/*
 * 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
 *
 *     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.accumulo.test.functional;

import static org.apache.accumulo.test.functional.FunctionalTestUtils.checkRFiles;
import static org.apache.accumulo.test.functional.FunctionalTestUtils.nm;
import static org.junit.Assert.assertEquals;

import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.apache.accumulo.core.client.BatchWriter;
import org.apache.accumulo.core.client.BatchWriterConfig;
import org.apache.accumulo.core.client.Connector;
import org.apache.accumulo.core.client.IteratorSetting;
import org.apache.accumulo.core.client.Scanner;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.core.iterators.IteratorUtil.IteratorScope;
import org.apache.accumulo.core.iterators.user.RowDeletingIterator;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.harness.AccumuloClusterHarness;
import org.apache.accumulo.minicluster.impl.MiniAccumuloConfigImpl;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.junit.Test;

import com.google.common.collect.Iterators;

public class RowDeleteIT extends AccumuloClusterHarness {

  @Override
  public void configureMiniCluster(MiniAccumuloConfigImpl cfg, Configuration hadoopCoreSite) {
    Map<String,String> siteConfig = cfg.getSiteConfig();
    siteConfig.put(Property.TSERV_MAJC_DELAY.getKey(), "50ms");
    cfg.setSiteConfig(siteConfig);
  }

  @Override
  protected int defaultTimeoutSeconds() {
    return 60;
  }

  @Test
  public void run() throws Exception {
    Connector c = getConnector();
    String tableName = getUniqueNames(1)[0];
    c.tableOperations().create(tableName);
    Map<String,Set<Text>> groups = new HashMap<>();
    groups.put("lg1", Collections.singleton(new Text("foo")));
    groups.put("dg", Collections.<Text> emptySet());
    c.tableOperations().setLocalityGroups(tableName, groups);
    IteratorSetting setting = new IteratorSetting(30, RowDeletingIterator.class);
    c.tableOperations().attachIterator(tableName, setting, EnumSet.of(IteratorScope.majc));
    c.tableOperations().setProperty(tableName, Property.TABLE_MAJC_RATIO.getKey(), "100");

    BatchWriter bw = c.createBatchWriter(tableName, new BatchWriterConfig());

    bw.addMutation(nm("r1", "foo", "cf1", "v1"));
    bw.addMutation(nm("r1", "bar", "cf1", "v2"));

    bw.flush();
    c.tableOperations().flush(tableName, null, null, true);

    checkRFiles(c, tableName, 1, 1, 1, 1);

    Scanner scanner = c.createScanner(tableName, Authorizations.EMPTY);
    int count = Iterators.size(scanner.iterator());
    assertEquals("count == " + count, 2, count);

    bw.addMutation(nm("r1", "", "", RowDeletingIterator.DELETE_ROW_VALUE));

    bw.flush();
    c.tableOperations().flush(tableName, null, null, true);

    checkRFiles(c, tableName, 1, 1, 2, 2);

    scanner = c.createScanner(tableName, Authorizations.EMPTY);
    count = Iterators.size(scanner.iterator());
    assertEquals("count == " + count, 3, count);

    c.tableOperations().compact(tableName, null, null, false, true);

    checkRFiles(c, tableName, 1, 1, 0, 0);

    scanner = c.createScanner(tableName, Authorizations.EMPTY);
    count = Iterators.size(scanner.iterator());
    assertEquals("count == " + count, 0, count);
    bw.close();

  }

}