package org.simantics.district.route.ui;

import java.util.List;

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

import org.eclipse.e4.core.services.events.IEventBroker;
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 Tuukka Lehtonen
 * @since 6.08
 */
public class RouteView {

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

    private static final String POPUP_CONTRIBUTION_ID = "org.simantics.district.route.ui.contextMenu";
    public static final String POPUP_ELEMENT_ID = "org.simantics.district.route.ui.popup";

    @Inject ESelectionService selectionService;
    @Inject IEventBroker broker;
    RouteTree 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 context menu via fragment at this point
     */
    @Inject
    public void init(MPart part, MApplication app) {
        MPopupMenu popupMenu = MMenuFactory.INSTANCE.createPopupMenu();
        popupMenu.setElementId(POPUP_ELEMENT_ID);
        List<MMenuContribution> menuContributions = app.getMenuContributions();
        for (MMenuContribution menuContribution : menuContributions) {
            if (POPUP_CONTRIBUTION_ID.equals(menuContribution.getParentId())) {
                // ok, add to menu
                popupMenu.getChildren().addAll(menuContribution.getChildren());
            }
        }
        part.getMenus().add(popupMenu);
        
        /**
         * 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
         */
        MToolBar toolBar = MMenuFactory.INSTANCE.createToolBar();
        toolBar.setToBeRendered(true);
        toolBar.getChildren().add(createActivateRouteToolItem(app));
        toolBar.getChildren().add(createDeactivateRouteToolItem(app));
        part.setToolbar(toolBar);
    }


    private static MHandledToolItem createActivateRouteToolItem(MApplication app) {
        MHandledToolItem createHandledToolItem = MMenuFactory.INSTANCE.createHandledToolItem();
        createHandledToolItem.setCommand(app.getCommand("org.simantics.district.route.ui.command.activatecreateroute")); // Command is contributed via fragment //$NON-NLS-1$
        createHandledToolItem.setLabel("Activate create route");
        createHandledToolItem.setIconURI("platform:/plugin/com.famfamfam.silk/icons/table_add.png"); //$NON-NLS-1$
        createHandledToolItem.setEnabled(true);
        return createHandledToolItem;
    }

    private static MHandledToolItem createDeactivateRouteToolItem(MApplication app) {
        MHandledToolItem createHandledToolItem = MMenuFactory.INSTANCE.createHandledToolItem();
        createHandledToolItem.setCommand(app.getCommand("org.simantics.district.route.ui.command.deactivatecreateroute")); // Command is contributed via fragment //$NON-NLS-1$
        createHandledToolItem.setLabel("Deactivate create route");
        createHandledToolItem.setIconURI("platform:/plugin/com.famfamfam.silk/icons/table_edit.png"); //$NON-NLS-1$
        createHandledToolItem.setEnabled(true);
        return createHandledToolItem;
    }

    @PostConstruct
    public void postConstruct(Composite parent, EMenuService menuService) {
        this.ui = new RouteTree(parent, 0, selectionService);
        if (!(menuService.registerContextMenu(this.ui.getTree(), POPUP_ELEMENT_ID)))
            LOGGER.warn("Could not register context menu {}", POPUP_ELEMENT_ID);
    }

    @PreDestroy
    public void dispose() {
        ui = null;
    }

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

    public void editCurrentSelection() {
        ui.editCurrentSelection();
    }

}