/*
 * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
 * Date: 2022-04-24
 * Description: Train class inherited from Vehicle class
 */

public class Train extends Vehicle {
	/**
	 * Constructor.
	 *
	 * @param speedLimit the speed limit of the train
	 * @param speed the speed of the train
	 * @throws BadSpeedSetting
	 */
	public Train(int speedLimit, int speed) throws BadSpeedSetting {
		super(speedLimit, speed);
	}

	/**
	 * Train can not fly.
	 *
	 * @return false
	 */
	@Override
	public boolean canFly() {
		return false;
	}

	/**
	 * Tain speed can not be changed.
	 *
	 * @throws TrainSpeedChange
	 */
	@Override
	public int accelerate(int amount) throws TrainSpeedChange {
		throw new TrainSpeedChange("Do not try to accelerate or decelerate the train!");
	}

	/**
	 * Test.
	 */
	public static void testTrain() {
		try {
			Train train;
			try {
				train = new Train(-1, -1);
			} catch (BadSpeedSetting e) {
				System.out.println(e.getMessage().equals("Speed cannot be negative!"));
			}
			try {
				train = new Train(100, -1);
			} catch (BadSpeedSetting e) {
				System.out.println(e.getMessage().equals("Speed cannot be negative!"));
			}
			try {
				train = new Train(100, 101);
			} catch (BadSpeedSetting e) {
				System.out.println(e.getMessage().equals("Speed cannot be greater than speed limit!"));
			}
			train = new Train(100, 50);
			System.out.println(train.getSpeed() == 50);
			try {
				train.accelerate(1);
			} catch (TrainSpeedChange e) {
				System.out.println(e.getMessage().equals("Do not try to accelerate or decelerate the train!"));
			}
		} catch (Exception e) {
			System.out.println("Error: uncaught exception " + e.getClass() + ": " + e.getMessage());
		}
	}
}