/*
 * Copyright 2018 Confluent Inc.
 *
 * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations under the License.
 */

package io.confluent.ksql.util.timestamp;

import io.confluent.ksql.GenericRow;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.streams.processor.TimestampExtractor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class LongTimestampExtractor implements TimestampExtractor {

  private static final Logger log = LoggerFactory.getLogger(LongTimestampExtractor.class);
  private final int timestampColumnindex;

  LongTimestampExtractor(final int timestampColumnindex) {
    this.timestampColumnindex = timestampColumnindex;
  }

  @Override
  public long extract(final ConsumerRecord<Object, Object> consumerRecord, final long l) {
    if (timestampColumnindex < 0) {
      return 0;
    } else {
      try {
        if (consumerRecord.value() instanceof GenericRow) {
          final GenericRow genericRow = (GenericRow) consumerRecord.value();
          if (genericRow.getColumns().get(timestampColumnindex) instanceof Long) {
            return (long) genericRow.getColumns().get(timestampColumnindex);
          }
        }
      } catch (final Exception e) {
        log.error("Exception in extracting timestamp for row: " + consumerRecord.value(), e);
      }
    }
    return 0;
  }
}
