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.bulkeditor.e4;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.annotation.PostConstruct;

import javax.annotation.PreDestroy;

import javax.inject.Inject;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.NullProgressMonitor;

import org.eclipse.e4.core.di.annotations.Optional;

import org.eclipse.e4.core.services.events.IEventBroker;

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

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

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

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

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

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

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

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.nebula.widgets.nattable.NatTable;

import org.eclipse.nebula.widgets.nattable.command.VisualRefreshCommand;

import org.eclipse.nebula.widgets.nattable.command.VisualRefreshCommandHandler;

import org.eclipse.nebula.widgets.nattable.config.AbstractRegistryConfiguration;

import org.eclipse.nebula.widgets.nattable.config.AbstractUiBindingConfiguration;

import org.eclipse.nebula.widgets.nattable.config.ConfigRegistry;

import org.eclipse.nebula.widgets.nattable.config.DefaultNatTableStyleConfiguration;

import org.eclipse.nebula.widgets.nattable.config.IConfigRegistry;

import org.eclipse.nebula.widgets.nattable.config.IEditableRule;

import org.eclipse.nebula.widgets.nattable.data.IRowIdAccessor;

import org.eclipse.nebula.widgets.nattable.data.ListDataProvider;

import org.eclipse.nebula.widgets.nattable.edit.EditConfigAttributes;

import org.eclipse.nebula.widgets.nattable.extension.glazedlists.GlazedListsEventLayer;

import org.eclipse.nebula.widgets.nattable.extension.glazedlists.GlazedListsSortModel;

import org.eclipse.nebula.widgets.nattable.grid.GridRegion;

import org.eclipse.nebula.widgets.nattable.grid.data.DefaultColumnHeaderDataProvider;

import org.eclipse.nebula.widgets.nattable.grid.data.DefaultCornerDataProvider;

import org.eclipse.nebula.widgets.nattable.grid.data.DefaultRowHeaderDataProvider;

import org.eclipse.nebula.widgets.nattable.grid.layer.ColumnHeaderLayer;

import org.eclipse.nebula.widgets.nattable.grid.layer.CornerLayer;

import org.eclipse.nebula.widgets.nattable.grid.layer.GridLayer;

import org.eclipse.nebula.widgets.nattable.grid.layer.RowHeaderLayer;

import org.eclipse.nebula.widgets.nattable.layer.DataLayer;

import org.eclipse.nebula.widgets.nattable.layer.stack.DefaultBodyLayerStack;

import org.eclipse.nebula.widgets.nattable.selection.RowSelectionModel;

import org.eclipse.nebula.widgets.nattable.selection.RowSelectionProvider;

import org.eclipse.nebula.widgets.nattable.sort.SortHeaderLayer;

import org.eclipse.nebula.widgets.nattable.sort.config.SingleClickSortConfiguration;

import org.eclipse.nebula.widgets.nattable.style.DisplayMode;

import org.eclipse.nebula.widgets.nattable.style.theme.ModernNatTableThemeConfiguration;

import org.eclipse.nebula.widgets.nattable.ui.binding.UiBindingRegistry;

import org.eclipse.nebula.widgets.nattable.ui.matcher.MouseEventMatcher;

import org.eclipse.nebula.widgets.nattable.ui.menu.PopupMenuAction;

import org.eclipse.nebula.widgets.nattable.ui.menu.PopupMenuBuilder;

import org.eclipse.swt.SWT;

import org.eclipse.swt.dnd.Clipboard;

import org.eclipse.swt.dnd.TextTransfer;

import org.eclipse.swt.dnd.Transfer;

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.Menu;

import ca.odell.glazedlists.SortedList;

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

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

import eu.etaxonomy.cdm.api.facade.DerivedUnitFacade;

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

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

import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;

import eu.etaxonomy.cdm.model.occurrence.FieldUnit;

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

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

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditorQuery;

import eu.etaxonomy.taxeditor.bulkeditor.input.AbstractBulkEditorInput;

import eu.etaxonomy.taxeditor.bulkeditor.input.sortprovider.TitleCacheComparator;

import eu.etaxonomy.taxeditor.editor.ITaxonEditor;

import eu.etaxonomy.taxeditor.event.WorkbenchEventConstants;

import eu.etaxonomy.taxeditor.l10n.Messages;

import eu.etaxonomy.taxeditor.model.IDerivedUnitFacadePart;

import eu.etaxonomy.taxeditor.model.IDirtyMarkable;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasFactualData;

import eu.etaxonomy.taxeditor.model.IPartContentHasMedia;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;

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

/**

 *

 * @author pplitzner

 * @since Sep 8, 2017

 *

 */

public class BulkEditorE4 implements IPartContentHasDetails, IConversationEnabled, IPostOperationEnabled,

