package net.sourceforge.fenixedu.domain.tests.predicates;

import java.util.HashMap;

import net.sourceforge.fenixedu.domain.DomainReference;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.tests.NewChoice;
import net.sourceforge.fenixedu.domain.tests.NewMultipleChoiceQuestion;
import net.sourceforge.fenixedu.domain.tests.NewQuestion;
import net.sourceforge.fenixedu.presentationTier.Action.teacher.tests.PredicateBean;

public class MultipleChoiceAnswerPredicate extends AtomicPredicate implements Predicate {
    private final DomainReference<NewChoice> choice;

    public MultipleChoiceAnswerPredicate(NewChoice choice) {
	super();
	this.choice = new DomainReference<NewChoice>(choice);
    }

    public MultipleChoiceAnswerPredicate(PredicateBean predicateBean) {
	this(predicateBean.getChoice());
    }

    public boolean evaluate(NewQuestion question, Person person) {
	NewMultipleChoiceQuestion multipleChoiceQuestion = (NewMultipleChoiceQuestion) question;

	if (!multipleChoiceQuestion.isAnswered(person)) {
	    return false;
	}

	return multipleChoiceQuestion.getMultipleChoiceAnswer(person).contains(this.getChoice());
    }

    public NewChoice getChoice() {
	return choice.getObject();
    }

    public boolean uses(Object object) {
	NewChoice choice = (NewChoice) object;

	return choice.equals(this.getChoice());
    }

    public Predicate transform(HashMap<Object, Object> transformMap) {
	NewChoice transformation = (NewChoice) transformMap.get(getChoice());
	return new MultipleChoiceAnswerPredicate(transformation != null ? transformation : getChoice());
    }

}