/**
 * Copyright (C) 2014 Stratio (http://stratio.com)
 *
 * 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 com.stratio.ingestion.sink.elasticsearch;

import com.google.common.collect.Maps;
import org.apache.flume.event.SimpleEvent;
import org.joda.time.DateTimeUtils;
import org.junit.Before;
import org.junit.Test;

import java.util.Map;

import static org.junit.Assert.*;

public class TimestampedEventTest {
  static final long FIXED_TIME_MILLIS = 123456789L;

  @Before
  public void setFixedJodaTime() {
    DateTimeUtils.setCurrentMillisFixed(FIXED_TIME_MILLIS);
  }

  @Test
  public void shouldEnsureTimestampHeaderPresentInTimestampedEvent() {
    SimpleEvent base = new SimpleEvent();

    TimestampedEvent timestampedEvent = new TimestampedEvent(base);
    assertEquals(FIXED_TIME_MILLIS, timestampedEvent.getTimestamp());
    assertEquals(String.valueOf(FIXED_TIME_MILLIS),
            timestampedEvent.getHeaders().get("timestamp"));
  }

  @Test
  public void shouldUseExistingTimestampHeaderInTimestampedEvent() {
    SimpleEvent base = new SimpleEvent();
    Map<String, String> headersWithTimestamp = Maps.newHashMap();
    headersWithTimestamp.put("timestamp", "-321");
    base.setHeaders(headersWithTimestamp );

    TimestampedEvent timestampedEvent = new TimestampedEvent(base);
    assertEquals(-321L, timestampedEvent.getTimestamp());
    assertEquals("-321", timestampedEvent.getHeaders().get("timestamp"));
  }

  @Test
  public void shouldUseExistingAtTimestampHeaderInTimestampedEvent() {
    SimpleEvent base = new SimpleEvent();
    Map<String, String> headersWithTimestamp = Maps.newHashMap();
    headersWithTimestamp.put("@timestamp", "-999");
    base.setHeaders(headersWithTimestamp );

    TimestampedEvent timestampedEvent = new TimestampedEvent(base);
    assertEquals(-999L, timestampedEvent.getTimestamp());
    assertEquals("-999", timestampedEvent.getHeaders().get("@timestamp"));
    assertNull(timestampedEvent.getHeaders().get("timestamp"));
  }

  @Test
  public void shouldPreserveBodyAndNonTimestampHeadersInTimestampedEvent() {
    SimpleEvent base = new SimpleEvent();
    base.setBody(new byte[] {1,2,3,4});
    Map<String, String> headersWithTimestamp = Maps.newHashMap();
    headersWithTimestamp.put("foo", "bar");
    base.setHeaders(headersWithTimestamp );

    TimestampedEvent timestampedEvent = new TimestampedEvent(base);
    assertEquals("bar", timestampedEvent.getHeaders().get("foo"));
    assertArrayEquals(base.getBody(), timestampedEvent.getBody());
  }
}