        IDirtyMarkable, IDerivedUnitFacadePart, IPartContentHasFactualData,

        IPartContentHasSupplementalData, IPartContentHasMedia, IE4SavablePart, ITaxonEditor {

    public static final String TYPE_PROPERTY = "Type";

    @Inject

	private MDirtyable dirty;

    private AbstractBulkEditorInput input;

    private Composite topComposite;

    private ConversationHolder conversation;

    @Inject

    private ESelectionService selService;

    @Inject

    private IEventBroker eventBroker;

    private ISelectionChangedListener selectionChangedListener;

    @Inject

    private MPart thisPart;

    private BulkEditorQuery lastQuery = null;

    private Composite bottomComposite;

    @Inject

    private EMenuService menuService;

    private NatTable natTable;

    private DefaultBodyLayerStack bodyLayer;

    private ListDataProvider<CdmBase> bodyDataProvider;

    @Inject

    public BulkEditorE4() {

	}

	@SuppressWarnings("unused")

    public void init(AbstractBulkEditorInput<?> input){

	    this.input = input;

	    this.conversation = input.getConversation();

	    new BulkEditorSearchE4(this, topComposite, SWT.NONE);

	    //layout needed because the search bar is added after @PostConstuct method

	    topComposite.getParent().layout();

	    thisPart.setLabel(input.getEditorName());

        if(input.getEntityUuid()!=null){

            performSearch(new BulkEditorQuery(input.getEntityUuid().toString()));

        }

        createTable();

        configureTable();

        styleTable();

        GridDataFactory.fillDefaults().grab(true, true).applyTo(natTable);

        //propagate selection

        selectionChangedListener = (event -> selService.setSelection(getSelection()));

        RowSelectionProvider<CdmBase> selectionProvider = new RowSelectionProvider<CdmBase>(bodyLayer.getSelectionLayer(), bodyDataProvider, true);

        selectionProvider.addSelectionChangedListener(selectionChangedListener);

        bottomComposite.layout();

	}

	private void createTable(){

	    ConfigRegistry configRegistry = new ConfigRegistry();

	    //property map

        Map<String, String> propertyToLabels = new HashMap<>();

        propertyToLabels.put(getEditorInput().getName(), getEditorInput().getName());

        propertyToLabels.put(TYPE_PROPERTY, TYPE_PROPERTY);

        String[] propertyNames = new String[] { input.getName(), TYPE_PROPERTY };

        //sorted list

        SortedList<CdmBase> sortedList = new SortedList<>(input.getModel(), new TitleCacheComparator());

        //data provider

        BulkEditorPropertyAccessor columnPropertyAccessor = new BulkEditorPropertyAccessor(input);

        bodyDataProvider = new ListDataProvider<CdmBase>(sortedList,

                columnPropertyAccessor);

        DefaultColumnHeaderDataProvider colHeaderDataProvider = new DefaultColumnHeaderDataProvider(

                propertyNames, propertyToLabels);

        DefaultRowHeaderDataProvider rowHeaderDataProvider = new DefaultRowHeaderDataProvider(

                bodyDataProvider);

        //body

        DataLayer dataLayer = new DataLayer(bodyDataProvider);

        dataLayer.registerCommandHandler(new VisualRefreshCommandHandler());

        GlazedListsEventLayer<CdmBase> eventLayer = new GlazedListsEventLayer<>(dataLayer, input.getModel());

        bodyLayer = new DefaultBodyLayerStack(eventLayer);

        //column

        DataLayer columnHeaderDataLayer = new DataLayer(colHeaderDataProvider);

        ColumnHeaderLayer columnHeaderLayer = new ColumnHeaderLayer(

                columnHeaderDataLayer,

                bodyLayer, bodyLayer.getSelectionLayer());

        // add the SortHeaderLayer to the column header layer stack

        // as we use GlazedLists, we use the GlazedListsSortModel which

        // delegates the sorting to the SortedList

        final SortHeaderLayer<SpecimenDescription> sortHeaderLayer = new SortHeaderLayer<>(

                columnHeaderLayer,

                new GlazedListsSortModel<>(

                        sortedList,

                        columnPropertyAccessor,

                        configRegistry,

                        columnHeaderDataLayer));

        //row

        RowHeaderLayer rowHeaderLayer = new RowHeaderLayer(new DataLayer(rowHeaderDataProvider, 50, 20),

                bodyLayer, bodyLayer.getSelectionLayer());

        //corner

        DefaultCornerDataProvider cornerDataProvider = new DefaultCornerDataProvider(

                colHeaderDataProvider, rowHeaderDataProvider);

        CornerLayer cornerLayer = new CornerLayer(new DataLayer(

                cornerDataProvider), rowHeaderLayer, sortHeaderLayer);

