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.editor.key.polytomous.e4;

import java.util.List;

import javax.annotation.PostConstruct;

import javax.inject.Inject;

import org.eclipse.core.runtime.IProgressMonitor;

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.model.application.ui.basic.MPart;

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

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

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.jface.viewers.TableViewerColumn;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.MouseAdapter;

import org.eclipse.swt.events.MouseEvent;

import org.eclipse.swt.graphics.Point;

import org.eclipse.swt.graphics.Rectangle;

import org.eclipse.swt.layout.FillLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableItem;

import org.eclipse.ui.PartInitException;

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

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

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

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

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

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

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

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

import eu.etaxonomy.taxeditor.editor.EditorUtil;

import eu.etaxonomy.taxeditor.editor.key.e4.KeyEditorDataChangeBehaviourE4;

import eu.etaxonomy.taxeditor.editor.key.polytomous.IPolytomousKeyEditorPage;

import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyEditorInput;

import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyListContentProvider;

import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyListLabelProvider;

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

import eu.etaxonomy.taxeditor.model.DataChangeBridge;

import eu.etaxonomy.taxeditor.model.IDirtyMarkable;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

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

/**

 *

 * @author pplitzner

 * @since Sep 28, 2017

 *

 */

public class PolytomousKeyListEditorE4 implements

		IConversationEnabled, IDirtyMarkable, IPartContentHasDetails,

		IPolytomousKeyEditorPage, IE4SavablePart{

	private class LinkListener extends MouseAdapter {

		@Override

		public void mouseUp(MouseEvent event) {

	    		if(event.button == 1 && event.count == 2) {

		        Table table = (Table) event.widget;

		        // Determine where the mouse was clicked

		        Point point = new Point(event.x, event.y);

		        int selectedColumn = getSelectedColumn(table, point);

		        if (table == null || point == null ){

		            return;

		        }

		       TableItem item = getTableItem(

                        table, point);

		       PolytomousKeyNode node ;

		       if (item != null){

		         node =(PolytomousKeyNode) item.getData();

		       } else{

		           return;

		       }

		        if (selectedColumn == 4) {

		            PolytomousKeyNode linkData = getItemLinkData(node);

		            if (linkData != null) {

		                viewer.setSelection(new StructuredSelection(linkData), true);

		            }

		        }

		        if (selectedColumn == 5) {

		            Taxon taxon = getItemTaxon(node);

		            if (taxon != null) {

		                try {

		                    EditorUtil.openTaxonBaseE4((taxon).getUuid());

		                } catch (PartInitException e) {

		                    MessagingUtils.error(getClass(), e);

		                }

		            }

		        }

		    }

		}

		private int getSelectedColumn(Table table, Point point) {

			TableItem item = getTableItem(table, point);

			if (item != null) {

				for (int i = 0, n = table.getColumnCount(); i < n; i++) {

					Rectangle rect = item.getBounds(i);

					if (rect.contains(point)) {

						// This is the selected column

						return i;

					}

				}

			}

			return -1;

		}

		private TableItem getTableItem(Table table, Point point) {

			return table.getItem(point);

		}

		private PolytomousKeyNode getItemLinkData(PolytomousKeyNode node) {

			return node.getChildren().isEmpty() ? null : node

					.getChildAt(0);

		}

        private Taxon getItemTaxon(PolytomousKeyNode node) {

            return node.getTaxon();

        }

	}

	public static final String ID = "eu.etaxonomy.taxeditor.editor.key.polytomous.list"; //$NON-NLS-1$

	private TableViewer viewer;

    private KeyEditorDataChangeBehaviourE4 dataChangeBehavior;

    private PolytomousKeyEditorInput input;

    @Inject

    private ESelectionService selService;

    @Inject

    private MDirtyable dirty;

    private ISelectionChangedListener selectionChangedListener;

    @Inject

    private MPart thisPart;

    @Inject

	public PolytomousKeyListEditorE4() {

	}

	@Override

	public void update(CdmDataChangeMap map) {

	    if(dataChangeBehavior == null){

            dataChangeBehavior = new KeyEditorDataChangeBehaviourE4(this);

        }

        DataChangeBridge.handleDataChange(map, dataChangeBehavior);

	}

	@Override

	public ConversationHolder getConversationHolder() {

		return input.getConversationHolder();

