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.taxeditor.editor.workingSet;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.UUID;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import javax.inject.Inject;

import javax.inject.Named;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.e4.core.contexts.ContextInjectionFactory;

import org.eclipse.e4.core.contexts.IEclipseContext;

import org.eclipse.e4.ui.di.Focus;

import org.eclipse.e4.ui.di.Persist;

import org.eclipse.e4.ui.model.application.ui.MDirtyable;

import org.eclipse.e4.ui.services.IServiceConstants;

import org.eclipse.e4.ui.workbench.modeling.ESelectionService;

import org.eclipse.jface.util.LocalSelectionTransfer;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.dnd.DND;

import org.eclipse.swt.dnd.Transfer;

import org.eclipse.swt.events.KeyAdapter;

import org.eclipse.swt.events.KeyEvent;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Shell;

import eu.etaxonomy.cdm.api.conversation.ConversationHolder;

import eu.etaxonomy.cdm.api.conversation.IConversationEnabled;

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

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

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

import eu.etaxonomy.cdm.model.description.FeatureTree;

import eu.etaxonomy.cdm.model.description.WorkingSet;

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

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

import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;

import eu.etaxonomy.cdm.model.taxon.TaxonNode;

import eu.etaxonomy.cdm.persistence.hibernate.CdmDataChangeMap;

import eu.etaxonomy.taxeditor.model.IDirtyMarkable;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.session.ICdmEntitySession;

import eu.etaxonomy.taxeditor.session.ICdmEntitySessionEnabled;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.dialog.selection.NamedAreaSelectionDialog;

import eu.etaxonomy.taxeditor.ui.element.CdmFormFactory;

import eu.etaxonomy.taxeditor.workbench.part.IE4SavablePart;

/**

 * Editor for configuring WorkingSets

 * @author pplitzner

 * @since Nov 21, 2017

 *

 */

public class WorkingSetEditor implements IE4SavablePart, IConversationEnabled, ICdmEntitySessionEnabled,

IPartContentHasDetails, IDirtyMarkable {

    private WorkingSetComposite composite;

    private ConversationHolder conversation;

    private ICdmEntitySession cdmEntitySession;

    private WorkingSet workingSet;

    private final int dndOperations = DND.DROP_MOVE;

    @Inject

    private MDirtyable dirty;

    @Inject

    private ESelectionService selectionService;

    private ModifyListener labelModifyListener;

    @PostConstruct

    public void create(Composite parent, IEclipseContext context, @Named(IServiceConstants.ACTIVE_SHELL)Shell shell){

        if (CdmStore.isActive()){

            if(conversation == null){

                conversation = CdmStore.createConversation();

            }

            if(cdmEntitySession == null){

                cdmEntitySession = CdmStore.getCurrentSessionManager().newSession(this, true);

            }

        }

        else{

            return;

        }

        CdmFormFactory cdmFormFactory = new CdmFormFactory(Display.getCurrent());

        ContextInjectionFactory.inject(cdmFormFactory, context);

        composite = new WorkingSetComposite(parent, SWT.NONE);

        labelModifyListener = new ModifyListener() {

            @Override

            public void modifyText(ModifyEvent e) {

                workingSet.setLabel(composite.getTxt_label().getText());

                dirty.setDirty(true);

            }

        };

        composite.getRankMin().addSelectionChangedListener(event->dirty.setDirty(true));

        composite.getRankMax().addSelectionChangedListener(event->dirty.setDirty(true));

        composite.getBtnChooseArea().addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {

                NamedArea area = NamedAreaSelectionDialog.select(shell, null, null);

                if(area!=null){

                    composite.setArea(area);

                }

                dirty.setDirty(true);

            }

        });

        composite.getBtnRemoveArea().addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(org.eclipse.swt.events.SelectionEvent e) {

                composite.removeArea();

                dirty.setDirty(true);

            }

        });

        composite.getFeatureTreeEditorComposite().init(null, null, e->selectionService.setSelection(e.getSelection()), null, null);

        //add drag'n'drop support

        Transfer[] transfers = new Transfer[] {LocalSelectionTransfer.getTransfer()};

        composite.getTaxonNodeTree().addDropSupport(dndOperations, transfers, new TaxonNodeDropAdapter(this));

        composite.getTaxonNodeTree().getTree().addKeyListener(new KeyAdapter() {

            @Override

            public void keyPressed(KeyEvent e) {

                if(e.character==SWT.DEL){

                    IStructuredSelection selection = (IStructuredSelection) composite.getTaxonNodeTree().getSelection();

                    Iterator<TaxonNode> iterator = selection.iterator();

                    while(iterator.hasNext()){

                        TaxonNode taxonNode = iterator.next();

                        removeTaxonNode(taxonNode);

                    }

                }

            }

        });

    }

    public void init(UUID workingSetUuid) {

        this.workingSet = CdmStore.getService(IWorkingSetService.class).load(workingSetUuid);

        if(workingSet.getLabel()!=null){

            composite.getTxt_label().setText(workingSet.getLabel());

