/*
    * 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.hg.command.tag;
  
  import java.io.File;
  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.ScmResult;
  import org.apache.maven.scm.ScmTagParameters;
  import org.apache.maven.scm.command.Command;
  import org.apache.maven.scm.command.tag.AbstractTagCommand;
  import org.apache.maven.scm.command.tag.TagScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.hg.HgUtils;
  import org.apache.maven.scm.provider.hg.command.HgCommandConstants;
  import org.apache.maven.scm.provider.hg.command.HgConsumer;
  import org.apache.maven.scm.provider.hg.command.inventory.HgListConsumer;
  import org.apache.maven.scm.provider.hg.repository.HgScmProviderRepository;
  
  /**
   * Tag
   *
   * @author <a href="mailto:ryan@darksleep.com">ryan daum</a>
   * @author Olivier Lamy
   *
   */
  public class HgTagCommand extends AbstractTagCommand implements Command {
  
      protected ScmResult executeTagCommand(
              ScmProviderRepository scmProviderRepository, ScmFileSet fileSet, String tag, String message)
              throws ScmException {
          return executeTagCommand(scmProviderRepository, fileSet, tag, new ScmTagParameters(message));
      }
  
      /**
       * {@inheritDoc}
       */
      protected ScmResult executeTagCommand(
              ScmProviderRepository scmProviderRepository,
              ScmFileSet fileSet,
              String tag,
              ScmTagParameters scmTagParameters)
              throws ScmException {
  
          if (tag == null || StringUtils.isEmpty(tag.trim())) {
              throw new ScmException("tag must be specified");
          }
  
          if (!fileSet.getFileList().isEmpty()) {
              throw new ScmException(
                      "This provider doesn't support tagging subsets of a directory : " + fileSet.getFileList());
          }
  
          File workingDir = fileSet.getBasedir();
  
          // build the command
          String[] tagCmd = new String[] {
              HgCommandConstants.TAG_CMD, HgCommandConstants.MESSAGE_OPTION, scmTagParameters.getMessage(), tag
          };
  
          // keep the command about in string form for reporting
          StringBuilder cmd = joinCmd(tagCmd);
          HgTagConsumer consumer = new HgTagConsumer();
          ScmResult result = HgUtils.execute(consumer, workingDir, tagCmd);
          HgScmProviderRepository repository = (HgScmProviderRepository) scmProviderRepository;
          if (result.isSuccess()) {
              // now push
              // Push to parent branch if any
  
              if (repository.isPushChanges()) {
                  if (!repository.getURI().equals(fileSet.getBasedir().getAbsolutePath())) {
                      String branchName = HgUtils.getCurrentBranchName(workingDir);
                      boolean differentOutgoingBranch = HgUtils.differentOutgoingBranchFound(workingDir, branchName);
  
                      String[] pushCmd = new String[] {
                          HgCommandConstants.PUSH_CMD,
                          differentOutgoingBranch ? HgCommandConstants.REVISION_OPTION + branchName : null,
                         repository.getURI()
                     };
 
                     result = HgUtils.execute(new HgConsumer(), fileSet.getBasedir(), pushCmd);
                 }
             }
         } else {
             throw new ScmException("Error while executing command " + cmd.toString());
         }
 
         // do an inventory to return the files tagged (all of them)
         String[] listCmd = new String[] {HgCommandConstants.INVENTORY_CMD};
         HgListConsumer listconsumer = new HgListConsumer();
         result = HgUtils.execute(listconsumer, fileSet.getBasedir(), listCmd);
         if (result.isSuccess()) {
             List<ScmFile> files = listconsumer.getFiles();
             List<ScmFile> fileList = new ArrayList<ScmFile>();
             for (ScmFile f : files) {
                 if (!f.getPath().endsWith(".hgtags")) {
                     fileList.add(new ScmFile(f.getPath(), ScmFileStatus.TAGGED));
                 }
             }
 
             return new TagScmResult(fileList, result);
         } else {
             throw new ScmException("Error while executing command " + cmd.toString());
         }
     }
 
     private StringBuilder joinCmd(String[] cmd) {
         StringBuilder result = new StringBuilder();
         for (int i = 0; i < cmd.length; i++) {
             String s = cmd[i];
             result.append(s);
             if (i < cmd.length - 1) {
                 result.append(" ");
             }
         }
         return result;
     }
 }