package net.sourceforge.fenixedu.domain.phd.seminar;

import java.util.List;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.phd.exceptions.PhdDomainOperationException;

import org.joda.time.DateTime;

public class PublicPresentationSeminarState extends PublicPresentationSeminarState_Base {

    private PublicPresentationSeminarState() {
        super();
    }

    PublicPresentationSeminarState(final PublicPresentationSeminarProcess process,
            final PublicPresentationSeminarProcessStateType type, final Person person, final String remarks,
            final DateTime stateDate) {
        this();
        String[] args = {};
        if (process == null) {
            throw new DomainException("error.PublicPresentationSeminarState.invalid.process", args);
        }
        String[] args1 = {};
        if (type == null) {
            throw new DomainException("error.PublicPresentationSeminarState.invalid.type", args1);
        }

        checkType(process, type);
        setProcess(process);

        super.init(person, remarks, stateDate, type);

        setType(type);
    }

    protected void init(final Person person, final String remarks, DateTime stateDate) {
        throw new RuntimeException("invoke other init");
    }

    private void checkType(final PublicPresentationSeminarProcess process, final PublicPresentationSeminarProcessStateType type) {
        final PublicPresentationSeminarProcessStateType currentType = process.getActiveState();
        if (currentType != null && currentType.equals(type)) {
            throw new PhdDomainOperationException("error.PublicPresentationSeminarState.equals.previous.state",
                    type.getLocalizedName());
        }
    }

    @Override
    protected void disconnect() {
        removeProcess();
        super.disconnect();
    }

    @Override
    public boolean isLast() {
        return getProcess().getMostRecentState() == this;
    }

    public static PublicPresentationSeminarState createWithInferredStateDate(final PublicPresentationSeminarProcess process,
            final PublicPresentationSeminarProcessStateType type, final Person person, final String remarks) {
        DateTime stateDate = null;

        PublicPresentationSeminarState mostRecentState = process.getMostRecentState();

        switch (type) {
        case WAITING_FOR_COMMISSION_CONSTITUTION:
            if (process.getPresentationRequestDate() == null) {
                throw new PhdDomainOperationException(
                        "error.phd.seminar.PublicPresentationSeminarState.presentationRequestDate.required");
            }

            stateDate = process.getPresentationRequestDate().toDateTimeAtStartOfDay();
            break;
        case COMMISSION_WAITING_FOR_VALIDATION:
            stateDate = mostRecentState.getStateDate().plusMinutes(1);
            break;
        case COMMISSION_VALIDATED:
            stateDate = mostRecentState.getStateDate().plusMinutes(1);
            break;
        case PUBLIC_PRESENTATION_DATE_SCHEDULED:
            stateDate = mostRecentState.getStateDate().plusMinutes(1);
            break;
        case REPORT_WAITING_FOR_VALIDATION:
            if (process.getMostRecentStateByType(PublicPresentationSeminarProcessStateType.REPORT_WAITING_FOR_VALIDATION) != null) {
                stateDate = mostRecentState.getStateDate().plusMinutes(1);
                break;
            }

            if (process.getPresentationDate() == null) {
                throw new PhdDomainOperationException(
                        "error.phd.seminar.PublicPresentationSeminarState.presentationDate.required");
            }

            stateDate = process.getPresentationDate().toDateTimeAtStartOfDay();
            break;
        case REPORT_VALIDATED:
            stateDate = mostRecentState.getStateDate().plusMinutes(1);
            break;
        case EXEMPTED:
            stateDate = new DateTime();
            break;
        }

        return createWithGivenStateDate(process, type, person, remarks, stateDate);
    }

    public static PublicPresentationSeminarState createWithGivenStateDate(final PublicPresentationSeminarProcess process,
            final PublicPresentationSeminarProcessStateType type, final Person person, final String remarks,
            final DateTime stateDate) {
        List<PublicPresentationSeminarProcessStateType> possibleNextStates =
                PublicPresentationSeminarProcessStateType.getPossibleNextStates(process);

        if (!possibleNextStates.contains(type)) {
            String expectedStatesDescription = buildExpectedStatesDescription(possibleNextStates);
            throw new PhdDomainOperationException("error.phd.seminar.PublicPresentationSeminarState.invalid.next.state",
                    type.getLocalizedName(), expectedStatesDescription);
        }

        return new PublicPresentationSeminarState(process, type, person, remarks, stateDate);
    }
}