EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.vaadin.view.registration;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.EnumSet;

import java.util.HashMap;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.Objects;

import java.util.Optional;

import java.util.Set;

import java.util.Stack;

import java.util.UUID;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.transaction.TransactionStatus;

import org.vaadin.spring.events.EventScope;

import org.vaadin.spring.events.annotation.EventBusListenerMethod;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.spring.annotation.ViewScope;

import com.vaadin.ui.AbstractField;

import com.vaadin.ui.Label;

import com.vaadin.ui.UI;

import com.vaadin.ui.VerticalLayout;

import com.vaadin.ui.Window;

import eu.etaxonomy.cdm.api.service.INameService;

import eu.etaxonomy.cdm.api.service.IRegistrationService;

import eu.etaxonomy.cdm.api.service.config.RegistrationStatusTransitions;

import eu.etaxonomy.cdm.api.service.dto.RegistrationDTO;

import eu.etaxonomy.cdm.api.service.dto.RegistrationWorkingSet;

import eu.etaxonomy.cdm.api.service.exception.RegistrationValidationException;

import eu.etaxonomy.cdm.api.service.name.TypeDesignationSetManager.TypeDesignationWorkingSetType;

import eu.etaxonomy.cdm.api.service.registration.IRegistrationWorkingSetService;

import eu.etaxonomy.cdm.api.utility.UserHelper;

import eu.etaxonomy.cdm.cache.CdmTransientEntityAndUuidCacher;

import eu.etaxonomy.cdm.database.PermissionDeniedException;

import eu.etaxonomy.cdm.model.ICdmEntityUuidCacher;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.name.NameTypeDesignation;

import eu.etaxonomy.cdm.model.name.Rank;

import eu.etaxonomy.cdm.model.name.Registration;

import eu.etaxonomy.cdm.model.name.RegistrationStatus;

import eu.etaxonomy.cdm.model.name.TaxonName;

import eu.etaxonomy.cdm.model.name.TaxonNameFactory;

import eu.etaxonomy.cdm.model.name.TypeDesignationBase;

import eu.etaxonomy.cdm.model.reference.Reference;

import eu.etaxonomy.cdm.model.reference.ReferenceType;

import eu.etaxonomy.cdm.persistence.hibernate.permission.CRUD;

import eu.etaxonomy.cdm.ref.EntityReference;

import eu.etaxonomy.cdm.ref.TypedEntityReference;

import eu.etaxonomy.cdm.service.CdmBeanItemContainerFactory;

import eu.etaxonomy.cdm.service.CdmFilterablePagingProvider;

import eu.etaxonomy.cdm.service.CdmFilterablePagingProviderFactory;

import eu.etaxonomy.cdm.service.CdmStore;

import eu.etaxonomy.cdm.service.UserHelperAccess;

import eu.etaxonomy.cdm.vaadin.component.registration.RegistrationItem;

import eu.etaxonomy.cdm.vaadin.component.registration.RegistrationStatusFieldInstantiator;

import eu.etaxonomy.cdm.vaadin.component.registration.RegistrationStatusSelect;

import eu.etaxonomy.cdm.vaadin.event.EditorActionContext;

import eu.etaxonomy.cdm.vaadin.event.EditorActionTypeFilter;

import eu.etaxonomy.cdm.vaadin.event.EntityChangeEvent;

import eu.etaxonomy.cdm.vaadin.event.ReferenceEditorAction;

import eu.etaxonomy.cdm.vaadin.event.RegistrationEditorAction;

import eu.etaxonomy.cdm.vaadin.event.ShowDetailsEvent;

import eu.etaxonomy.cdm.vaadin.event.ShowDetailsEventEntityTypeFilter;

import eu.etaxonomy.cdm.vaadin.event.TaxonNameEditorAction;

import eu.etaxonomy.cdm.vaadin.event.TypeDesignationWorkingsetEditorAction;

import eu.etaxonomy.cdm.vaadin.event.registration.RegistrationWorkingsetAction;

import eu.etaxonomy.cdm.vaadin.permission.AccessRestrictedView;

import eu.etaxonomy.cdm.vaadin.ui.RegistrationUIDefaults;

import eu.etaxonomy.cdm.vaadin.ui.config.TaxonNamePopupEditorConfig;

import eu.etaxonomy.cdm.vaadin.util.CdmTitleCacheCaptionGenerator;

import eu.etaxonomy.cdm.vaadin.view.name.CachingPresenter;

