/*
    * 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.eclipse.aether.internal.impl.checksum;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithmFactory;
  import org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithmFactorySelector;
  
  import static java.util.Objects.requireNonNull;
  import static java.util.stream.Collectors.toList;
  
  /**
   * Default implementation.
   *
   * @since 1.8.0
   */
  @Singleton
  @Named
  public class DefaultChecksumAlgorithmFactorySelector implements ChecksumAlgorithmFactorySelector {
      private final Map<String, ChecksumAlgorithmFactory> factories;
  
      @Inject
      public DefaultChecksumAlgorithmFactorySelector(Map<String, ChecksumAlgorithmFactory> factories) {
          this.factories = requireNonNull(factories);
      }
  
      @Override
      public ChecksumAlgorithmFactory select(String algorithmName) {
          requireNonNull(algorithmName, "algorithmMame must not be null");
          ChecksumAlgorithmFactory factory = factories.get(algorithmName);
          if (factory == null) {
              throw new IllegalArgumentException(String.format(
                      "Unsupported checksum algorithm %s, supported ones are %s",
                      algorithmName,
                      getChecksumAlgorithmFactories().stream()
                              .map(ChecksumAlgorithmFactory::getName)
                              .collect(toList())));
          }
          return factory;
      }
  
      @Override
      public List<ChecksumAlgorithmFactory> selectList(Collection<String> algorithmNames) {
          return algorithmNames.stream().map(this::select).collect(toList());
      }
  
      @Override
      public Collection<ChecksumAlgorithmFactory> getChecksumAlgorithmFactories() {
          return Collections.unmodifiableCollection(factories.values());
      }
  
      @Override
      public boolean isChecksumExtension(String extension) {
          requireNonNull(extension);
          if (extension.contains(".")) {
              return factories.values().stream().anyMatch(a -> extension.endsWith("." + a.getFileExtension()));
          } else {
              return factories.values().stream().anyMatch(a -> extension.equals(a.getFileExtension()));
          }
      }
  }