package org.apache.maven.artifact.repository;
   
   /*
    * 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.
   */
  
  import java.io.File;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  
  import org.apache.maven.RepositoryUtils;
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
  import org.apache.maven.artifact.repository.layout.DefaultRepositoryLayout;
  import org.apache.maven.artifact.repository.metadata.RepositoryMetadataStoreException;
  import org.apache.maven.repository.Proxy;
  import org.eclipse.aether.DefaultRepositorySystemSession;
  import org.eclipse.aether.RepositorySystem;
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.metadata.Metadata;
  import org.eclipse.aether.repository.LocalArtifactRegistration;
  import org.eclipse.aether.repository.LocalArtifactRequest;
  import org.eclipse.aether.repository.LocalArtifactResult;
  import org.eclipse.aether.repository.LocalMetadataRegistration;
  import org.eclipse.aether.repository.LocalMetadataRequest;
  import org.eclipse.aether.repository.LocalMetadataResult;
  import org.eclipse.aether.repository.LocalRepository;
  import org.eclipse.aether.repository.LocalRepositoryManager;
  import org.eclipse.aether.repository.RemoteRepository;
  
  /**
   * <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 class LegacyLocalRepositoryManager
      implements LocalRepositoryManager
  {
  
      private final ArtifactRepository delegate;
  
      private final LocalRepository repo;
  
      private final boolean realLocalRepo;
  
      public static RepositorySystemSession overlay( ArtifactRepository repository, RepositorySystemSession session,
                                                     RepositorySystem system )
      {
          if ( repository == null || repository.getBasedir() == null )
          {
              return session;
          }
  
          if ( session != null )
          {
              LocalRepositoryManager lrm = session.getLocalRepositoryManager();
              if ( lrm != null && lrm.getRepository().getBasedir().equals( new File( repository.getBasedir() ) ) )
              {
                  return session;
              }
          }
          else
          {
              session = new DefaultRepositorySystemSession();
          }
  
          final LocalRepositoryManager llrm = new LegacyLocalRepositoryManager( repository );
  
          return new DefaultRepositorySystemSession( session ).setLocalRepositoryManager( llrm );
      }
  
      private LegacyLocalRepositoryManager( ArtifactRepository delegate )
      {
          this.delegate = Objects.requireNonNull( delegate, "delegate cannot be null" );
  
          ArtifactRepositoryLayout layout = delegate.getLayout();
          repo =
              new LocalRepository( new File( delegate.getBasedir() ),
                                   ( layout != null ) ? layout.getClass().getSimpleName() : "legacy" );
  
          /*
          * NOTE: "invoker:install" vs "appassembler:assemble": Both mojos use the artifact installer to put an artifact
          * into a repository. In the first case, the result needs to be a proper local repository that one can use for
          * local artifact resolution. In the second case, the result needs to precisely obey the path information of the
          * repository's layout to allow pointing at artifacts within the repository. Unfortunately,
          * DefaultRepositoryLayout does not correctly describe the layout of a local repository which unlike a remote
          * repository never uses timestamps in the filename of a snapshot artifact. The discrepancy gets notable when a
          * remotely resolved snapshot artifact gets passed into pathOf(). So producing a proper local artifact path
          * using DefaultRepositoryLayout requires us to enforce usage of the artifact's base version. This
          * transformation however contradicts the other use case of precisely obeying the repository's layout. The below
          * flag tries to detect which use case applies to make both plugins happy.
          */
         realLocalRepo = ( layout instanceof DefaultRepositoryLayout ) && "local".equals( delegate.getId() );
     }
 
     public LocalRepository getRepository()
     {
         return repo;
     }
 
     public String getPathForLocalArtifact( Artifact artifact )
     {
         if ( realLocalRepo )
         {
             return delegate.pathOf( RepositoryUtils.toArtifact( artifact.setVersion( artifact.getBaseVersion() ) ) );
         }
         return delegate.pathOf( RepositoryUtils.toArtifact( artifact ) );
     }
 
     public String getPathForRemoteArtifact( Artifact artifact, RemoteRepository repository, String context )
     {
         return delegate.pathOf( RepositoryUtils.toArtifact( artifact ) );
     }
 
     public String getPathForLocalMetadata( Metadata metadata )
     {
         return delegate.pathOfLocalRepositoryMetadata( new ArtifactMetadataAdapter( metadata ), delegate );
     }
 
     public String getPathForRemoteMetadata( Metadata metadata, RemoteRepository repository, String context )
     {
         return delegate.pathOfLocalRepositoryMetadata( new ArtifactMetadataAdapter( metadata ),
                                                        new ArtifactRepositoryAdapter( repository ) );
     }
 
     public LocalArtifactResult find( RepositorySystemSession session, LocalArtifactRequest request )
     {
         String path = getPathForLocalArtifact( request.getArtifact() );
         File file = new File( getRepository().getBasedir(), path );
 
         LocalArtifactResult result = new LocalArtifactResult( request );
         if ( file.isFile() )
         {
             result.setFile( file );
             result.setAvailable( true );
         }
 
         return result;
     }
 
     public LocalMetadataResult find( RepositorySystemSession session, LocalMetadataRequest request )
     {
         Metadata metadata = request.getMetadata();
 
