import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;

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

@Configuration
public class PersistanceContext implements TransactionManagementConfigurer {

    @Bean
    @Primary
    public DataSource configureDataSource(Environment env) {
        org.apache.commons.dbcp.BasicDataSource source =new org.apache.commons.dbcp.BasicDataSource();
        source.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
        source.setPassword(env.getProperty("spring.datasource.password"));
        source.setUsername(env.getProperty("spring.datasource.username"));
        source.setUrl(env.getProperty("spring.datasource.url"));
        return source;
    }

    @Bean
    LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource,
                                                                Environment env) {
        LocalContainerEntityManagerFactoryBean bean = new LocalContainerEntityManagerFactoryBean();
        bean.setDataSource(dataSource);

        HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
        adapter.setDatabasePlatform(env.getProperty("spring.jpa.database-platform"));
        adapter.setShowSql(env.getProperty("spring.jpa.properties.hibernate.show_sql", Boolean.class));

        bean.setJpaVendorAdapter(adapter);

        Properties properties = new Properties();

        properties.put("hibernate.show_sql", env.getProperty("spring.jpa.properties.hibernate.show_sql", Boolean.class));
        properties.put("hibernate.cache.provider_class", env.getProperty("spring.jpa.properties.hibernate.cache.provider_class"));
        properties.put("hibernate.cache.use_second_level_cache", env.getProperty("spring.jpa.properties.hibernate.cache.use_second_level_cache", Boolean.class));

        bean.setJpaProperties(properties);
        bean.setPackagesToScan("GrowUp.Model");
        return bean;
    }

    @Bean
    JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory, Environment env)
    {
        JpaTransactionManager manager = new JpaTransactionManager();
        manager.setEntityManagerFactory(entityManagerFactory);

        return manager;
    }

    @Bean
    public PlatformTransactionManager annotationDrivenTransactionManager(JpaTransactionManager transactionManager) {
        return transactionManager;
    }

    @Bean
    public PlatformTransactionManager annotationDrivenTransactionManager() {
        return new JpaTransactionManager();
    }
}