/*
    * 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.changelog;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.maven.scm.ChangeFile;
  import org.apache.maven.scm.ChangeSet;
  import org.apache.maven.scm.ScmBranch;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  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.local.repository.LocalScmProviderRepository;
  import org.codehaus.plexus.util.FileUtils;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   * @author Olivier Lamy
   */
  public class LocalChangeLogCommand extends AbstractChangeLogCommand {
      /**
       * {@inheritDoc}
       */
      protected ChangeLogScmResult executeChangeLogCommand(
              ScmProviderRepository repository,
              ScmFileSet fileSet,
              Date startDate,
              Date endDate,
              ScmBranch branch,
              String datePattern)
              throws ScmException {
          LocalScmProviderRepository repo = (LocalScmProviderRepository) repository;
  
          if (branch != null) {
              throw new ScmException("The local scm doesn't support tags.");
          }
  
          File root = new File(repo.getRoot());
  
          String module = repo.getModule();
  
          File source = new File(root, module);
  
          File baseDestination = fileSet.getBasedir();
  
          if (!baseDestination.exists()) {
              throw new ScmException("The working directory doesn't exist (" + baseDestination.getAbsolutePath() + ").");
          }
  
          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<ChangeSet> changeLogList = new ArrayList<>();
  
          try {
              File repoRoot = new File(repo.getRoot(), repo.getModule());
  
              List<File> files = fileSet.getFileList();
  
              if (files.isEmpty()) {
                  files = FileUtils.getFiles(baseDestination, "**", null, false);
              }
  
              for (File file : files) {
  
                  String path = file.getPath().replace('\\', '/');
  
                  File repoFile = new File(repoRoot, path);
  
                  file = new File(baseDestination, path);
  
                 ChangeSet changeSet = new ChangeSet();
 
                 int chop = repoRoot.getAbsolutePath().length();
 
                 String fileName = "/" + repoFile.getAbsolutePath().substring(chop + 1);
 
                 changeSet.addFile(new ChangeFile(fileName, null));
 
                 if (repoFile.exists()) {
                     long lastModified = repoFile.lastModified();
 
                     Date modifiedDate = new Date(lastModified);
 
                     if (startDate != null) {
                         if (startDate.before(modifiedDate) || startDate.equals(modifiedDate)) {
                             if (endDate != null) {
                                 if (endDate.after(modifiedDate) || endDate.equals(modifiedDate)) {
                                     // nop
                                 } else {
                                     continue;
                                 }
                             }
                         } else {
                             continue;
                         }
                     }
 
                     changeSet.setDate(modifiedDate);
 
                     changeLogList.add(changeSet);
                 } else {
                     // This file is deleted
                     changeLogList.add(changeSet);
                 }
             }
         } catch (IOException ex) {
             throw new ScmException("Error while getting change logs.", ex);
         }
 
         return new ChangeLogScmResult(null, new ChangeLogSet(changeLogList, startDate, endDate));
     }
 }