/**
 * TicketMachine models a ticket machine that issues
 * flat-fare tickets.
 * The price of a ticket is specified via the constructor.
 * It is a naive machine in the sense that it trusts its
 * users to insert enough money before trying to print a ticket.
 * It also assumes that users enter sensible amounts.
 *
 * @author David J. Barnes and Michael Koelling, Rachel Cardell-Oliver
 * @version 2008.03.30
 */
public class TicketMachine
{
    // The price of a ticket from this machine.
    private int price;
    // The amount of money entered by a customer so far.
    private int balance;
    // The total amount of money collected by this machine.
    private int total;

    /**
     * Create a machine that issues tickets of the given price.
     * Note that the price must be greater than zero, and there
     * are no checks to ensure this.
     */
    public TicketMachine(int ticketCost) {
        price = ticketCost;
        balance = 0;
        total = 0;
    }

    /**
     * Return the price of a ticket.
     */
    public int getPrice() {
        return price;
    }

    /**
     * Return the amount of money already inserted for the
     * next ticket.
     */
    public int getBalance() {
        return balance;
    }

    /**
     * Receive an amount of money from a customer.
     */
    public void insertMoney(int amount) {
        balance = balance + amount;
    }

    /**
     * Return the total amount of money collected by this machine
     * Note this does not include the current balance since that is not ours yet
     * but you could interpret the total as total+balance.  But the returned value may not match the field value.
     */
    public int getTotal() {
        return total; 
    }

    public int calculateChange() {
      return (balance - price);
    }

    /**
     * Print a ticket.
     * Update the total collected and
     * reduce the balance to zero.
     */
    public void printTicket() {
        if (calculateChange() >= 0) {
            // Simulate the printing of a ticket.
            System.out.println("##################");
            System.out.println("# The BlueJ Line");
            System.out.println("# Ticket");
            System.out.println("# " + price + " cents.");
            System.out.println("##################");
            System.out.println();

            // Update the total collected with the price of the ticket
            total = total + price; 
            // Clear the balance
            balance = 0;
        } else {
            System.out.println("Please insert more money to cover ticket price of " + price + " cents");
        }
    }

}