/*******************************************************************************
 * Copyright (c) 2001, 2008 Mathew A. Nelson and Robocode contributors
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://robocode.sourceforge.net/license/cpl-v10.html
 *
 * Contributors:
 *     Mathew A. Nelson
 *     - Initial implementation
 *     Flemming N. Larsen
 *     - Maintainance
 *******************************************************************************/
package sample;


import robocode.HitByBulletEvent;
import robocode.HitRobotEvent;
import robocode.Robot;
import robocode.ScannedRobotEvent;

import java.awt.*;


/**
 * Fire - a sample robot by Mathew Nelson, and maintained by Flemming N. Larsen
 * <p/>
 * Sits still.  Spins gun around.  Moves when hit.
 */
public class Fire extends Robot {
	int dist = 50; // distance to move when we're hit

	/**
	 * run:  Fire's main run function
	 */
	public void run() {
		// Set colors
		setBodyColor(Color.orange);
		setGunColor(Color.orange);
		setRadarColor(Color.red);
		setScanColor(Color.red);
		setBulletColor(Color.red);

		// Spin the gun around slowly... forever
		while (true) {
			turnGunRight(5);
		}
	}

	/**
	 * onScannedRobot:  Fire!
	 */
	public void onScannedRobot(ScannedRobotEvent e) {
		// If the other robot is close by, and we have plenty of life,
		// fire hard!
		if (e.getDistance() < 50 && getEnergy() > 50) {
			fire(3);
		} // otherwise, fire 1.
		else {
			fire(1);
		}
		// Call scan again, before we turn the gun
		scan();
	}

	/**
	 * onHitByBullet:  Turn perpendicular to the bullet, and move a bit.
	 */
	public void onHitByBullet(HitByBulletEvent e) {
		turnRight(normalRelativeAngle(90 - (getHeading() - e.getHeading())));

		ahead(dist);
		dist *= -1;
		scan();
	}

	/**
	 * onHitRobot:  Aim at it.  Fire Hard!
	 */
	public void onHitRobot(HitRobotEvent e) {
		double turnGunAmt = normalRelativeAngle(e.getBearing() + getHeading() - getGunHeading());

		turnGunRight(turnGunAmt);
		fire(3);
	}

	/**
	 * normalRelativeAngle:  Returns angle such that -180 < angle <= 180
	 */
	public double normalRelativeAngle(double angle) {
		if (angle > -180 && angle <= 180) {
			return angle;
		}
		double fixedAngle = angle;

		while (fixedAngle <= -180) {
			fixedAngle += 360;
		}
		while (fixedAngle > 180) {
			fixedAngle -= 360;
		}
		return fixedAngle;
	}
}
