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 java.util.Map;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

/**
 * Does {@code @JdbcTypeCode(SqlTypes.JSON)} actually work against H2 2.4.240? Honest empirical
 * check -- if H2 rejects it, this test says so instead of asserting success.
 *
 * <p>Docs: docs/05-jpa-persistence-annotations.md, Topic 2.
 */
@SpringBootTest(classes = HibernateDemoApplication.class)
class JsonColumnOnH2Test {

    @Autowired
    private EntityManagerFactory emf;

    @Test
    void jdbcTypeCodeJson_onH2_roundTripsAMap() {
        EntityManager em = emf.createEntityManager();
        em.getTransaction().begin();
        JsonColumnEntity e = new JsonColumnEntity(Map.of("color", "red", "qty", 5));
        em.persist(e);
        em.getTransaction().commit();
        Long id = e.getId();
        em.close();

        EntityManager em2 = emf.createEntityManager();
        JsonColumnEntity loaded = em2.find(JsonColumnEntity.class, id);
        em2.close();

        System.out.println("RESULT[jdbctypecode-json-h2]: persisted+loaded details=" + loaded.getDetails());
        assertThat(loaded.getDetails()).containsEntry("color", "red");

        // Inspect the actual column type H2 chose for it.
        EntityManager em3 = emf.createEntityManager();
        Object colType = em3.createNativeQuery(
                "select data_type from information_schema.columns "
                        + "where table_name = 'JSON_COLUMN_ENTITY' and column_name = 'DETAILS'")
                .getSingleResult();
        em3.close();
        System.out.println("RESULT[jdbctypecode-json-h2]: H2 column type for the JSON field = " + colType);
    }
}