/*
    Car Wash Simulation Project:  Bay Class

    The Car Wash Simulation Project is described in 
    <a href="http://max.cs.kzoo.edu/AP/ABMaterials/Queues/CarWash/CarWashProgram.html">Car
    Wash Project Description</a>.

    Authors:   Autumn C. Spaulding and Alyce Brady,
               based on a description by
               <a href="mailto:trollend@nb.net">Todd Ollendyke</a>.
    Date:      13 July 2000
    Modified:  12 October 2000
      Added Bay class.

	Copyright 2000 Autumn C. Spaulding and Alyce Brady

	This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
*/


/**
    This class represents a car wash bay in the Car Wash program.  In particular, 
    it keeps track of when the bay is empty or, if there is a car being washed, 
    how long it will be until the bay is empty again.

*/
public class Bay
{
    int timeLeftTillEmpty;

    /** Construct a Car Wash Bay */
    public Bay ()
    {
        reset();
    }

    /** Re-initialize the bay for the start of a new run of the simulation. */
    public void reset ()
    {
        // reset bay to be empty

        /********************************************************************
         *                                                                  *
         *                Code missing:  See comments above.                *
         *                                                                  *
         ********************************************************************/
    }

    /** Is the bay empty, or is there a car in it being washed? */
    public boolean isEmpty ()
    {
        return timeLeftTillEmpty <= 0;
    }

    /** Start washing a new car.  This function sets the timer to show many
        more minutes it will take to finish washing this new car. 
    */ 
    public void startWash ()
    // pre: isEmpty()
    {
        // Car wash takes 3 minutes (current minute plus 2 more)

        /********************************************************************
         *                                                                  *
         *                Code missing:  See comments above.                *
         *                                                                  *
         ********************************************************************/
    }

    /** This function tells the bay about the passage of time as it washes
        a car.
    */
    public void keepWashing ()
    // pre: ! isEmpty()
    // post: bay is one unit of time closer to being empty
    {
        // Check that pre-condition is met to ensure that we don't go
        // into negative numbers!

        /********************************************************************
         *                                                                  *
         *                Code missing:  See comments above.                *
         *                                                                  *
         ********************************************************************/
    }

}  // end Bay class