package employeeStuff;
/**
 * Class Person is a class to represent people
 * @author Bill Kraynek
 */
public class Person implements Comparable<Person> {
    private String firstName;
    private String lastName;
    private String idNumber;
    
    /**
     * A constructor from two Strings
     * @param first is the person first name
     * @param last is the person's last name
     */
    public Person(String idNumber, String first, String last) {
        this.idNumber = idNumber;
        firstName = first;
        lastName = last;
    } // end constructor
    
    // accessors
    /**
     * Retrieve the idNumber
     * @return the idNumber as a String
     */
    public String getIdNumber() {
        return idNumber + "";
    }
    /**
     * Retrieve the first name
     * @return the first name as a String
     */
    public String getFirstName() {
        return firstName;
    }
    /**
     * Retrieve the last name
     * @return the last name as a String
     */
    public String getLastName() {
        return lastName;
    }
    
    // modifier
    /**
     * Change the last name
     * @param newName is the new last name
     */
    public void setLastName(String newName) {
        lastName = newName;
    }
    /**
     * Change the first name
     * @param newName is the new first name
     */
    public void setFirstName(String newName) {
        firstName = newName;
    }
    
    /**
     * Person objects are equal if id numbers are equal
     * @return true if id numbers are equal; false otherwise
     */
    public boolean equals(Object rhs) {
        if( rhs == null ) return false;
        if( !getClass().equals(rhs.getClass()) ) return false;
        return getIdNumber().equals(((Person)rhs).getIdNumber()) ;
    } // end equals
    
    // From the Java API: Note that it is generally necessary to override the hashCode method whenever this method
    // is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects
    // must have equal hash codes
    
    /**
     * Returns an int value asociated with this object
     * @return a hash code value for the object.
     **/
    public int hashCode() {
        return getIdNumber().hashCode();
    } // end hashCode
    
    /**
     * Compares this Person to another Person using
     * String compareTo on lastName and then firstName
     * and then id
     * @param rhs the Person to be compared
     * @return an int < 0 if less; an int == 0 if equal;
     * an int >0 if greater
     */
    public int compareTo(Person rhs) {
        String last;
        if( getLastName().equals("") ) last = getFirstName();
        else last = getLastName();
        String rhsLast;
        if( rhs.getLastName().equals("") ) rhsLast = rhs.getFirstName();
        else rhsLast = rhs.getLastName();
        int lastCompare = last.compareTo(rhsLast);
        if( lastCompare != 0 ) return lastCompare;
        int firstCompare = getFirstName().compareTo(rhs.getFirstName());
        if( firstCompare != 0 ) return firstCompare;
        return getIdNumber().compareTo(rhs.getIdNumber());
    } // end compareTo
    
    /**
     * Returns a String representation of the data in class Person
     * @return a string of the objects in Person
     */
    public String toString() {
        return idNumber + " : " + (lastName.equals("")?"":(lastName + " ")) + firstName;
    }
    
} // end Person