/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.test.events;

import java.util.Set;

import org.hibernate.HibernateException;
import org.hibernate.SessionFactory;
import org.hibernate.SessionFactoryObserver;
import org.hibernate.boot.Metadata;
import org.hibernate.boot.registry.BootstrapServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.event.spi.DeleteEvent;
import org.hibernate.event.spi.DeleteEventListener;
import org.hibernate.event.spi.EventType;
import org.hibernate.integrator.spi.Integrator;
import org.hibernate.service.spi.SessionFactoryServiceRegistry;

import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.junit.Test;

import static org.junit.Assert.assertEquals;


/**
 * CallbackTest implementation
 *
 * @author Steve Ebersole
 */
public class CallbackTest extends BaseCoreFunctionalTestCase {
	private TestingObserver observer = new TestingObserver();
	private TestingListener listener = new TestingListener();

	@Override
    public String[] getMappings() {
		return NO_MAPPINGS;
	}

	@Override
    public void configure(Configuration cfg) {
		cfg.setSessionFactoryObserver( observer );
	}

	@Override
	protected void prepareBootstrapRegistryBuilder(BootstrapServiceRegistryBuilder builder) {
		super.prepareBootstrapRegistryBuilder( builder );
		builder.applyIntegrator(
				new Integrator() {
					@Override
					public void integrate(
							Metadata metadata,
							SessionFactoryImplementor sessionFactory,
							SessionFactoryServiceRegistry serviceRegistry) {
						integrate( serviceRegistry );
					}

					private void integrate(SessionFactoryServiceRegistry serviceRegistry) {
						serviceRegistry.getService( EventListenerRegistry.class ).setListeners(
								EventType.DELETE,
								listener
						);
						listener.initialize();
					}

					@Override
					public void disintegrate(
							SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
						listener.cleanup();
					}
				}
		);
	}

	@Test
	public void testCallbacks() {
		// test pre-assertions
		assert observer.closingCount == 0;
		assert observer.closedCount == 0;
		assertEquals( "observer not notified of creation", 1, observer.creationCount );
		assertEquals( "listener not notified of creation", 1, listener.initCount );

		sessionFactory().close();

		assertEquals( "observer not notified of closing", 1, observer.closingCount );
		assertEquals( "observer not notified of close", 1, observer.closedCount );
		assertEquals( "listener not notified of close", 1, listener.destoryCount );
	}

	private static class TestingObserver implements SessionFactoryObserver {
		private int creationCount = 0;
		private int closedCount = 0;
		private int closingCount = 0;

		public void sessionFactoryCreated(SessionFactory factory) {
			creationCount++;
		}

		@Override
		public void sessionFactoryClosing(SessionFactory factory) {
			closingCount++;
		}

		public void sessionFactoryClosed(SessionFactory factory) {
			closedCount++;
		}
	}

	private static class TestingListener implements DeleteEventListener {
		private int initCount = 0;
		private int destoryCount = 0;

		public void initialize() {
			initCount++;
		}

		public void cleanup() {
			destoryCount++;
		}

		public void onDelete(DeleteEvent event) throws HibernateException {
		}

		public void onDelete(DeleteEvent event, Set transientEntities) throws HibernateException {
		}
	}
}