EDIT

/**

* 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.navigation.search.e4;

import java.util.ArrayList;

import java.util.List;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import javax.inject.Inject;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.core.runtime.jobs.Job;

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

import org.eclipse.e4.ui.model.application.ui.basic.MPart;

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

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

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

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.DoubleClickEvent;

import org.eclipse.jface.viewers.IDoubleClickListener;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.IMemento;

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

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

import eu.etaxonomy.cdm.api.service.config.IFindTaxaAndNamesConfigurator;

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

import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;

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

import eu.etaxonomy.cdm.persistence.query.MatchMode;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.ContextListenerAdapter;

import eu.etaxonomy.taxeditor.model.IContextListener;

import eu.etaxonomy.taxeditor.navigation.NavigationUtil;

import eu.etaxonomy.taxeditor.navigation.l10n.Messages;

import eu.etaxonomy.taxeditor.navigation.search.SearchOption;

import eu.etaxonomy.taxeditor.navigation.search.SearchResultLabelProvider;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 *

 * @author pplitzner

 * @since Sep 27, 2017

 *

 */

public class SearchResultViewE4 implements IConversationEnabled{

	private static Object[] EMPTY = new Object[0];

	@Inject

	private MPart thisPart;

	private class ContextListener extends ContextListenerAdapter{

		@Override

		public void contextStop(IMemento memento, IProgressMonitor monitor) {

	        //close view when workbench closes

	        try{

	            thisPart.getContext().get(EPartService.class).hidePart(thisPart);

	        }

	        catch(Exception e){

	            //nothing

	        }

		}

	}

	/** Constant <code>ID="eu.etaxonomy.taxeditor.navigation.searc"{trunked}</code> */

	public static final String ID =

			"eu.etaxonomy.taxeditor.navigation.search.searchResultView"; //$NON-NLS-1$

	private TableViewer resultViewer;

	private ConversationHolder conversation;

	private Text searchString;

	private Text configurationLabel;

	private Text status;

	private SearchJob searchJob;

	private IContextListener contextListener;

    @Inject

    private ESelectionService selService;

    private ISelectionChangedListener selectionChangedListener;

	/** {@inheritDoc} */

	@PostConstruct

	public void createPartControl(Composite parent, EMenuService menuService) {

        if (CdmStore.isActive()){

            if(conversation == null){

                conversation = getConversation_internal();

            }

        }

        else{

            return;

        }

		contextListener = new ContextListener();

		CdmStore.getContextManager().addContextListener(contextListener);

		GridLayout layout = new GridLayout();

		layout.marginWidth = 0;

		layout.marginHeight = 0;

		parent.setLayout(layout);

		Composite infoComposite = createInfoComposite(parent);

		infoComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));

		resultViewer = new TableViewer(parent, SWT.NONE);

		resultViewer.setContentProvider(new ArrayContentProvider());

		resultViewer.setLabelProvider(new SearchResultLabelProvider());

		resultViewer.addDoubleClickListener(new IDoubleClickListener() {

			@Override

            public void doubleClick(DoubleClickEvent event) {

			    ISelection selection = event.getSelection();

			    if(selection instanceof IStructuredSelection){

			        Object firstElement = ((IStructuredSelection) selection).getFirstElement();

			        if(firstElement instanceof UuidAndTitleCache){

			            NavigationUtil.openEditor((UuidAndTitleCache) firstElement);

			        }

			    }

			}

		});

		resultViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		 //propagate selection

        selectionChangedListener = (event -> selService.setSelection(AbstractUtility.getElementsFromSelectionChangedEvent(event)));

        resultViewer.addSelectionChangedListener(selectionChangedListener);

        //create context menu

        menuService.registerContextMenu(resultViewer.getControl(), "eu.etaxonomy.taxeditor.navigation.popupmenu.searchresults");

	}

	private Composite createInfoComposite(Composite parent){

		Composite composite = new Composite(parent, SWT.NULL);

		composite.setLayout(new GridLayout(2, false));

		Label searchStringLabel = new Label(composite, SWT.NULL);

		searchStringLabel.setText(Messages.SearchResultView_SEARCH_STRING);

		searchString = new Text(composite, SWT.NULL);

		searchString.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		searchString.setEditable(false);

//		searchString.setText("                                               ");

		Label configurationDescriptionLabel = new Label(composite, SWT.NULL);

		configurationDescriptionLabel.setText(Messages.SearchResultView_SEARCH_FOR);

		configurationLabel = new Text(composite, SWT.WRAP);

		configurationLabel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		configurationLabel.setEditable(false);

		Label statusLabel = new Label(composite, SWT.NULL);

		statusLabel.setText(Messages.SearchResultView_STATUS);

		status = new Text(composite, SWT.NULL);

		status.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		status.setEditable(false);

		return composite;

	}

	/**

	 * <p>performSearch</p>

	 *

	 * @param configurator a {@link eu.etaxonomy.cdm.api.service.config.ITaxonServiceConfigurator} object.

