/*******************************************************************************
 *
 * Copyright (c) 2018, 2020 Robert Bosch GmbH.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Robert Bosch GmbH - initial API and implementation
 *******************************************************************************/
package app4mc.example.transform.product.handlers;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Properties;

import javax.inject.Named;

import org.eclipse.app4mc.transformation.TransformationConstants;
import org.eclipse.app4mc.transformation.TransformationProcessor;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.e4.core.di.annotations.Execute;
import org.eclipse.e4.core.di.extensions.Service;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Shell;
import org.osgi.framework.Bundle;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings("restriction")
public class SampleHandler   {
	
	private static final Logger LOG = LoggerFactory.getLogger(SampleHandler.class);
	
	@Execute
	public Object execute(Shell shell,
			@Service TransformationProcessor cmd,
			@Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection) throws ExecutionException {

		LOG.debug("\n\n\n****************************************************************************************************************");
		LOG.debug("TransformationProcessor : {}", cmd.hashCode());
		try {

			Properties properties = new Properties();
			String input = getResourceFromPlugin("/input/amalthea_models");
			properties.put("input_models_folder", input);
			File inputFile = new File(input);
			File parentFile = inputFile.getParentFile().getParentFile();
			properties.put(TransformationConstants.OUTPUT_FOLDER, new File(parentFile + File.separator + "output/amalthea_models").getCanonicalPath());

			properties.put(TransformationConstants.M2M_TRANSFORMERS, "Amalthea2SampleModel");
			properties.put(TransformationConstants.M2T_TRANSFORMERS, "Amalthea2Text");
			
			cmd.startTransformation(properties);
//			cmd.startTransformation(new File(getResourceFromPlugin("/input.properties")));
			
		} catch (Exception e) {
			ErrorDialog.openError(shell, "Error", e.getMessage(), Status.OK_STATUS);
		}

		LOG.debug("****************************************************************************************************************");
		return null; 
	} 

	public String getResourceFromPlugin(String path) throws IOException {

		Bundle bundle = Platform.getBundle("app4mc.example.transform.product");
		
		if (bundle != null) {
			URL entry = bundle.getEntry(path);
			if (entry != null) {
				URL fileURL = FileLocator.toFileURL(entry);
				if (fileURL != null) {
					return fileURL.getFile();
				}
			}
		} else {
			LOG.error("Bundle app4mc.example.transform.product is not available, and due to this reason input.properties file can not be fetched");
		}
		return null;
	}

	 
}