/**
 * The customore definition for the Bank Simulator. 
 * Customers note the time that they came into the bank and
 * they know the complexity of their transaction
 * @author gtowell
 * Created: Jan 3 2020
 */
public class Customer {
    /** The time the customer's transaction will take */
    private int timeForTransaction;
    /** Timestamp of whent eh customer got into line */
    private long arrivalTime;
    /** Timestanp of when the customer finished */
    private long completionTime;

    /**
     * Create a customer
     * @param ttime the length of time their transaction will take.
     */
    public Customer(int ttime)
    {
        arrivalTime = System.nanoTime();
        timeForTransaction = ttime;
    }

    /** 
     * Accessor for the transaction time
     * @return the time required for the transaction
     */
    public int transactionLength()
    {
        return timeForTransaction;
    }

    /** 
     * Indicate that the transaction has been completed
     */
    public void completed()
    {
        completionTime = System.nanoTime();
    }

    /**
     * The time the customer was in the bank
     * @return the time the customer was in the bank
     */
    public double waitTime()
    {
        return (completionTime-arrivalTime) / 100000000.0;
    }
}