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.name;

import java.util.Arrays;

import java.util.EnumSet;

import java.util.HashSet;

import java.util.Set;

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

import org.springframework.context.event.EventListener;

import org.vaadin.viritin.fields.AbstractElementCollection;

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

import eu.etaxonomy.cdm.cache.CdmEntityCache;

import eu.etaxonomy.cdm.cache.EntityCache;

import eu.etaxonomy.cdm.model.location.Country;

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

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

import eu.etaxonomy.cdm.model.occurrence.Collection;

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

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

import eu.etaxonomy.cdm.service.CdmFilterablePagingProvider;

import eu.etaxonomy.cdm.service.CdmStore;

import eu.etaxonomy.cdm.service.ISpecimenTypeDesignationWorkingSetService;

import eu.etaxonomy.cdm.vaadin.component.CdmBeanItemContainerFactory;

import eu.etaxonomy.cdm.vaadin.component.CollectionRowItemCollection;

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

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

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

import eu.etaxonomy.cdm.vaadin.model.registration.RegistrationTermLists;

import eu.etaxonomy.cdm.vaadin.model.registration.SpecimenTypeDesignationDTO;

import eu.etaxonomy.cdm.vaadin.model.registration.SpecimenTypeDesignationWorkingSetDTO;

import eu.etaxonomy.cdm.vaadin.security.UserHelper;

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

import eu.etaxonomy.cdm.vaadin.view.occurrence.CollectionPopupEditor;

import eu.etaxonomy.vaadin.component.ToOneRelatedEntityCombobox;

import eu.etaxonomy.vaadin.mvp.AbstractEditorPresenter;

import eu.etaxonomy.vaadin.mvp.AbstractPopupEditor;

/**

 * SpecimenTypeDesignationWorkingsetPopupEditorView implementation must override the showInEditor() method,

 * see {@link #prepareAsFieldGroupDataSource()} for details.

 *

 * @author a.kohlbecker

 * @since Jun 13, 2017

 *

 */

public class SpecimenTypeDesignationWorkingsetEditorPresenter

    extends AbstractEditorPresenter<SpecimenTypeDesignationWorkingSetDTO , SpecimenTypeDesignationWorkingsetPopupEditorView>

    implements CachingPresenter {

    private static final long serialVersionUID = 4255636253714476918L;

    private static final EnumSet<CRUD> COLLECTION_EDITOR_CRUD = EnumSet.of(CRUD.UPDATE, CRUD.DELETE);

    CdmStore<Registration, IRegistrationService> store;

    /**

     * This object for this field will either be injected by the {@link PopupEditorFactory} or by a Spring

     * {@link BeanFactory}

     */

    @Autowired

    private ISpecimenTypeDesignationWorkingSetService specimenTypeDesignationWorkingSetService;

    /**

     * if not null, this CRUD set is to be used to create a CdmAuthoritiy for the base entitiy which will be

     * granted to the current use as long this grant is not assigned yet.

     */

    private EnumSet<CRUD> crud = null;

    private CdmEntityCache cache = null;

    SpecimenTypeDesignationWorkingSetDTO<Registration> workingSetDto;

    private CollectionPopupEditor collectionPopuEditor;

    private Set<CollectionRowItemCollection> collectionPopuEditorSourceRows = new HashSet<>();

    protected CdmStore<Registration, IRegistrationService> getStore() {

        if(store == null){

            store = new CdmStore<>(getRepo(), getRepo().getRegistrationService());

        }

        return store;

    }

    /**

     * Loads an existing working set from the database. This process actually involves

     * loading the Registration specified by the <code>RegistrationAndWorkingsetId.registrationId</code> and in

     * a second step to find the workingset by the <code>registrationAndWorkingsetId.workingsetId</code>.

     * <p>

     * The <code>identifier</code> must be of the type {@link TypeDesignationWorkingsetEditorIdSet} whereas the field <code>egistrationId</code>

     * must be present, the field <code>workingsetId</code>,  however can be null. I this case a new workingset with a new {@link FieldUnit} as

     * base entity is being created.

