Battery.java

package nl.tudelft.bw4t.server.model.robots;

/**
 * Represents the robot's battery.
 */
public class Battery {
	/**
	 * A battery has a max capacity.
	 */
	private int max;

	/**
	 * A battery has a current capacity.
	 */
	private double current;

	/**
	 * A battery has a discharge rate, which represents how much the battery
	 * decreases per tick.
	 */
	private double dRate;

	/**
	 * Create a fully charged battery.
	 * 
	 * @param maxCharge
	 *            the max capacity of the battery
	 * @param dischargeRate
	 *            the discharge rate per move
	 */
	public Battery(int maxCharge, double dischargeRate) {
		this.max = maxCharge;
		this.current = maxCharge;
		this.dRate = dischargeRate;
	}

	/**
	 * Create a new Battery with the given configuration.
	 * 
	 * @param maxCharge
	 *            The max. capacity of the battery.
	 * @param currentCharge
	 *            The current amount of energy left.
	 * @param dischargeRate
	 *            The discharge rate.
	 */
	public Battery(int maxCharge, double currentCharge, double dischargeRate) {
		this.max = maxCharge;
		this.current = currentCharge;
		this.dRate = dischargeRate;
	}

	public double getCurrentCapacity() {
		return this.current;
	}

	public double getDischargeRate() {
		return this.dRate;
	}

	/**
	 * Returns percentage.
	 * 
	 * @return the percentage of battery power left.
	 */
	public double getPercentage() {
		return (this.current * 100.0) / this.max;
	}

	/**
	 * If the charging of the battery exceeds the max capacity, the current
	 * capacity is set to the max capacity.
	 */
	public void recharge() {
		this.current = this.max;
	}

	/**
	 * If the battery is infinite, DO NOT DISCHARGE IT. If the emptying of the
	 * battery falls below 0, the current capacity is set to 0.
	 */
	public void discharge() {
		if (this.max != Integer.MAX_VALUE) {
			double temp = this.current - this.dRate;

			if (temp < 0) {
				this.current = 0;
			} else {
				this.current = temp;
			}
		}
	}
}