package org.apache.maven.archetype.generator;
   
   /*
    * 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 org.apache.maven.archetype.exception.InvalidPackaging;
  import org.apache.maven.archetype.old.OldArchetype;
  import org.apache.maven.archetype.ArchetypeGenerationRequest;
  import org.apache.maven.archetype.ArchetypeGenerationResult;
  import org.apache.maven.archetype.common.ArchetypeArtifactManager;
  import org.apache.maven.archetype.exception.ArchetypeException;
  import org.apache.maven.archetype.exception.ArchetypeGenerationFailure;
  import org.apache.maven.archetype.exception.ArchetypeNotDefined;
  import org.apache.maven.archetype.exception.UnknownArchetype;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;
  import org.apache.maven.artifact.repository.MavenArtifactRepository;
  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.logging.AbstractLogEnabled;
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  @Component( role = ArchetypeGenerator.class )
  public class DefaultArchetypeGenerator
      extends AbstractLogEnabled
      implements ArchetypeGenerator
  {
      /**
       * Determines whether the layout is legacy or not.
       */
      @Requirement
      private ArtifactRepositoryLayout defaultArtifactRepositoryLayout;
  
      @Requirement
      private ArchetypeArtifactManager archetypeArtifactManager;
  
      @Requirement
      private FilesetArchetypeGenerator filesetGenerator;
  
      @Requirement
      private OldArchetype oldArchetype;
  
      private File getArchetypeFile( ArchetypeGenerationRequest request, ArtifactRepository localRepository )
          throws ArchetypeException
      {
          if ( !isArchetypeDefined( request ) )
          {
              throw new ArchetypeNotDefined( "The archetype is not defined" );
          }
  
          List<ArtifactRepository> repos = new ArrayList<>();
  
          ArtifactRepository remoteRepo = null;
          if ( request != null && request.getArchetypeRepository() != null )
          {
              remoteRepo =
                  createRepository( request.getArchetypeRepository(),
                                                             request.getArchetypeArtifactId() + "-repo" );
  
              repos.add( remoteRepo );
          }
  
          if ( !archetypeArtifactManager.exists( request.getArchetypeGroupId(), request.getArchetypeArtifactId(),
                                                 request.getArchetypeVersion(), remoteRepo, localRepository, repos,
                                                 request.getProjectBuildingRequest() ) )
          {
              throw new UnknownArchetype( "The desired archetype does not exist (" + request.getArchetypeGroupId() + ":"
                  + request.getArchetypeArtifactId() + ":" + request.getArchetypeVersion() + ")" );
          }
  
          File archetypeFile =
              archetypeArtifactManager.getArchetypeFile( request.getArchetypeGroupId(), request.getArchetypeArtifactId(),
                                                         request.getArchetypeVersion(), remoteRepo, localRepository,
                                                         repos, request.getProjectBuildingRequest() );
          return archetypeFile;
      }
  
      private void generateArchetype( ArchetypeGenerationRequest request, File archetypeFile )
         throws ArchetypeException
     {
         if ( archetypeArtifactManager.isFileSetArchetype( archetypeFile ) )
         {
             processFileSetArchetype( request, archetypeFile );
         }
         else if ( archetypeArtifactManager.isOldArchetype( archetypeFile ) )
         {
             processOldArchetype( request, archetypeFile );
         }
         else
         {
             throw new ArchetypeGenerationFailure( "The defined artifact is not an archetype" );
         }
     }
 
     /** Common */
     public String getPackageAsDirectory( String packageName )
     {
         return StringUtils.replace( packageName, ".", "/" );
     }
 
     private boolean isArchetypeDefined( ArchetypeGenerationRequest request )
     {
         return StringUtils.isNotEmpty( request.getArchetypeGroupId() )
             && StringUtils.isNotEmpty( request.getArchetypeArtifactId() )
             && StringUtils.isNotEmpty( request.getArchetypeVersion() );
     }
 
     /** FileSetArchetype */
     private void processFileSetArchetype( ArchetypeGenerationRequest request, File archetypeFile )
         throws ArchetypeException
     {
         filesetGenerator.generateArchetype( request, archetypeFile );
     }
 
     private void processOldArchetype( ArchetypeGenerationRequest request, File archetypeFile )
             throws ArchetypeGenerationFailure, InvalidPackaging
     {
         oldArchetype.createArchetype( request, archetypeFile );
     }
 
     @Override
     public void generateArchetype( ArchetypeGenerationRequest request, File archetypeFile,
                                    ArchetypeGenerationResult result )
     {
         try
         {
             generateArchetype( request, archetypeFile );
         }
         catch ( ArchetypeException e )
         {
             result.setCause( e );
         }
     }
 
     @Override
     public void generateArchetype( ArchetypeGenerationRequest request, ArchetypeGenerationResult result )
     {
         try
         {
             File archetypeFile = getArchetypeFile( request, request.getLocalRepository() );
 
             generateArchetype( request, archetypeFile, result );
         }
         catch ( ArchetypeException ex )
         {
             result.setCause( ex );
         }
     }
     
     private ArtifactRepository createRepository( String url, String repositoryId )
     {
         
         
         // snapshots vs releases
         // offline = to turning the update policy off
 
         // TODO: we'll need to allow finer grained creation of repositories but this will do for now
 
         String updatePolicyFlag = ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS;
 
         String checksumPolicyFlag = ArtifactRepositoryPolicy.CHECKSUM_POLICY_WARN;
 
         ArtifactRepositoryPolicy snapshotsPolicy =
             new ArtifactRepositoryPolicy( true, updatePolicyFlag, checksumPolicyFlag );
 
         ArtifactRepositoryPolicy releasesPolicy =
             new ArtifactRepositoryPolicy( true, updatePolicyFlag, checksumPolicyFlag );
         
         return new MavenArtifactRepository( repositoryId, url, defaultArtifactRepositoryLayout, snapshotsPolicy,
                                             releasesPolicy );
     }
 }