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package com.megatim.fdxconsultation.dao.impl.stats;

import com.megatim.fdxcommons.model.pojo.CriteriaEntity;
import com.megatim.fdxcommons.tools.database.tables.dto.JpqlQueryElement;
import com.megatim.fdxcommons.model.pojo.OrderByDefinition;
import com.megatim.fdxconsultation.dao.ifaces.stats.CriteriaEntityPersistedDAO;
import com.megatim.fdxconsultation.model.stats.CriteriaEntityPersisted;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

/**
 *
 * @author ASUS
 */
@Stateless
public class CriteriaEntityPersistedDAOImpl implements CriteriaEntityPersistedDAO {

    @PersistenceContext(unitName = "fdxConsultationPersistenceUnit")
    protected EntityManager em;

    @Override
    public Class<CriteriaEntityPersisted> getManagedEntityClass() {
        return CriteriaEntityPersisted.class;
    }

    @Override
    public EntityManager getEntityManager() {
        return em;
    }

    @Override
    public CriteriaEntityPersisted getById(Long id) {
        Query query = em.createQuery("SELECT c from CriteriaEntityPersisted "
                + "where c.id = :id ");
        query.setParameter("id", id);

        Optional<CriteriaEntityPersisted> optionalCriteria = query.getResultList().stream().findFirst();
        CriteriaEntityPersisted criterion = optionalCriteria.isPresent() ? optionalCriteria.get() : null;

        if (criterion == null) {
            return null;
        }

        return loadSubCriteria(criterion);
    }

    @Override
    public CriteriaEntityPersisted loadSubCriteria(CriteriaEntityPersisted criterion) {
        List<CriteriaEntityPersisted> children = getChildren(criterion.getId());

        List<CriteriaEntityPersisted> subCriteria = new ArrayList<>();

        for (CriteriaEntityPersisted c : children) {
            subCriteria.add(loadSubCriteria(c));
        }
        criterion.setSubCriterias(subCriteria);

        return criterion;
    }

    private List<CriteriaEntityPersisted> getChildren(Long id) {
        Query query = em.createQuery("SELECT c from CriteriaEntityPersisted c where c.parent.id = :id ");
        query.setParameter("id", id);

        return (List<CriteriaEntityPersisted>) query.getResultList();
    }

    @Override
    public List<CriteriaEntityPersisted> subCriterias(Long id) {
        Query query = em.createQuery("SELECT c FROM CriteriaEntityPersisted c WHERE c.parent.id = :id ");
        query.setParameter("id", id);
        return query.getResultList();
    }

}