package com.ankurm.hibernatedemo.persistenceannotations;

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

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

/**
 * MixedAccessEntity has FIELD access by default (because @Id sits on a field), but one
 * property ("computedLabel") is explicitly switched to PROPERTY access. This proves:
 * (1) Hibernate really does call the getter -- not read a backing field -- to determine the
 * persisted value for that one property, and (2) it calls it MORE than once per flush
 * (dirty-check read + write), which matters if the getter has side effects or is expensive.
 *
 * <p>Docs: docs/05-jpa-persistence-annotations.md, Topic 2.
 */
@SpringBootTest(classes = HibernateDemoApplication.class)
class MixedAccessTest {

    @Autowired
    private EntityManagerFactory emf;

    @Test
    void propertyAccessAttribute_getterIsCalledByHibernate_multipleTimesPerFlush() {
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        MixedAccessEntity e = new MixedAccessEntity("widget");
        int callsBeforePersist = e.getGetterCallCount();
        em.persist(e);
        em.getTransaction().commit();
        Long id = e.getId();
        int callsAfterFlush = e.getGetterCallCount();
        em.close();

        System.out.println("RESULT[mixed-access]: getComputedLabel() call count before persist=" + callsBeforePersist
                + ", after commit/flush=" + callsAfterFlush
                + " (PROPERTY-access attributes are read via the getter at flush time, not via a backing field)");
        assertThat(callsAfterFlush).isGreaterThan(callsBeforePersist);

        EntityManager em2 = emf.createEntityManager();
        Object storedLabel = em2.createNativeQuery(
                "select computed_label from mixed_access_entity where id = " + id).getSingleResult();
        em2.close();
        System.out.println("RESULT[mixed-access]: DB column computed_label = " + storedLabel);
        assertThat(storedLabel).isEqualTo("WIDGET");
    }
}