/*
 * 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.envers.test.integration.strategy;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

import javax.persistence.CollectionTable;
import javax.persistence.ElementCollection;
import javax.persistence.Embeddable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OrderColumn;

import org.hibernate.envers.Audited;
import org.hibernate.envers.configuration.EnversSettings;
import org.hibernate.envers.strategy.ValidityAuditStrategy;
import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
import org.hibernate.envers.test.Priority;
import org.hibernate.testing.TestForIssue;
import org.hibernate.testing.transaction.TransactionUtil;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

/**
 * A {@link ValidityAuditStrategy} test that verifies that the {@code REVEND} field
 * for embedded component collection entries is updated when the component contains
 * {@code null} properties and is removed from the component collection.
 *
 * @author Chris Cranford
 */
@TestForIssue(jiraKey = "HHH-11214")
public class ValidityAuditStrategyComponentCollectionRevEndTest extends BaseEnversJPAFunctionalTestCase {
	private Integer productId;

	@Override
	protected Class<?>[] getAnnotatedClasses() {
		return new Class<?>[] { Product.class };
	}

	@Override
	protected void addConfigOptions(Map options) {
		super.addConfigOptions( options );
		options.put( EnversSettings.AUDIT_STRATEGY, ValidityAuditStrategy.class.getName() );
	}

	@Test
	@Priority(10)
	public void initData() {
		// Revision 1
		this.productId = TransactionUtil.doInJPA( this::entityManagerFactory, entityManager -> {
			Product product = new Product( 1 , "Test" );
			product.getItems().add( new Item( "bread", null ) );
			entityManager.persist( product );
			return product.getId();
		} );

		// Revision 2
		TransactionUtil.doInJPA( this::entityManagerFactory, entityManager -> {
			Product product = entityManager.find( Product.class, productId );
			product.getItems().add( new Item( "bread2", 2 ) );
			entityManager.merge( product );
		} );

		// Revision 3
		TransactionUtil.doInJPA( this::entityManagerFactory, entityManager -> {
			Product product = entityManager.find( Product.class, productId );
			product.getItems().remove( 0 );
			entityManager.merge( product );
		} );
	}

	@Test
	public void testRevisionCounts() {
		assertEquals( Arrays.asList( 1, 2, 3 ), getAuditReader().getRevisions( Product.class, productId ) );
	}

	@Test
	public void testRevision1() {
		final Product product = getAuditReader().find( Product.class, productId, 1 );
		assertEquals( 1, product.getItems().size() );
		assertEquals( "bread", product.getItems().get( 0 ).getName() );
	}

	@Test
	public void testRevision2() {
		final Product product = getAuditReader().find( Product.class, productId, 2 );
		assertEquals( 2, product.getItems().size() );
		assertEquals( "bread", product.getItems().get( 0 ).getName() );
		assertEquals( "bread2", product.getItems().get( 1 ).getName() );
	}

	@Test
	public void testRevision3() {
		final Product product = getAuditReader().find( Product.class, productId, 3 );
		assertEquals( 1, product.getItems().size() );
		assertEquals( "bread2", product.getItems().get( 0 ).getName() );
	}

	@Entity(name = "Product")
	@Audited
	public static class Product {
		@Id
		private Integer id;

		private String name;

		@ElementCollection
		@CollectionTable(name = "items", joinColumns = @JoinColumn(name = "productId"))
		@OrderColumn(name = "position")
		private List<Item> items = new ArrayList<Item>();

		Product() {

		}

		Product(Integer id, String name) {
			this.id = id;
			this.name = name;
		}

		public Integer getId() {
			return id;
		}

		public void setId(Integer id) {
			this.id = id;
		}

		public String getName() {
			return name;
		}

		public void setName(String name) {
			this.name = name;
		}

		public List<Item> getItems() {
			return items;
		}

		public void setItems(List<Item> items) {
			this.items = items;
		}

		@Override
		public int hashCode() {
			int result = id != null ? id.hashCode() : 0;
			result = 31 * result + ( name != null ? name.hashCode() : 0 );
			result = 31 * result + ( items != null ? items.hashCode() : 0 );
			return result;
		}

		@Override
		public boolean equals(Object object) {
			if ( this == object ) {
				return true;
			}
			if ( object == null | getClass() != object.getClass() ) {
				return false;
			}

			Product that = (Product) object;
			if ( id != null ? !id.equals( that.id ) : that.id != null ) {
				return false;
			}
			if ( name != null ? !name.equals( that.name ) : that.name != null ) {
				return false;
			}
			return !( items != null ? !items.equals( that.items ) : that.items != null );
		}
	}

	@Embeddable
	@Audited
	public static class Item {
		private String name;
		private Integer value;

		Item() {

		}

		Item(String name, Integer value) {
			this.name = name;
			this.value = value;
		}

		public String getName() {
			return name;
		}

		public void setName(String name) {
			this.name = name;
		}

		public Integer getValue() {
			return value;
		}

		public void setValue(Integer value) {
			this.value = value;
		}

		@Override
		public int hashCode() {
			int result = name != null ? name.hashCode() : 0;
			result = 31 * result + ( value != null ? value.hashCode() : 0 );
			return result;
		}

		@Override
		public boolean equals(Object object) {
			if ( this == object ) {
				return true;
			}
			if ( object == null || getClass() != object.getClass() ) {
				return false;
			}

			Item that = (Item) object;
			if ( name != null ? !name.equals( that.name ) : that.name != null ) {
				return false;
			}
			return !( value != null ? !value.equals( that.value ) : that.value != null );
		}
	}
}