package org.eclipse.emf.compare.impl;

import java.io.File;
import java.net.URI;

import org.eclipse.emf.compare.Comparison;
import org.eclipse.emf.compare.EMFCompare;
import org.eclipse.emf.compare.match.DefaultComparisonFactory;
import org.eclipse.emf.compare.match.DefaultEqualityHelperFactory;
import org.eclipse.emf.compare.match.DefaultMatchEngine;
import org.eclipse.emf.compare.match.IComparisonFactory;
import org.eclipse.emf.compare.match.IMatchEngine;
import org.eclipse.emf.compare.match.eobject.IEObjectMatcher;
import org.eclipse.emf.compare.match.impl.MatchEngineFactoryImpl;
import org.eclipse.emf.compare.match.impl.MatchEngineFactoryRegistryImpl;
import org.eclipse.emf.compare.scope.IComparisonScope;
import org.eclipse.emf.compare.utils.UseIdentifiers;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.emf.ecore.xmi.impl.XMIResourceFactoryImpl;

/**
 * @since 3.1
 */
public class Mcompare {

	public Comparison compare(File model1, File model2) {
		// Load the two input models
		ResourceSet resourceSet1 = new ResourceSetImpl();
		ResourceSet resourceSet2 = new ResourceSetImpl();
		String xmi1 = "path/to/first/model.xmi";
		String xmi2 = "path/to/second/model.xmi";
		load(xmi1, resourceSet1);
		load(xmi2, resourceSet2);

		// Configure EMF Compare
		IEObjectMatcher matcher = DefaultMatchEngine.createDefaultEObjectMatcher(UseIdentifiers.NEVER);
		IComparisonFactory comparisonFactory = new DefaultComparisonFactory(
				new DefaultEqualityHelperFactory());
		IMatchEngine.Factory matchEngineFactory = new MatchEngineFactoryImpl(matcher, comparisonFactory);
		matchEngineFactory.setRanking(20);
		IMatchEngine.Factory.Registry matchEngineRegistry = new MatchEngineFactoryRegistryImpl();
		matchEngineRegistry.add(matchEngineFactory);
		EMFCompare comparator = EMFCompare.builder().setMatchEngineFactoryRegistry(matchEngineRegistry)
				.build();

		// Compare the two models
		IComparisonScope scope = EMFCompare.createDefaultScope(resourceSet1, resourceSet2);
		return comparator.compare(scope);
	}

	private void load(String absolutePath, ResourceSet resourceSet) {
		URI uri = URI.createFileURI(absolutePath);

		resourceSet.getResourceFactoryRegistry().getExtensionToFactoryMap().put("xmi",
				new XMIResourceFactoryImpl());

		// Resource will be loaded within the resource set
		resourceSet.getResource(uri, true);
	}

	public static void main(String[] args) {
		// for standalone usage
		IMatchEngine.Factory.Registry registry = MatchEngineFactoryRegistryImpl.createStandaloneInstance();
		// for OSGi (IDE, RCP) usage
		// IMatchEngine.Factory.Registry registry = EMFCompareRCPPlugin.getMatchEngineFactoryRegistry();
		final IMatchEngine customMatchEngine = new comparador();
		IMatchEngine.Factory engineFactory = new MatchEngineFactoryImpl() {
		  @Override
		public IMatchEngine getMatchEngine() {
		    return customMatchEngine;
		  }
		};
		engineFactory.setRanking(20); // default engine ranking is 10, must be higher to override.
		registry.add(engineFactory);
		EMFCompare.builder().setMatchEngineFactoryRegistry(registry).build().compare(scope);
	}
}