package org.apache.maven.internal.impl;
   
   /*
    * 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.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import java.util.Optional;
  
  import org.apache.maven.api.Dependency;
  import org.apache.maven.api.Node;
  import org.apache.maven.api.RemoteRepository;
  import org.apache.maven.api.annotations.Nonnull;
  import org.eclipse.aether.graph.DependencyNode;
  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
  
  public class DefaultNode extends AbstractNode
  {
  
      protected final @Nonnull AbstractSession session;
      protected final @Nonnull org.eclipse.aether.graph.DependencyNode node;
      protected final boolean verbose;
  
      public DefaultNode( @Nonnull AbstractSession session,
                          @Nonnull org.eclipse.aether.graph.DependencyNode node,
                          boolean verbose )
      {
          this.session = session;
          this.node = node;
          this.verbose = verbose;
      }
  
      @Override
      DependencyNode getDependencyNode()
      {
          return node;
      }
  
      @Override
      public Dependency getDependency()
      {
          return node.getDependency() != null ? session.getDependency( node.getDependency() ) : null;
      }
  
      @Override
      public List<Node> getChildren()
      {
          return new MappedList<>( node.getChildren(), n -> session.getNode( n, verbose ) );
      }
  
      @Override
      public List<RemoteRepository> getRemoteRepositories()
      {
          return new MappedList<>( node.getRepositories(), session::getRemoteRepository );
      }
  
      @Override
      public Optional<RemoteRepository> getRepository()
      {
          // TODO
          throw new UnsupportedOperationException( "Not implemented yet" );
      }
  
      @Override
      public String asString()
      {
          String nodeString = super.asString();
  
          if ( !verbose )
          {
              return nodeString;
          }
  
          org.eclipse.aether.graph.DependencyNode node = getDependencyNode();
  
          List<String> details = new ArrayList<>();
  
          org.eclipse.aether.graph.DependencyNode winner =
                  (org.eclipse.aether.graph.DependencyNode) node.getData().get( ConflictResolver.NODE_DATA_WINNER );
          String winnerVersion = winner != null ? winner.getArtifact().getBaseVersion() : null;
          boolean included = ( winnerVersion == null );
 
         String preManagedVersion = DependencyManagerUtils.getPremanagedVersion( node );
         if ( preManagedVersion != null )
         {
             details.add( "version managed from " + preManagedVersion );
         }
 
         String preManagedScope = DependencyManagerUtils.getPremanagedScope( node );
         if ( preManagedScope != null )
         {
             details.add( "scope managed from " + preManagedScope );
         }
 
         String originalScope = (String) node.getData().get( ConflictResolver.NODE_DATA_ORIGINAL_SCOPE );
         if ( originalScope != null && !originalScope.equals( node.getDependency().getScope() ) )
         {
             details.add( "scope updated from " + originalScope );
         }
 
         if ( !included )
         {
             if ( Objects.equals( winnerVersion, node.getArtifact().getVersion() ) )
             {
                 details.add( "omitted for duplicate" );
             }
             else
             {
                 details.add( "omitted for conflict with " + winnerVersion );
             }
         }
 
         StringBuilder buffer = new StringBuilder();
         if ( included )
         {
             buffer.append( nodeString );
             if ( !details.isEmpty() )
             {
                 buffer.append( " (" );
                 join( buffer, details, "; " );
                 buffer.append( ")" );
             }
         }
         else
         {
             buffer.append( "(" );
             buffer.append( nodeString );
             if ( !details.isEmpty() )
             {
                 buffer.append( " - " );
                 join( buffer, details, "; " );
             }
             buffer.append( ")" );
         }
         return buffer.toString();
     }
 
     private static void join( StringBuilder buffer, List<String> details, String separator )
     {
         boolean first = true;
         for ( String detail : details )
         {
             if ( first )
             {
                 first = false;
             }
             else
             {
                 buffer.append( separator );
             }
             buffer.append( detail );
         }
     }
 
 }