	}

	@Override

    @Persist

	public void save(IProgressMonitor monitor) {

        try {

            monitor.beginTask(Messages.KeyEditor_SAVING, 1);

            getConversationHolder().bind();

            getConversationHolder().commit(true);

            input.merge();

            dirty.setDirty(false);

            monitor.worked(1);

        } finally {

            monitor.done();

        }

    }

	public void init(PolytomousKeyEditorInput input) {

		this.input = input;

        PolytomousKey key = input.getKey();

        key = HibernateProxyHelper.deproxy(key, PolytomousKey.class);

        key.setRoot(HibernateProxyHelper.deproxy(key.getRoot(), PolytomousKeyNode.class));

        thisPart.setLabel(key.getTitleCache());

        viewer.setInput(input);

	}

    public PolytomousKeyEditorInput getEditorInput() {

        return input;

    }

	public boolean isDirty() {

		return dirty.isDirty();

	}

	@PostConstruct

	public void createPartControl(Composite parent, EMenuService menuService) {

		FillLayout fillLayout = new FillLayout();

		fillLayout.marginWidth = 0;

		fillLayout.marginHeight = 0;

		fillLayout.type = SWT.VERTICAL;

		parent.setLayout(fillLayout);

		viewer = new TableViewer(parent, SWT.MULTI | SWT.H_SCROLL

				| SWT.V_SCROLL | SWT.FULL_SELECTION);

		createColumns(viewer);

		viewer.getControl().addMouseListener(new LinkListener());

		viewer.setContentProvider(new PolytomousKeyListContentProvider());

		viewer.setLabelProvider(new PolytomousKeyListLabelProvider());

		//propagate selection

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

        viewer.addSelectionChangedListener(selectionChangedListener);

        //create context menu

        menuService.registerContextMenu(viewer.getControl(), "eu.etaxonomy.taxeditor.editor.popupmenu.polytomouskeylisteditor");

	}

	public int getTableItemCount() {

	    if (viewer != null && viewer.getTable() != null) {

	        return viewer.getTable().getItemCount();

	    }

	    return 0;

	}

	public PolytomousKey getViewerInputKey() {

	    return ((PolytomousKeyEditorInput) viewer.getInput()).getKey();

	}

	// This will create the columns for the table

	private void createColumns(TableViewer viewer) {

		Table table = viewer.getTable();

		String[] titles = { Messages.PolytomousKeyListEditor_NODE, Messages.PolytomousKeyListEditor_QUESTION, Messages.PolytomousKeyListEditor_EDGE,  Messages.PolytomousKeyListEditor_STATEMENT, Messages.PolytomousKeyListEditor_LINK, Messages.PolytomousKeyListEditor_TAXON };

		int[] bounds = { 50, 200, 50, 200, 100, 200 };

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

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

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

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

			column.getColumn().setResizable(true);

			column.getColumn().setMoveable(true);

		}

		table.setHeaderVisible(true);

		table.setLinesVisible(false);

	}

	@Focus

	public void setFocus() {

	    if(viewer!=null && viewer.getControl()!=null){

	        viewer.getControl().setFocus();

	    }

	    if(input!=null){

	        input.bind();

	    }

	}

	@Override

	public void changed(Object element) {

        if(element != null) {

            viewer.update(element, null);

        }

        if (element instanceof PolytomousKeyNode) {

            List<PolytomousKeyNode> children = ((PolytomousKeyNode) element)

                    .getParent().getChildren();

            for (PolytomousKeyNode child : children) {

                viewer.update(child, null);

            }

        }

        dirty.setDirty(true);

        viewer.refresh();

	}

    @Override

    public void forceDirty() {

        changed(null);

    }

	@Override

	public boolean postOperation(CdmBase objectAffectedByOperation) {

		viewer.refresh();

//		getConversationHolder().bind();

//		getConversationHolder().commit(true);

		changed(objectAffectedByOperation);

		if (objectAffectedByOperation != null) {

			viewer.setSelection(new StructuredSelection(

					objectAffectedByOperation), true);

		}

		return true;

	}

	@Override

	public boolean onComplete() {

		return true;

	}

    public void setPartName() {

        PolytomousKey key = input.getKey();

        thisPart.setLabel(key.getTitleCache());

    }

}