/*
 * Copyright 2014-2023 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.jpa.repository.support;

import static org.assertj.core.api.Assertions.*;
import static org.mockito.Mockito.*;

import jakarta.persistence.EntityManagerFactory;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;

/**
 * Unit tests for {@link EntityManagerBeanDefinitionRegistrarPostProcessor}.
 *
 * @author Oliver Gierke
 * @author Jens Schauder
 * @author Mark Paluch
 */
class EntityManagerBeanDefinitionRegistrarPostProcessorUnitTests {

	@Test // DATAJPA-453
	void findsBeanDefinitionInParentBeanFactory() {

		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
		beanFactory.registerBeanDefinition("factory", new RootBeanDefinition(LocalContainerEntityManagerFactoryBean.class));

		ConfigurableListableBeanFactory childFactory = new DefaultListableBeanFactory(beanFactory);

		BeanFactoryPostProcessor processor = new EntityManagerBeanDefinitionRegistrarPostProcessor();
		processor.postProcessBeanFactory(childFactory);

		assertThat(beanFactory.getBeanDefinitionCount()).isEqualTo(2);
	}

	@Test // DATAJPA-1005, DATAJPA-1045
	void discoversFactoryBeanReturningConcreteEntityManagerFactoryType() {

		BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(StubEntityManagerFactoryBean.class);
		builder.addConstructorArgValue(SpecialEntityManagerFactory.class);

		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
		beanFactory.registerBeanDefinition("factory", builder.getBeanDefinition());

		BeanFactoryPostProcessor processor = new EntityManagerBeanDefinitionRegistrarPostProcessor();
		processor.postProcessBeanFactory(beanFactory);

		assertThat(beanFactory.getBeanDefinitionCount()).isEqualTo(2);
	}

	@Test // gh-2699
	void avoidsDuplicateBeanRegistrations() {

		BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(StubEntityManagerFactoryBean.class);
		builder.addConstructorArgValue(SpecialEntityManagerFactory.class);

		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
		beanFactory.registerBeanDefinition("factory", builder.getBeanDefinition());

		beanFactory.registerBeanDefinition("jpaSharedEM_AWC_factory",
				BeanDefinitionBuilder.rootBeanDefinition(Object.class).getBeanDefinition());

		BeanFactoryPostProcessor processor = new EntityManagerBeanDefinitionRegistrarPostProcessor();
		processor.postProcessBeanFactory(beanFactory);

		assertThat(beanFactory.getBeanDefinitionCount()).isEqualTo(2);
	}

	interface SpecialEntityManagerFactory extends EntityManagerFactory {}

	static class StubEntityManagerFactoryBean extends LocalContainerEntityManagerFactoryBean {

		private final Class<? extends EntityManagerFactory> emfType;

		StubEntityManagerFactoryBean(Class<? extends EntityManagerFactory> emfType) {
			this.emfType = emfType;
		}

		@Override
		public Class<? extends EntityManagerFactory> getObjectType() {
			return emfType;
		}

		@Override
		protected EntityManagerFactory createEntityManagerFactoryProxy(EntityManagerFactory emf) {
			return mock(emfType);
		}
	}
}
