/*******************************************************************************
 * Copyright (c) 2016, 2018 Willink Transformations and others.
 * 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:
 *     E.D.Willink - initial API and implementation
 *******************************************************************************/
package org.eclipse.qvtd.doc.exe2016.tests.atl;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.m2m.atl.core.IInjector;
import org.eclipse.m2m.atl.core.emf.EMFInjector;
import org.eclipse.m2m.atl.core.emf.EMFModel;
import org.eclipse.m2m.atl.core.emf.EMFModelFactory;
import org.eclipse.m2m.atl.core.emf.EMFReferenceModel;
import org.eclipse.m2m.atl.core.launch.ILauncher;
import org.eclipse.m2m.atl.engine.emfvm.launch.EMFVMLauncher;
import org.eclipse.qvtd.doc.exe2016.tests.AbstractEXE2016CGTests;
import org.eclipse.qvtd.doc.exe2016.tests.DoublyLinkedListGenerator;
import org.eclipse.qvtd.doc.exe2016.tests.PrintAndLog;
import org.eclipse.qvtd.doc.exe2016.tests.qvtc.doublylinkedlist.DoublyLinkedList;
import org.eclipse.qvtd.doc.exe2016.tests.qvtc.doublylinkedlist.DoublylinkedlistPackage;
import org.eclipse.qvtd.pivot.qvtimperative.QVTimperativePivotStandaloneSetup;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * Source code for CG results in EXE 2016, Micro-Mappings paper.
 */
public class EXE2016_ATL_Tests extends AbstractEXE2016CGTests
{
	@Override
	@Before
	public void setUp() throws Exception {
		super.setUp();
		QVTimperativePivotStandaloneSetup.doSetup();
	}

	@Override
	@After
	public void tearDown() throws Exception {
		super.tearDown();
	}

	@Test
	public void testQVTcCompiler_Forward2Reverse_ATL() throws Exception {
		DoublyLinkedListGenerator doublyLinkedListGenerator = new DoublyLinkedListGenerator();
		PrintAndLog logger = new PrintAndLog(getName());
		logger.printf("%s\n", getName());
		/*
		 * Initializations
		 */
		ILauncher transformationLauncher = new EMFVMLauncher();
		EMFModelFactory modelFactory = new EMFModelFactory();
		ResourceSet resourceSet = modelFactory.getResourceSet();
		resourceSet.getPackageRegistry().put(DoublylinkedlistPackage.eNS_URI, DoublylinkedlistPackage.eINSTANCE);
		IInjector injector = new EMFInjector();
		/*
		 * Load metamodels
		 */
		EMFReferenceModel forwardListMetamodel = (EMFReferenceModel)modelFactory.newReferenceModel();
		injector.inject(forwardListMetamodel, DoublylinkedlistPackage.eNS_URI);
		EMFReferenceModel reverseListMetamodel = (EMFReferenceModel)modelFactory.newReferenceModel();
		injector.inject(reverseListMetamodel, DoublylinkedlistPackage.eNS_URI);
		try {
			int[] tests = PrintAndLog.getTestSizes();
			for (int testSize : tests) {
				/*
				 * Load models
				 */
				EMFModel forwardListModel = (EMFModel)modelFactory.newModel(forwardListMetamodel);
				Resource forwardListResource = resourceSet.createResource(URI.createURI("src/org/eclipse/qvtd/doc/exe2016/tests/atl/EmptyList.xmi"));
				try {
					forwardListResource.load(new InputStream() {
						@Override
						public int read()      { return -1; }
						@Override
						public int available() { return 0; }
					}, null);
				}
				catch(Throwable e) {}
				injector.inject(forwardListModel,"src/org/eclipse/qvtd/doc/exe2016/tests/atl/EmptyList.xmi");
				Collection<@NonNull ? extends EObject> rootObjects = doublyLinkedListGenerator.createDoublyLinkedListModel(testSize);
				forwardListResource.getContents().clear();
				forwardListResource.getContents().addAll(rootObjects);
				EMFModel reverseListModel = (EMFModel)modelFactory.newModel(reverseListMetamodel);

				transformationLauncher.initialize(new HashMap<String,Object>());
				transformationLauncher.addInModel(forwardListModel, "IN", "ForwardList");
				transformationLauncher.addOutModel(reverseListModel, "OUT", "ReverseList");

				logger.printf("%9d, ", testSize);
				garbageCollect();
				long startTime = System.nanoTime();
				transformationLauncher.launch(ILauncher.RUN_MODE, new NullProgressMonitor(), new HashMap<String,Object>(),
					new FileInputStream("src/org/eclipse/qvtd/doc/exe2016/tests/atl/Forward2Reverse.asm"));
				long endTime = System.nanoTime();
				logger.printf("%9.6f\n", (endTime - startTime) / 1.0e9);

				Resource reverseListResource = reverseListModel.getResource();
				Collection<@NonNull EObject> rootObjects2 = reverseListResource.getContents();
				Iterator<@NonNull EObject> it = rootObjects2.iterator();
				Object rootObject = it.next();
				assert !it.hasNext();
				assert ((DoublyLinkedList)rootObject).getOwnedElements().size() == testSize-1;
				doublyLinkedListGenerator.checkModel((DoublyLinkedList) rootObject, testSize);
				/*
				 * Unload all models
				 */
				modelFactory.unload(reverseListModel);
				modelFactory.unload(forwardListModel);
			}
		}
		finally {
			/*
			 * Unload all metamodels
			 */
			modelFactory.unload(forwardListMetamodel);
			modelFactory.unload(reverseListMetamodel);
			logger.dispose();
		}
	}
}