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.reference;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.EnumSet;

import java.util.List;

import java.util.Set;

import java.util.UUID;

import org.apache.log4j.Logger;

import org.springframework.context.annotation.Scope;

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

import org.vaadin.viritin.fields.CaptionGenerator;

import com.vaadin.spring.annotation.SpringComponent;

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

import eu.etaxonomy.cdm.model.agent.AgentBase;

import eu.etaxonomy.cdm.model.agent.Institution;

import eu.etaxonomy.cdm.model.agent.Person;

import eu.etaxonomy.cdm.model.agent.TeamOrPersonBase;

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

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

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

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

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

import eu.etaxonomy.cdm.persistence.dao.common.Restriction;

import eu.etaxonomy.cdm.persistence.dao.common.Restriction.Operator;

import eu.etaxonomy.cdm.service.CdmFilterablePagingProvider;

import eu.etaxonomy.cdm.service.UserHelperAccess;

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

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

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

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

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

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

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

import eu.etaxonomy.cdm.vaadin.view.common.InstitutionPopupEditor;

import eu.etaxonomy.vaadin.component.ToOneRelatedEntityField;

import eu.etaxonomy.vaadin.mvp.AbstractCdmEditorPresenter;

import eu.etaxonomy.vaadin.mvp.BeanInstantiator;

import eu.etaxonomy.vaadin.mvp.BoundField;

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

/**

 * @author a.kohlbecker

 * @since Apr 5, 2017

 *

 */

@SpringComponent

@Scope("prototype")

public class ReferenceEditorPresenter extends AbstractCdmEditorPresenter<Reference, ReferencePopupEditorView> {

    private static final long serialVersionUID = -7926116447719010837L;

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

    ReferencePopupEditor inReferencePopup = null;

    CdmFilterablePagingProvider<Reference, Reference> inReferencePagingProvider;

    Restriction<UUID> includeCurrentInReference;

    public ReferenceEditorPresenter() {

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void handleViewEntered() {

        super.handleViewEntered();

        getView().getTypeSelect().addValueChangeListener(e -> updateInReferencePageProvider());

        getView().getInReferenceCombobox().getSelect().setCaptionGenerator(new CaptionGenerator<Reference>(){

            @Override

            public String getCaption(Reference option) {

                return option.getTitleCache();

            }

        });

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

        getView().getInReferenceCombobox().loadFrom(collectionPagingProvider, collectionPagingProvider, collectionPagingProvider.getPageSize());

        getView().getInReferenceCombobox().setNestedButtonStateUpdater(new ToOneRelatedEntityButtonUpdater<Reference>(getView().getInReferenceCombobox()));

        getView().getInReferenceCombobox().getSelect().addValueChangeListener(new ToOneRelatedEntityReloader<Reference>(getView().getInReferenceCombobox(),this));

        CdmFilterablePagingProvider<AgentBase, TeamOrPersonBase> teamOrPersonPagingProvider = new CdmFilterablePagingProvider<AgentBase, TeamOrPersonBase>(getRepo().getAgentService(), TeamOrPersonBase.class);

        CdmFilterablePagingProvider<AgentBase, Person> personPagingProvider = new CdmFilterablePagingProvider<AgentBase, Person>(getRepo().getAgentService(), Person.class);

        getView().getAuthorshipField().setFilterableTeamPagingProvider(teamOrPersonPagingProvider, this);

        getView().getAuthorshipField().setFilterablePersonPagingProvider(personPagingProvider, this);

