/*******************************************************************************
 * Copyright (c) 2016 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Semantum Oy - initial API and implementation
 *******************************************************************************/
package org.simantics.modeling.actions;

import org.eclipse.ui.PlatformUI;
import org.simantics.Simantics;
import org.simantics.databoard.Bindings;
import org.simantics.db.Resource;
import org.simantics.db.common.primitiverequest.PossibleRelatedValue2;
import org.simantics.db.common.utils.Logger;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.adapter.ActionFactory;
import org.simantics.modeling.ModelingResources;

public class Help implements ActionFactory {

	@Override
	public Runnable create(Object target) {

		if(!(target instanceof Resource))
			return null;

		final Resource resource = (Resource)target;
		
		return new Runnable() {
			@Override
			public void run() {
				
				try {
					ModelingResources MOD = ModelingResources.getInstance(Simantics.getSession());
					String id = Simantics.sync(new PossibleRelatedValue2<String>(resource, MOD.contextualHelpId, Bindings.STRING));
					if(id == null) {
						PlatformUI.getWorkbench().getHelpSystem().displayDynamicHelp();
						return;
					}
					PlatformUI.getWorkbench().getHelpSystem().displayHelp(id);
				} catch (DatabaseException e) {
					Logger.defaultLogError(e);
				}
				
			}
		}; 
	}
}