package com.megatim.apifdxweb.dao.impl.administration;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import com.bekosoftware.genericdaolayer.dao.impl.AbstractGenericDAO;
import com.bekosoftware.genericdaolayer.dao.tools.RestrictionsContainer;
import com.google.common.hash.HashCode;
import com.google.common.hash.Hashing;
import com.megatim.apifdxweb.dao.ifaces.administration.UserDAO;
import com.megatim.apifdxweb.model.administration.User;
import com.megatim.fdxcommons.model.enumeration.TypeOperation;
import java.nio.charset.StandardCharsets;
import java.util.List;
import javax.enterprise.context.Dependent;
import javax.transaction.Transactional;

@Dependent
public class UserDAOImpl extends AbstractGenericDAO<User, Long> implements UserDAO {

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

    public UserDAOImpl() {
    }

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

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

    @Override
    public User recuperUtilisateur(String username, String motDePasse) {

        RestrictionsContainer requeteur = RestrictionsContainer.newInstance();
        requeteur.addEq("userName", username);
        requeteur.addEq("typeOperation", TypeOperation.AJOUTER);
        requeteur.addEq("locked", false);

        List<User> resultats = filter(requeteur.getPredicats(), null, null, 0, 1);
        if (resultats == null || resultats.isEmpty()) {
            return null;
        }
        
        User user;
        //On verifie si le mot de passe est correct
        HashCode hashCode = Hashing.sha256().hashString(motDePasse, StandardCharsets.UTF_8);
        if (!hashCode.toString().equals(resultats.get(0).getPwd())) {
            user = null;
        } else {
            user = resultats.get(0);
        }

        return user;
    }

    @Transactional
    @Override
    public User recuperUtilisateur(String username) {
        List<User> liste = em.createQuery("SELECT u FROM User u "
                + "WHERE u.userName = :userName AND u.typeOperation = :typeOperation AND u.locked = :locked")
                .setParameter("userName", username)
                .setParameter("typeOperation", TypeOperation.AJOUTER)
                .setParameter("locked", false)
                .getResultList();
        return liste != null && !liste.isEmpty() ? liste.stream().findFirst().get() : null;
    }

    @Override
    public User getUser(String username) {
        List<User> liste = em.createQuery("SELECT u FROM User u "
                + "WHERE u.userName = :userName AND u.typeOperation = :typeOperation")
                .setParameter("userName", username)
                .setParameter("typeOperation", TypeOperation.AJOUTER)
                .getResultList();
        return liste != null && !liste.isEmpty() ? liste.stream().findFirst().get() : null;
    }

}