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

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.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.organizationalStructure.UniversityUnit;
import net.sourceforge.fenixedu.domain.period.MobilityApplicationPeriod;
import pt.ist.fenixWebFramework.services.Service;

public class MobilityQuota extends MobilityQuota_Base {

    public MobilityQuota() {
        super();
        setRootDomainObject(RootDomainObject.getInstance());
    }

    public MobilityQuota(MobilityApplicationPeriod period, Degree degree, MobilityAgreement mobilityAgreement,
            Integer numberOfOpenings) {
        this();
        setApplicationPeriod(period);
        setDegree(degree);
        setMobilityAgreement(mobilityAgreement);
        setNumberOfOpenings(numberOfOpenings);
        check();
    }

    public MobilityQuota(final MobilityApplicationPeriod period, Degree degree, MobilityProgram mobilityProgram,
            UniversityUnit unit, Integer numberOfOpenings) {
        this();

        setApplicationPeriod(period);
        setDegree(degree);

        MobilityAgreement agreement = MobilityAgreement.getOrCreateAgreement(mobilityProgram, unit);

        setMobilityAgreement(agreement);

        setNumberOfOpenings(numberOfOpenings);

        check();
    }

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

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

    @Service
    public static MobilityQuota createVacancy(final MobilityApplicationPeriod period, final Degree degree,
            final MobilityProgram mobilityProgram, final UniversityUnit unit, final Integer numberOfOpenings) {
        return new MobilityQuota(period, degree, mobilityProgram, unit, numberOfOpenings);
    }

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

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

        return processList;
    }

    public boolean isQuotaAssociatedWithAnyApplication() {
        return hasAnyApplications();
    }

    public void delete() {
        if (isQuotaAssociatedWithAnyApplication()) {
            throw new DomainException("error.mobility.quota.is.associated.with.applications");
        }

        removeMobilityAgreement();
        removeDegree();
        removeApplicationPeriod();
        removeRootDomainObject();

        deleteDomainObject();
    }

    public boolean isFor(final MobilityProgram mobilityProgram) {
        return getMobilityAgreement().getMobilityProgram() == mobilityProgram;
    }

    public boolean isAssociatedToApplications() {
        return !getStudentApplicationProcesses().isEmpty();
    }

}