​(Dot that) {

		return new Dot((this.x + that.x) / 2, (this.y + that.y) / 2, (this.radius + that.radius) / 2,
				(this.r + that.r) / 2, (this.g + that.g) / 2, (this.b + that.b) / 2);
	}

	/**
	 * Gets the blue component of this dot's color
	 */
	public int getBlue() {
		return this.b;
	}

	/**
	 * Returns the brightness of a dot, defined by the average of the red, green,
	 * and blue components of the dot
	 */
	public int getBrightness() {
		return (this.b + this.g + this.r) / 3;
	}

	/**
	 * Returns the distance between this dot's center and a point specified by (x,
	 * y)
	 */
	public double getDistanceTo​(double x, double y) {
		return Math.sqrt(Math.pow((this.x - x), 2) + Math.pow((this.y - y), 2));
	}

	/**
	 * Returns the distance between two dots' centers
	 */
	public double getDistanceTo​(Dot that) {
		return Math.sqrt(Math.pow((this.x - that.x), 2) + Math.pow((this.y - that.y), 2));
	}

	/**
	 * Returns the distance between this dot's center and the point (0, 0)
	 */
	public double getDistanceToOrigin() {
		return Math.sqrt(Math.pow((this.x - 0), 2) + Math.pow((this.y - 0), 2));
	}

	/**
	 * Sets the color of this point.
	 */
	public void setColor​(int r, int g, int b) {
		if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255) {
			throw new IllegalArgumentException();
		}

		this.r = r;
		this.g = g;
		this.b = b;
	}

	/**
	 * Brightens this dot's color by doubling its red, green, and blue components.
	 */
	public void brighten() {
		this.r *= 2;
		this.g *= 2;
		this.b *= 2;
	}

	/**
	 * Darken this dot's color by cutting its red, green, and blue components in
	 * half.
	 */
	public void darken() {
		this.r /= 2;
		this.g /= 2;
		this.b /= 2;
	}

	/*
	 *
	 * Returns a String representation of this Dot in the form: (47.375, 18.500),
	 * radius=72.139, color=(255, 0, 0) Note that all double values are rounded to
	 * three places.
	 */
	@Override
	public String toString() {
		return "(" + x + ", " + y + "), radius=" + radius + ", color=(" + r + "," + g + "," + b + ")";
	}

}