package org.apache.maven.scm.provider.vss.commands.update;
   
   /*
    * 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.scm.ScmFile;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.log.ScmLogger;
  import org.apache.maven.scm.provider.vss.commands.VssConstants;
  import org.apache.maven.scm.provider.vss.repository.VssScmProviderRepository;
  import org.apache.maven.scm.util.AbstractConsumer;
  import org.codehaus.plexus.util.cli.StreamConsumer;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author <a href="mailto:triek@thrx.de">Thorsten Riek</a>
   *
   */
  public class VssUpdateConsumer
      extends AbstractConsumer
      implements StreamConsumer
  {
  
      /**
       * expecting file information
       */
      private static final int GET_UNKNOWN = 0;
  
      /**
       * expecting file information
       */
      private static final int GET_FILE = 1;
  
      /**
       * expecting file information
       */
      private static final int REPLACE_FILE = 2;
  
      /**
       * expecting file path information
       */
      private static final int GET_FILE_PATH = 3;
  
      /**
       * expecting writable copy
       */
      private static final int IS_WRITABLE_COPY = 4;
  
      /**
       * expecting working folder
       */
      private static final int SET_WORKING_FOLDER = 5;
  
      /**
       * Marks start of file data
       */
      private static final String START_FILE_PATH = "$/";
  
      /**
       * Marks getting a new File
       */
      private static final String START_GETTING = "Getting";
  
      /**
       * Marks replacing a old File
       */
      private static final String START_REPLACING = "Replacing local copy of ";
  
      /**
       * Marks a writable copy of a File / maybe a conflict
       */
      private static final String START_WRITABLE_COPY = "A writable ";
  
      /**
       * Marks "Set the default folder for project" question
       */
      private static final String CONTAINS_SET_DEFAULT_WORKING_FOLDER = "as the default folder for project";
  
      private String currentPath = "";
  
      private List<ScmFile> updatedFiles = new ArrayList<ScmFile>();
 
     private VssScmProviderRepository repo;
 
     public VssUpdateConsumer( VssScmProviderRepository repo, ScmLogger logger )
     {
         super( logger );
         this.repo = repo;
     }
 
     /** {@inheritDoc} */
     public void consumeLine( String line )
     {
         if ( getLogger().isDebugEnabled() )
         {
             getLogger().debug( line );
         }
 
         switch ( getLineStatus( line ) )
         {
             case GET_FILE_PATH:
                 processGetFilePath( line );
                 break;
             case GET_FILE:
                 processGetFile( line );
                 break;
             case REPLACE_FILE:
                 processReplaceFile( line );
                 break;
             case IS_WRITABLE_COPY:
                 // FIXME is actually in error stream if command is build without -G-
                 processWritableFile( line );
                 break;
             case SET_WORKING_FOLDER:
                 // to trash
                 break;
             default:
                 break;
         }
     }
 
     /**
      * Process the current input line in the Get File state.
      *
      * @param line a line of text from the VSS log output
      */
     private void processGetFile( String line )
     {
         String[] fileLine = line.split( " " );
         updatedFiles.add( new ScmFile( currentPath + "/" + fileLine[1], ScmFileStatus.UPDATED ) );
         if ( getLogger().isInfoEnabled() )
         {
             getLogger().info( fileLine[0] + ": " + currentPath + "/" + fileLine[1] );
         }
 
     }
 
     /**
      * Process the current input line in the Replace File state.
      *
      * @param line a line of text from the VSS log output
      */
     private void processReplaceFile( String line )
     {
         updatedFiles.add(
             new ScmFile( currentPath + "/" + line.substring( START_REPLACING.length() ), ScmFileStatus.UPDATED ) );
         if ( getLogger().isInfoEnabled() )
         {
             getLogger().info( START_REPLACING + currentPath + "/" + line.substring( START_REPLACING.length() ) );
         }
     }
 
     /**
      * Process the current input line in the Get File Path state.
      *
      * @param line a line of text from the VSS log output
      */
     private void processGetFilePath( String line )
     {
         currentPath = line.substring( ( VssConstants.PROJECT_PREFIX + repo.getProject() ).length(), line.length() - 1 );
     }
 
     /**
      * Process the current input line in the writable File state.
      *
      * @param line a line of text from the VSS log output
      */
     private void processWritableFile( String line )
     {
         // FIXME extract file name
         //        String[] fileLine = line.split( " " );
         //        updatedFiles.add( new ScmFile( currentPath + "/" + fileLine[1], ScmFileStatus.MODIFIED ) );
         //        getLogger().info( fileLine[0] + ": " + currentPath + "/" + fileLine[1] );
 
     }
 
     /**
      * Identify the status of a vss get line
      *
      * @param line The line to process
      * @return status
      */
     private int getLineStatus( String line )
     {
         int argument = GET_UNKNOWN;
         if ( line.startsWith( START_FILE_PATH ) )
         {
             argument = GET_FILE_PATH;
         }
         else if ( line.startsWith( START_GETTING ) )
         {
             argument = GET_FILE;
         }
         else if ( line.startsWith( START_REPLACING ) )
         {
             argument = REPLACE_FILE;
         }
         else if ( line.startsWith( START_WRITABLE_COPY ) )
         {
             argument = IS_WRITABLE_COPY;
         }
         else if ( line.indexOf( CONTAINS_SET_DEFAULT_WORKING_FOLDER ) != -1 )
         {
             argument = SET_WORKING_FOLDER;
         }
 
         return argument;
     }
 
     public List<ScmFile> getUpdatedFiles()
     {
         return updatedFiles;
     }
 
 }