import java.util.ArrayList;
 
 class Student 
 {
    /*
     * data members/state variables
     */
    private String firstName, lastName, gender, phone, userid;
    private long studentNumber;
    private ArrayList<Course> courses;
    
    /*
     *  Constructors
     */
    public Student(long studentNumber) 
    {
        this.studentNumber = studentNumber;
        this.courses = new ArrayList<Course>();
    }
    public Student(long studentNumber, String userid) 
    {
        this.studentNumber = studentNumber;
        this.userid = userid;
        this.courses = new ArrayList<Course>();
    }
    
    /*
     * Utility methods
     */
    public String toString() 
    {
    	return studentNumber + ": " 
    	        + lastName + ", " + firstName;
    }
	
    /* simple clone method 
    Is this ok?*/
    public Student clone() 
    {
    	Student s = new Student(studentNumber, userid);
    	s.setFirstName(firstName);
    	s.setLastName(lastName);
    	return s;
    }
    
    
 
    
    
    /* Equality based on student number. */
    public boolean equals(Student other) 
    {
    	return this.studentNumber == other.studentNumber;
    }
    
    /* What is going on here? */
    public long compareTo(Student other) 
    {
    	int ln = lastName.compareTo(other.lastName);
    	if (ln!=0) 
    	{
    		return ln;
    	} 
    	else 
    	{
    		return firstName.compareTo(other.firstName);
    	}
    	
    }

    /*
     * Simple getters and setters
     */
    public void setFirstName(String name) 
    {
        if ( name.length() > 0 ) 
        {
            firstName = name;
        } 
        else 
        {
            // error
        }
    }
    public String getFirstName() 
    {
        return firstName;
    }
    public void setLastName(String name) 
    {
        if ( name.length() > 0 ) 
        {
            lastName = name;
        } 
        else 
        {
            // error
        }
    }
    public String getLastName() 
    {
        return lastName;
    }
    public long getStudentNumber() 
    {
        return studentNumber;
    }
    public String getUserID() 
    {
        return userid;
    }
    public String getPhone() 
    {
    	return phone;
    }
    public void setPhone(long number) 
    {
    	setPhone( Long.toString(number) );
    }
    public void setPhone(String number) 
    {
    	if ( number.length() == 10 && number.charAt(0) != '1' ) 
    	{
            phone = number;
    	} 
    	else 
    	{
            // should cause an error here.
    	}
    }
    
    /*
     * Dealing with course registration
     */
    public void addCourse(String crs) 
    {
    	// check for duplicates
    	for( int i=0; i<courses.size(); i++) 
    	{
    		Course thiscourse = courses.get(i);
    		if ( thiscourse.getName().equals(crs) ) 
    		{
    			// error
    			return;
    		}
    	}
    	
    	// no dupes: add course
    	Course c = new Course(crs);
    	courses.add(c);
    }
    
    
    public void printCourses() 
    {
    	for( int i=0; i<courses.size(); i++) 
    	{
            System.out.println(courses.get(i));
    	}
    }
    
    /*
     * Handling marks
     */
    
    public void setMark(String crs, String mark) 
    {
    	for( int i=0; i<courses.size(); i++) {
    		Course thiscourse = courses.get(i);
    		if ( thiscourse.getName().equals(crs) ) 
    		{
    			thiscourse.setMark(mark);
    		}
    	}
    }
    
    
    
    
    
  
    
    
    
    
    
    
    /* longer clone method below 
    
    
    
    
    
  
    public Student clone()
    {
	    Student s = new Student(studentNumber);
	    
    	s.firstName = this.firstName;
    	s.lastName = this.lastName;
    	s.gender = this.gender;
    	s.phone = this.phone;
    	s.userid = this.userid;

	    s.courses = this.copyCourses(); 	//need utility method
    	
    	return s;
    } 
    
    private ArrayList<Course> copyCourses()
    {
	 	ArrayList<Course> copy = new ArrayList<Course>();
	 	for(int i=0; i<courses.size();i++)
	 		copy.add(courses.get(i));
	 	return copy;   
    }
    */
    
    
    
    
    
    
}