/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2014 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.caravan.pipeline.impl;
  
  import io.wcm.caravan.io.http.request.CaravanHttpRequest;
  import io.wcm.caravan.pipeline.JsonPipelineOutput;
  
  import java.util.Iterator;
  import java.util.List;
  
  import com.fasterxml.jackson.databind.JsonNode;
  
  /**
   * Implementation of JsonPipelineOutput
   */
  public class JsonPipelineOutputImpl implements JsonPipelineOutput {
  
    private final JsonPipelineMetadata metadata;
    private final JsonNode payload;
    private final List<CaravanHttpRequest> requests;
  
    /**
     * Creates pipeline output with the given payload
     * @param payload
     */
    public JsonPipelineOutputImpl(JsonNode payload, List<CaravanHttpRequest> requests) {
      this.metadata = new JsonPipelineMetadata(200);
      this.payload = payload;
      this.requests = requests;
    }
  
    JsonPipelineOutputImpl(JsonPipelineMetadata metadata, JsonNode payload, List<CaravanHttpRequest> requests) {
      this.metadata = metadata;
      this.payload = payload;
      this.requests = requests;
    }
  
    JsonPipelineOutputImpl deepCopy() {
      JsonPipelineOutputImpl copy = new JsonPipelineOutputImpl(payload, requests);
      copy.getMetadata().setMaxAge(getMaxAge());
      copy.getMetadata().setStatusCode(getStatusCode());
      return copy;
    }
  
    @Override
    public JsonNode getPayload() {
      return payload;
    }
  
    public JsonPipelineMetadata getMetadata() {
      return metadata;
    }
  
    @Override
    public JsonPipelineOutput withPayload(JsonNode newPayload) {
      return new JsonPipelineOutputImpl(metadata, newPayload, requests);
    }
  
    @Override
    public int getStatusCode() {
      return metadata.getStatusCode();
    }
  
    @Override
    public JsonPipelineOutput withStatusCode(int statusCode) {
      JsonPipelineOutputImpl copy = deepCopy();
      copy.getMetadata().setStatusCode(statusCode);
      return copy;
    }
  
    @Override
    public int getMaxAge() {
      return metadata.getMaxAge();
    }
  
    @Override
    public JsonPipelineOutput withMaxAge(int expirySeconds) {
      JsonPipelineOutputImpl copy = deepCopy();
      copy.getMetadata().setMaxAge(expirySeconds);
      return copy;
    }
  
   @Override
   public String getCorrelationId() {
     Iterator<CaravanHttpRequest> requestIterator = requests.iterator();
     while (requestIterator.hasNext()) {
       String correlationId = requestIterator.next().getCorrelationId();
       if (correlationId != null) {
         return correlationId;
       }
     }
     return null;
   }
 
   @Override
   public List<CaravanHttpRequest> getRequests() {
     return requests;
   }
 }