     *

     * @param identifier a {@link TypeDesignationWorkingsetEditorIdSet}

     */

    @Override

    protected SpecimenTypeDesignationWorkingSetDTO<Registration> loadBeanById(Object identifier) {

        if(identifier != null){

            TypeDesignationWorkingsetEditorIdSet idset = (TypeDesignationWorkingsetEditorIdSet)identifier;

            if(idset.workingsetId != null){

                workingSetDto = specimenTypeDesignationWorkingSetService.loadDtoByIds(idset.registrationId, idset.workingsetId);

                if(workingSetDto.getFieldUnit() == null){

                    workingSetDto = specimenTypeDesignationWorkingSetService.fixMissingFieldUnit(workingSetDto);

                        // FIXME open Dialog to warn user about adding an empty fieldUnit to the typeDesignations

                        //       This method must go again into the presenter !!!!

                        logger.info("Basing all typeDesignations on a new fieldUnit");

                }

                cache = new CdmEntityCache(workingSetDto.getOwner());

            } else {

                // create a new workingset, for a new fieldunit which is the base for the workingset

                workingSetDto = specimenTypeDesignationWorkingSetService.create(idset.registrationId, idset.publicationId, idset.typifiedNameId);

                cache = new CdmEntityCache(workingSetDto.getOwner());

            }

        } else {

            workingSetDto = null;

        }

        return workingSetDto;

    }

    /**

     * {@inheritDoc}

     */

    @SuppressWarnings("serial")

    @Override

    public void handleViewEntered() {

        CdmBeanItemContainerFactory selectFactory = new CdmBeanItemContainerFactory(getRepo());

        getView().getCountrySelectField().setContainerDataSource(selectFactory.buildBeanItemContainer(Country.uuidCountryVocabulary));

        getView().getTypeDesignationsCollectionField().addElementRemovedListener(e -> deleteTypeDesignation(e.getElement()));

        getView().getTypeDesignationsCollectionField().addElementAddedListener(e -> addTypeDesignation(e.getElement()));

        collectionPopuEditorSourceRows.clear();

        getView().getTypeDesignationsCollectionField().setEditorInstantiator(new AbstractElementCollection.Instantiator<SpecimenTypeDesignationDTORow>() {

            CdmFilterablePagingProvider<Collection, Collection> collectionPagingProvider = new CdmFilterablePagingProvider<Collection, Collection>(getRepo().getCollectionService());

            CdmFilterablePagingProvider<Reference, Reference> referencePagingProvider = new CdmFilterablePagingProvider<Reference, Reference>(getRepo().getReferenceService());

            @Override

            public SpecimenTypeDesignationDTORow create() {

                SpecimenTypeDesignationDTORow row = new SpecimenTypeDesignationDTORow();

                row.kindOfUnit.setContainerDataSource(selectFactory.buildTermItemContainer(

                        RegistrationTermLists.KIND_OF_UNIT_TERM_UUIDS())

                        );

                row.kindOfUnit.setNullSelectionAllowed(false);

                row.typeStatus.setContainerDataSource(selectFactory.buildTermItemContainer(

                        RegistrationTermLists.SPECIMEN_TYPE_DESIGNATION_STATUS_UUIDS())

                        );

                row.typeStatus.setNullSelectionAllowed(false);

                row.collection.loadFrom(

                        collectionPagingProvider,

                        collectionPagingProvider,

                        collectionPagingProvider.getPageSize()

                        );

                row.collection.getSelect().setCaptionGenerator(new CdmTitleCacheCaptionGenerator<Collection>());

                row.collection.getSelect().addValueChangeListener(new ToOneRelatedEntityButtonUpdater<Collection>(row.collection));

                row.collection.getSelect().addValueChangeListener(new ToOneRelatedEntityReloader<Collection>(row.collection.getSelect(),

                        SpecimenTypeDesignationWorkingsetEditorPresenter.this));

                row.collection.addClickListenerAddEntity( e -> doCollectionEditorAdd());

                row.collection.addClickListenerEditEntity(e -> {

                        if(row.collection.getValue() != null){

                            doCollectionEditorEdit(row.collection.getValue().getId());

