public class Professor implements Payable {


  private String name, department;
  private boolean tenure;

  private float payRate = 0;
  private double totalHours = 0;
  private double totalSalary = 0;


  public Professor(String name, String department, boolean tenure) {

    this.name = name;
    this.department = department;
    this.tenure = tenure;
  }


  public Professor(String name, String department) {

    this(name, department, false);
  }


  public boolean hasTenure() {

    return tenure;
  }


  public String getDepartment() {

    return department;
  }


  public String toString() {

    return "Professor " + name + " in Department " + department + (tenure ? " TENURED" : " NOT TENURED");
  }


  public String getName() {

    return name;
  }


  public double addHoursWorked(double h) throws Exception {

    if (h == 0) {
      throw new Exception("Cannot add zero (0) hours worked");
    } else if (h < 0) {
      throw new Exception("Cannot add negative (" + h + ") hours worked");
    } else if (payRate <= 0) {
      throw new Exception("Cannot use a zero or negative hourly (" + payRate + ") wage");
    }

    double newSalary = h * payRate;
    totalSalary += newSalary;
    totalHours += h;

    return newSalary;
  }


  public void setPayRate(float dollars) throws Exception {

    if (dollars <= 0) {
      throw new Exception("Cannot set a zero or negative hourly (" + dollars + ") wage");
    }

    this.payRate = dollars;
  }


  public double getSalaryTotal() {

    return totalSalary;
  }


  public String getAccount() {

    return "  Current hourly wage: $" + payRate + ", Total Salary: $" + totalSalary + ", Total Hours Worked: " + totalHours;
  }
}