package net.sourceforge.fenixedu.domain.tests;

import java.util.List;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.tests.answers.ConcreteAnswer;
import net.sourceforge.fenixedu.domain.tests.answers.NullAnswer;
import net.sourceforge.fenixedu.domain.tests.predicates.Predicate;

import org.joda.time.DateTime;

public class NewAnswer extends NewAnswer_Base {

    public NewAnswer() {
	super();

	this.setRootDomainObject(RootDomainObject.getInstance());
	this.setConcreteAnswer(new NullAnswer());
    }

    public NewAnswer(NewAtomicQuestion atomicQuestion, Person person) {
	this();

	this.setAtomicQuestion(atomicQuestion);
	this.setPerson(person);
    }

    public void delete() {
	this.removeAtomicQuestion();
	this.removePerson();
	this.removeRootDomainObject();

	super.deleteDomainObject();
    }

    @Override
    public void setConcreteAnswer(ConcreteAnswer concreteAnswer) {
	super.setConcreteAnswer(concreteAnswer);

	if (concreteAnswer instanceof NullAnswer) {
	    return;
	}

	Predicate validator = this.getAtomicQuestion().getValidator();

	if (validator != null && !validator.evaluate(this.getAtomicQuestion(), this.getPerson())) {
	    throw new DomainException("validator.failed");
	}
    }

    public TestsGrade getCalculatedGrade() {
	if (this.getPercentage() == null) {
	    return new TestsGrade(0, this.getAtomicQuestion().getGrade().getScale());
	}

	return new TestsGrade((this.getPercentage().doubleValue() / ((double) 100))
		* this.getAtomicQuestion().getGrade().getValue(), this.getAtomicQuestion().getGrade().getScale());
    }

    public String getStringAnswer() {
	return (String) this.getConcreteAnswer().getAnswer();
    }

    public Double getNumericAnswer() {
	return (Double) this.getConcreteAnswer().getAnswer();
    }

    public DateTime getDateAnswer() {
	return (DateTime) this.getConcreteAnswer().getAnswer();
    }

    public List<NewChoice> getMultipleChoiceAnswer() {
	return (List<NewChoice>) this.getConcreteAnswer().getAnswer();
    }

}