package oving7.train;

/**
 * One of two different types of train cars, both specialized versions for different purposes. A
 * {@code PassengerCar} represents a passenger car that transports passengers.
 * 
 * @see TrainCar
 * @see CargoCar
 */
public class PassengerCar extends TrainCar {

    private int passengerCount;

    /**
     * Constructor for the passenger car.
     * 
     * @param deadWeight the weight of an empty passenger car
     * @param passengerCount the number of passengers in the passenger car
     * @throws IllegalArgumentException if either deadWeight or passengerCount is negative
     * 
     * @see PassengerCarTest#testWeight()
     */
    public PassengerCar(int deadWeight, int passengerCount) {
	this.passengerCount = passengerCount;
        super(deadWeight);
    }

    /**
     * @return the number of passengers in the passenger car
     * 
     * @see PassengerCarTest#testWeight()
     */
    public int getPassengerCount() {
        return passengerCount;
    }

    /**
     * @param passengerCount the number of passengers in the passenger car
     * @throws IllegalArgumentException if passengerCount is negative
     * 
     * @see PassengerCarTest#testWeight()
     */
    public void setPassengerCount(int passengerCount) {
	if (passengerCount < 0) {
	    throw new IllegalArgumentException("passenger count cannot be less than zero");
	}
	this.passengerCount = passengerCount;
    }

    @Override
    public int getTotalWeight() {
        // To calculate the total weight of the passenger car, you can assume that an average
        // passenger weighs 80 kg
        return super.getDeadWeight() + passengerCount * 80;
    }

    @Override
    public String toString() {
        return "PassengerCar";
    }

    public static void main(String[] args) {

    }
}