/*
    * 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.examples.services.impl;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.LinkedHashMap;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.lucene.queryparser.classic.ParseException;
  import org.apache.maven.index.ArtifactInfo;
  import org.apache.maven.index.examples.indexing.RepositoryIndexManager;
  import org.apache.maven.index.examples.indexing.RepositoryIndexer;
  import org.apache.maven.index.examples.indexing.SearchRequest;
  import org.apache.maven.index.examples.indexing.SearchResults;
  import org.apache.maven.index.examples.services.ArtifactIndexingService;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Component;
  
  /**
   * @author mtodorov
   */
  @Component
  public class ArtifactIndexingServiceImpl implements ArtifactIndexingService {
  
      private static final Logger LOGGER = LoggerFactory.getLogger(ArtifactIndexingServiceImpl.class);
  
      @Autowired
      private RepositoryIndexManager repositoryIndexManager;
  
      @Override
      public void addToIndex(
              String repositoryId,
              File artifactFile,
              String groupId,
              String artifactId,
              String version,
              String extension,
              String classifier)
              throws IOException {
          final RepositoryIndexer indexer = repositoryIndexManager.getRepositoryIndex(repositoryId);
  
          indexer.addArtifactToIndex(repositoryId, artifactFile, groupId, artifactId, version, extension, classifier);
      }
  
      @Override
      public void deleteFromIndex(
              String repositoryId, String groupId, String artifactId, String version, String extension, String classifier)
              throws IOException {
          final RepositoryIndexer indexer = repositoryIndexManager.getRepositoryIndex(repositoryId);
          if (indexer != null) {
              indexer.delete(
                      Arrays.asList(new ArtifactInfo(repositoryId, groupId, artifactId, version, classifier, extension)));
          }
      }
  
      @Override
      public SearchResults search(SearchRequest searchRequest) throws IOException, ParseException {
          SearchResults searchResults = new SearchResults();
  
          final String repositoryId = searchRequest.getRepository();
  
          if (repositoryId != null && !repositoryId.isEmpty()) {
              LOGGER.debug("Repository: {}", repositoryId);
  
              final Map<String, Collection<ArtifactInfo>> resultsMap =
                      getResultsMap(repositoryId, searchRequest.getQuery());
  
              if (!resultsMap.isEmpty()) {
                  searchResults.setResults(resultsMap);
              }
  
              if (LOGGER.isDebugEnabled()) {
                  int results = resultsMap.entrySet().iterator().next().getValue().size();
  
                  LOGGER.debug("Results: {}", results);
              }
          } else {
             Map<String, Collection<ArtifactInfo>> resultsMap = new LinkedHashMap<>();
             for (String repoId : repositoryIndexManager.getIndexes().keySet()) {
                 LOGGER.debug("Repository: {}", repoId);
 
                 final RepositoryIndexer repositoryIndex = repositoryIndexManager.getRepositoryIndex(repoId);
                 if (repositoryIndex != null) {
                     final Set<ArtifactInfo> artifactInfoResults =
                             repositoryIndexManager.getRepositoryIndex(repoId).search(searchRequest.getQuery());
 
                     if (!artifactInfoResults.isEmpty()) {
                         resultsMap.put(repoId, artifactInfoResults);
                     }
 
                     LOGGER.debug("Results: {}", artifactInfoResults.size());
                 }
             }
 
             searchResults.setResults(resultsMap);
         }
 
         return searchResults;
     }
 
     @Override
     public boolean contains(SearchRequest searchRequest) throws IOException, ParseException {
         return !getResultsMap(searchRequest.getRepository(), searchRequest.getQuery())
                 .isEmpty();
     }
 
     public Map<String, Collection<ArtifactInfo>> getResultsMap(String repositoryId, String query)
             throws IOException, ParseException {
         Map<String, Collection<ArtifactInfo>> resultsMap = new LinkedHashMap<>();
         final Set<ArtifactInfo> artifactInfoResults =
                 repositoryIndexManager.getRepositoryIndex(repositoryId).search(query);
 
         if (!artifactInfoResults.isEmpty()) {
             resultsMap.put(repositoryId, artifactInfoResults);
         }
 
         return resultsMap;
     }
 
     public RepositoryIndexManager getRepositoryIndexManager() {
         return repositoryIndexManager;
     }
 
     public void setRepositoryIndexManager(RepositoryIndexManager repositoryIndexManager) {
         this.repositoryIndexManager = repositoryIndexManager;
     }
 }