/**
 ********************************************************************************
 * Copyright (c) 2018-2021 Robert Bosch GmbH and others.
 * 
 * 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.m2t.configuration;

import java.util.Map;

import org.eclipse.app4mc.amalthea.model.AmaltheaFactory;
import org.eclipse.app4mc.transformation.ServiceConstants;
import org.eclipse.app4mc.transformation.executiontype.IModelToTextConfig;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.ConfigurationPolicy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import app4mc.example.transform.m2t.loader.AmaltheaMultiFileLoader2;

@Component(
	configurationPid = ServiceConstants.SESSION_CONFIGURATION_PID,
	configurationPolicy = ConfigurationPolicy.REQUIRE,
	property = { "transformation=Amalthea2Text" },
	service = IModelToTextConfig.class
)
public class M2TTransformationConfig implements IModelToTextConfig {

	private static final Logger LOG = LoggerFactory.getLogger(M2TTransformationConfig.class);

	private AmaltheaMultiFileLoader2 amaltheaMultiFileLoader = new AmaltheaMultiFileLoader2();

	private String folderPath;

	@Activate
	void activate(Map<String, ?> properties) {
		folderPath = (String) properties.get("input_models_folder");
	}

	@Override
	public ResourceSet getInputResourceSet() {

		if (folderPath != null) {

			ResourceSet resourceSet = amaltheaMultiFileLoader.loadMultipleFiles(folderPath);

			if (resourceSet.getResources().isEmpty()) {
				LOG.error("No Amalthea model files are loaded. Verify if the model version is : {}",
						AmaltheaFactory.eINSTANCE.createAmalthea().getVersion());
			}

			return resourceSet;
		} else {
			LOG.error("Input_models_folder parameter not set",
					new NullPointerException("input_models_folder property not set"));
		}

		return null;
	}

}