package exercise06;

import java.math.BigInteger;
import java.util.HashSet;
import java.util.Set;

import exercise05.Course;

public class Student extends Person {

	public Student(String name, int id) {
		super(name, id);
	}

	Set<Course> attends = new HashSet<>();

	@Override
	public BigInteger balance() {
		return BigInteger.valueOf(-20).multiply(BigInteger.valueOf(attends.size()));
	}

	@Override
	public boolean check() {
		for (Course course1 : attends) {
			for (Course course2 : attends) {
				if (course1.getTitle().equals(course2.getTitle()) && !course1.equals(course2)) {
					return false;
				}
			}
		}
		return true;
	}
}