import eu.etaxonomy.cdm.vaadin.view.name.NameTypeDesignationPopupEditor;

import eu.etaxonomy.cdm.vaadin.view.name.SpecimenTypeDesignationWorkingsetPopupEditor;

import eu.etaxonomy.cdm.vaadin.view.name.TaxonNameEditorPresenter;

import eu.etaxonomy.cdm.vaadin.view.name.TaxonNamePopupEditor;

import eu.etaxonomy.cdm.vaadin.view.name.TypeDesignationWorkingsetEditorIdSet;

import eu.etaxonomy.cdm.vaadin.view.reference.ReferencePopupEditor;

import eu.etaxonomy.vaadin.mvp.AbstractPopupEditor;

import eu.etaxonomy.vaadin.mvp.AbstractPresenter;

import eu.etaxonomy.vaadin.mvp.AbstractView;

import eu.etaxonomy.vaadin.mvp.BeanInstantiator;

import eu.etaxonomy.vaadin.ui.navigation.NavigationEvent;

import eu.etaxonomy.vaadin.ui.view.DoneWithPopupEvent;

import eu.etaxonomy.vaadin.ui.view.DoneWithPopupEvent.Reason;

/**

 * @author a.kohlbecker

 * @since Mar 3, 2017

 *

 */

@SpringComponent

@ViewScope

public class RegistrationWorkingsetPresenter extends AbstractPresenter<RegistrationWorkingsetView> implements CachingPresenter {

    private static final Logger logger = Logger.getLogger(RegistrationWorkingsetPresenter.class);

    private static final long serialVersionUID = 1L;

    @Autowired

    private IRegistrationWorkingSetService regWorkingSetService;

    @Autowired

    private CdmFilterablePagingProviderFactory pagingProviderFactory;

    @Autowired

    private CdmBeanItemContainerFactory selectFieldFactory;

    /**

     * @return the regWorkingSetService

     */

    public IRegistrationWorkingSetService getWorkingSetService() {

        return regWorkingSetService;

    }

    private RegistrationWorkingSet workingset;

    /**

     * Contains the poupeditor which has been opened to start the registration of a new name as long as it has not been saved or canceled.

     * There can always only be one popup editor for this purpose.

     */

    private TaxonNamePopupEditor newNameForRegistrationPopupEditor = null;

    /**

     * Contains

     */

    private List<Registration> newNameBlockingRegistrations = new ArrayList<>();

    /**

     * TODO is this still needed? The regitration UUID should be accessible in the popup editor context,

     * see findRegistrationInContext()

     */

    private Map<NameTypeDesignationPopupEditor, UUID> nameTypeDesignationPopupEditorRegistrationUUIDMap = new HashMap<>();

    private ICdmEntityUuidCacher cache;

    private Collection<CdmBase> rootEntities = new HashSet<>();

    /**

     *

     */

    public RegistrationWorkingsetPresenter() {

    }

    /**

     * Always create a new Store

     *

     * @return

     */

    protected CdmStore<Registration, IRegistrationService> getRegistrationStore(){

        return new CdmStore<Registration, IRegistrationService>(getRepo(), getRepo().getRegistrationService());

    }

    /**

     * Always create a new Store

     *

     * @return

     */

    protected CdmStore<TaxonName, INameService> getTaxonNameStore(){

        return new  CdmStore<TaxonName, INameService>(getRepo(), getRepo().getNameService());

    }

    /**

     * Checks

     * <ol>

     * <li>if there is NOT any registration for this name created in the current registration system</li>

     * <li>Checks if the name belongs to the current workingset</li>

     * </ol>

     * If both checks are successful the method returns <code>true</code>.

     */

    public boolean canCreateNameRegistrationFor(TaxonName name) {

        return !getRepo().getRegistrationService().checkRegistrationExistsFor(name) && checkWokingsetContainsProtologe(name);

    }

    /**

     * @param name

     * @return

     */

    public boolean checkWokingsetContainsProtologe(TaxonName name) {

        Reference nomRef = name.getNomenclaturalReference();

        UUID citationUuid = workingset.getCitationUuid();

        // @formatter:off

        return nomRef != null && (

                // nomref matches

                nomRef.getUuid().equals(citationUuid) ||

                // nomref.inreference matches

                (nomRef.getType() != null && nomRef.getType() == ReferenceType.Section && nomRef.getInReference() != null && nomRef.getInReference().getUuid().equals(citationUuid))

                );

        // @formatter:on

    }

    /**

     * @param doReload reload the workingset from the persistent storage.

