package im.rosetta.database;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
    private static final SessionFactory sessionFactory;

    static {
        try {
            Configuration cfg = new Configuration().configure();

            String host = System.getenv("DB_HOST");
            String port = System.getenv("DB_PORT");
            String user = System.getenv("DB_USER");
            String pass = System.getenv("DB_PASSWORD");
            String name = System.getenv("DB_NAME");
            String url = String.format("jdbc:postgresql://%s:%s/%s", host, port, name);
            cfg.setProperty("hibernate.connection.url", url);
            cfg.setProperty("hibernate.connection.username", user);
            cfg.setProperty("hibernate.connection.password", pass); 

            sessionFactory = cfg.buildSessionFactory();
        } catch (Exception e) {
            e.printStackTrace();
            throw new ExceptionInInitializerError("Error initializing Hibernate: " + e.getMessage());
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static Session getCurrentSession() {
        return sessionFactory.getCurrentSession();
    }

    public static Session openSession() {
        return sessionFactory.openSession();
    }

    public static void shutdown() {
        sessionFactory.close();
    }
}