	 */

	public void performSearch(IFindTaxaAndNamesConfigurator configurator){

		thisPart.setLabel(String.format(Messages.SearchResultView_SEARCH, configurator.getTitleSearchString()));

		searchString.setText(configurator.getTitleSearchString());

		List<String> includedEntities = new ArrayList<String>();

		if(configurator.isDoTaxa()) {

            includedEntities.add(SearchOption.TAXON.getLabel());

        }

		if(configurator.isDoSynonyms()) {

            includedEntities.add(SearchOption.SYNONYM.getLabel());

        }

		if(configurator.isDoNamesWithoutTaxa()) {

            includedEntities.add(SearchOption.NAME.getLabel());

        }

		if(configurator.isDoTaxaByCommonNames()){

			includedEntities.add(SearchOption.COMMON_NAME.getLabel());

		}

		configurator.setMatchMode(MatchMode.LIKE);

		String includedEntitiesString = ""; //$NON-NLS-1$

		for (int i = 0; i < includedEntities.size(); i++){

			includedEntitiesString += includedEntities.get(i);

			if(i < includedEntities.size() -1){

				includedEntitiesString += ", "; //$NON-NLS-1$

			}

		}

		configurationLabel.setText(includedEntitiesString);

		status.setText(Messages.SearchResultView_SEARCHING);

		searchJob = new SearchJob(Display.getCurrent(), configurator);

		searchJob.schedule();

	}

	/**

	 * <p>displaySearchResult</p>

	 *

	 * @param result a {@link java.util.List} object.

	 */

	protected void displaySearchResult(List<UuidAndTitleCache<IdentifiableEntity>> result) {

		if(result.size() > 0){

			resultViewer.setInput(result);

			status.setText(String.format(Messages.SearchResultView_CNT_ENTITIES_FOUND, result.size()));

		}else{

			resultViewer.setInput(EMPTY);

			status.setText(Messages.SearchResultView_NO_RESULTS);

		}

	}

	/** {@inheritDoc} */

	@Focus

	public void setFocus() {

		//logger.warn("Setting focus to search result viewer");

		ConversationHolder conversation_internal = getConversation_internal();

		if(conversation_internal!=null){

		    conversation_internal.bind();

		}

		// pass focus to resultViewer

		resultViewer.getControl().setFocus();

	}

	/**

	 * <p>getConversationHolder</p>

	 *

	 * @return a {@link eu.etaxonomy.cdm.api.conversation.ConversationHolder} object.

	 */

	@Override

    public ConversationHolder getConversationHolder() {

		return this.conversation;

	}

	/** {@inheritDoc} */

	@Override

    public void update(CdmDataChangeMap changeEvents) {

		// TODO Auto-generated method stub

	}

	/** {@inheritDoc} */

	@PreDestroy

	public void dispose() {

		if(conversation!=null){

		    conversation.close();

		}

		if(searchJob != null) {

            searchJob.cancel();

        }

	}

	private ConversationHolder getConversation_internal(){

	    if(conversation==null && CdmStore.isActive()){

	        try {

	            conversation = CdmStore.createConversation();

            } catch (Exception e) {

                //nothing

            }

	    }

	    return conversation;

	}

	/**

	 *

	 * @author n.hoffmann

	 * @created Feb 2, 2010

	 * @version 1.0

	 */

	class SearchJob extends Job{

		private final IFindTaxaAndNamesConfigurator configurator;

		private final Display display;

		/**

		 * @param name

		 */

		public SearchJob(Display display, IFindTaxaAndNamesConfigurator configurator) {

			super(Messages.SearchResultView_PERFORMING_SEARCH);

			this.display = display;

			this.configurator = configurator;

		}

		@Override

		protected IStatus run(IProgressMonitor monitor) {

			monitor.beginTask("", 100); //$NON-NLS-1$

			monitor.worked(20);

			final List<UuidAndTitleCache<IdentifiableEntity>> searchResult = CdmStore.getSearchManager().findTaxaAndNames(configurator);

			monitor.worked(40);

			if(! monitor.isCanceled()){

				display.asyncExec(new Runnable() {

					@Override

                    public void run() {

						displaySearchResult(searchResult);

					}

				});

			}else{

				display.asyncExec(new Runnable() {

					@Override

                    public void run() {

						status.setText(Messages.SearchResultView_CANCELLED);

					}

				});

			}

			monitor.done();

			return Status.OK_STATUS;

		}

	}

}