        //grid

        GridLayer gridLayer = new GridLayer(bodyLayer, sortHeaderLayer,

                rowHeaderLayer, cornerLayer);

        dataLayer.setColumnPercentageSizing(true);

        natTable = new NatTable(bottomComposite, gridLayer, false);

        natTable.setConfigRegistry(configRegistry);

        //full row selection

        bodyLayer.getSelectionLayer().setSelectionModel(new RowSelectionModel<CdmBase>(bodyLayer.getSelectionLayer(), bodyDataProvider, new IRowIdAccessor<CdmBase>() {

            @Override

            public Serializable getRowId(CdmBase rowObject) {

                return input.getModel().indexOf(rowObject);

            }

        }));

	}

	private void configureTable(){

        //+++CONTEXT MENU+++

        menuService.registerContextMenu(natTable, "eu.etaxonomy.taxeditor.bulkeditor.popupmenu.bulkeditor"); //$NON-NLS-1$

        // get the menu registered by EMenuService

        final Menu e4Menu = natTable.getMenu();

        // remove the menu reference from NatTable instance

        natTable.setMenu(null);

        natTable.addConfiguration(

                new AbstractUiBindingConfiguration() {

            @Override

            public void configureUiBindings(

                    UiBindingRegistry uiBindingRegistry) {

                // add e4 menu to NatTable

                new PopupMenuBuilder(natTable, e4Menu)

                    .build();

                // register the UI binding for header, corner and body region

                uiBindingRegistry.registerMouseDownBinding(

                        new MouseEventMatcher(

                                SWT.NONE,

                                GridRegion.BODY,

                                MouseEventMatcher.RIGHT_BUTTON),

                        new PopupMenuAction(e4Menu));

                uiBindingRegistry.registerMouseDownBinding(

                        new MouseEventMatcher(

                                SWT.NONE,

                                GridRegion.COLUMN_HEADER,

                                MouseEventMatcher.RIGHT_BUTTON),

                        new PopupMenuAction(e4Menu));

                uiBindingRegistry.registerMouseDownBinding(

                        new MouseEventMatcher(

                                SWT.NONE,

                                GridRegion.CORNER,

                                MouseEventMatcher.RIGHT_BUTTON),

                        new PopupMenuAction(e4Menu));

            }

        });

        //make cells editable to allow selecting the text

        natTable.addConfiguration(new AbstractRegistryConfiguration() {

            @Override

            public void configureRegistry(IConfigRegistry configRegistry) {

              //make cell editable

                configRegistry.registerConfigAttribute(

                        EditConfigAttributes.CELL_EDITABLE_RULE,

                        IEditableRule.ALWAYS_EDITABLE,

                        DisplayMode.EDIT);

            }

        });

        //enable sorting

        natTable.addConfiguration(new SingleClickSortConfiguration());

        //add default configuration because autoconfigure is set to false in constructor

        natTable.addConfiguration(new DefaultNatTableStyleConfiguration());

        natTable.configure();

	}

	private void styleTable(){

	    natTable.setTheme(new ModernNatTableThemeConfiguration());

	}

	/** {@inheritDoc} */

	@PostConstruct

	public void createPartControl(Composite parent) {

		parent.setLayout(new GridLayout());

		topComposite = new Composite(parent, SWT.NONE);

		topComposite.setLayout(new GridLayout());

		GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false);

		topComposite.setLayoutData(gridData);

		bottomComposite = new Composite(parent, SWT.NONE);

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

		bottomComposite.setLayout(new GridLayout());

	}

	@Override

	@Persist

	public void save(IProgressMonitor monitor) {

	    save(monitor, true);

	}

	@Focus

	public void setFocus() {

        //make sure to bind again if maybe in another view the conversation was unbound

        if(conversation!=null && !conversation.isBound()){

            conversation.bind();

        }

        if(input!=null && input.getCdmEntitySession()!= null) {

            input.getCdmEntitySession().bind();

        }

	    //make sure to bind again if maybe in another view the conversation was unbound

	    eventBroker.post(WorkbenchEventConstants.CURRENT_ACTIVE_EDITOR, this);

	}

	@PreDestroy

	public void dispose() {

	    if(conversation!=null){

	        conversation.unregisterForDataStoreChanges(this);

	        conversation.close();

	    }

	    if(input!=null){

	        input.dispose();

	    }

	    dirty.setDirty(false);

	}

	public void save(IProgressMonitor monitor, boolean resetMerge) {

	    if (!input.getCdmEntitySession().isActive()){

            input.getCdmEntitySession().bind();

        }

	    input.saveModel(resetMerge);

	    IStructuredSelection selection = getSelection();

        dirty.setDirty(false);

        input.dispose();

        input.bind();

        conversation.commit(true);

        if (lastQuery != null){

            performSearch(lastQuery, selection);

