/*
    * 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.artifact.repository.metadata;
  
  import java.io.File;
  import java.util.Collections;
  import java.util.Map;
  
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.repository.DefaultArtifactRepository;
  import org.codehaus.plexus.util.FileUtils;
  import org.eclipse.aether.RepositoryException;
  import org.eclipse.aether.metadata.AbstractMetadata;
  import org.eclipse.aether.metadata.MergeableMetadata;
  import org.eclipse.aether.metadata.Metadata;
  
  /**
   * <strong>Warning:</strong> This is an internal utility class that is only public for technical reasons, it is not part
   * of the public API. In particular, this class can be changed or deleted without prior notice.
   *
   * @author Benjamin Bentmann
   */
  public final class MetadataBridge extends AbstractMetadata implements MergeableMetadata {
  
      private ArtifactMetadata metadata;
  
      private boolean merged;
  
      public MetadataBridge(ArtifactMetadata metadata) {
          this.metadata = metadata;
      }
  
      public void merge(File current, File result) throws RepositoryException {
          try {
              if (current.exists()) {
                  FileUtils.copyFile(current, result);
              }
              ArtifactRepository localRepo = new MetadataRepository(result);
              metadata.storeInLocalRepository(localRepo, localRepo);
              merged = true;
          } catch (Exception e) {
              throw new RepositoryException(e.getMessage(), e);
          }
      }
  
      public boolean isMerged() {
          return merged;
      }
  
      public String getGroupId() {
          return emptify(metadata.getGroupId());
      }
  
      public String getArtifactId() {
          return metadata.storedInGroupDirectory() ? "" : emptify(metadata.getArtifactId());
      }
  
      public String getVersion() {
          return metadata.storedInArtifactVersionDirectory() ? emptify(metadata.getBaseVersion()) : "";
      }
  
      public String getType() {
          return metadata.getRemoteFilename();
      }
  
      private String emptify(String string) {
          return (string != null) ? string : "";
      }
  
      public File getFile() {
          return null;
      }
  
      public MetadataBridge setFile(File file) {
          return this;
      }
  
      public Nature getNature() {
          if (metadata instanceof RepositoryMetadata) {
              switch (((RepositoryMetadata) metadata).getNature()) {
                  case RepositoryMetadata.RELEASE_OR_SNAPSHOT:
                      return Nature.RELEASE_OR_SNAPSHOT;
                 case RepositoryMetadata.SNAPSHOT:
                     return Nature.SNAPSHOT;
                 default:
                     return Nature.RELEASE;
             }
         } else {
             return Nature.RELEASE;
         }
     }
 
     public Map<String, String> getProperties() {
         return Collections.emptyMap();
     }
 
     @Override
     public Metadata setProperties(Map<String, String> properties) {
         return this;
     }
 
     @SuppressWarnings("deprecation")
     static class MetadataRepository extends DefaultArtifactRepository {
 
         private File metadataFile;
 
         MetadataRepository(File metadataFile) {
             super("local", "", null);
             this.metadataFile = metadataFile;
         }
 
         @Override
         public String getBasedir() {
             return metadataFile.getParent();
         }
 
         @Override
         public String pathOfLocalRepositoryMetadata(ArtifactMetadata metadata, ArtifactRepository repository) {
             return metadataFile.getName();
         }
     }
 }