package com.baeldung.config;

import com.baeldung.services.IBarService;
import com.baeldung.services.impl.BarSpringDataJpaService;
import com.google.common.base.Preconditions;
import com.baeldung.dao.repositories.impl.ExtendedRepositoryImpl;
import com.baeldung.services.IFooService;
import com.baeldung.services.impl.FooService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.*;
import org.springframework.core.env.Environment;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import javax.sql.DataSource;
import java.util.Properties;

@Configuration
@ComponentScan({"com.baeldung.dao", "com.baeldung.services"})
@EnableTransactionManagement
@EnableJpaRepositories(basePackages = {"com.baeldung.dao"}, repositoryBaseClass = ExtendedRepositoryImpl.class)
@EnableJpaAuditing
@PropertySource("classpath:persistence.properties")
public class PersistenceConfiguration {

    @Autowired
    private Environment env;

    public PersistenceConfiguration() {
        super();
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        final LocalContainerEntityManagerFactoryBean emf = new LocalContainerEntityManagerFactoryBean();
        emf.setDataSource(dataSource());
        emf.setPackagesToScan("com.baeldung.domain");

        final JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        emf.setJpaVendorAdapter(vendorAdapter);
        emf.setJpaProperties(hibernateProperties());

        return emf;
    }

    @Bean
    public DataSource dataSource() {
        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
        dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
        dataSource.setUsername(Preconditions.checkNotNull(env.getProperty("jdbc.user")));
        dataSource.setPassword(Preconditions.checkNotNull(env.getProperty("jdbc.pass")));

        return dataSource;
    }

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

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }

    @Bean
    public IBarService barSpringDataJpaService() {
        return new BarSpringDataJpaService();
    }

    @Bean
    public IFooService fooService() {
        return new FooService();
    }

    private final Properties hibernateProperties() {
        final Properties hibernateProperties = new Properties();
        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
        hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));

        hibernateProperties.setProperty("hibernate.show_sql", "true");
        // hibernateProperties.setProperty("hibernate.format_sql", "true");
        // hibernateProperties.setProperty("hibernate.globally_quoted_identifiers", "true");

        // Envers properties
        hibernateProperties.setProperty("org.hibernate.envers.audit_table_suffix", env.getProperty("envers.audit_table_suffix"));

        return hibernateProperties;
    }

}