/*
    * Copyright 2014 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.platform.camel.hl7.adapter;
  
  import ca.uhn.hl7v2.AcknowledgmentCode;
  import ca.uhn.hl7v2.ErrorCode;
  import ca.uhn.hl7v2.HL7Exception;
  import ca.uhn.hl7v2.model.Message;
  import org.apache.camel.util.ObjectHelper;
  
  /**
   *
   */
  public class AcknowledgementAdapter extends HapiAdapter {
  
      @Override
      protected Message doProcessMessage(Message message, Throwable t, Object... inputParams) {
          AcknowledgmentCode acknowledgementCode = inputParams != null && inputParams.length > 0 ?
                  (AcknowledgmentCode) inputParams[0] :
                  AcknowledgmentCode.AA;
          String errorMessage = inputParams != null && inputParams.length > 1 ?
                  inputParams[1].toString() :
                  "Error while processing HL7 message";
          ErrorCode errorCode = inputParams != null && inputParams.length > 2 ?
                  (ErrorCode) inputParams[2] :
                  ErrorCode.APPLICATION_INTERNAL_ERROR;
          try {
              HL7Exception hl7e = generateHL7Exception(t, acknowledgementCode, errorMessage, errorCode);
              if (t != null && acknowledgementCode == null) {
                  acknowledgementCode = AcknowledgmentCode.AE;
              }
              return message.generateACK(acknowledgementCode == null ? AcknowledgmentCode.AA : acknowledgementCode, hl7e);
          } catch (Exception e) {
              throw ObjectHelper.wrapRuntimeCamelException(e);
          }
  
      }
  
      private HL7Exception generateHL7Exception(Throwable t, AcknowledgmentCode acknowledgementCode, String errorMessage, ErrorCode errorCode) {
          if (t == null) {
              if (acknowledgementCode != null && !acknowledgementCode.name().endsWith("A")) {
                  return new HL7Exception(errorMessage, errorCode);
              } else {
                  return null;
              }
          }
          return t instanceof HL7Exception ?
                  (HL7Exception) t :
                  new HL7Exception(errorMessage != null ? errorMessage : t.getMessage(), errorCode, t);
      }
  
  }