/*
    * Copyright 2009 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.xds.core.validate;
  
  import ca.uhn.hl7v2.model.v25.datatype.HD;
  import ca.uhn.hl7v2.model.v25.datatype.XCN;
  import org.openehealth.ipf.commons.ihe.xds.core.metadata.Hl7v2Based;
  import org.openehealth.ipf.commons.ihe.xds.core.metadata.Person;
  
  import static org.apache.commons.lang3.StringUtils.isNotEmpty;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidationMessage.PERSON_MISSING_NAME_AND_ID;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidationMessage.PERSON_HD_MISSING;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.ValidatorAssertions.metaDataAssert;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.HL7ValidationUtils.isEmptyField;
  import static org.openehealth.ipf.commons.ihe.xds.core.validate.HL7ValidationUtils.isNotEmptyField;
  
  /**
   * Validates a XCN string.
   * @author Jens Riemschneider
   */
  public class XCNValidator implements ValueValidator {
      private static final HDValidator HD_VALIDATOR = new HDValidator();
  
      @Override
      public void validate(String hl7xcn) throws XDSMetaDataException {
          Person person = Hl7v2Based.parse(hl7xcn, Person.class);
          metaDataAssert(person != null, PERSON_MISSING_NAME_AND_ID, hl7xcn);
  
          XCN xcn = person.getHapiObject();
          metaDataAssert(
                  isNotEmpty(xcn.getXcn1_IDNumber().getValue()) ||
                  isNotEmpty(xcn.getXcn2_FamilyName().getFn1_Surname().getValue()),
                  PERSON_MISSING_NAME_AND_ID, hl7xcn);
  
  //        Spec actually allows the assigning authority to be missing:
  //          "If component 1 (ID Number) is specified, component 9 (Assigning Authority) shall be present if available"
          HD hd = xcn.getXcn9_AssigningAuthority();
          boolean condition = !isNotEmpty(xcn.getXcn1_IDNumber().getValue()) || isNotEmptyField(hd);
          metaDataAssert(condition, PERSON_HD_MISSING, hl7xcn);
  
          if (! isEmptyField(hd)) {
              HD_VALIDATOR.validate(hd, hl7xcn);
          }
      }
  }