        }

	}

	public void performSearch(BulkEditorQuery query) {

	    performSearch(query, null);

	}

	/** {@inheritDoc}

	 * @param selection */

    public void performSearch(BulkEditorQuery query, IStructuredSelection selection) {

        if (query != null) {

            // TODO check if dirty, prompt save

            if (isDirty()) {

                String[] labels = {Messages.BulkEditorE4_SAVE_AND_SEARCH, Messages.BulkEditorE4_DONT_SAVE,Messages.BulkEditorE4_CANCEL};

                MessageDialog dialog =new MessageDialog(topComposite.getShell(), Messages.BulkEditorE4_SAVE_CHANGES_TITLE, null, Messages.BulkEditorE4_SAVE_CHANGES_MESSAGE, MessageDialog.QUESTION,labels, 0);

                int result = dialog.open();

                if (result == 0) {

                    save(new NullProgressMonitor());

                } else if (result == 2){

                    return;

                }

            }

            dirty.setDirty(false);

            input.performSearch(query, selection);

            lastQuery = query;

        }

    }

    @Optional

    @Inject

    private void setSelectionAfterSearch(@UIEventTopic(WorkbenchEventConstants.BULK_EDITOR_SEARCH_FINISHED)IStructuredSelection selection){

        if(selection!=null){

            setSelection(selection);

        }

    }

    public void refresh(){

        natTable.doCommand(new VisualRefreshCommand());

    }

    public IStructuredSelection getSelection(){

        List<CdmBase> selection = new ArrayList<>();

        int[] fullySelectedRowPositions = bodyLayer.getSelectionLayer().getFullySelectedRowPositions();

        for (int i : fullySelectedRowPositions) {

            Object rowObject = bodyDataProvider.getRowObject(i);

            if(rowObject instanceof CdmBase){

                selection.add((CdmBase) rowObject);

            }

        }

        return new StructuredSelection(selection);

    }

    public void setSelection(IStructuredSelection selection){

        Object[] objects = selection.toArray();

        for (Object object : objects) {

            if(object instanceof CdmBase){

                bodyLayer.getSelectionLayer().selectRow(0, bodyDataProvider.indexOfRowObject((CdmBase) object), false, false);

            }

        }

    }

    public void setDirty(){

        dirty.setDirty(true);

    }

    public boolean isDirty() {

        return dirty.isDirty();

    }

    public AbstractBulkEditorInput getEditorInput() {

        return input;

    }

    public void copyDataToClipboard() {

        String textData = "";

        IStructuredSelection selection = getSelection();

        Object[] objects = selection.toArray();

        for (Object object : objects) {

            if(object instanceof CdmBase){

                textData += getEditorInput().getText((CdmBase)object);

            }

        }

        final TextTransfer textTransfer = TextTransfer.getInstance();

        final Clipboard clipboard = new Clipboard(Display.getDefault());

        try {

            clipboard.setContents(new Object[] { textData.toString() },

                    new Transfer[] { textTransfer });

        } finally {

            clipboard.dispose();

        }

    }

    @Override

    public void update(CdmDataChangeMap arg0) {

    }

    @Override

    public boolean canAttachMedia() {

        return true;

    }

    @Override

    public void changed(Object element) {

        if(element instanceof DerivedUnitFacade){

            DerivedUnit derivedUnit = ((DerivedUnitFacade) element).innerDerivedUnit();

            if(derivedUnit!=null){

                getEditorInput().addSaveCandidate(derivedUnit);

            }

            FieldUnit fieldUnit = ((DerivedUnitFacade) element).innerFieldUnit();

            if(fieldUnit!=null){

                getEditorInput().addSaveCandidate(fieldUnit);

            }

        }

        else if (element instanceof CdmBase) {

            getEditorInput().addSaveCandidate((CdmBase)element);

            input.replaceInModel((CdmBase) element);

        }

        dirty.setDirty(true);

        setSelection(new StructuredSelection(element));

    }

    @Override

    public void forceDirty() {

        dirty.setDirty(true);

    }

    @Override

    public boolean postOperation(CdmBase objectAffectedByOperation) {

        return false;

    }

    @Override

    public boolean onComplete() {

        return false;

    }

    @Override

    public ConversationHolder getConversationHolder() {

        return conversation;

    }

    public BulkEditorQuery getLastQuery() {

       return lastQuery;

    }

    public void setLastQuery(BulkEditorQuery lastQuery) {

       this.lastQuery = lastQuery;

    }

    @Override

    public Taxon getTaxon() {

        IStructuredSelection selection = getSelection();

        if(selection.size()==1) {

            Object object = selection.iterator().next();

            if(object instanceof Taxon){

                return (Taxon) object;

            }

        }

        return null;

    }

}