package org.apache.maven.archetype.ui.generation;
   
   /*
    * 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.commons.lang.math.NumberUtils;
  import org.apache.maven.archetype.catalog.Archetype;
  import org.apache.maven.archetype.ui.ArchetypeDefinition;
  import org.apache.maven.artifact.versioning.ArtifactVersion;
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.annotations.Requirement;
  import org.codehaus.plexus.components.interactivity.Prompter;
  import org.codehaus.plexus.components.interactivity.PrompterException;
  import org.codehaus.plexus.logging.AbstractLogEnabled;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  import java.util.SortedMap;
  import java.util.TreeMap;
  
  @Component( role = ArchetypeSelectionQueryer.class, hint = "default" )
  public class DefaultArchetypeSelectionQueryer
      extends AbstractLogEnabled
      implements ArchetypeSelectionQueryer
  {
      @Requirement( hint = "archetype" )
      private Prompter prompter;
  
      public boolean confirmSelection( ArchetypeDefinition archetypeDefinition )
          throws PrompterException
      {
          String query =
              "Confirm archetype selection: \n" + archetypeDefinition.getGroupId() + "/" + archetypeDefinition.getName()
                  + "\n";
  
          String answer = prompter.prompt( query, Arrays.asList( new String[]{ "Y", "N" } ), "Y" );
  
          return "Y".equalsIgnoreCase( answer );
      }
  
      public Archetype selectArchetype( Map<String, List<Archetype>> catalogs )
          throws PrompterException
      {
          return selectArchetype( catalogs, null );
      }
  
      public Archetype selectArchetype( Map<String, List<Archetype>> catalogs, ArchetypeDefinition defaultDefinition )
          throws PrompterException
      {
          Archetype selection = null;
          Map<String, List<Archetype>> filteredCatalogs = catalogs;
  
          do
          {
              StringBuilder query = new StringBuilder( "Choose archetype:\n" );
  
              Set<String> archetypeKeys = new HashSet<String>();
              List<String> answers = new ArrayList<String>();
              Map<String, Archetype> archetypeAnswerMap = new HashMap<String, Archetype>();
  
              int counter = 0;
              int defaultSelection = 0;
  
              for ( Map.Entry<String, List<Archetype>> entry : filteredCatalogs.entrySet() )
              {
                  String catalog = entry.getKey();
  
                  for ( Archetype archetype : entry.getValue() )
                  {
                      String archetypeKey = archetype.getGroupId() + ":" + archetype.getArtifactId();
  
                      if ( !archetypeKeys.add( archetypeKey ) )
                      {
                          continue;
                      }
  
                      counter++;
 
                     String description = archetype.getDescription();
                     if ( description == null )
                     {
                         description = "-";
                     }
 
                     String answer = String.valueOf( counter );
 
                     query.append( answer + ": " + catalog + " -> " + archetype.getGroupId() + ":"
                         + archetype.getArtifactId() + " (" + description + ")\n" );
 
                     answers.add( answer );
 
                     archetypeAnswerMap.put( answer, archetype );
 
                     // the version is not tested. This is intentional.
                     if ( defaultDefinition != null && archetype.getGroupId().equals( defaultDefinition.getGroupId() )
                         && archetype.getArtifactId().equals( defaultDefinition.getArtifactId() ) )
                     {
                         defaultSelection = counter;
                     }
                 }
             }
 
             if ( counter == 0 )
             {
                 query.append( "   Your filter doesn't match any archetype (hint: enter to return to initial list)\n" );
             }
 
             query.append( "Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): " );
 
             String answer;
             if ( defaultSelection == 0 )
             {
                 answer = prompter.prompt( query.toString() );
             }
             else
             {
                 answer = prompter.prompt( query.toString(), Integer.toString( defaultSelection ) );
             }
 
             if ( NumberUtils.isNumber( answer ) )
             {
                 selection = archetypeAnswerMap.get( answer );
             }
             else
             {
                 // not a number so apply filter and ask again
                 filteredCatalogs = ArchetypeSelectorUtils.getFilteredArchetypesByCatalog( catalogs, answer );
             }
         }
         while ( selection == null );
 
         return selectVersion( catalogs, selection.getGroupId(), selection.getArtifactId() );
     }
 
     private Archetype selectVersion( Map<String, List<Archetype>> catalogs, String groupId, String artifactId )
         throws PrompterException
     {
         SortedMap<ArtifactVersion, Archetype> archetypeVersionsMap = new TreeMap<ArtifactVersion, Archetype>();
 
         for ( Map.Entry<String, List<Archetype>> entry : catalogs.entrySet() )
         {
             for ( Archetype archetype : entry.getValue() )
             {
                 if ( !groupId.equals( archetype.getGroupId() ) || !artifactId.equals( archetype.getArtifactId() ) )
                 {
                     continue;
                 }
 
                 ArtifactVersion version = new DefaultArtifactVersion( archetype.getVersion() );
 
                 // don't override the first catalog containing a defined version of the artifact
                 if ( !archetypeVersionsMap.containsKey( version ) )
                 {
                     archetypeVersionsMap.put( version, archetype );
                 }
             }
         }
 
         if ( archetypeVersionsMap.size() == 1 )
         {
             return archetypeVersionsMap.values().iterator().next();
         }
 
         // let the user choose between available versions
         StringBuilder query = new StringBuilder( "Choose " + groupId + ":" + artifactId + " version: \n" );
 
         List<String> answers = new ArrayList<String>();
         Map<String, Archetype> answerMap = new HashMap<String, Archetype>();
 
         int counter = 1;
         String mapKey = null;
 
         for ( Map.Entry<ArtifactVersion, Archetype> entry : archetypeVersionsMap.entrySet() )
         {
             ArtifactVersion version = entry.getKey();
             Archetype archetype = entry.getValue();
 
             mapKey = String.valueOf( counter );
 
             query.append( mapKey + ": " + version + "\n" );
 
             answers.add( mapKey );
 
             answerMap.put( mapKey, archetype );
 
             counter++;
         }
 
         query.append( "Choose a number: " );
 
         Archetype archetype = null;
 
         do
         {
             String answer = prompter.prompt( query.toString(), answers, mapKey );
 
             archetype = answerMap.get( answer );
         }
         while ( archetype == null );
 
         return archetype;
     }
 
     public void setPrompter( Prompter prompter )
     {
         this.prompter = prompter;
     }
 }