        }

        if(workingSet.getDescriptiveSystem()!=null){

            composite.setCharacters(workingSet.getDescriptiveSystem());

        }

        Rank maxRank = workingSet.getMaxRank();

        if(maxRank!=null){

            composite.setRankMax(maxRank);

        }

        Rank minRank = workingSet.getMinRank();

        if(minRank!=null){

            composite.setRankMin(minRank);

        }

        Set<NamedArea> geoFilter = workingSet.getGeoFilter();

        if(geoFilter!=null && !geoFilter.isEmpty()){

            composite.setArea(geoFilter.iterator().next());

        }

        Set<TaxonNode> taxonSubtreeFilter = workingSet.getTaxonSubtreeFilter();

        if(taxonSubtreeFilter!=null){

            composite.getTaxonNodeTree().setInput(taxonSubtreeFilter);

        }

        composite.getTxt_label().addModifyListener(labelModifyListener);

    }

    public void addTaxonNode(TaxonNode taxonNode){

        //load into WS editor session

        taxonNode = getCdmEntitySession().load(taxonNode, false);

        Viewer taxonTreeViewer = getTaxonTreeViewer();

        Object input = taxonTreeViewer.getInput();

        Collection<TaxonNode> treeNodes;

        if(input==null){

            treeNodes = new ArrayList<>();

        }

        else{

            treeNodes = (Collection<TaxonNode>) input;

        }

        treeNodes.add(taxonNode);

        taxonTreeViewer.setInput(treeNodes);

        dirty.setDirty(true);

    }

    private void removeTaxonNode(TaxonNode taxonNode){

        Viewer taxonTreeViewer = getTaxonTreeViewer();

        Collection<TaxonNode> input = (Collection<TaxonNode>) taxonTreeViewer.getInput();

        input.remove(taxonNode);

        taxonTreeViewer.setInput(input);

        dirty.setDirty(true);

    }

    @Persist

    @Override

    public void save(IProgressMonitor monitor) {

        NamedArea area = composite.getArea();

        Set<NamedArea> areas = new HashSet<>();

        if(area!=null){

            areas.add(area);

        }

        Object input = composite.getTaxonNodeTree().getInput();

        if(input!=null){

            workingSet.setTaxonSubtreeFilter(new HashSet<>());//clear existing filter

            Collection<ITaxonTreeNode> taxonNodes = (Collection<ITaxonTreeNode>) input;

            for (ITaxonTreeNode taxonTreeNode : taxonNodes) {

                if(taxonTreeNode instanceof TaxonNode){

                    TaxonNode taxonNode = (TaxonNode)taxonTreeNode;

                    workingSet.addTaxonSubtree(taxonNode);

                }

            }

        }

        FeatureTree characters = composite.getCharacters();

        if(characters!=null){

            //save characters because they can be modified in this editor

            characters.getDistinctFeatures().forEach(character->CdmStore.getService(ITermService.class).merge(character,true));

        }

        DefinedTermBase rankMaxSelection = composite.getRankMax().getSelection();

        Rank rankMax = null;

        if(rankMaxSelection instanceof Rank){

            rankMax = (Rank) rankMaxSelection;

        }

        DefinedTermBase rankMinSelection = composite.getRankMin().getSelection();

        Rank rankMin = null;

        if(rankMinSelection instanceof Rank){

            rankMin = (Rank) rankMinSelection;

        }

        workingSet.setMaxRank(rankMax);

        workingSet.setMinRank(rankMin);

        workingSet.setDescriptiveSystem(characters);

        workingSet.setGeoFilter(areas);

        conversation.commit();

        CdmStore.getService(IWorkingSetService.class).merge(workingSet, true);

        dirty.setDirty(false);

    }

    @PreDestroy

    public void dispose() {

        if (conversation != null) {

            conversation.close();

            conversation = null;

        }

        if(cdmEntitySession != null) {

            cdmEntitySession.dispose();

            cdmEntitySession = null;

        }

        dirty.setDirty(false);

    }

    @Focus

    public void setFocus() {

        if (getConversationHolder() != null) {

            getConversationHolder().bind();

        }

        if(cdmEntitySession != null) {

            cdmEntitySession.bind();

        }

    }

    public Viewer getTaxonTreeViewer() {

        return composite.getTaxonNodeTree();

    }

    public WorkingSet getWorkingSet() {

        return workingSet;

    }

    @Override

    public void update(CdmDataChangeMap arg0) {

    }

    @Override

    public ICdmEntitySession getCdmEntitySession() {

        return cdmEntitySession;

    }

    @Override

    public Collection<WorkingSet> getRootEntities() {

        return null;

    }

    @Override

    public Map<Object, List<String>> getPropertyPathsMap() {

        return null;

    }

    @Override

    public ConversationHolder getConversationHolder() {

        return conversation;

    }

    @Override

    public void changed(Object element) {

        dirty.setDirty(true);

    }

    @Override

    public void forceDirty() {

        dirty.setDirty(true);

    }

}