     *  Workingsets which are not yet persisted are preserved.

     *

     */

    protected void refreshView(boolean doReload) {

        if(workingset == null){

            return; // nothing to do

        }

        if(doReload){

            List<RegistrationDTO> unpersisted = new ArrayList<>();

            for(RegistrationDTO regDto : workingset.getRegistrationDTOs()){

                if(!regDto.registration().isPersited()){

                    unpersisted.add(regDto);

                }

            }

            loadWorkingSet(workingset.getCitationUuid());

            for(RegistrationDTO regDtoUnpersisted : unpersisted){

                if(!workingset.getRegistrationDTOs().stream().anyMatch(dto -> dto.getUuid().equals(regDtoUnpersisted.getUuid()))){

                    // only add if the regDtoUnpersisted has not been persisted meanwhile

                    try {

                        workingset.add(regDtoUnpersisted);

                    } catch (RegistrationValidationException e) {

                        // would never happen here //

                    }

                }

            }

        }

        applyWorkingset();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void handleViewEntered() {

        super.handleViewEntered();

        // TODO currently cannot specify type more precisely, see AbstractSelect

        // FIXME externalize into class file!!!!!!!!!!!!

        getView().setStatusComponentInstantiator(new RegistrationStatusFieldInstantiator<Object>(){

            private static final long serialVersionUID = 7099181280977511048L;

            @Override

            public AbstractField<Object> create(RegistrationDTO regDto) {

                // submitters have GrantedAuthorities like REGISTRATION(PREPARATION).[UPDATE]{ab4459eb-3b96-40ba-bfaa-36915107d59e}

                UserHelper userHelper = UserHelperAccess.userHelper().withCache(getCache());

                Set<RegistrationStatus> availableStatus = new HashSet<>();

                boolean canChangeStatus = userHelper.userHasPermission(regDto.registration(), CRUD.UPDATE);

                availableStatus.add(regDto.getStatus());

                if(canChangeStatus){

                    if(userHelper.userIsAdmin()){

                        availableStatus.addAll(Arrays.asList(RegistrationStatus.values()));

                    } else {

                        availableStatus.addAll(RegistrationStatusTransitions.possibleTransitions(regDto.getStatus()));

                    }

                }

                RegistrationStatusSelect select = new RegistrationStatusSelect(null, selectFieldFactory.buildBeanItemContainer(

                        RegistrationStatus.class,

                        availableStatus.toArray(new RegistrationStatus[availableStatus.size()]))

                        );

                select.setValue(regDto.getStatus());

                select.addValueChangeListener(e -> saveRegistrationStatusChange(regDto.getUuid(), e.getProperty().getValue()));

                select.setEnabled(canChangeStatus);

                select.setNullSelectionAllowed(false);

                return select;

            }

        });

        loadWorkingSet(getView().getCitationUuid());

        applyWorkingset();

    }

    private void applyWorkingset(){

         getView().setWorkingset(workingset);

        // PagingProviders and CacheGenerator for the existingNameCombobox

        activateComboboxes();

    }

    protected void activateComboboxes() {

        CdmTitleCacheCaptionGenerator<TaxonName> titleCacheGenerator = new CdmTitleCacheCaptionGenerator<TaxonName>();

        getView().getAddExistingNameCombobox().setCaptionGenerator(titleCacheGenerator);

        CdmFilterablePagingProvider<TaxonName, TaxonName> pagingProvider = pagingProviderFactory.taxonNamesWithoutOrthophicIncorrect();

        getView().getAddExistingNameCombobox().loadFrom(pagingProvider, pagingProvider, pagingProvider.getPageSize());

    }

    /**

     * @param referenceID

     */

    protected void loadWorkingSet(UUID referenceUuid) {

        try {

            workingset = getWorkingSetService().loadWorkingSetByReferenceUuid(referenceUuid, true);

        } catch (RegistrationValidationException error) {

            logger.error(error);

            showErrorDialog("Validation Error", error.getMessage());

        } catch(PermissionDeniedException e){

            logger.info(e);

            ((AccessRestrictedView)getView()).setAccessDeniedMessage(e.getMessage());

        }

        cache = new CdmTransientEntityAndUuidCacher(this);

        for(Registration registration : workingset.getRegistrations()) {

            addRootEntity(registration);

        }

    }

    /**

     * @param errorDialogCaption

     * @param errorMessage

     */

    public void showErrorDialog(String errorDialogCaption, String errorMessage) {

        Window errorDialog = new Window(errorDialogCaption);

        errorDialog.setModal(true);