         String path;
         if ( request.getRepository() == null )
         {
             path = getPathForLocalMetadata( metadata );
         }
         else
         {
             path = getPathForRemoteMetadata( metadata, request.getRepository(), request.getContext() );
         }
 
         File file = new File( getRepository().getBasedir(), path );
 
         LocalMetadataResult result = new LocalMetadataResult( request );
         if ( file.isFile() )
         {
             result.setFile( file );
         }
 
         return result;
     }
 
     public void add( RepositorySystemSession session, LocalArtifactRegistration request )
     {
         // noop
     }
 
     public void add( RepositorySystemSession session, LocalMetadataRegistration request )
     {
         // noop
     }
 
     static class ArtifactMetadataAdapter
         implements ArtifactMetadata
     {
 
         private final Metadata metadata;
 
         ArtifactMetadataAdapter( Metadata metadata )
         {
             this.metadata = metadata;
         }
 
         public boolean storedInArtifactVersionDirectory()
         {
             return metadata.getVersion().length() > 0;
         }
 
         public boolean storedInGroupDirectory()
         {
             return metadata.getArtifactId().length() <= 0;
         }
 
         public String getGroupId()
         {
             return nullify( metadata.getGroupId() );
         }
 
         public String getArtifactId()
         {
             return nullify( metadata.getArtifactId() );
         }
 
         public String getBaseVersion()
         {
             return nullify( metadata.getVersion() );
         }
 
         private String nullify( String str )
         {
             return ( str == null || str.length() <= 0 ) ? null : str;
         }
 
         public Object getKey()
         {
             return metadata.toString();
         }
 
         public String getRemoteFilename()
         {
             return metadata.getType();
         }
 
         public String getLocalFilename( ArtifactRepository repository )
         {
             return insertRepositoryKey( getRemoteFilename(), repository.getKey() );
         }
 
         private String insertRepositoryKey( String filename, String repositoryKey )
         {
             String result;
             int idx = filename.indexOf( '.' );
             if ( idx < 0 )
             {
                 result = filename + '-' + repositoryKey;
             }
             else
             {
                 result = filename.substring( 0, idx ) + '-' + repositoryKey + filename.substring( idx );
             }
             return result;
         }
 
         public void merge( org.apache.maven.repository.legacy.metadata.ArtifactMetadata metadata )
         {
             // not used
         }
 
         public void merge( ArtifactMetadata metadata )
         {
             // not used
         }
 
         public void storeInLocalRepository( ArtifactRepository localRepository, ArtifactRepository remoteRepository )
             throws RepositoryMetadataStoreException
         {
             // not used
         }
 
         public String extendedToString()
         {
             return metadata.toString();
         }
 
     }
 
     static class ArtifactRepositoryAdapter
         implements ArtifactRepository
     {
 
         private final RemoteRepository repository;
 
         ArtifactRepositoryAdapter( RemoteRepository repository )
         {
             this.repository = repository;
         }
 
         public String pathOf( org.apache.maven.artifact.Artifact artifact )
         {
             return null;
         }
 
         public String pathOfRemoteRepositoryMetadata( ArtifactMetadata artifactMetadata )
         {
             return null;
         }
 
         public String pathOfLocalRepositoryMetadata( ArtifactMetadata metadata, ArtifactRepository repository )
         {
             return null;
         }
 
         public String getUrl()
         {
             return repository.getUrl();
         }
 
         public void setUrl( String url )
         {
         }
 
         public String getBasedir()
         {
             return null;
         }
 
         public String getProtocol()
         {
             return repository.getProtocol();
         }
 
         public String getId()
         {
             return repository.getId();
         }
 
         public void setId( String id )
         {
         }
 
         public ArtifactRepositoryPolicy getSnapshots()
         {
             return null;
         }
 
         public void setSnapshotUpdatePolicy( ArtifactRepositoryPolicy policy )
         {
         }
 
         public ArtifactRepositoryPolicy getReleases()
         {
             return null;
         }
 
         public void setReleaseUpdatePolicy( ArtifactRepositoryPolicy policy )
         {
         }
 
         public ArtifactRepositoryLayout getLayout()
         {
             return null;
         }
 
         public void setLayout( ArtifactRepositoryLayout layout )
         {
         }
 
         public String getKey()
         {
             return getId();
         }
 
         public boolean isUniqueVersion()
         {
             return true;
         }
 
         public boolean isBlacklisted()
         {
             return false;
         }
 
         public void setBlacklisted( boolean blackListed )
         {
         }
 
         public org.apache.maven.artifact.Artifact find( org.apache.maven.artifact.Artifact artifact )
         {
             return null;
         }
 
         public List<String> findVersions( org.apache.maven.artifact.Artifact artifact )
         {
             return Collections.emptyList();
         }
 
         public boolean isProjectAware()
         {
             return false;
         }
 
         public void setAuthentication( Authentication authentication )
         {
         }
 
         public Authentication getAuthentication()
         {
             return null;
         }
 
         public void setProxy( Proxy proxy )
         {
         }
 
         public Proxy getProxy()
         {
             return null;
         }
 
         public List<ArtifactRepository> getMirroredRepositories()
         {
             return Collections.emptyList();
         }
 
         public void setMirroredRepositories( List<ArtifactRepository> mirroredRepositories )
         {
         }
 
     }
 
 }