/*
 * 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.parquet.column.values.rle;

import static org.assertj.core.api.Assertions.assertThat;

import java.nio.ByteBuffer;
import org.apache.parquet.bytes.ByteBufferInputStream;
import org.apache.parquet.bytes.DirectByteBufferAllocator;
import org.junit.jupiter.api.Test;

public class RunLengthBitPackingHybridIntegrationTest {

  @Test
  public void integrationTest() throws Exception {
    for (int i = 0; i <= 32; i++) {
      doIntegrationTest(i);
    }
  }

  private void doIntegrationTest(int bitWidth) throws Exception {
    long modValue = 1L << bitWidth;

    RunLengthBitPackingHybridEncoder encoder =
        new RunLengthBitPackingHybridEncoder(bitWidth, 1000, 64000, new DirectByteBufferAllocator());
    for (int i = 0; i < 100; i++) {
      encoder.writeInt((int) (i % modValue));
    }
    for (int i = 0; i < 100; i++) {
      encoder.writeInt((int) (77 % modValue));
    }
    for (int i = 0; i < 100; i++) {
      encoder.writeInt((int) (88 % modValue));
    }
    for (int i = 0; i < 1000; i++) {
      encoder.writeInt((int) (i % modValue));
      encoder.writeInt((int) (i % modValue));
      encoder.writeInt((int) (i % modValue));
    }
    for (int i = 0; i < 1000; i++) {
      encoder.writeInt((int) (17 % modValue));
    }
    ByteBuffer encodedBytes = encoder.toBytes().toByteBuffer();
    ByteBufferInputStream in = ByteBufferInputStream.wrap(encodedBytes);

    RunLengthBitPackingHybridDecoder decoder = new RunLengthBitPackingHybridDecoder(bitWidth, in);

    for (int i = 0; i < 100; i++) {
      assertThat(decoder.readInt()).isEqualTo(i % modValue);
    }

    for (int i = 0; i < 100; i++) {
      assertThat(decoder.readInt()).isEqualTo(77 % modValue);
    }

    for (int i = 0; i < 100; i++) {
      assertThat(decoder.readInt()).isEqualTo(88 % modValue);
    }

    for (int i = 0; i < 1000; i++) {
      assertThat(decoder.readInt()).isEqualTo(i % modValue);
      assertThat(decoder.readInt()).isEqualTo(i % modValue);
      assertThat(decoder.readInt()).isEqualTo(i % modValue);
    }

    for (int i = 0; i < 1000; i++) {
      assertThat(decoder.readInt()).isEqualTo(17 % modValue);
    }
  }
}
