/*
 * 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.
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package org.apache.accumulo.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.TreeSet;

import org.apache.accumulo.core.client.admin.TableOperations;
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.fs.FileSystem;
import org.apache.hadoop.fs.FsShell;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RawLocalFileSystem;
import org.apache.hadoop.io.Text;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.Iterables;

// ACCUMULO-3967
public class BulkImportSequentialRowsIT extends AccumuloClusterHarness {
  private static final Logger log = LoggerFactory.getLogger(BulkImportSequentialRowsIT.class);

  private static final long NR = 24;
  private static final long NV = 42000;

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

  @Override
  public void configureMiniCluster(MiniAccumuloConfigImpl cfg, Configuration hadoopCoreSite) {
    // Need more than one tserver
    cfg.setNumTservers(2);

    // use raw local file system so walogs sync and flush will work
    hadoopCoreSite.set("fs.file.impl", RawLocalFileSystem.class.getName());
  }

  @Test
  public void testBulkImportFailure() throws Exception {
    String tableName = getUniqueNames(1)[0];
    TableOperations to = getConnector().tableOperations();
    to.create(tableName);
    FileSystem fs = getFileSystem();
    Path rootPath = new Path(fs.makeQualified(getUsableDir()), getClass().getSimpleName());
    log.info("Writing to {}", rootPath);
    if (fs.exists(rootPath)) {
      assertTrue(fs.delete(rootPath, true));
    }
    assertTrue(fs.mkdirs(rootPath));

    Path bulk = new Path(rootPath, "bulk");
    log.info("bulk: {}", bulk);
    assertTrue(fs.mkdirs(bulk));
    Path err = new Path(rootPath, "err");
    log.info("err: {}", err);

    assertTrue(fs.mkdirs(bulk));
    assertTrue(fs.mkdirs(err));

    Path rfile = new Path(bulk, "file.rf");

    log.info("Generating RFile {}", rfile.toUri().toString());

    GenerateSequentialRFile.main(new String[] {"-f", rfile.toUri().toString(), "-nr", Long.toString(NR), "-nv", Long.toString(NV)});

    assertTrue("Expected that " + rfile + " exists, but it does not", fs.exists(rfile));

    FsShell fsShell = new FsShell(fs.getConf());
    assertEquals("Failed to chmod " + rootPath, 0, fsShell.run(new String[] {"-chmod", "-R", "777", rootPath.toString()}));

    // Add some splits
    to.addSplits(tableName, getSplits());

    // Then import a single rfile to all the tablets, hoping that we get a failure to import because of the balancer moving tablets around
    // and then we get to verify that the bug is actually fixed.
    to.importDirectory(tableName, bulk.toString(), err.toString(), false);

    // The bug is that some tablets don't get imported into.
    assertEquals(NR * NV, Iterables.size(getConnector().createScanner(tableName, Authorizations.EMPTY)));
  }

  private TreeSet<Text> getSplits() {
    TreeSet<Text> splits = new TreeSet<>();
    for (int i = 0; i < NR; i++) {
      splits.add(new Text(String.format("%03d", i)));
    }
    return splits;
  }
}