/*
    * 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.
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  package org.apache.syncope.fit.core.reference;
  
  import java.util.Optional;
  import org.apache.syncope.common.lib.to.Provision;
  import org.apache.syncope.common.lib.types.MatchType;
  import org.apache.syncope.core.persistence.api.dao.UserDAO;
  import org.apache.syncope.core.persistence.api.dao.search.AttrCond;
  import org.apache.syncope.core.persistence.api.dao.search.SearchCond;
  import org.apache.syncope.core.persistence.api.entity.Any;
  import org.apache.syncope.core.provisioning.api.rules.PullCorrelationRule;
  import org.apache.syncope.core.provisioning.api.rules.PullCorrelationRuleConfClass;
  import org.apache.syncope.core.provisioning.api.rules.PullMatch;
  import org.identityconnectors.framework.common.objects.Attribute;
  import org.identityconnectors.framework.common.objects.SyncDelta;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.transaction.annotation.Transactional;
  import org.springframework.util.CollectionUtils;
  
  @PullCorrelationRuleConfClass(LinkedAccountSamplePullCorrelationRuleConf.class)
  public class LinkedAccountSamplePullCorrelationRule implements PullCorrelationRule {
  
      public static final String VIVALDI_KEY = "b3cbc78d-32e6-4bd4-92e0-bbe07566a2ee";
  
      @Autowired
      private UserDAO userDAO;
  
      @Override
      public SearchCond getSearchCond(final SyncDelta syncDelta, final Provision provision) {
          AttrCond cond = new AttrCond();
  
          Attribute email = syncDelta.getObject().getAttributeByName("email");
          if (email != null && !CollectionUtils.isEmpty(email.getValue())) {
              cond.setSchema("email");
              cond.setType(AttrCond.Type.EQ);
              cond.setExpression(email.getValue().get(0).toString());
          } else {
              cond.setSchema("");
          }
  
          return SearchCond.getLeaf(cond);
      }
  
      @Transactional(readOnly = true)
      @Override
      public PullMatch matching(final Any<?> any, final SyncDelta syncDelta, final Provision provision) {
          // if match with internal user vivaldi was found but firstName is different, update linked account
          // instead of updating user
          Attribute firstName = syncDelta.getObject().getAttributeByName("firstName");
          if (VIVALDI_KEY.equals(any.getKey())
                  && firstName != null && !CollectionUtils.isEmpty(firstName.getValue())
                  && !"Antonio".equals(firstName.getValue().get(0).toString())) {
  
              return new PullMatch(MatchType.LINKED_ACCOUNT, any);
          }
  
          return PullCorrelationRule.super.matching(any, syncDelta, provision);
      }
  
      @Transactional(readOnly = true)
      @Override
      public Optional<PullMatch> unmatching(final SyncDelta syncDelta, final Provision provision) {
          // if no match with internal user was found, link account to vivaldi instead of creating new user
          return Optional.of(new PullMatch(MatchType.LINKED_ACCOUNT, userDAO.find(VIVALDI_KEY)));
      }
  }