package com.ankurm.hibernatedemo.mappingstyle;

import static org.assertj.core.api.Assertions.assertThat;

import com.ankurm.hibernatedemo.HibernateDemoApplication;
import jakarta.persistence.EntityManager;
import jakarta.persistence.EntityManagerFactory;
import java.util.List;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.TestPropertySource;

/**
 * Proves that {@code spring.jpa.mapping-resources} is the Spring Boot 4.1.1 wiring that makes
 * an orm.xml-only mapping (no {@code @Entity} at all) a real managed JPA entity, backed by a
 * table ({@code xml_only_widgets}) that ONLY orm.xml knows about.
 *
 * <p>Docs: docs/04-annotations-vs-xml.md, Topic 1.
 */
@SpringBootTest(classes = HibernateDemoApplication.class)
@TestPropertySource(properties = {
        "spring.jpa.mapping-resources=orm-xml-only-mapping.xml"
})
class OrmXmlMappingResourcesTest {

    @Autowired
    private EntityManagerFactory emf;

    @Test
    void ormXmlOnlyEntity_isManaged_andRoundTripsThroughItsOwnTable() {
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        OrmXmlOnlyEntity e = new OrmXmlOnlyEntity("mapped-by-orm-xml-only");
        em.persist(e);
        em.getTransaction().commit();
        Long id = e.getId();
        em.close();

        assertThat(id).isNotNull();

        EntityManager em2 = emf.createEntityManager();
        // This JPQL uses the entity name (defaults to simple class name) -- proves the entity is
        // registered in metadata purely via orm.xml, with zero annotations on the Java class.
        List<OrmXmlOnlyEntity> found = em2.createQuery(
                "select o from OrmXmlOnlyEntity o where o.label = :label", OrmXmlOnlyEntity.class)
                .setParameter("label", "mapped-by-orm-xml-only")
                .getResultList();
        em2.close();

        assertThat(found).hasSize(1);
        assertThat(found.get(0).getId()).isEqualTo(id);
        System.out.println("RESULT[orm-xml-only]: persisted+queried id=" + id
                + " via JPQL against entity mapped ENTIRELY by orm.xml (table xml_only_widgets), zero annotations on the Java class.");
    }
}