/*
 * Copyright 2002-2014 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
 *
 * http://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 samples;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.io.ClassPathResource;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.security.data.repository.query.SecurityEvaluationContextExtension;
import org.springframework.transaction.PlatformTransactionManager;
import samples.data.Message;

import javax.sql.DataSource;

/**
 * @author Rob Winch
 */
@Configuration
@ComponentScan
@EnableJpaRepositories
public class DataConfig {

	@Bean
	public SecurityEvaluationContextExtension expressionEvaluationContextProvider() {
		return new SecurityEvaluationContextExtension();
	}

	@Bean
	public DataSource dataSource() {
		EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
		return builder.setType(EmbeddedDatabaseType.HSQL).build();
	}

	@Bean
	public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
		HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
		vendorAdapter.setDatabase(Database.HSQL);
		vendorAdapter.setGenerateDdl(true);

		LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
		factory.setJpaVendorAdapter(vendorAdapter);
		factory.setPackagesToScan(Message.class.getPackage().getName());
		factory.setDataSource(dataSource());

		return factory;
	}

	@Bean
	@DependsOn("entityManagerFactory")
	public ResourceDatabasePopulator initDatabase(DataSource dataSource) throws Exception {
		ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
		populator.addScript(new ClassPathResource("data.sql"));
		populator.populate(dataSource.getConnection());
		return populator;
	}

	@Bean
	public PlatformTransactionManager transactionManager() {
		JpaTransactionManager txManager = new JpaTransactionManager();
		txManager.setEntityManagerFactory(entityManagerFactory().getObject());
		return txManager;
	}
}
