/*
    * 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 javax.persistence.TypedQuery;
  import org.apache.syncope.core.persistence.api.dao.ApplicationDAO;
  import org.apache.syncope.core.persistence.api.dao.RoleDAO;
  import org.apache.syncope.core.persistence.api.dao.UserDAO;
  import org.apache.syncope.core.persistence.api.entity.Application;
  import org.apache.syncope.core.persistence.api.entity.Privilege;
  import org.apache.syncope.core.persistence.jpa.entity.JPAApplication;
  import org.apache.syncope.core.persistence.jpa.entity.JPAPrivilege;
  
  public class JPAApplicationDAO extends AbstractDAO<Application> implements ApplicationDAO {
  
      protected final RoleDAO roleDAO;
  
      protected final UserDAO userDAO;
  
      public JPAApplicationDAO(final RoleDAO roleDAO, final UserDAO userDAO) {
          this.roleDAO = roleDAO;
          this.userDAO = userDAO;
      }
  
      @Override
      public Application find(final String key) {
          return entityManager().find(JPAApplication.class, key);
      }
  
      @Override
      public Privilege findPrivilege(final String key) {
          return entityManager().find(JPAPrivilege.class, key);
      }
  
      @Override
      public List<Application> findAll() {
          TypedQuery<Application> query = entityManager().createQuery(
                  "SELECT e FROM " + JPAApplication.class.getSimpleName() + " e ", Application.class);
          return query.getResultList();
      }
  
      @Override
      public Application save(final Application application) {
          return entityManager().merge(application);
      }
  
      @Override
      public void delete(final Application application) {
          application.getPrivileges().forEach(privilege -> {
              roleDAO.findByPrivilege(privilege).
                      forEach(role -> role.getPrivileges().remove(privilege));
              userDAO.findLinkedAccountsByPrivilege(privilege).
                      forEach(account -> account.getPrivileges().remove(privilege));
  
              privilege.setApplication(null);
          });
          application.getPrivileges().clear();
  
          entityManager().remove(application);
      }
  
      @Override
      public void delete(final String key) {
          Application application = find(key);
          if (application == null) {
              return;
          }
  
          delete(application);
      }
  }