                        }

                    });

                row.mediaSpecimenReference.loadFrom(

                        referencePagingProvider,

                        referencePagingProvider,

                        collectionPagingProvider.getPageSize()

                        );

                row.mediaSpecimenReference.getSelect().setCaptionGenerator(new CdmTitleCacheCaptionGenerator<Reference>());

                row.mediaSpecimenReference.getSelect().addValueChangeListener(new ToOneRelatedEntityButtonUpdater<Reference>(row.mediaSpecimenReference));

                row.mediaSpecimenReference.getSelect().addValueChangeListener(new ToOneRelatedEntityReloader<Reference>(row.mediaSpecimenReference.getSelect(),

                        SpecimenTypeDesignationWorkingsetEditorPresenter.this));

                getView().applyDefaultComponentStyle(row.components());

                collectionPopuEditorSourceRows.add(row);

                return row;

            }

        });

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void saveBean(SpecimenTypeDesignationWorkingSetDTO dto) {

        if(crud != null){

            UserHelper.fromSession().createAuthorityForCurrentUser(dto.getFieldUnit(), crud, null);

        }

        specimenTypeDesignationWorkingSetService.save(dto);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void deleteBean(SpecimenTypeDesignationWorkingSetDTO bean) {

        specimenTypeDesignationWorkingSetService.delete(bean, true);

    }

    /**

     * @param element

     * @return

     */

    private void addTypeDesignation(SpecimenTypeDesignationDTO element) {

        getView().updateAllowDelete();

    }

    /**

     * In this method the SpecimenTypeDesignation is dissociated from the Registration.

     * The actual deletion of the SpecimenTypeDesignation and DerivedUnit will take place in {@link #saveBean(SpecimenTypeDesignationWorkingSetDTO)}

     *

     * TODO once https://dev.e-taxonomy.eu/redmine/issues/7077 is fixed dissociating from the Registration could be removed here

     *

     * @param e

     * @return

     */

    private void deleteTypeDesignation(SpecimenTypeDesignationDTO element) {

        Registration reg = workingSetDto.getOwner();

        SpecimenTypeDesignation std = element.asSpecimenTypeDesignation();

        reg.getTypeDesignations().remove(std);

        getView().updateAllowDelete();

    }

    /**

     * @param crud

     */

    public void setGrantsForCurrentUser(EnumSet<CRUD> crud) {

        this.crud = crud;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public EntityCache getCache() {

        if(((AbstractPopupEditor)getView()).isBeanLoaded()){

            return cache;

        } else {

            return null;

        }

    }

    public void doCollectionEditorAdd() {

        collectionPopuEditor = getNavigationManager().showInPopup(CollectionPopupEditor.class);

        collectionPopuEditor.grantToCurrentUser(COLLECTION_EDITOR_CRUD);

        collectionPopuEditor.withDeleteButton(true);

        collectionPopuEditor.loadInEditor(null);

    }

    public void doCollectionEditorEdit(int collectionId) {

        collectionPopuEditor = getNavigationManager().showInPopup(CollectionPopupEditor.class);

        collectionPopuEditor.grantToCurrentUser(COLLECTION_EDITOR_CRUD);

        collectionPopuEditor.withDeleteButton(true);

        collectionPopuEditor.loadInEditor(collectionId);

    }

    @EventListener(condition = "#event.entityType == T(eu.etaxonomy.cdm.model.occurrence.Collection)")

    public void onCollectionEvent(EntityChangeEvent event){

        Collection newCollection = getRepo().getCollectionService().load(event.getEntityId(), Arrays.asList(new String[]{"$.institute"}));

        cache.findAndUpdate(newCollection);

        for( CollectionRowItemCollection row : collectionPopuEditorSourceRows) {

            ToOneRelatedEntityCombobox<Collection> combobox = row.getComponent(ToOneRelatedEntityCombobox.class, 2);

            combobox.reload();

        }

    }

}