/*
    * 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.command.update;
  
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  import org.apache.maven.scm.ChangeSet;
  import org.apache.maven.scm.CommandParameter;
  import org.apache.maven.scm.CommandParameters;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.AbstractCommand;
  import org.apache.maven.scm.command.changelog.ChangeLogCommand;
  import org.apache.maven.scm.command.changelog.ChangeLogScmResult;
  import org.apache.maven.scm.command.changelog.ChangeLogSet;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse </a>
   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
   *
   */
  public abstract class AbstractUpdateCommand extends AbstractCommand {
      protected abstract UpdateScmResult executeUpdateCommand(
              ScmProviderRepository repository, ScmFileSet fileSet, ScmVersion scmVersion) throws ScmException;
  
      /** {@inheritDoc} */
      public ScmResult executeCommand(ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters)
              throws ScmException {
          ScmVersion scmVersion = parameters.getScmVersion(CommandParameter.SCM_VERSION, null);
  
          boolean runChangelog = Boolean.valueOf(parameters.getString(CommandParameter.RUN_CHANGELOG_WITH_UPDATE, "true"))
                  .booleanValue();
  
          UpdateScmResult updateScmResult = executeUpdateCommand(repository, fileSet, scmVersion);
  
          List<ScmFile> filesList = updateScmResult.getUpdatedFiles();
  
          if (!runChangelog) {
              return updateScmResult;
          }
  
          ChangeLogCommand changeLogCmd = getChangeLogCommand();
  
          if (filesList != null && filesList.size() > 0 && changeLogCmd != null) {
              ChangeLogScmResult changeLogScmResult =
                      (ChangeLogScmResult) changeLogCmd.executeCommand(repository, fileSet, parameters);
  
              List<ChangeSet> changes = new ArrayList<>();
  
              ChangeLogSet changeLogSet = changeLogScmResult.getChangeLog();
  
              if (changeLogSet != null) {
                  Date startDate = null;
  
                  try {
                      startDate = parameters.getDate(CommandParameter.START_DATE);
                  } catch (ScmException e) {
                      // Do nothing, startDate isn't define.
                  }
  
                  for (ChangeSet change : changeLogSet.getChangeSets()) {
                      if (startDate != null && change.getDate() != null) {
                          if (startDate.after(change.getDate())) {
                              continue;
                          }
                      }
  
                      for (ScmFile currentFile : filesList) {
                          if (change.containsFilename(currentFile.getPath())) {
                              changes.add(change);
  
                              break;
                          }
                      }
                  }
              }
  
             updateScmResult.setChanges(changes);
         }
 
         return updateScmResult;
     }
 
     protected abstract ChangeLogCommand getChangeLogCommand();
 }