package org.simantics.plant3d.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.simantics.Simantics;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.request.WriteRequest;
import org.simantics.db.common.utils.NameUtils;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.adapter.ActionFactory;
import org.simantics.layer0.Layer0;
import org.simantics.plant3d.Activator;
import org.simantics.plant3d.utils.P3DUtil;

public class NewPlantHandler extends AbstractHandler implements ActionFactory {

	// Action factory method
	@Override
	public Runnable create(final Object target) {
		if (!(target instanceof Resource))
			return null;
		
		return new Runnable() {
			@Override
			public void run() {
				createNewPlantJob((Resource) target);
			}
		};
	}
	
	// Handler method
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		final Resource library = Simantics.getProject().get();
		
		createNewPlantJob(library);
		return null;
	}

	/**
	 * Create a new plant as a user-triggered job.
	 * 
	 * @param library  Parent resource for the new plant.
	 */
	public static void createNewPlantJob(final Resource library) {
		Job job = new Job("Create Plant ") {
			@Override
			protected IStatus run(IProgressMonitor monitor) {
				monitor.beginTask("Create Plant" , IProgressMonitor.UNKNOWN);
				try {
					Simantics.getSession().syncRequest(new WriteRequest() {
						
						@Override
						public void perform(WriteGraph graph) throws DatabaseException {
							Layer0 l0 = Layer0.getInstance(graph);
							String modelName = NameUtils.findFreshName(graph, "Plant", library);
							Resource model = P3DUtil.createModel(graph, modelName);
							graph.claim(library, l0.ConsistsOf, model);
							
						}
					});
					return Status.OK_STATUS;
				} catch (DatabaseException e) {
					return new Status(IStatus.ERROR, Activator.PLUGIN_ID, getName() + " failed.",e);
				}
			}
			
			
		};
		job.setUser(true);
		job.schedule();
	}
}