/*
    * Copyright 2018 the original author or authors.
    *
    *  Licensed 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.openehealth.ipf.commons.ihe.fhir.support.translation;
  
  import org.hl7.fhir.dstu3.model.NamingSystem;
  import org.openehealth.ipf.commons.ihe.fhir.support.NamingSystemService;
  import org.openehealth.ipf.commons.ihe.fhir.translation.AbstractUriMapper;
  
  import java.util.Optional;
  
  import static org.hl7.fhir.dstu3.model.NamingSystem.NamingSystemIdentifierType.*;
  
  
  /**
   * URI Mapper that is backed by a {@link NamingSystemService}. The mapping is done
   * by search for a {@link NamingSystem}
   * with a uniqueID of a certain type and returning a unique ID with a different type.
   *
   * @author Christian Ohr
   * @since 3.4
   *
   */
  public class NamingSystemUriMapper extends AbstractUriMapper {
  
      private final NamingSystemService namingSystemService;
      private final String mappingId;
  
      public NamingSystemUriMapper(NamingSystemService namingSystemService, String mappingId) {
          this.namingSystemService = namingSystemService;
          this.mappingId = mappingId;
      }
  
      @Override
      protected Optional<String> mapOidToUri(String oid) {
          return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, OID, oid)
                  .map(NamingSystemService.getValueOfType(URI));
      }
  
      @Override
      protected Optional<String> mapUriToOid(String uri) {
          return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, URI, uri)
                  .map(NamingSystemService.getValueOfType(OID));
      }
  
      @Override
      protected Optional<String> mapUriToNamespace(String uri) {
          return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, URI, uri)
                  .map(NamingSystemService.getValueOfType(OTHER));
      }
  
      @Override
      protected Optional<String> mapNamespaceToUri(String namespace) {
          return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, OTHER, namespace)
                  .map(NamingSystemService.getValueOfType(URI));
      }
  }