/*
    * 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;
  
  import ca.uhn.fhir.context.FhirContext;
  import org.hl7.fhir.dstu3.model.Bundle;
  import org.hl7.fhir.dstu3.model.NamingSystem;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.Reader;
  import java.net.URL;
  
  /**
   * Default Implementation of a NamingSystem that loads and parses a Bundle of NamingSystem
   * resources using a Reader or from a FHIR server.
   *
   * @author Christian Ohr
   * @since 3.4
   */
  public class DefaultNamingSystemServiceImpl extends AbstractNamingSystemServiceImpl {
  
      private FhirContext fhirContext;
  
      public DefaultNamingSystemServiceImpl(FhirContext fhirContext) {
          super();
          this.fhirContext = fhirContext;
      }
  
      public DefaultNamingSystemServiceImpl addNamingSystemsFromXml(Reader reader) {
          addNamingSystems(fhirContext.newXmlParser().parseResource(Bundle.class, reader));
          return this;
      }
  
      public void setNamingSystemsFromXml(URL... urls) throws IOException {
          for (URL url : urls) {
              addNamingSystemsFromXml(new BufferedReader(new InputStreamReader(url.openStream())));
          }
      }
  
      public DefaultNamingSystemServiceImpl addNamingSystemsFromJson(Reader reader) {
          addNamingSystems(fhirContext.newJsonParser().parseResource(Bundle.class, reader));
          return this;
      }
  
      public void setNamingSystemsFromJson(URL... urls) throws IOException {
          for (URL url : urls) {
              addNamingSystemsFromJson(new BufferedReader(new InputStreamReader(url.openStream())));
          }
      }
  
      public DefaultNamingSystemServiceImpl addNamingSystemsFromFhirServer(String url) {
          addNamingSystems(fhirContext.newRestfulGenericClient(url)
                  .search()
                  .forResource(NamingSystem.class)
                  .returnBundle(Bundle.class)
                  .execute());
          return this;
      }
  
  }