/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 *
 *   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.apache.streams.rss.processor;

import org.apache.streams.core.StreamsDatum;
import org.apache.streams.core.StreamsProcessor;
import org.apache.streams.pojo.json.Activity;
import org.apache.streams.rss.serializer.SyndEntryActivitySerializer;

import com.fasterxml.jackson.databind.node.ObjectNode;
import org.apache.commons.lang.NotImplementedException;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.LinkedList;
import java.util.List;

/**
 * Converts ObjectNode representations of Rome SyndEntries to activities.
 */
public class RssTypeConverter implements StreamsProcessor {

  public static final String STREAMS_ID = "RssTypeConverter";

  private static final Logger LOGGER = LoggerFactory.getLogger(RssTypeConverter.class);

  private SyndEntryActivitySerializer serializer;
  private int successCount = 0;
  private int failCount = 0;

  @Override
  public String getId() {
    return STREAMS_ID;
  }

  @Override
  public List<StreamsDatum> process(StreamsDatum datum) {
    List<StreamsDatum> datums = new LinkedList<>();
    if (datum.getDocument() instanceof ObjectNode) {
      Activity activity = this.serializer.deserialize((ObjectNode) datum.getDocument());
      datums.add(new StreamsDatum(activity, activity.getId(), DateTime.now().withZone(DateTimeZone.UTC)));
      successCount ++;
    } else {
      failCount ++;
      throw new NotImplementedException("Not implemented for class type : " + datum.getDocument().getClass().toString());

    }
    LOGGER.debug("Processor current success count: {} and current fail: {}", successCount, failCount);

    return datums;
  }

  @Override
  public void prepare(Object configurationObject) {
    this.serializer = new SyndEntryActivitySerializer();
  }

  @Override
  public void cleanUp() {

  }
}
