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.util.EventObject;

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.NullProgressMonitor;

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

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.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.CellEditor;

import org.eclipse.jface.viewers.ColumnViewerEditor;

import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;

import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;

import org.eclipse.jface.viewers.ICellModifier;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.ITableLabelProvider;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.jface.viewers.TableViewerColumn;

import org.eclipse.jface.viewers.TableViewerEditor;

import org.eclipse.jface.viewers.TableViewerFocusCellManager;

import org.eclipse.jface.viewers.TextCellEditor;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.MouseEvent;

import org.eclipse.swt.layout.FillLayout;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Table;

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

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

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

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

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditorQuery;

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

import eu.etaxonomy.taxeditor.l10n.Messages;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

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.store.CdmStore;

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 {

	@Inject

	private MDirtyable dirty;

    private AbstractBulkEditorInput<?> input;

    private Composite topComposite;

    private TableViewer viewer;

    private ConversationHolder conversation;

    @Inject

    private ESelectionService selService;

    private ISelectionChangedListener selectionChangedListener;

    @Inject

    private MPart thisPart;

    private BulkEditorQuery lastQuery = null;

    @Inject

    public BulkEditorE4() {

	}

	public void init(AbstractBulkEditorInput<?> input){

	    this.input = input;

	    this.conversation = input.getConversation();

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

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

	    topComposite.getParent().layout();

	    thisPart.setLabel(input.getName());

	    //create columns

	    Table table = viewer.getTable();

	    String[] titles = {input.getName(), "Type"};

	    int[] bounds = {500, 100};

	    ColumnViewerEditorActivationStrategy activationSupport = new ColumnViewerEditorActivationStrategy(viewer) {

            @Override

            protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) {

                // Enable editor only with mouse double click

                if (event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION) {

                    EventObject source = event.sourceEvent;

                    if (source instanceof MouseEvent && ((MouseEvent)source).button == 3) {

                        return false;

                    }

                    return true;

                }

                return false;

            }

        };

        TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(viewer, new BulkEditorFocusCellOwnerDrawHighLighter(viewer));

        TableViewerEditor.create(viewer, focusCellManager, activationSupport, ColumnViewerEditor.TABBING_HORIZONTAL |

                ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR |

                ColumnViewerEditor.TABBING_VERTICAL |

                ColumnViewerEditor.KEYBOARD_ACTIVATION );

	    CellEditor[] editors = new CellEditor[titles.length];

	    for (int i = 0; i < titles.length; i++) {

	        TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);

	        editors[i] = new TextCellEditor(table);

	        column.getColumn().setText(titles[i]);

	        column.getColumn().setWidth(bounds[i]);

	        column.getColumn().setResizable(true);

	        column.getColumn().setMoveable(true);

	    }

	    table.setHeaderVisible(true);

	    table.setLinesVisible(true);

	    viewer.setCellEditors(editors);

	    viewer.setColumnProperties(titles);

	    //content and label provider (NOTE: has to be set AFTER creating cell editors

	    viewer.setContentProvider(new ArrayContentProvider());

        BulkEditorLabelProvider labelProvider = new BulkEditorLabelProvider(this);

        viewer.setLabelProvider(labelProvider);

        //allow text selection

        viewer.setCellModifier(new ICellModifier() {

            @Override

            public void modify(Object element, String property, Object value) {

            }

            @Override

            public Object getValue(Object element, String property) {

                ITableLabelProvider tableLabelProvider = null;

                if(viewer.getLabelProvider() instanceof ITableLabelProvider){

                    tableLabelProvider = (ITableLabelProvider) viewer.getLabelProvider();

                }

                Object[] columnProperties = viewer.getColumnProperties();

                for (int i=0;i<columnProperties.length;i++) {

                    if(columnProperties[i].equals(property) && tableLabelProvider!=null){

                        return tableLabelProvider.getColumnText(element, i);

                    }

                }

                return "";

            }

            @Override

            public boolean canModify(Object element, String property) {

                return true;

            }

        });

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

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

        }

	}

	/** {@inheritDoc} */

	@PostConstruct

	public void createPartControl(Composite parent, EMenuService menuService) {

		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);

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

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

		bottomComposite.setLayout(new FillLayout());

		viewer = new TableViewer(bottomComposite, SWT.MULTI | SWT.FULL_SELECTION);

//		createColumns(viewer);

        //propagate selection

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

        viewer.addSelectionChangedListener(selectionChangedListener);

        //create context menu

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

	}

	@Override

	@Persist

	public void save(IProgressMonitor monitor) {

	    save(monitor, true);

	}

	@PreDestroy

	public void dispose() {

	    if(conversation!=null){

	        conversation.unregisterForDataStoreChanges(this);

	        conversation.close();

	    }

	    if(input!=null){

	        input.dispose();

	    }

	}

	public void save(IProgressMonitor monitor, boolean resetMerge) {

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

            input.getCdmEntitySession().bind();

        }

	    input.saveModel(resetMerge);

	    List<CdmBase> saveCandidates = getEditorInput().getSaveCandidates();

	    if (!saveCandidates.isEmpty()){

	        CdmStore.getService(saveCandidates.get(0)).merge(saveCandidates, true);

	    }

        dirty.setDirty(false);

        getEditorInput().resetSaveCandidates();

        getEditorInput().dispose();

        getEditorInput().bind();

        conversation.commit(true);

        if (lastQuery != null){

            performSearch(lastQuery);

        }

        viewer.refresh();

	}

	/** {@inheritDoc} */

    public void performSearch(BulkEditorQuery query) {

        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);

//            getEditorInput().dispose();

//            getEditorInput().bind();

            getEditorInput().performSearch(query);

            lastQuery = query;

            viewer.setInput(getEditorInput().getModel());

            refresh();

        }

    }

    public void refresh() {

        refresh(true);

    }

    public void refresh(boolean resetInput) {

        if(resetInput){

            viewer.setInput(getEditorInput().getModel());

        }

        viewer.refresh();

    }

    public TableViewer getViewer() {

        return viewer;

    }

    public void setDirty(){

        dirty.setDirty(true);

    }

    public boolean isDirty() {

        return dirty.isDirty();

    }

    public AbstractBulkEditorInput getEditorInput() {

        return input;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void update(CdmDataChangeMap arg0) {

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public boolean canAttachMedia() {

        return true;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void changed(Object element) {

        if (element instanceof CdmBase) {

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

        }

        dirty.setDirty(true);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void forceDirty() {

        dirty.setDirty(true);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public boolean postOperation(CdmBase objectAffectedByOperation) {

        return false;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public boolean onComplete() {

        return false;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public ConversationHolder getConversationHolder() {

        return conversation;

    }

    /**

     * @return

     */

    public BulkEditorQuery getLastQuery() {

       return lastQuery;

    }

    /**

     * @param object

     */

    public void setLastQuery(BulkEditorQuery lastQuery) {

       this.lastQuery = lastQuery;

    }

}