package net.sourceforge.fenixedu.domain.accounting;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.util.Money;

import org.joda.time.DateTime;

public class Discount extends Discount_Base {

    private Discount() {
	super();
	setRootDomainObject(RootDomainObject.getInstance());
	setWhenCreated(new DateTime());
    }

    Discount(final Person person, final Money amount) {
	this();
	checkAmount(amount);
	setAmount(amount);
	if (person != null) {
	    setUsername(person.getIstUsername());
	}
    }

    private void checkAmount(Money amount) {
	if (amount == null || !amount.isPositive()) {
	    throw new DomainException("error.Discount.invalid.amount");
	}
    }

    void delete() {
	removeEvent();
	removeRootDomainObject();
	super.deleteDomainObject();
    }

}