EDIT

// $Id$

/**

* Copyright (C) 2007 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.view.descriptive.handler;

import java.util.ArrayList;

import java.util.List;

import java.util.UUID;

import org.eclipse.core.commands.AbstractHandler;

import org.eclipse.core.commands.ExecutionEvent;

import org.eclipse.core.commands.ExecutionException;

import org.eclipse.core.commands.common.NotDefinedException;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.widgets.Display;

import org.eclipse.ui.PartInitException;

import org.eclipse.ui.handlers.HandlerUtil;

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

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

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

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

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

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

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

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

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

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;

import eu.etaxonomy.taxeditor.editor.Page;

import eu.etaxonomy.taxeditor.editor.name.TaxonNameEditor;

import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.MoveDescriptionElementsOperation;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.FeatureNodeContainer;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;

import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;

import eu.etaxonomy.taxeditor.store.CdmStore;

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

/**

 * @author n.hoffmann

 * @created Feb 8, 2011

 * @version 1.0

 */

public class MoveDescriptionElementsHandler extends AbstractHandler implements IPostOperationEnabled{

	private UUID newAcceptedTaxonNodeUuid;

	private TaxonNameEditor editor;

	@Override

	public Object execute(ExecutionEvent event) throws ExecutionException {

//		ConversationHolder conversation = CdmStore.createConversation();

		editor = (TaxonNameEditor) EditorUtil.getActiveEditorPage(Page.NAME);

		ISelection selection = HandlerUtil.getCurrentSelection(event);

		Taxon actualTaxon= null;

		if(selection instanceof IStructuredSelection){

			IStructuredSelection structuredSelection = (IStructuredSelection) selection;

			List<DescriptionElementBase> elements = new ArrayList<DescriptionElementBase>();

			for(Object element : structuredSelection.toArray()){

				if(element instanceof DescriptionElementBase){

					UUID uuid = ((DescriptionElementBase) element).getUuid();

					elements.add(CdmStore.getService(IDescriptionService.class).loadDescriptionElement(uuid, null));

				} else if(element instanceof FeatureNodeContainer){

					for(DescriptionElementBase de : ((FeatureNodeContainer)element).getDescriptionElements()){

						elements.add(

								CdmStore.getService(IDescriptionService.class).loadDescriptionElement(de.getUuid(), null)

							);

					}

				}

			}

			if(elements.size() == 0){

				return null;

			}

			DescriptionBase description = elements.get(0).getInDescription();

			List<UUID> excludeTaxa = new ArrayList<UUID>();

			if (description.isInstanceOf(TaxonDescription.class)){

				TaxonDescription taxonDescription = HibernateProxyHelper.deproxy(description, TaxonDescription.class);

				actualTaxon = taxonDescription.getTaxon();

				excludeTaxa.add(actualTaxon.getUuid());

			}

			Classification classification = null;

			if (actualTaxon != null){

			    if (!actualTaxon.getTaxonNodes().isEmpty() && actualTaxon.getTaxonNodes().size() ==1){

			        classification = actualTaxon.getTaxonNodes().iterator().next().getClassification();

			    }

			}

			TaxonNode newAcceptedTaxonNode = TaxonNodeSelectionDialog.select(HandlerUtil.getActiveShell(event),

					editor.getConversationHolder(),

					"Choose the accepted taxon",

					excludeTaxa,

					null,classification

					);

			if (newAcceptedTaxonNode != null){

    			Taxon targetTaxon = newAcceptedTaxonNode.getTaxon();

    			if(targetTaxon == null){

    				// canceled

    				return null;

    			}

    			newAcceptedTaxonNodeUuid = newAcceptedTaxonNode.getUuid();

    			String moveMessage = String.format("Elements moved from %s", EditorUtil.getActiveMultiPageTaxonEditor().getTaxon());

    			try {

    				AbstractPostOperation operation = new MoveDescriptionElementsOperation(

    						event.getCommand().getName(), EditorUtil.getUndoContext(),

    						targetTaxon.getUuid(), moveMessage, elements, false, this);

    				AbstractUtility.executeOperation(operation);

    				//CdmStore.getService(ITaxonService.class).saveOrUpdate(targetTaxon);

    			} catch (NotDefinedException e) {

    				MessagingUtils.error(getClass(), e);

    			}

			}

		}

		return null;

	}

	/** {@inheritDoc} */

	@Override

    public boolean postOperation(CdmBase objectAffectedByOperation) {

		editor.getConversationHolder().bind();

		editor.getConversationHolder().commit(true);

		Display.getDefault().asyncExec(new Runnable(){

            @Override

            public void run() {

				//AbstractUtility.close(editor.getMultiPageTaxonEditor());

				try {

					MultiPageTaxonEditor possibleOpenEditor = (MultiPageTaxonEditor) EditorUtil.findEditorByTaxonNodeUuid(newAcceptedTaxonNodeUuid);

					if(possibleOpenEditor != null){

						AbstractUtility.close(possibleOpenEditor);

					}

					EditorUtil.openTaxonNode(newAcceptedTaxonNodeUuid);

				} catch (PartInitException e) {

					MessagingUtils.error(this.getClass(), e);

					throw new RuntimeException(e);

				} catch (Exception e) {

					MessagingUtils.warningDialog("Could not create Taxon", this, e.getMessage());

				}

			}

		});

		return true;

	}

	@Override

	public boolean onComplete() {

		return false;

	}

}