        CdmFilterablePagingProvider<AgentBase, Institution> institutionPagingProvider = new CdmFilterablePagingProvider<AgentBase, Institution>(getRepo().getAgentService(), Institution.class);

        getView().getInstitutionCombobox().getSelect().loadFrom(institutionPagingProvider, institutionPagingProvider, institutionPagingProvider.getPageSize());

        getView().getInstitutionCombobox().getSelect().addValueChangeListener(new ToOneRelatedEntityReloader<Institution>(getView().getInstitutionCombobox(), this));

        getView().getSchoolCombobox().getSelect().loadFrom(institutionPagingProvider, institutionPagingProvider, institutionPagingProvider.getPageSize());

        getView().getSchoolCombobox().getSelect().addValueChangeListener(new ToOneRelatedEntityReloader<Institution>(getView().getSchoolCombobox(), this));

        getView().getAnnotationsField().setAnnotationTypeItemContainer(cdmBeanItemContainerFactory.buildTermItemContainer(

                AnnotationType.EDITORIAL().getUuid(), AnnotationType.TECHNICAL().getUuid()));

    }

    /**

     * @param inReferencePagingProvider

     */

    public void updateInReferencePageProvider() {

        inReferencePagingProvider = pagingProviderFactory.inReferencePagingProvider((ReferenceType) getView().getTypeSelect().getValue(), false);

        Reference inReference = getView().getInReferenceCombobox().getValue();

        if(inReference != null){

            if(includeCurrentInReference == null){

                includeCurrentInReference = new Restriction<UUID>("uuid", Operator.OR, null, inReference.getUuid());

            }

            inReferencePagingProvider.addRestriction(includeCurrentInReference);

        } else {

            inReferencePagingProvider.getRestrictions().remove(includeCurrentInReference);

            includeCurrentInReference = null;

        }

        getView().getInReferenceCombobox().reload();

        getView().getInReferenceCombobox().loadFrom(inReferencePagingProvider, inReferencePagingProvider, inReferencePagingProvider.getPageSize());

    }

    protected static BeanInstantiator<Reference> defaultBeanInstantiator = new BeanInstantiator<Reference>() {

        @Override

        public Reference createNewBean() {

            return ReferenceFactory.newGeneric();

        }

    };

    @Override

    protected BeanInstantiator<Reference> defaultBeanInstantiator(){

       return defaultBeanInstantiator;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Reference loadCdmEntity(UUID identifier) {

        List<String> initStrategy = Arrays.asList(new String []{

                "$",

                "annotations.*", // needed as log as we are using a table in FilterableAnnotationsField

                }

        );

        Reference reference;

        if(identifier != null){

            reference = getRepo().getReferenceService().load(identifier, initStrategy);

        } else {

            reference = createNewBean();

        }

        return reference;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void guaranteePerEntityCRUDPermissions(UUID identifier) {

        if(crud != null){

            newAuthorityCreated = UserHelperAccess.userHelper().createAuthorityForCurrentUser(Reference.class, identifier, crud, null);

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void guaranteePerEntityCRUDPermissions(Reference bean) {

        if(crud != null){

            newAuthorityCreated = UserHelperAccess.userHelper().createAuthorityForCurrentUser(bean, crud, null);

        }

    }

    /**

    *

    * @param editorAction

    * @throws EditorEntityBeanException

    */

   @EventBusListenerMethod

   public void onReferenceEditorAction(ReferenceEditorAction editorAction) {

       if(!isFromOwnView(editorAction) || editorAction.getTarget() == null){

           return;

       }

       if(ToOneRelatedEntityField.class.isAssignableFrom(editorAction.getTarget().getClass())){

           Set<ReferenceType> applicableTypes = ReferenceType.inReferenceContraints((ReferenceType) getView().getTypeSelect().getValue());

           if(editorAction.isAddAction()){

               inReferencePopup = openPopupEditor(ReferencePopupEditor.class, editorAction);

               if(!applicableTypes.isEmpty()){

                   inReferencePopup.withReferenceTypes(EnumSet.copyOf(applicableTypes));

               }

               inReferencePopup.loadInEditor(null);

               if(!applicableTypes.isEmpty()){

                   inReferencePopup.getTypeSelect().setValue(applicableTypes.iterator().next());