        VerticalLayout subContent = new VerticalLayout();

        subContent.setMargin(true);

        errorDialog.setContent(subContent);

        subContent.addComponent(new Label(errorMessage));

        UI.getCurrent().addWindow(errorDialog);

    }

    private void saveRegistrationStatusChange(UUID uuid, Object value) {

        Registration reg = getRepo().getRegistrationService().load(uuid);

        if(reg == null){

            // registration was not yet persisted, ignore

            return;

        }

        if(value != null && value instanceof RegistrationStatus){

            if(!Objects.equals(value, reg.getStatus())){

                reg.updateStatusAndDate((RegistrationStatus)value);

                getRegistrationStore().saveBean(reg, (AbstractView)getView());

                refreshView(true);

            }

        } else {

            // only log here as error

            logger.error("Ivalid attempt to set RegistrationStatus to " + Objects.toString(value.toString(), "NULL"));

        }

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

    public void onReferenceEditorActionAdd(ReferenceEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        ReferencePopupEditor popup = openPopupEditor(ReferencePopupEditor.class, event);

        popup.withReferenceTypes(RegistrationUIDefaults.PRINTPUB_REFERENCE_TYPES);

        popup.loadInEditor(null);

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Edit.class)

    public void onReferenceEditorActionEdit(ReferenceEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        ReferencePopupEditor popup = openPopupEditor(ReferencePopupEditor.class, event);

        popup.withReferenceTypes(RegistrationUIDefaults.PRINTPUB_REFERENCE_TYPES);

        popup.withDeleteButton(true);

        popup.loadInEditor(event.getEntityUuid());

    }

    @EventBusListenerMethod

    public void onDoneWithReferencePopupEditor(DoneWithPopupEvent event) throws RegistrationValidationException{

        if(event.getPopup() instanceof ReferencePopupEditor){

            if(event.getReason().equals(Reason.SAVE)){

                refreshView(true);

            }

        }

    }

    @EventBusListenerMethod

    public void onDoneWithSpecimenTypeDesignationWorkingsetPopupEditor(DoneWithPopupEvent event) throws RegistrationValidationException{

        if(event.getPopup() instanceof SpecimenTypeDesignationWorkingsetPopupEditor){

            if(event.getReason().equals(Reason.SAVE)){

                refreshView(true);

            }

        }

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Edit.class)

    public void onRegistrationEditorAction(RegistrationEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        RegistrationPopupEditor popup = openPopupEditor(RegistrationPopupEditor.class, event);

        popup.loadInEditor(event.getEntityUuid());

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Edit.class)

    public void onTaxonNameEditorActionEdit(TaxonNameEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        TaxonNamePopupEditor popup = openPopupEditor(TaxonNamePopupEditor.class, event);

        popup.setParentEditorActionContext(event.getContext(), event.getTarget());

        popup.withDeleteButton(true);

        TaxonNamePopupEditorConfig.configureForNomenclaturalAct(popup);

        popup.loadInEditor(event.getEntityUuid());

        if(event.hasSource() && event.getSource().isReadOnly()){

            // avoid resetting readonly to false

            popup.setReadOnly(true);

        }

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

    public void onTaxonNameEditorActionAdd(TaxonNameEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        getView().getAddNewNameRegistrationButton().setEnabled(false);

        if(newNameForRegistrationPopupEditor == null){

            TaxonNamePopupEditor popup = openPopupEditor(TaxonNamePopupEditor.class, event);

            newNameForRegistrationPopupEditor = popup;

            popup.setParentEditorActionContext(event.getContext(), event.getTarget());

            popup.grantToCurrentUser(EnumSet.of(CRUD.UPDATE,CRUD.DELETE));

            popup.withDeleteButton(true);

            popup.setCdmEntityInstantiator(new BeanInstantiator<TaxonName>() {

                @Override

                public TaxonName createNewBean() {

                    TaxonName newTaxonName = TaxonNameFactory.NewNameInstance(RegistrationUIDefaults.NOMENCLATURAL_CODE, Rank.SPECIES());

                    newTaxonName.setNomenclaturalReference(getRepo().getReferenceService().load(workingset.getCitationUuid(), TaxonNameEditorPresenter.REFERENCE_INIT_STRATEGY ));

                    return newTaxonName;

                }

            });

            TaxonNamePopupEditorConfig.configureForNomenclaturalAct(popup);

            popup.loadInEditor(null);

        }

    }

    /**

     * Creates a new <code>Registration</code> for a new name that has just been edited

     * using a <code>TaxonNamePopupEditor</code>. The popup editor which has been opened to

     * edit the new name was remembered in <code>newNameForRegistrationPopupEditor</code>.

