/*******************************************************************************
 * Copyright (c) 2019 CEA LIST.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *     	Shuai Li (CEA LIST) <shuai.li@cea.fr> - initial API and implementation
 *******************************************************************************/
package org.eclipse.papyrus.iotml.wot.td.codegen.transformation;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.papyrus.designer.languages.common.base.HierarchyLocationStrategy;
import org.eclipse.papyrus.designer.languages.common.base.ModelElementsCreator;
import org.eclipse.papyrus.infra.tools.file.ProjectBasedFileAccess;
import org.eclipse.papyrus.iotml.wot.Thing;
import org.eclipse.papyrus.iotml.wot.td.codegen.generator.ThingGenerator;
import org.eclipse.uml2.uml.Element;
import org.eclipse.uml2.uml.PackageableElement;
import org.eclipse.uml2.uml.Property;
import org.eclipse.uml2.uml.util.UMLUtil;

/**
 * Main class of TD code generator.
 */
public class TDModelElementsCreator extends ModelElementsCreator {

	private static final String TD_LANG = "TD"; //$NON-NLS-1$
	
	private static final String JSON_SUFFIX = "json";

	protected String tdExt;

	/**
	 * Constructor.
	 * 
	 * @param project
	 *            the project in which the generated code should be placed
	 * @param modelToTD
	 *            the translation of the Model to the TD code
	 */
	public TDModelElementsCreator(IProject project, PackageableElement pe) {
		this(project, TD_LANG, pe);
	}

	/**
	 * Constructor.
	 * 
	 * @param project
	 *            the project in which the generated code should be placed
	 * @param language
	 *            the generator language
	 * @param modelToTD
	 *            the translation of the Model to the TD code
	 */
	public TDModelElementsCreator(IProject project, String language, PackageableElement pe) {
		super(new ProjectBasedFileAccess(project), new HierarchyLocationStrategy(), language);
		this.project = project;
		tdExt = JSON_SUFFIX;
	}


	/**
	 * @see org.eclipse.papyrus.designer.languages.common.base.ModelElementsCreator#noCodeGen(org.eclipse.uml2.uml.Element)
	 *
	 * @param element
	 * @return
	 */
	@Override
	protected boolean noCodeGen(Element element) {
		return false;
	}

	/**
	 * @see org.eclipse.papyrus.designer.languages.common.base.ModelElementsCreator#createPackageableElementFile(org.eclipse.uml2.uml.PackageableElement, org.eclipse.core.runtime.IProgressMonitor)
	 *
	 * @param pe
	 * @param monitor
	 */
	@Override
	protected void createPackageableElementFile(PackageableElement pe, IProgressMonitor monitor) {
		generateThing(pe);
		for (Element element : pe.allOwnedElements()) {
			if (element instanceof Property) {
				Property property = (Property) element;
				if (property.getType() != null) {
					generateThing(property.getType());
				}
			}
			generateThing(element);
		}
	}

	/**
	 * Generate the TD code for each sub entity.
	 * 
	 * @param topEntity
	 *            the top entity (top class)
	 * @param modelToTD
	 *            the translation of the Model to the TD code
	 */
	private void generateThing(Element element) {
		Thing thing = UMLUtil.getStereotypeApplication(element, Thing.class);
		if (thing != null) {
			generateTDCode(thing);
		}
	}


	/**
	 * Generate the final TD code file.
	 */
	private void generateTDCode(Thing thing) {
		String result = ThingGenerator.generateTDCode(thing).toString();
		String fileNameTD = locStrategy.getFileName(thing.getBase_Class()) + "." + tdExt; //$NON-NLS-1$
		fileSystemAccess.generateFile(fileNameTD, result);
	}
}