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.EnumSet;

import java.util.UUID;

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

import org.vaadin.spring.events.EventScope;

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

import org.vaadin.viritin.fields.LazyComboBox;

import com.vaadin.server.SystemError;

import com.vaadin.server.UserError;

import com.vaadin.spring.annotation.SpringComponent;

import com.vaadin.spring.annotation.ViewScope;

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

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

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.service.CdmFilterablePagingProvider;

import eu.etaxonomy.cdm.service.CdmFilterablePagingProviderFactory;

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

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

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

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

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

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

import eu.etaxonomy.vaadin.mvp.AbstractEditorPresenter;

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 Jul 11, 2017

 *

 */

@SpringComponent

@ViewScope

public class StartRegistrationPresenter extends AbstractEditorPresenter<RegistrationDTO, StartRegistrationView> {

    private static final long serialVersionUID = 2283189121081612574L;

    private ReferencePopupEditor newReferencePopup;

    private Reference newReference;

    private boolean registrationInProgress;

    @Autowired

    protected CdmFilterablePagingProviderFactory pagingProviderFactory;

    public StartRegistrationPresenter (){

        super();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void handleViewEntered() {

        super.handleViewEntered();

        CdmFilterablePagingProvider<Reference, Reference> pagingProvider = pagingProviderFactory.referencePagingProvider();

        CdmTitleCacheCaptionGenerator<Reference> titleCacheGenrator = new CdmTitleCacheCaptionGenerator<Reference>();

        getView().getReferenceCombobox().setCaptionGenerator(titleCacheGenrator);

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

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void handleViewExit() {

        if(!registrationInProgress && newReference != null){

            logger.info("Deleting newly created Reference due to canceled registration");

            getRepo().getReferenceService().delete(newReference);

        }

        super.handleViewExit();

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

    public void onReferenceEditorActionAdd(ReferenceEditorAction event) {

        if(getView() == null || getView().getNewPublicationButton() != event.getSource()){

            return;

        }

        newReferencePopup = openPopupEditor(ReferencePopupEditor.class, event);

        EnumSet<ReferenceType> refTypes = RegistrationUIDefaults.PRINTPUB_REFERENCE_TYPES.clone();

        refTypes.remove(ReferenceType.Section);

        newReferencePopup.withReferenceTypes(refTypes);

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

        newReferencePopup.withDeleteButton(true);

        newReferencePopup.loadInEditor(null);

        newReferencePopup.getTypeSelect().setValue(ReferenceType.Article);

    }

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Remove.class)

    public void onReferenceEditorActionRemove(ReferenceEditorAction event) {

        if(getView().getRemoveNewPublicationButton() != event.getSource()){

            return;

        }

        DeleteResult result = getRepo().getReferenceService().delete(newReference);

        if(!result.isOk()){

            String message = "";

            for(Exception e : result.getExceptions()){

                message += e.getMessage() + "\n" + e.getStackTrace().toString() + "\n";

            }

            getView().getRemoveNewPublicationButton().setComponentError(new SystemError(message));

        }

        getView().getReferenceCombobox().setEnabled(false);

        getView().getRemoveNewPublicationButton().setVisible(false);

        getView().getNewPublicationButton().setVisible(true);

        getView().getNewPublicationLabel().setCaption(null);

        getView().getNewPublicationLabel().setVisible(false);

    }

    @EventBusListenerMethod

    public void onDoneWithPopupEvent(DoneWithPopupEvent event){

        if(event.getPopup() == newReferencePopup){

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

                newReference = newReferencePopup.getBean();

                // TODO the bean contained in the popup editor is not yet updated at this point.

                //      so re reload it using the uuid since new beans will not have an Id at this point.

                newReference = getRepo().getReferenceService().find(newReference.getUuid());

                getView().getReferenceCombobox().setValue(null);  // deselect

                getView().getReferenceCombobox().setEnabled(false);

                getView().getContinueButton().setEnabled(true);

                getView().getNewPublicationButton().setVisible(false);

                getView().getRemoveNewPublicationButton().setVisible(true);

                getView().getNewPublicationLabel().setCaption(newReference.getTitleCache());

                getView().getNewPublicationLabel().setVisible(true);

            }

            newReferencePopup = null;

        }

    }

    @SuppressWarnings("null")

    @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

    public void onRegistrationEditorActionAdd(RegistrationEditorAction event) {

        if(getView().getContinueButton() != event.getSource()){

            return;

        }

        UUID referenceUuid = null;

        LazyComboBox<Reference> referenceCombobox = getView().getReferenceCombobox();

        referenceCombobox.commit();

        if(newReference != null){

            referenceUuid = newReference.getUuid();

       // } else if(referenceCombobox.getValue() != null) {

        } else if ( event.getEntityUuid() != null) { // HACKED, see view implementation

            referenceUuid = event.getEntityUuid();

        }

        if(referenceUuid == null){

            getView().getContinueButton().setComponentError(new UserError("Can't continue. No Reference is chosen."));

            getView().getContinueButton().setEnabled(false);

        }

        registrationInProgress = true;

        viewEventBus.publish(EventScope.UI, this, new NavigationEvent(RegistrationWorksetViewBean.NAME, referenceUuid.toString()));

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected RegistrationDTO loadBeanById(Object identifier) {

        // not needed //

        return null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void saveBean(RegistrationDTO bean) {

        // not needed //

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void deleteBean(RegistrationDTO bean) {

        // not needed //

    }

}