/*
    * 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.Arrays;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  import java.util.stream.StreamSupport;
  
  import org.apache.maven.index.reader.Record.EntryKey;
  import org.apache.maven.index.reader.Record.Type;
  import org.junit.Test;
  
  import static org.apache.maven.index.reader.TestUtils.compactFunction;
  import static org.apache.maven.index.reader.TestUtils.decorate;
  import static org.hamcrest.CoreMatchers.nullValue;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.core.IsEqual.equalTo;
  
  /**
   * UT for {@link RecordCompactor} and {@link RecordExpander}.
   */
  public class TransformTest extends TestSupport {
      @Test
      public void decorateAndTransform() throws IOException {
          final String indexId = "test";
          final Record r1 = new Record(Type.ARTIFACT_ADD, artifactMap("org.apache"));
          final Record r2 = new Record(Type.ARTIFACT_ADD, artifactMap("org.foo"));
          final Record r3 = new Record(Type.ARTIFACT_ADD, artifactMap("com.bar"));
  
          Iterable<Map<String, String>> iterable = StreamSupport.stream(
                          decorate(Arrays.asList(r1, r2, r3), indexId).spliterator(), false)
                  .map(compactFunction)
                  .collect(Collectors.toList());
  
          ;
          try (WritableResourceHandler writableResourceHandler = createWritableResourceHandler()) {
              try (IndexWriter indexWriter = new IndexWriter(writableResourceHandler, indexId, false)) {
                  indexWriter.writeChunk(iterable.iterator());
                  indexWriter.close();
              }
  
              try (IndexReader indexReader = new IndexReader(null, writableResourceHandler)) {
                  assertThat(indexReader.getChunkNames(), equalTo(List.of("nexus-maven-repository-index.gz")));
                  ChunkReader chunkReader = indexReader.iterator().next();
                  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(3));
                  assertThat(recordTypes.get(Type.ARTIFACT_REMOVE), nullValue());
  
                  assertThat(
                          recordTypes.get(Type.ROOT_GROUPS).get(0).get(Record.ROOT_GROUPS),
                          equalTo(new String[] {"com", "org"}));
                  assertThat(
                          recordTypes.get(Type.ALL_GROUPS).get(0).get(Record.ALL_GROUPS),
                          equalTo(new String[] {"com.bar", "org.apache", "org.foo"}));
              }
          }
      }
  
      private Map<EntryKey, Object> artifactMap(final String groupId) {
          final HashMap<EntryKey, Object> result = new HashMap<>();
          result.put(Record.GROUP_ID, groupId);
          result.put(Record.ARTIFACT_ID, "artifact");
          result.put(Record.VERSION, "1.0");
          result.put(Record.PACKAGING, "jar");
          result.put(Record.FILE_MODIFIED, System.currentTimeMillis());
          result.put(Record.FILE_SIZE, 123L);
          result.put(Record.FILE_EXTENSION, "jar");
          result.put(Record.HAS_SOURCES, Boolean.FALSE);
          result.put(Record.HAS_JAVADOC, Boolean.FALSE);
          result.put(Record.HAS_SIGNATURE, Boolean.FALSE);
          return result;
      }
  }