package org.apache.maven.scm.provider.perforce.command.changelog;
   
   /*
    * 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.io.File;
  import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.maven.scm.ScmBranch;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.changelog.AbstractChangeLogCommand;
  import org.apache.maven.scm.command.changelog.ChangeLogScmResult;
  import org.apache.maven.scm.command.changelog.ChangeLogSet;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.perforce.PerforceScmProvider;
  import org.apache.maven.scm.provider.perforce.command.PerforceCommand;
  import org.apache.maven.scm.provider.perforce.repository.PerforceScmProviderRepository;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   * @author Olivier Lamy
   *
   */
  public class PerforceChangeLogCommand
      extends AbstractChangeLogCommand
      implements PerforceCommand
  {
      /** {@inheritDoc} */
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            ScmVersion startVersion, ScmVersion endVersion,
                                                            String datePattern )
          throws ScmException
      {
          return executeChangeLogCommand( repo, fileSet, null, null, null, datePattern, startVersion, endVersion );
      }
  
      /** {@inheritDoc} */
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            Date startDate, Date endDate, ScmBranch branch,
                                                            String datePattern )
          throws ScmException
      {
          if ( branch != null && StringUtils.isNotEmpty( branch.getName() ) )
          {
              throw new ScmException( "This SCM doesn't support branches." );
          }
  
          return executeChangeLogCommand( repo, fileSet, startDate, endDate, branch, datePattern, null, null );
      }
  
      protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                            Date startDate, Date endDate, ScmBranch branch,
                                                            String datePattern, ScmVersion startVersion,
                                                            ScmVersion endVersion )
          throws ScmException
      {
          PerforceScmProviderRepository p4repo = (PerforceScmProviderRepository) repo;
          String clientspec = PerforceScmProvider.getClientspecName( getLogger(), p4repo, fileSet.getBasedir() );
          Commandline cl =
              createCommandLine( p4repo, fileSet.getBasedir(), clientspec, null, startDate, endDate, startVersion,
                                 endVersion );
  
          String location = PerforceScmProvider.getRepoPath( getLogger(), p4repo, fileSet.getBasedir() );
          PerforceChangesConsumer consumer =
              new PerforceChangesConsumer( getLogger() );
  
          try
          {
              if ( getLogger().isDebugEnabled() )
              {
                  getLogger().debug( PerforceScmProvider.clean( "Executing " + cl.toString() ) );
              }
  
              CommandLineUtils.StringStreamConsumer err = new CommandLineUtils.StringStreamConsumer();
             int exitCode = CommandLineUtils.executeCommandLine( cl, consumer, err );
 
             if ( exitCode != 0 )
             {
                 String cmdLine = CommandLineUtils.toString( cl.getCommandline() );
 
                 StringBuilder msg = new StringBuilder( "Exit code: " + exitCode + " - " + err.getOutput() );
                 msg.append( '\n' );
                 msg.append( "Command line was:" + cmdLine );
 
                 throw new CommandLineException( msg.toString() );
             }
         }
         catch ( CommandLineException e )
         {
             if ( getLogger().isErrorEnabled() )
             {
                 getLogger().error( "CommandLineException " + e.getMessage(), e );
             }
         }
 
         List<String> changes = consumer.getChanges();
 
         cl = PerforceScmProvider.createP4Command( p4repo, fileSet.getBasedir() );
         cl.createArg().setValue( "describe" );
         cl.createArg().setValue( "-s" );
 
         for ( String change : changes )
         {
             cl.createArg().setValue( change );
         }
 
         PerforceDescribeConsumer describeConsumer =
             new PerforceDescribeConsumer( location, datePattern, getLogger() );
 
         try
         {
             if ( getLogger().isDebugEnabled() )
             {
                 getLogger().debug( PerforceScmProvider.clean( "Executing " + cl.toString() ) );
             }
 
             CommandLineUtils.StringStreamConsumer err = new CommandLineUtils.StringStreamConsumer();
             int exitCode = CommandLineUtils.executeCommandLine( cl, describeConsumer, err );
 
             if ( exitCode != 0 )
             {
                 String cmdLine = CommandLineUtils.toString( cl.getCommandline() );
 
                 StringBuilder msg = new StringBuilder( "Exit code: " + exitCode + " - " + err.getOutput() );
                 msg.append( '\n' );
                 msg.append( "Command line was:" + cmdLine );
 
                 throw new CommandLineException( msg.toString() );
             }
         }
         catch ( CommandLineException e )
         {
             if ( getLogger().isErrorEnabled() )
             {
                 getLogger().error( "CommandLineException " + e.getMessage(), e );
             }
         }
 
         ChangeLogSet cls = new ChangeLogSet( describeConsumer.getModifications(), null, null );
         cls.setStartVersion( startVersion );
         cls.setEndVersion( endVersion );
         return new ChangeLogScmResult( cl.toString(), cls );
     }
 
     public static Commandline createCommandLine( PerforceScmProviderRepository repo, File workingDirectory,
                                                  String clientspec, ScmBranch branch, Date startDate, Date endDate,
                                                  ScmVersion startVersion, ScmVersion endVersion )
     {
         DateFormat dateFormat = new SimpleDateFormat( "yyyy/MM/dd:HH:mm:ss" );
         Commandline command = PerforceScmProvider.createP4Command( repo, workingDirectory );
 
         if ( clientspec != null )
         {
             command.createArg().setValue( "-c" );
             command.createArg().setValue( clientspec );
         }
         command.createArg().setValue( "changes" );
         command.createArg().setValue( "-t" );
 
         StringBuilder fileSpec = new StringBuilder( "..." );
         if ( startDate != null )
         {
             fileSpec.append( "@" )
                  .append( dateFormat.format( startDate ) )
                  .append( "," );
 
             if ( endDate != null )
             {
                 fileSpec.append( dateFormat.format( endDate ) );
             }
             else
             {
                 fileSpec.append( "now" );
             }
         }
 
         if ( startVersion != null )
         {
             fileSpec.append( "@" ).append( startVersion.getName() ).append( "," );
 
             if ( endVersion != null )
             {
                 fileSpec.append( endVersion.getName() );
             }
             else
             {
                 fileSpec.append( "now" );
             }
         }
 
         command.createArg().setValue( fileSpec.toString() );
 
         return command;
     }
 }