/**
 * The Student class represents a student in a student administration system.
 * It holds the student details relevant in our context.
 *
 * @author Michael Kölling and David Barnes
 * @version 2016.02.29
 */
public class Instructor extends Person
{
    // the instructor's full name
    private String name;
    // the teacher ID
    private String id;
    // the amount of classes the instructor instructs.
    private int workload;

    /**
     * Create a new student with a given name and ID number.
     */
    public Instructor(String fullName, String teacherID)
    {
        name = fullName;
        id = teacherID;
        workload = 2;
    }

    /**
     * Return the full name of this teacher.
     */
    public String getName()
    {
        return name;
    }

    /**
     * Set a new name for this teacher.
     */
    public void changeName(String replacementName)
    {
        name = replacementName;
    }

    /**
     * Return the teacherID of this student.
     */
    public String getTeacherID()
    {
        return id;
    }

    /**
     * Add some classes to the teachers workload.
     */
    public void addWork(int additionalClasses)
    {
        workload += additionalClasses;
    }

    /**
     * Return the number of classes the teacher has.
     */
    public int getClasses()
    {
        return workload;
    }

    /**
     * Return the login name of this teacher. The login name is a combination
     * of the first four characters of the teacher's name and the first three
     * characters of the teacher's ID number.
     */
    public String getLoginName()
    {
        return name.substring(0,4) + id.substring(0,3);
    }

    /**
     * Print the teacher's name and ID number to the output terminal.
     */
    public void print()
    {
        System.out.println(name + ", teacher ID: " + id + ", Classes: " + workload);
    }
}