/*
    * 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.
   */
  package org.apache.maven.scm.provider.svn.svnexe.command.diff;
  
  import java.io.File;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.diff.AbstractDiffCommand;
  import org.apache.maven.scm.command.diff.DiffScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.svn.command.SvnCommand;
  import org.apache.maven.scm.provider.svn.command.diff.SvnDiffConsumer;
  import org.apache.maven.scm.provider.svn.repository.SvnScmProviderRepository;
  import org.apache.maven.scm.provider.svn.svnexe.command.SvnCommandLineUtils;
  import org.codehaus.plexus.util.Os;
  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:brett@apache.org">Brett Porter</a>
   * @author Olivier Lamy
   */
  public class SvnDiffCommand extends AbstractDiffCommand implements SvnCommand {
      private final boolean interactive;
  
      public SvnDiffCommand(boolean interactive) {
          this.interactive = interactive;
      }
  
      /**
       * {@inheritDoc}
       */
      protected DiffScmResult executeDiffCommand(
              ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion startVersion, ScmVersion endVersion)
              throws ScmException {
          Commandline cl =
                  createCommandLine((SvnScmProviderRepository) repo, fileSet.getBasedir(), startVersion, endVersion);
  
          SvnDiffConsumer consumer = new SvnDiffConsumer(fileSet.getBasedir());
  
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          if (logger.isInfoEnabled()) {
              logger.info("Executing: " + SvnCommandLineUtils.cryptPassword(cl));
  
              if (Os.isFamily(Os.FAMILY_WINDOWS)) {
                  logger.info("Working directory: " + cl.getWorkingDirectory().getAbsolutePath());
              }
          }
  
          int exitCode;
  
          try {
              exitCode = SvnCommandLineUtils.execute(cl, consumer, stderr);
          } catch (CommandLineException ex) {
              throw new ScmException("Error while executing command.", ex);
          }
  
          if (exitCode != 0) {
              return new DiffScmResult(cl.toString(), "The svn command failed.", stderr.getOutput(), false);
          }
  
          return new DiffScmResult(
                  cl.toString(), consumer.getChangedFiles(), consumer.getDifferences(), consumer.getPatch());
      }
  
      // ----------------------------------------------------------------------
      //
      // ----------------------------------------------------------------------
  
      public Commandline createCommandLine(
              SvnScmProviderRepository repository,
              File workingDirectory,
              ScmVersion startVersion,
              ScmVersion endVersion) {
          Commandline cl = SvnCommandLineUtils.getBaseSvnCommandLine(workingDirectory, repository, interactive);
  
          cl.createArg().setValue("diff");
  
         cl.createArg().setValue("--internal-diff");
 
         if (startVersion != null && StringUtils.isNotEmpty(startVersion.getName())) {
             cl.createArg().setValue("-r");
 
             if (endVersion != null && StringUtils.isNotEmpty(endVersion.getName())) {
                 cl.createArg().setValue(startVersion.getName() + ":" + endVersion.getName());
             } else {
                 cl.createArg().setValue(startVersion.getName());
             }
         }
 
         return cl;
     }
 }