/* ==========================================================================
    * Copyright 2003-2004 Mevenide Team
    *
    * Licensed 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.codehaus.mojo.nbm;
  
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.StringTokenizer;
  import java.util.TimeZone;
  
  /**
   *  will try to convert the maven version number to a NetBeans friendly version number.
   * @author <a href="mailto:mkleint@codehaus.org">Milos Kleint</a>
   *
   */
  public class AdaptNbVersion
  {
  
      public static final String TYPE_SPECIFICATION = "spec"; //NOI18N
      public static final String TYPE_IMPLEMENTATION = "impl"; //NOI18N
      private static final String SNAPSHOT = "SNAPSHOT"; //NOI18N
  
      public static String adaptVersion( String version, Object type, Date date )
      {
          StringTokenizer tok = new StringTokenizer( version, "." );
          if ( SNAPSHOT.equals( version ) && TYPE_IMPLEMENTATION.equals( type ) )
          {
              return "0.0.0." + generateSnapshotValue( date );
          }
          StringBuffer toReturn = new StringBuffer();
          while ( tok.hasMoreTokens() )
          {
              String token = tok.nextToken();
              if ( TYPE_IMPLEMENTATION.equals( type ) )
              {
                  int snapshotIndex = token.indexOf( SNAPSHOT );
                  if ( snapshotIndex > 0 )
                  {
                      String repl = token.substring( 0, snapshotIndex ) + generateSnapshotValue( date );
                      if ( token.length() > snapshotIndex + SNAPSHOT.length() )
                      {
                          repl = token.substring(
                                  snapshotIndex + SNAPSHOT.length() );
                      }
                      token = repl;
                  }
              }
              if ( TYPE_SPECIFICATION.equals( type ) )
              {
                  // strip the trailing -RC1, -BETA5, -SNAPSHOT
                  if ( token.indexOf( '-' ) > 0 )
                  {
                      token = token.substring( 0, token.indexOf( '-' ) );
                  } else if ( token.indexOf( '_' ) > 0 )
                  {
                      token = token.substring( 0, token.indexOf( '_' ) );
                  }
                  try
                  {
                      Integer intValue = Integer.valueOf( token );
                      token = intValue.toString();
                  }
                  catch ( NumberFormatException exc )
                  {
                      // ignore, will just not be added to the
                      token = "";
                  }
              }
              if ( token.length() > 0 )
              {
                  if ( toReturn.length() != 0 )
                  {
                      toReturn.append( "." );
                  }
                  toReturn.append( token );
              }
  
          }
          if ( toReturn.length() == 0 )
          {
              toReturn.append( "0.0.0" );
          }
          return toReturn.toString();
      }
  
      private static String generateSnapshotValue( Date date )
     {
         SimpleDateFormat dateFormat = new SimpleDateFormat( "yyyyMMdd" );
         dateFormat.setTimeZone( TimeZone.getTimeZone( "UTC" ) );
         return dateFormat.format( date );
     }
 }