/*
 * 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.hadoop.hbase.io.compress.zstd;

import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.io.compress.HFileTestBase;
import org.apache.hadoop.hbase.testclassification.IOTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;

@Tag(IOTests.TAG)
@Tag(SmallTests.TAG)
public class TestHFileCompressionZstd extends HFileTestBase {

  private static Configuration conf;

  @BeforeAll
  public static void setUpBeforeClass() throws Exception {
    HFileTestBase.setUpBeforeClass();
  }

  @BeforeEach
  public void setUp() throws Exception {
    conf = TEST_UTIL.getConfiguration();
    conf.set(Compression.ZSTD_CODEC_CLASS_KEY, ZstdCodec.class.getCanonicalName());
    Compression.Algorithm.ZSTD.reload(conf);
    HFileTestBase.setUpBeforeClass();
  }

  @Test
  public void testWithStreamDecompression() throws Exception {
    conf.setBoolean("hbase.io.compress.zstd.allowByteBuffDecompression", false);
    Compression.Algorithm.ZSTD.reload(conf);

    Path path = new Path(TEST_UTIL.getDataTestDir(),
      HBaseTestingUtility.getRandomUUID().toString() + ".hfile");
    doTest(conf, path, Compression.Algorithm.ZSTD);
  }

  @Test
  public void testWithByteBuffDecompression() throws Exception {
    Path path = new Path(TEST_UTIL.getDataTestDir(),
      HBaseTestingUtility.getRandomUUID().toString() + ".hfile");
    doTest(conf, path, Compression.Algorithm.ZSTD);
  }

  @Test
  public void testReconfLevels() throws Exception {
    Path path_1 = new Path(TEST_UTIL.getDataTestDir(),
      HBaseTestingUtility.getRandomUUID().toString() + ".1.hfile");
    Path path_2 = new Path(TEST_UTIL.getDataTestDir(),
      HBaseTestingUtility.getRandomUUID().toString() + ".2.hfile");
    conf.setInt(ZstdCodec.ZSTD_LEVEL_KEY, 1);
    doTest(conf, path_1, Compression.Algorithm.ZSTD);
    long len_1 = FS.getFileStatus(path_1).getLen();
    conf.setInt(ZstdCodec.ZSTD_LEVEL_KEY, 22);
    doTest(conf, path_2, Compression.Algorithm.ZSTD);
    long len_2 = FS.getFileStatus(path_2).getLen();
    LOG.info("Level 1 len {}", len_1);
    LOG.info("Level 22 len {}", len_2);
    assertTrue(len_1 > len_2, "Reconfiguration with ZSTD_LEVEL_KEY did not seem to work");
  }
}
