/*
    * 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.Set;
  import java.util.stream.Collectors;
  import javax.persistence.TypedQuery;
  import org.apache.syncope.common.lib.types.IdMEntitlement;
  import org.apache.syncope.core.persistence.api.dao.ConnInstanceDAO;
  import org.apache.syncope.core.persistence.api.dao.ExternalResourceDAO;
  import org.apache.syncope.core.persistence.api.entity.ConnInstance;
  import org.apache.syncope.core.persistence.api.entity.ExternalResource;
  import org.apache.syncope.core.persistence.jpa.entity.JPAConnInstance;
  import org.apache.syncope.core.spring.security.AuthContextUtils;
  import org.apache.syncope.core.spring.security.DelegatedAdministrationException;
  import org.springframework.transaction.annotation.Transactional;
  
  public class JPAConnInstanceDAO extends AbstractDAO<ConnInstance> implements ConnInstanceDAO {
  
      protected final ExternalResourceDAO resourceDAO;
  
      public JPAConnInstanceDAO(final ExternalResourceDAO resourceDAO) {
          this.resourceDAO = resourceDAO;
      }
  
      @Transactional(readOnly = true)
      @Override
      public ConnInstance find(final String key) {
          return entityManager().find(JPAConnInstance.class, key);
      }
  
      @Transactional(readOnly = true)
      @Override
      public ConnInstance authFind(final String key) {
          ConnInstance connInstance = find(key);
          if (connInstance == null) {
              return null;
          }
  
          Set<String> authRealms = AuthContextUtils.getAuthorizations().get(IdMEntitlement.CONNECTOR_READ);
          if (authRealms == null || authRealms.isEmpty()
                  || !authRealms.stream().anyMatch(
                          realm -> connInstance.getAdminRealm().getFullPath().startsWith(realm))) {
  
              throw new DelegatedAdministrationException(
                      connInstance.getAdminRealm().getFullPath(),
                      ConnInstance.class.getSimpleName(),
                      connInstance.getKey());
          }
  
          return connInstance;
      }
  
      @Override
      public List<ConnInstance> findAll() {
          final Set<String> authRealms = AuthContextUtils.getAuthorizations().get(IdMEntitlement.CONNECTOR_LIST);
          if (authRealms == null || authRealms.isEmpty()) {
              return List.of();
          }
  
          TypedQuery<ConnInstance> query = entityManager().createQuery(
                  "SELECT e FROM " + JPAConnInstance.class.getSimpleName() + " e", ConnInstance.class);
  
          return query.getResultList().stream().filter(connInstance -> authRealms.stream().
                  anyMatch(realm -> connInstance.getAdminRealm().getFullPath().startsWith(realm))).
                  collect(Collectors.toList());
      }
  
      @Override
      public ConnInstance save(final ConnInstance connector) {
          ((JPAConnInstance) connector).list2json();
          return entityManager().merge(connector);
      }
  
      @Override
      public void delete(final String key) {
          ConnInstance connInstance = find(key);
          if (connInstance == null) {
              return;
          }
  
          connInstance.getResources().stream().map(ExternalResource::getKey).collect(Collectors.toList()).
                 forEach(resourceDAO::delete);
 
         entityManager().remove(connInstance);
     }
 }