     * Any blocking registrations which have been created while editing the new name are

     * temporarily stored in <code>newNameBlockingRegistrations</code> until the registration

     * for the first name has been created. Additional new names are created for example

     * when a new name as basionym, replaced synonym, etc to the new name is created.

     * <p>

     * See also {@link #onTaxonNameEditorActionAdd(TaxonNameEditorAction)}).

     *

     * @param event

     * @throws RegistrationValidationException

     */

    @EventBusListenerMethod

    public void onDoneWithTaxonnameEditor(DoneWithPopupEvent event) throws RegistrationValidationException{

        if(event.getPopup() instanceof TaxonNamePopupEditor){

            if(newNameForRegistrationPopupEditor != null && event.getPopup().equals(newNameForRegistrationPopupEditor)){

                if(event.getReason().equals(Reason.SAVE)){

                    try {

                        // TODO move into a service class --------------

                        TransactionStatus txStatus = getRepo().startTransaction();

                        UUID taxonNameUuid = newNameForRegistrationPopupEditor.getBean().getUuid();

                        if(newNameForRegistrationPopupEditor.getBean().cdmEntity().isPersited()){

                            getRepo().getSession().refresh(newNameForRegistrationPopupEditor.getBean().cdmEntity());

                        }

                        Registration reg = getRepo().getRegistrationService().createRegistrationForName(taxonNameUuid);

                        if(!newNameBlockingRegistrations.isEmpty()){

                            for(Registration blockingReg : newNameBlockingRegistrations){

                                blockingReg = getRepo().getRegistrationService().load(blockingReg.getUuid());

                                reg.getBlockedBy().add(blockingReg);

                            }

                            getRepo().getRegistrationService().saveOrUpdate(reg);

                            newNameBlockingRegistrations.clear();

                        }

                        getRepo().commitTransaction(txStatus);

                        // --------------------------------------------------

                        // reload workingset into current session

                        loadWorkingSet(workingset.getCitationUuid());

                    } finally {

                        clearSession();

                        refreshView(true);

                        getView().getAddNewNameRegistrationButton().setEnabled(true);

                    }

                }

                // nullify and clear the memory on this popup editor in any case (SAVE, CANCEL, DELETE)

                newNameForRegistrationPopupEditor = null;

                newNameBlockingRegistrations.clear();

                getView().getAddNewNameRegistrationButton().setEnabled(true);

            } else {

                refreshView(true);

            }

        }

    }

    /**

     * Creates a new Registration for an exiting (previously published) name.

     *

     * @param event

     * @throws RegistrationValidationException

     */

    @EventBusListenerMethod

    public void onRegistrationWorkflowEventActionStart(RegistrationWorkingsetAction event) throws RegistrationValidationException {

        if(!event.isStart()){

            return;

        }

        getView().getAddExistingNameCombobox().commit(); // update the chosen value in the datasource

        TaxonName typifiedName = getView().getAddExistingNameCombobox().getValue();

        if(typifiedName != null){

            boolean doReloadWorkingSet = false;

            try {

                // TODO move into a service class --------------

                TransactionStatus txStatus = getRepo().startTransaction(true);

                Reference citation = getRepo().getReferenceService().load(workingset.getCitationUuid(), Arrays.asList("authorship.$", "inReference.authorship.$"));

                // here we completely ignore the ExistingNameRegistrationType since the user should not have the choice

                // to create a typification only registration in the working (publication) set which contains

                // the protologe. This is known from the nomenclatural reference.

                if(canCreateNameRegistrationFor(typifiedName)){

                    // the citation which is the base for workingset contains the protologe of the name and the name has not

                    // been registered before:

                    // create a registration for the name and the first typifications

                    Registration newRegistrationWithExistingName = getRepo().getRegistrationService().createRegistrationForName(typifiedName.getUuid());

                    workingset.add(new RegistrationDTO(newRegistrationWithExistingName, typifiedName, citation));

                    doReloadWorkingSet = true;

                } else {

                    if(!checkWokingsetContainsProtologe(typifiedName)){

                        // create a typification only registration

                        Registration typificationOnlyRegistration = getRepo().getRegistrationService().newRegistration();

