/*
    * 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.execution;
  
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Collectors;
  
  import org.apache.maven.project.MavenProject;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Default implementation of {@link BuildResumptionAnalyzer}.
   */
  @Named
  @Singleton
  public class DefaultBuildResumptionAnalyzer implements BuildResumptionAnalyzer {
      private static final Logger LOGGER = LoggerFactory.getLogger(DefaultBuildResumptionAnalyzer.class);
  
      @Override
      public Optional<BuildResumptionData> determineBuildResumptionData(final MavenExecutionResult result) {
          if (!result.hasExceptions()) {
              return Optional.empty();
          }
  
          List<MavenProject> sortedProjects = result.getTopologicallySortedProjects();
  
          boolean hasNoSuccess =
                  sortedProjects.stream().noneMatch(project -> result.getBuildSummary(project) instanceof BuildSuccess);
  
          if (hasNoSuccess) {
              return Optional.empty();
          }
  
          List<String> remainingProjects = sortedProjects.stream()
                  .filter(project -> result.getBuildSummary(project) == null
                          || result.getBuildSummary(project) instanceof BuildFailure)
                  .map(project -> project.getGroupId() + ":" + project.getArtifactId())
                  .collect(Collectors.toList());
  
          if (remainingProjects.isEmpty()) {
              LOGGER.info("No remaining projects found, resuming the build would not make sense.");
              return Optional.empty();
          }
  
          return Optional.of(new BuildResumptionData(remainingProjects));
      }
  }