/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.syncope.core.persistence.jpa.dao;
  
  import java.util.List;
  import java.util.Optional;
  import javax.persistence.Query;
  import javax.persistence.TypedQuery;
  import org.apache.syncope.core.persistence.api.dao.AuthProfileDAO;
  import org.apache.syncope.core.persistence.api.entity.am.AuthProfile;
  import org.apache.syncope.core.persistence.jpa.entity.am.JPAAuthProfile;
  
  public class JPAAuthProfileDAO extends AbstractDAO<AuthProfile> implements AuthProfileDAO {
  
      @Override
      public AuthProfile find(final String key) {
          return entityManager().find(JPAAuthProfile.class, key);
      }
  
      @Override
      public int count() {
          Query query = entityManager().createQuery(
                  "SELECT COUNT(e) FROM  " + JPAAuthProfile.class.getSimpleName() + " e");
          return ((Number) query.getSingleResult()).intValue();
      }
  
      @Override
      public List<AuthProfile> findAll(final int page, final int itemsPerPage) {
          TypedQuery<AuthProfile> query = entityManager().createQuery(
                  "SELECT e FROM " + JPAAuthProfile.class.getSimpleName() + " e ORDER BY e.owner ASC",
                  AuthProfile.class);
  
          // page starts from 1, while setFirtResult() starts from 0
          query.setFirstResult(itemsPerPage * (page <= 0 ? 0 : page - 1));
  
          if (itemsPerPage >= 0) {
              query.setMaxResults(itemsPerPage);
          }
  
          return query.getResultList();
      }
  
      @Override
      public Optional<AuthProfile> findByOwner(final String owner) {
          TypedQuery<AuthProfile> query = entityManager().createQuery(
                  "SELECT e FROM " + JPAAuthProfile.class.getSimpleName()
                  + " e WHERE e.owner=:owner", AuthProfile.class);
          query.setParameter("owner", owner);
  
          List<AuthProfile> result = query.getResultList();
          return result.isEmpty() ? Optional.empty() : Optional.of(result.get(0));
      }
  
      @Override
      public AuthProfile save(final AuthProfile profile) {
          return entityManager().merge(profile);
      }
  
      @Override
      public void delete(final String key) {
          AuthProfile authProfile = find(key);
          if (authProfile == null) {
              return;
          }
          delete(authProfile);
      }
  
      @Override
      public void delete(final AuthProfile authProfile) {
          entityManager().remove(authProfile);
      }
  }