                        if(!getRepo().getRegistrationService().checkRegistrationExistsFor(typifiedName)){

                            // oops, yet no registration for this name, so we create it as blocking registration:

                            Registration blockingNameRegistration = getRepo().getRegistrationService().createRegistrationForName(typifiedName.getUuid());

                            typificationOnlyRegistration.getBlockedBy().add(blockingNameRegistration);

                        }

                        RegistrationDTO regDTO = new RegistrationDTO(typificationOnlyRegistration, typifiedName, citation);

                        workingset.add(regDTO);

                    }

                }

                getRepo().commitTransaction(txStatus);

                // --------------------------------------------------

                // tell the view to update the workingset

            } finally {

                clearSession();

                refreshView(doReloadWorkingSet);

                getView().getAddExistingNameRegistrationButton().setEnabled(false);

            }

        } else {

            logger.error("Seletced name is NULL");

        }

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Edit.class)

    public void onTypeDesignationsEditorActionEdit(TypeDesignationWorkingsetEditorAction event) {

        if(!checkFromOwnView(event)){

            return;

        }

        if(event.getWorkingSetType() == TypeDesignationWorkingSetType.SPECIMEN_TYPE_DESIGNATION_WORKINGSET ){

            SpecimenTypeDesignationWorkingsetPopupEditor popup = openPopupEditor(SpecimenTypeDesignationWorkingsetPopupEditor.class, event);

            popup.setParentEditorActionContext(event.getContext(), event.getTarget());

            popup.withDeleteButton(true);

            popup.loadInEditor(new TypeDesignationWorkingsetEditorIdSet(event.getRegistrationUuid(), event.getBaseEntityRef()));

            if(event.hasSource()){

                // propagate readonly state from source button to popup

                popup.setReadOnly(event.getSource().isReadOnly());

            }

        } else {

            NameTypeDesignationPopupEditor popup = openPopupEditor(NameTypeDesignationPopupEditor.class, event);

            popup.setParentEditorActionContext(event.getContext(), event.getTarget());

            popup.withDeleteButton(true);

            popup.loadInEditor(new TypeDesignationWorkingsetEditorIdSet(event.getRegistrationUuid(), event.getBaseEntityRef()));

            popup.getCitationCombobox().setEnabled(false);

            popup.getTypifiedNamesComboboxSelect().setEnabled(false);

            if(event.hasSource()){

                // propagate readonly state from source button to popup

                popup.setReadOnly(event.getSource().isReadOnly());

            }

            nameTypeDesignationPopupEditorRegistrationUUIDMap.put(popup, event.getRegistrationUuid());

        }

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

    public void onTypeDesignationWorkingsetAdd(TypeDesignationWorkingsetEditorAction event) {

        if(!event.hasSource()){

            return;

        }

        if(event.getWorkingSetType() == TypeDesignationWorkingSetType.SPECIMEN_TYPE_DESIGNATION_WORKINGSET){

            SpecimenTypeDesignationWorkingsetPopupEditor popup = openPopupEditor(SpecimenTypeDesignationWorkingsetPopupEditor.class, event);

            popup.setParentEditorActionContext(event.getContext(), event.getTarget());

            TypeDesignationWorkingsetEditorIdSet identifierSet;

            UUID typifiedNameUuid;

            RegistrationDTO registrationDTO = workingset.getRegistrationDTO(event.getRegistrationUuid()).get();

            EntityReference typifiedNameRef = registrationDTO.getTypifiedNameRef();

            if(typifiedNameRef != null){

                // case for registrations without name, in which case the typifiedName is only defined via the typedesignations

                typifiedNameUuid = typifiedNameRef.getUuid();

            } else {

                // case of registrations with a name in the nomenclatural act.

                typifiedNameUuid = registrationDTO.getNameRef().getUuid();

            }

            identifierSet = new TypeDesignationWorkingsetEditorIdSet(

                    event.getRegistrationUuid(),

                    getView().getCitationUuid(),

                    typifiedNameUuid

                    );

            popup.grantToCurrentUser(EnumSet.of(CRUD.UPDATE, CRUD.DELETE));

            popup.loadInEditor(identifierSet);

            popup.withDeleteButton(true);

            if(event.hasSource()){

                // propagate readonly state from source component to popup

                popup.setReadOnly(event.getSource().isReadOnly());

            }

        } else {

            NameTypeDesignationPopupEditor popup = openPopupEditor(NameTypeDesignationPopupEditor.class, event);

            popup.setParentEditorActionContext(event.getContext(), event.getTarget());

            popup.withDeleteButton(true);

            popup.grantToCurrentUser(EnumSet.of(CRUD.UPDATE, CRUD.DELETE));

