/**
 * This class represents a customer.
 *
 * @author Franck van Breugel
 */
public class Customer extends Thread {
    private int id;
    private WaitingRoom room;
    private Barber barber;

    /**
     * Initializes this customer with the given id, waiting room and barber.
     *
     * @param id the id of this customer.
     * @param room the waiting room of the barber of this customer.
     * @param barber the barber of this customer.
     */
    public Customer(int id, WaitingRoom room, Barber barber) {
	this.id = id;
	this.room = room;
	this.barber = barber;
    }

    /**
     * A day of a customer.
     */
    public void run() {
	final int MILLISECONDS_PER_SECOND = 1000;
	try {
	    this.sleep((long) (Math.random() * MILLISECONDS_PER_SECOND));
	} catch (InterruptedException e) {}

	// enters 
	if (this.room.enter(id)) {
	    // wakes up the barber if asleep
	    this.barber.wake();
	    // waits
	    this.room.wait(id);
	    // leaves
	    this.room.leave(id);
	}
    }
}