/*
    * 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.IOException;
  import java.util.List;
  import java.util.stream.StreamSupport;
  
  import org.junit.Test;
  
  import static org.apache.maven.index.reader.TestUtils.expandFunction;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.core.IsEqual.equalTo;
  
  /**
   * UT for {@link IndexWriter}
   */
  public class IndexWriterTest extends TestSupport {
      @Test
      public void roundtrip() throws IOException {
          try (WritableResourceHandler writableResourceHandler = createWritableResourceHandler()) {
              try (IndexReader indexReader = new IndexReader(null, testResourceHandler("simple"));
                      IndexWriter indexWriter =
                              new IndexWriter(writableResourceHandler, indexReader.getIndexId(), false)) {
                  for (ChunkReader chunkReader : indexReader) {
                      try (chunkReader) {
                          indexWriter.writeChunk(chunkReader.iterator());
                      }
                  }
              }
  
              // read what we wrote out
              try (IndexReader indexReader = new IndexReader(null, writableResourceHandler)) {
                  assertThat(indexReader.getIndexId(), equalTo("apache-snapshots-local"));
                  // assertThat(indexReader.getPublishedTimestamp().getTime(), equalTo(published.getTime()));
                  assertThat(indexReader.isIncremental(), equalTo(false));
                  assertThat(indexReader.getChunkNames(), equalTo(List.of("nexus-maven-repository-index.gz")));
                  int chunks = 0;
                  int records = 0;
                  for (ChunkReader chunkReader : indexReader) {
                      chunks++;
                      assertThat(chunkReader.getName(), equalTo("nexus-maven-repository-index.gz"));
                      assertThat(chunkReader.getVersion(), equalTo(1));
                      // assertThat(chunkReader.getTimestamp().getTime(), equalTo(1243533418015L));
                      records = (int) StreamSupport.stream(chunkReader.spliterator(), false)
                              .map(expandFunction)
                              .count();
                  }
  
                  assertThat(chunks, equalTo(1));
                  assertThat(records, equalTo(5));
              }
          }
      }
  }