/**
 * 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
 * with the License.  You may obtain a copy of the License at
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.discovery;

import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.replay;

import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetricMetadata;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetrics;
import org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.AbstractMiniHBaseClusterTest;
import org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.TimelineMetricConfiguration;
import org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.TimelineMetricsFilter;
import org.easymock.EasyMock;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.net.URISyntaxException;
import java.sql.SQLException;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

public class TestMetadataManager extends AbstractMiniHBaseClusterTest {
  TimelineMetricMetadataManager metadataManager;

  @Before
  public void insertDummyRecords() throws IOException, SQLException, URISyntaxException {
    // Initialize new manager
    metadataManager = new TimelineMetricMetadataManager(new Configuration(), hdb);
    final long now = System.currentTimeMillis();

    TimelineMetrics timelineMetrics = new TimelineMetrics();
    TimelineMetric metric1 = new TimelineMetric();
    metric1.setMetricName("dummy_metric1");
    metric1.setHostName("dummy_host1");
    metric1.setTimestamp(now);
    metric1.setStartTime(now - 1000);
    metric1.setAppId("dummy_app1");
    metric1.setType("Integer");
    metric1.setMetricValues(new TreeMap<Long, Double>() {{
      put(now - 100, 1.0);
      put(now - 200, 2.0);
      put(now - 300, 3.0);
    }});
    timelineMetrics.getMetrics().add(metric1);
    TimelineMetric metric2 = new TimelineMetric();
    metric2.setMetricName("dummy_metric2");
    metric2.setHostName("dummy_host2");
    metric2.setTimestamp(now);
    metric2.setStartTime(now - 1000);
    metric2.setAppId("dummy_app2");
    metric2.setType("Integer");
    metric2.setInstanceId("instance2");
    metric2.setMetricValues(new TreeMap<Long, Double>() {{
      put(now - 100, 1.0);
      put(now - 200, 2.0);
      put(now - 300, 3.0);
    }});
    timelineMetrics.getMetrics().add(metric2);


    //Test whitelisting
    TimelineMetric metric3 = new TimelineMetric();
    metric3.setMetricName("dummy_metric3");
    metric3.setHostName("dummy_host3");
    metric3.setTimestamp(now);
    metric3.setStartTime(now - 1000);
    metric3.setAppId("dummy_app3");
    metric3.setType("Integer");
    metric3.setMetricValues(new TreeMap<Long, Double>() {{
      put(now - 100, 1.0);
      put(now - 200, 2.0);
      put(now - 300, 3.0);
    }});
    timelineMetrics.getMetrics().add(metric3);

    Configuration metricsConf = new Configuration();
    TimelineMetricConfiguration configuration = EasyMock.createNiceMock(TimelineMetricConfiguration.class);
    expect(configuration.getMetricsConf()).andReturn(metricsConf).once();
    replay(configuration);
    TimelineMetricsFilter.initializeMetricFilter(configuration);
    TimelineMetricsFilter.addToWhitelist("dummy_metric1");
    TimelineMetricsFilter.addToWhitelist("dummy_metric2");

    hdb.insertMetricRecordsWithMetadata(metadataManager, timelineMetrics, true);
  }

  @Test(timeout = 180000)
  public void testSaveMetricsMetadata() throws Exception {
    Map<TimelineMetricMetadataKey, TimelineMetricMetadata> cachedData = metadataManager.getMetadataCache();

    Assert.assertNotNull(cachedData);
    Assert.assertEquals(3, cachedData.size());
    TimelineMetricMetadataKey key1 = new TimelineMetricMetadataKey("dummy_metric1", "dummy_app1");
    TimelineMetricMetadataKey key2 = new TimelineMetricMetadataKey("dummy_metric2", "dummy_app2");
    TimelineMetricMetadataKey key3 = new TimelineMetricMetadataKey("dummy_metric3", "dummy_app3");
    TimelineMetricMetadata value1 = new TimelineMetricMetadata("dummy_metric1",
      "dummy_app1", "Integer", null, 1L, true, false);
    TimelineMetricMetadata value2 = new TimelineMetricMetadata("dummy_metric2",
      "dummy_app2", "Integer", null, 1L, true, false);
    TimelineMetricMetadata value3 = new TimelineMetricMetadata("dummy_metric3",
      "dummy_app3", "Integer", null, 1L, true, true);

    Assert.assertEquals(value1, cachedData.get(key1));
    Assert.assertEquals(value2, cachedData.get(key2));
    Assert.assertEquals(value3, cachedData.get(key3));

    TimelineMetricMetadataSync syncRunnable = new TimelineMetricMetadataSync(metadataManager);
    syncRunnable.run();

    Map<TimelineMetricMetadataKey, TimelineMetricMetadata> savedData =
      hdb.getTimelineMetricMetadata();

    Assert.assertNotNull(savedData);
    Assert.assertEquals(3, savedData.size());
    Assert.assertEquals(value1, savedData.get(key1));
    Assert.assertEquals(value2, savedData.get(key2));
    Assert.assertEquals(value3, savedData.get(key3));

    Map<String, Set<String>> cachedHostData = metadataManager.getHostedAppsCache();
    Map<String, Set<String>> savedHostData = metadataManager.getHostedAppsFromStore();
    Assert.assertEquals(cachedData.size(), savedData.size());
    Assert.assertEquals("dummy_app1", cachedHostData.get("dummy_host1").iterator().next());
    Assert.assertEquals("dummy_app2", cachedHostData.get("dummy_host2").iterator().next());
    Assert.assertEquals("dummy_app3", cachedHostData.get("dummy_host3").iterator().next());
    Assert.assertEquals("dummy_app1", savedHostData.get("dummy_host1").iterator().next());
    Assert.assertEquals("dummy_app2", savedHostData.get("dummy_host2").iterator().next());
    Assert.assertEquals("dummy_app3", cachedHostData.get("dummy_host3").iterator().next());


    Map<String, Set<String>> cachedHostInstanceData = metadataManager.getHostedInstanceCache();
    Map<String, Set<String>> savedHostInstanceData = metadataManager.getHostedInstancesFromStore();
    Assert.assertEquals(cachedHostInstanceData.size(), savedHostInstanceData.size());
    Assert.assertEquals("dummy_host2", cachedHostInstanceData.get("instance2").iterator().next());

  }
}