// -------------------------------------------------------------------------
/**
 *  This class represents a single appointment that might be stored in
 *  a timetable.  The appointment consists of a time and a string
 *  description.  The time is stored as an hour number, 0-23 (military
 *  time).
 *
 *  @author  Stephen Edwards
 *  @version Feb 22, 2013
 */
public class Appointment
{
    //~ Instance/static variables .............................................

    private int    hour;
    private String description;


    //~ Constructor ...........................................................

    // ----------------------------------------------------------
    /**
     * Creates a new Appointment object.
     * @param anHour the time for this appointment (0-23, military time)
     * @param aDescription the description of this appointment
     */
    public Appointment(int anHour, String aDescription)
    {
        hour = anHour;
        description = aDescription;
    }


    //~ Methods ...............................................................

    // ----------------------------------------------------------
    /**
     * Getter for the appointment's description property.
     * @return  the appointment's description
     */
    public String description()
    {
        return description;
    }


    // ----------------------------------------------------------
    /**
     * Getter for the appointment's hour property.
     * @return the appointment's hour (time) as an integer (0-23,
     *         military time)
     */
    public int hour()
    {
        return hour;
    }


    // ----------------------------------------------------------
    /**
     * Setter for the appointment's description property.
     * @param newDescription the new description for this appointment
     */
    public void setDescription(String newDescription)
    {
        description = newDescription;
    }


    // ----------------------------------------------------------
    /**
     * Setter for the appointment's hour property.
     * @param newHour the new hour for this appointment (0-23)
     */
    public void setHour(int newHour)
    {
        hour = newHour;
    }


    // ----------------------------------------------------------
    /**
     * A convenience setter that takes a time like "9am" or "11pm" and
     * sets this appointment's hour.
     * @param time a 12-hour am/pm time for this appointment
     */
    public void setTime(String time)
    {
        String digits  = time.substring(0, time.length() - 2);
        int    newHour = Integer.parseInt(digits);
        char   half    = time.toLowerCase().charAt(time.length() - 2);
        if (half == 'p' && newHour < 12)
        {
            newHour += 12;
        }
        else if (half == 'a' && newHour == 12)
        {
            newHour = 0;
        }
        setHour(newHour);
    }


    // ----------------------------------------------------------
    /**
     * Generate a string representation for this appointment, with the
     * form "11am: dentist" or "2pm: class".  The string consists of the
     * 12-hour time representation with a (lower case) "am" or "pm"
     * designator, followed by a colon and space, and then the appointment
     * description.
     * @return a printable representation of this appointment
     */
    public String toString()
    {
        String half = (hour > 11) ? "pm" : "am";
        int printableHour = hour;
        if (printableHour > 11)
        {
            printableHour -= 12;
        }
        if (printableHour == 0)
        {
            printableHour = 12;
        }
        return printableHour + half + ": " + description;
    }
}