            RegistrationDTO regDto = workingset.getRegistrationDTO(event.getRegistrationUuid()).get();

            Reference citation = regDto.getCitation();

            nameTypeDesignationPopupEditorRegistrationUUIDMap.put(popup, event.getRegistrationUuid());

            popup.setBeanInstantiator(new BeanInstantiator<NameTypeDesignation>() {

                @Override

                public NameTypeDesignation createNewBean() {

                    TaxonName typifiedName = getRepo().getNameService().load(event.getTypifiedNameUuid(), Arrays.asList(new String[]{"typeDesignations", "homotypicalGroup"}));

                    NameTypeDesignation nameTypeDesignation  = NameTypeDesignation.NewInstance();

                    nameTypeDesignation.setCitation(citation);

                    nameTypeDesignation.getTypifiedNames().add(typifiedName);

                    return nameTypeDesignation;

                }

            });

            popup.loadInEditor(null);

            popup.getCitationCombobox().setEnabled(false);

            popup.getTypifiedNamesComboboxSelect().setEnabled(false);

            if(event.hasSource()){

                // propagate readonly state from source component to popup

                popup.setReadOnly(event.getSource().isReadOnly());

            }

        }

    }

    /**

     * Performs final actions after a TypeDesignationEditor which has been

     * opened to add a TypeDesignation to a Registration object which was

     * created for an previously published name. Prior adding a typedesignation,

     * the according Registration object is dangling, that has no association to

     * any entity denoting an nomenclatural act which has a reference to a

     * publication. This means that the registration object is not in the

     * working set.

     *

     *

     * @param event

     * @throws RegistrationValidationException

     */

    @EventBusListenerMethod

    public void onDoneWithTypeDesignationEditor(DoneWithPopupEvent event) throws RegistrationValidationException{

        if(event.getPopup() instanceof SpecimenTypeDesignationWorkingsetPopupEditor){

            if(event.getReason().equals(Reason.SAVE)){

                // NOTE: adding the SpecimenTypeDesignations to the registration is done in the

                // SpecimenTypeDesignationWorkingSetServiceImpl.save(SpecimenTypeDesignationWorkingSetDTO dto) method

                refreshView(true);

            } else if(event.getReason().equals(Reason.CANCEL)){

                // noting to do

            }

        } else if(event.getPopup() instanceof NameTypeDesignationPopupEditor){

            if(event.getReason().equals(Reason.SAVE)){

                UUID typeDesignationUuid = ((NameTypeDesignationPopupEditor)event.getPopup()).getBean().getUuid();

                try {

                    clearSession();

                    // TODO move into a service class --------------

                    TransactionStatus txStatus = getRepo().startTransaction();

                    UUID regUUID = nameTypeDesignationPopupEditorRegistrationUUIDMap.get(event.getPopup());

                    Stack<EditorActionContext>context = ((AbstractPopupEditor)event.getPopup()).getEditorActionContext();

                    Registration registration = findRegistrationInContext(context);

                    getRepo().getRegistrationService().addTypeDesignation(registration, typeDesignationUuid);

                    getRepo().getRegistrationService().saveOrUpdate(registration);

                    nameTypeDesignationPopupEditorRegistrationUUIDMap.remove(event.getPopup());

                    getRepo().commitTransaction(txStatus);

                    // TODO move into a service class --------------

                } finally {

                    clearSession();

                    refreshView(true);

                }

            } else if(event.getReason().equals(Reason.CANCEL)){

                // noting to do

            }

        }

        // ignore other editors

    }

    /**

     *

     */

    public void clearSession() {

        getRepo().clearSession();

    }

    @EventBusListenerMethod(filter = ShowDetailsEventEntityTypeFilter.RegistrationWorkingSet.class)

    public void onShowDetailsEventForRegistrationWorkingSet(ShowDetailsEvent<RegistrationWorkingSet,?> event) {

        if(event.getProperty().equals(RegistrationItem.VALIDATION_PROBLEMS)){

            List<String> messages = new ArrayList<>();

            for(RegistrationDTO dto : workingset.getRegistrationDTOs()){

                dto.getValidationProblems().forEach(m -> messages.add(dto.getSummary() + ": " + m));

            }

            getView().openDetailsPopup("Validation Problems", messages);

