package org.simantics.district.region.ui;

import java.util.List;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Inject;

import org.eclipse.e4.ui.di.Focus;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.model.application.ui.menu.MHandledToolItem;
import org.eclipse.e4.ui.model.application.ui.menu.MMenuContribution;
import org.eclipse.e4.ui.model.application.ui.menu.MMenuFactory;
import org.eclipse.e4.ui.model.application.ui.menu.MPopupMenu;
import org.eclipse.e4.ui.model.application.ui.menu.MToolBar;
import org.eclipse.e4.ui.services.EMenuService;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import org.eclipse.swt.widgets.Composite;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Jani Simomaa
 */
public class DiagramRegionsTableView {

    private static final Logger LOGGER = LoggerFactory.getLogger(DiagramRegionsTableView.class);

    DiagramRegionsTableUI ui;

    /**
     * See
     * http://www.vogella.com/tutorials/EclipsePlugin/article.html#adding-eclipse-4-x-parts-to-eclipse-3-x-applications-via-the-code-org-eclipse-ui-views-code-extension-point
     * 
     * Cannot contribute toolbar items via fragment at this point
     */
    @Inject
    public void init(MPart part, MApplication app) {
        MHandledToolItem createHandledToolItem = MMenuFactory.INSTANCE.createHandledToolItem();
        // Command is contributed via fragment
        createHandledToolItem.setCommand(app.getCommand("org.simantics.district.region.ui.command.createRegionFromSelection"));
        createHandledToolItem.setLabel("Create Region From Selection");
        createHandledToolItem.setIconURI("platform:/plugin/com.famfamfam.silk/icons/table_add.png");
        MToolBar toolBar = MMenuFactory.INSTANCE.createToolBar();
        toolBar.setToBeRendered(true);
        toolBar.getChildren().add(createHandledToolItem);
        part.setToolbar(toolBar);
        
        
        MPopupMenu createPopupMenu = MMenuFactory.INSTANCE.createPopupMenu();
        createPopupMenu.setElementId(POPUP_ID);
        createHandledToolItem.setContributorURI("org.simantics.district.region.ui.contextMenu");
        
        List<MMenuContribution> menuContributions = app.getMenuContributions();
        for (MMenuContribution menuContribution : menuContributions) {
            if ("org.simantics.district.region.ui.contextMenu".equals(menuContribution.getParentId())) {
                // ok, add to menu
                createPopupMenu.getChildren().addAll(menuContribution.getChildren());
            }
        }
        
        part.getMenus().add(createPopupMenu);
    }

    public static final String POPUP_ID = "org.simantics.district.region.ui.popup";

    @PostConstruct
    public void postConstruct(ESelectionService selectionService, Composite parent, EMenuService menuService) {
        // System.out.println("construct MPTV");
        this.ui = new DiagramRegionsTableUI(selectionService, parent, 0);
        if (!(menuService.registerContextMenu(this.ui.getTree(), POPUP_ID)))
            LOGGER.warn("Could not register context menu {}", POPUP_ID);
    }

    @PreDestroy
    public void dispose() {
        // System.out.println("dispose MPTV");
        ui.dispose();
        ui = null;
    }

    @Focus
    public void onFocus() {
        ui.setFocus();
    }

}