/*
    * 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.checkout;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  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.checkout.AbstractCheckOutCommand;
  import org.apache.maven.scm.command.checkout.CheckOutScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.local.command.LocalCommand;
  import org.apache.maven.scm.provider.local.metadata.LocalScmMetadataUtils;
  import org.apache.maven.scm.provider.local.repository.LocalScmProviderRepository;
  import org.codehaus.plexus.util.FileUtils;
  
  /**
   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
   */
  public class LocalCheckOutCommand extends AbstractCheckOutCommand implements LocalCommand {
      /**
       * {@inheritDoc}
       */
      protected CheckOutScmResult executeCheckOutCommand(
              ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion version, boolean recursive, boolean shallow)
              throws ScmException {
          LocalScmProviderRepository repository = (LocalScmProviderRepository) repo;
  
          if (version != null) {
              throw new ScmException("The local scm doesn't support tags.");
          }
  
          File root = new File(repository.getRoot());
  
          String module = repository.getModule();
  
          File source = new File(root, module);
  
          File baseDestination = fileSet.getBasedir();
  
          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() + ").");
          }
  
          List<ScmFile> checkedOutFiles;
  
          try {
              if (baseDestination.exists()) {
                  FileUtils.deleteDirectory(baseDestination);
              }
  
              if (!baseDestination.mkdirs()) {
                  throw new ScmException(
                          "Could not create destination directory '" + baseDestination.getAbsolutePath() + "'.");
              }
  
              if (logger.isInfoEnabled()) {
                  logger.info("Checking out '" + source.getAbsolutePath() + "' to '" + baseDestination.getAbsolutePath()
                          + "'.");
              }
  
              List<File> fileList;
  
              if (fileSet.getFileList().isEmpty()) {
                  fileList = FileUtils.getFiles(source.getAbsoluteFile(), "**", null);
              } else {
                  fileList = fileSet.getFileList();
              }
  
              checkedOutFiles = checkOut(source, baseDestination, fileList, repository.getModule());
  
              // write metadata file
              LocalScmMetadataUtils metadataUtils = new LocalScmMetadataUtils();
             metadataUtils.writeMetadata(baseDestination, metadataUtils.buildMetadata(source));
         } catch (IOException ex) {
             throw new ScmException("Error while checking out the files.", ex);
         }
 
         return new LocalCheckOutScmResult(null, checkedOutFiles);
     }
 
     private List<ScmFile> checkOut(File source, File baseDestination, List<File> files, String module)
             throws ScmException, IOException {
         String sourcePath = source.getAbsolutePath();
 
         List<ScmFile> checkedOutFiles = new ArrayList<>();
 
         for (File file : files) {
             String dest = file.getAbsolutePath();
 
             dest = dest.substring(sourcePath.length() + 1);
 
             File destination = new File(baseDestination, dest);
 
             destination = destination.getParentFile();
 
             if (!destination.exists() && !destination.mkdirs()) {
                 throw new ScmException(
                         "Could not create destination directory '" + destination.getAbsolutePath() + "'.");
             }
 
             FileUtils.copyFileToDirectory(file, destination);
 
             String fileName = "/" + module + "/" + dest;
 
             checkedOutFiles.add(new ScmFile(fileName, ScmFileStatus.CHECKED_OUT));
         }
 
         return checkedOutFiles;
     }
 }