/*
    * 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.maven.index.reader;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.util.Date;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.index.reader.Record.Type;
  import org.junit.Test;
  
  import static org.hamcrest.CoreMatchers.nullValue;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.core.IsEqual.equalTo;
  
  /**
   * UT for {@link ChunkReader}
   */
  public class ChunkReaderTest extends TestSupport {
      @Test
      public void simple() throws IOException {
          try (WritableResourceHandler handler = testResourceHandler("simple");
                  ChunkReader chunkReader = new ChunkReader(
                          "full",
                          handler.locate("nexus-maven-repository-index.gz").read())) {
              final Map<Type, List<Record>> recordTypes = loadRecordsByType(chunkReader);
              assertThat(recordTypes.get(Type.DESCRIPTOR).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ROOT_GROUPS).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ALL_GROUPS).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ARTIFACT_ADD).size(), equalTo(2));
              assertThat(recordTypes.get(Type.ARTIFACT_REMOVE), nullValue());
          }
      }
  
      @Test
      public void roundtrip() throws IOException {
          final Date published;
          File tempChunkFile = createTempFile("nexus-maven-repository-index.gz");
          {
              try (WritableResourceHandler resource = testResourceHandler("simple");
                      ChunkReader chunkReader = new ChunkReader(
                              "full",
                              resource.locate("nexus-maven-repository-index.gz").read());
                      ChunkWriter chunkWriter = new ChunkWriter(
                              chunkReader.getName(), new FileOutputStream(tempChunkFile), 1, new Date())) {
                  chunkWriter.writeChunk(chunkReader.iterator());
                  published = chunkWriter.getTimestamp();
              }
          }
  
          try (ChunkReader chunkReader = new ChunkReader("full", new FileInputStream(tempChunkFile))) {
              assertThat(chunkReader.getVersion(), equalTo(1));
              assertThat(chunkReader.getTimestamp().getTime(), equalTo(published.getTime()));
              final Map<Type, List<Record>> recordTypes = loadRecordsByType(chunkReader);
              assertThat(recordTypes.get(Type.DESCRIPTOR).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ROOT_GROUPS).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ALL_GROUPS).size(), equalTo(1));
              assertThat(recordTypes.get(Type.ARTIFACT_ADD).size(), equalTo(2));
              assertThat(recordTypes.get(Type.ARTIFACT_REMOVE), nullValue());
          }
      }
  }