        }

    }

    @EventBusListenerMethod

    public void onEntityChangeEvent(EntityChangeEvent event){

        if(workingset == null){

            return;

        }

        if(Reference.class.isAssignableFrom(event.getEntityType())){

            if(workingset.getCitationUuid().equals(event.getEntityUuid())){

                if(event.isRemovedType()){

                    viewEventBus.publish(EventScope.UI, this, new NavigationEvent(StartRegistrationViewBean.NAME));

                } else {

                    refreshView(true);

                }

            }

        } else

        if(Registration.class.isAssignableFrom(event.getEntityType())){

            if(workingset.getRegistrations().stream().anyMatch(reg -> reg.getUuid() == event.getEntityUuid())){

                refreshView(true);

            }

        } else

        if(TaxonName.class.isAssignableFrom(event.getEntityType())){

            if(event.getType().equals(EntityChangeEvent.Type.CREATED)){

                Stack<EditorActionContext>context = ((AbstractPopupEditor)event.getSourceView()).getEditorActionContext();

                EditorActionContext rootContext = context.get(0);

                if(rootContext.getParentView().equals(getView()) && event.getSourceView() != newNameForRegistrationPopupEditor){

                    try {

                        clearSession();

                        // TODO move into a service class --------------

                        TransactionStatus txStatus = getRepo().startTransaction();

                        // create a blocking registration, the new Registration will be persisted

                        UUID taxonNameUUID = event.getEntityUuid();

                        Registration blockingRegistration = getRepo().getRegistrationService().createRegistrationForName(taxonNameUUID);

                        if(context.get(1).getParentView() instanceof TaxonNamePopupEditor && !((TaxonNamePopupEditor)context.get(1).getParentView()).getBean().cdmEntity().isPersited()){

                            // Oha!! The event came from a popup editor and the

                            // first popup in the context is a TaxonNameEditor with un-persisted name

                            // This is a name for a new registration which has not yet been created.

                            // It is necessary to store blocking registrations in the newNameBlockingRegistrations

                            newNameBlockingRegistrations.add(blockingRegistration);

                            logger.debug("Blocking registration created and memorized");

                        } else {

                            // some new name somehow related to an existing registration

                            Registration registration = findRegistrationInContext(context);

                            registration.getBlockedBy().add(blockingRegistration);

                            if(registration.isPersited()){

                                getRepo().getRegistrationService().saveOrUpdate(registration);

                                logger.debug("Blocking registration created, added to registion and persited");

                            }

                            getRepo().commitTransaction(txStatus);

                            // TODO move into a service class --------------

                        }

                    } finally {

                        clearSession();

                    }

                } else {

                    // in case of creating a new name for a registration the parent view is the TaxonNamePopupEditor

                    // this is set

                    logger.debug("Non blocking registration, since a new name for a new registration has been created");

                }

            }

            if(workingset.getRegistrationDTOs().stream().anyMatch(reg ->

                reg.getTypifiedNameRef() != null

                && reg.getTypifiedNameRef().getUuid().equals(event.getEntityUuid()))){

                    refreshView(true);

            }

        } else

        if(TypeDesignationBase.class.isAssignableFrom(event.getEntityType())){

            if(workingset.getRegistrationDTOs().stream().anyMatch(

                    reg -> reg.typeDesignations() != null && reg.typeDesignations().stream().anyMatch(

                            td -> td.getUuid() == event.getEntityUuid()

                            )

                        )

                    ){

                refreshView(true);

            }

        }

    }

    /**

     * @param context

     * @return

     */

    public Registration findRegistrationInContext(Stack<EditorActionContext> context) {

        EditorActionContext rootCtx = context.get(0);

        TypedEntityReference<Registration> regReference = (TypedEntityReference<Registration>)rootCtx.getParentEntity();

        Optional<RegistrationDTO> registrationDTOOptional = workingset.getRegistrationDTO(regReference.getUuid());

        if(!registrationDTOOptional.isPresent()){

            logger.error("RegistrationDTO missing in rootCtx.");

        }

        Registration registration = registrationDTOOptional.get().registration();

        if(registration.isPersited()){

             registration = getRepo().getRegistrationService().load(registration.getUuid());

             if(registration == null){

                 throw new NullPointerException("Registration not found for " + regReference + " which has been hold in the rootContext");

             }

         } else {

             logger.trace("Registration is not yet persisted.");

         }

        return registration;

    }

    @EventBusListenerMethod(filter = ShowDetailsEventEntityTypeFilter.RegistrationDTO.class)