               }

           }

           if(editorAction.isEditAction()){

               inReferencePopup = openPopupEditor(ReferencePopupEditor.class, editorAction);

               if(!applicableTypes.isEmpty()){

                   inReferencePopup.withReferenceTypes(EnumSet.copyOf(applicableTypes));

               }

               inReferencePopup.withDeleteButton(true);

               inReferencePopup.loadInEditor(editorAction.getEntityUuid());

           }

       }

   }

   @EventBusListenerMethod(filter = EditorActionTypeFilter.Edit.class)

   public void onInstitutionEditorActionEdit(InstitutionEditorAction event) {

       if(!checkFromOwnView(event)){

           return;

       }

       InstitutionPopupEditor institutionPopuEditor = openPopupEditor(InstitutionPopupEditor.class, event);

       institutionPopuEditor.grantToCurrentUser(this.crud);

       institutionPopuEditor.withDeleteButton(true);

       institutionPopuEditor.loadInEditor(event.getEntityUuid());

   }

   @EventBusListenerMethod(filter = EditorActionTypeFilter.Add.class)

   public void onInstitutionEditorActionAdd(InstitutionEditorAction event) {

       if(!checkFromOwnView(event)){

           return;

       }

       InstitutionPopupEditor institutionPopuEditor = openPopupEditor(InstitutionPopupEditor.class, event);

       institutionPopuEditor.grantToCurrentUser(this.crud);

       institutionPopuEditor.withDeleteButton(false);

       institutionPopuEditor.loadInEditor(null);

   }

   @EventBusListenerMethod

   public void onEntityChangeEvent(EntityChangeEvent<?> event){

       BoundField boundTargetField = boundTargetField((PopupView) event.getSourceView());

       if(boundTargetField != null){

           if(boundTargetField.matchesPropertyIdPath("inReference")){

               if(event.isCreateOrModifiedType()){

                   Reference inReference = (Reference)getCache().load(event.getEntity());

                   getView().getInReferenceCombobox().reload();

                   if(event.getType() == Type.CREATED){

                       getView().getInReferenceCombobox().setValue(inReference);

                   }

               }

               if(event.isRemovedType()){

                   getView().getInReferenceCombobox().selectNewItem(null);

               }

               inReferencePopup = null;

           }

           else if(boundTargetField.matchesPropertyIdPath("institute")){

               if(event.isCreateOrModifiedType()){

                   Institution newInstitution = (Institution) event.getEntity();

                   getCache().load(newInstitution);

                   if(event.isCreatedType()){

                       getView().getInstitutionCombobox().setValue(newInstitution);

                   } else {

                       getView().getInstitutionCombobox().reload();

                   }

               }

           } else if(boundTargetField.matchesPropertyIdPath("school")){

               if(event.isCreateOrModifiedType()){

                   Institution newInstitution = (Institution) event.getEntity();

                   getCache().load(newInstitution);

                   if(event.isCreatedType()){

                       getView().getSchoolCombobox().setValue(newInstitution);

                   } else {

                       getView().getSchoolCombobox().reload();

                   }

               }

           }

       }

   }

    /**

     * {@inheritDoc}

     */

    @Override

    protected IService<Reference> getService() {

        return getRepo().getReferenceService();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Reference preSaveBean(Reference bean) {

        // handle annotation changes

        List<Annotation> annotations = getView().getAnnotationsField().getValue();

        List<Annotation> currentAnnotations = new ArrayList<>(bean.getAnnotations());

        List<Annotation> annotationsSeen = new ArrayList<>();

        for(Annotation a : annotations){

            if(a == null){

                continue;

            }

            if(!currentAnnotations.contains(a)){

                bean.addAnnotation(a);

            }

            annotationsSeen.add(a);

        }

        for(Annotation a : currentAnnotations){

            if(!annotationsSeen.contains(a)){

                bean.removeAnnotation(a);

            }

        }

        return bean;

    }

}