/*
    * 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.local.command.list;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.list.AbstractListCommand;
  import org.apache.maven.scm.command.list.ListScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.local.repository.LocalScmProviderRepository;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   */
  public class LocalListCommand extends AbstractListCommand {
      /**
       * {@inheritDoc}
       */
      protected ListScmResult executeListCommand(
              ScmProviderRepository repo, ScmFileSet fileSet, boolean recursive, ScmVersion version) throws ScmException {
          if (version != null) {
              throw new ScmException("The local scm doesn't support tags.");
          }
  
          LocalScmProviderRepository repository = (LocalScmProviderRepository) repo;
  
          File root = new File(repository.getRoot());
  
          String module = repository.getModule();
  
          File source = new File(root, module);
  
          if (!root.exists()) {
              throw new ScmException("The base directory doesn't exist (" + root.getAbsolutePath() + ").");
          }
  
          if (!source.exists()) {
              throw new ScmException("The module directory doesn't exist (" + source.getAbsolutePath() + ").");
          }
  
          if (logger.isInfoEnabled()) {
              logger.info("Listing files of '" + source.getAbsolutePath() + "'.");
          }
  
          try {
              if (fileSet.getFileList() == null || fileSet.getFileList().isEmpty()) {
                  return new LocalListScmResult(null, getFiles(source, source, recursive));
              } else {
                  List<ScmFile> files = new ArrayList<>();
  
                  for (File file : fileSet.getFileList()) {
                      files.addAll(getFiles(source, new File(source, file.getPath()), recursive));
                  }
  
                  return new LocalListScmResult(null, files);
              }
          } catch (IOException e) {
              return new ListScmResult(null, "The svn command failed.", e.getMessage(), false);
          }
      }
  
      private List<ScmFile> getFiles(File source, File directory, boolean recursive) throws IOException {
          if (!directory.exists()) {
              throw new IOException("Directory '" + directory.getAbsolutePath() + "' doesn't exist.");
          }
  
          List<ScmFile> files = new ArrayList<>();
  
          File[] filesArray = directory.listFiles();
  
          if (filesArray != null) {
              for (int i = 0; i < filesArray.length; i++) {
                  File f = filesArray[i];
  
                 String path =
                         f.getAbsolutePath().substring(source.getAbsolutePath().length());
                 path = StringUtils.replace(path, "\\", "/");
                 path = StringUtils.replace(path, "/./", "/");
 
                 files.add(new ScmFile(path, ScmFileStatus.CHECKED_IN));
 
                 if (f.isDirectory() && recursive) {
                     files.addAll(getFiles(source, f, recursive));
                 }
             }
         }
 
         return files;
     }
 }