package net.sourceforge.fenixedu.domain.candidacyProcess.erasmus;

import java.util.ArrayList;
import java.util.List;

import net.sourceforge.fenixedu.domain.Degree;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.candidacyProcess.mobility.MobilityIndividualApplicationProcess;
import net.sourceforge.fenixedu.domain.candidacyProcess.mobility.MobilityStudentData;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.organizationalStructure.UniversityUnit;
import net.sourceforge.fenixedu.domain.period.MobilityApplicationPeriod;
import pt.ist.fenixWebFramework.services.Service;

public class ErasmusVacancy extends ErasmusVacancy_Base {

    private ErasmusVacancy() {
        super();
        setRootDomainObject(RootDomainObject.getInstance());
    }

    public ErasmusVacancy(final MobilityApplicationPeriod period, Degree degree, UniversityUnit unit, Integer numberOfVacancies) {
        this();

        setCandidacyPeriod(period);
        setDegree(degree);
        setUniversityUnit(unit);

        setNumberOfVacancies(numberOfVacancies);

        check();
    }

    private void check() {
        if (getCandidacyPeriod() == null) {
            throw new DomainException("error.erasmus.vacancy.candidacy.period.must.not.be.null");
        }

        if (getDegree() == null) {
            throw new DomainException("error.erasmus.vacancy.degree.must.not.be.null");
        }

        if (getUniversityUnit() == null) {
            throw new DomainException("error.erasmus.vacancy.university.unit.must.not.be.null");
        }

        if (getNumberOfVacancies() == null) {
            throw new DomainException("error.erasmus.vacancy.number.of.vacancies.must.not.be.null");
        }
    }

    @Service
    public static ErasmusVacancy createVacancy(final MobilityApplicationPeriod period, Degree degree, UniversityUnit unit,
            Integer numberOfVacancies) {
        return new ErasmusVacancy(period, degree, unit, numberOfVacancies);
    }

    public List<MobilityIndividualApplicationProcess> getStudentApplicationProcesses() {
        List<MobilityIndividualApplicationProcess> processList = new ArrayList<MobilityIndividualApplicationProcess>();

        for (MobilityStudentData data : getCandidacies()) {
            processList.add(data.getMobilityIndividualApplication().getCandidacyProcess());
        }

        return processList;
    }

    public boolean isVacancyAssociatedToAnyCandidacy() {
        return hasAnyCandidacies();
    }

    public void delete() {
        if (isVacancyAssociatedToAnyCandidacy()) {
            throw new DomainException("error.erasmus.vacancy.is.associated.to.candidacies");
        }

        removeUniversityUnit();
        removeDegree();
        removeCandidacyPeriod();
        removeRootDomainObject();

        deleteDomainObject();
    }

}