/*
    * 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.git.jgit.command.untag;
  
  import java.util.Collection;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.ScmUntagParameters;
  import org.apache.maven.scm.command.untag.AbstractUntagCommand;
  import org.apache.maven.scm.command.untag.UntagScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.git.command.GitCommand;
  import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.transport.PushResult;
  import org.eclipse.jgit.transport.RefSpec;
  import org.eclipse.jgit.transport.RemoteRefUpdate;
  
  /** {@inheritDoc} */
  public class JGitUntagCommand extends AbstractUntagCommand implements GitCommand {
  
      @Override
      protected ScmResult executeUntagCommand(
              ScmProviderRepository repository, ScmFileSet fileSet, ScmUntagParameters scmUntagParameters)
              throws ScmException {
          String tagName = scmUntagParameters.getTag();
          if (tagName == null || StringUtils.isEmpty(tagName.trim())) {
              throw new ScmException("tag name must be specified");
          }
          String escapedTagName = tagName.trim().replace(' ', '_');
  
          Git git = null;
          try {
              git = JGitUtils.openRepo(fileSet.getBasedir());
  
              // delete the tag
              if (git.tagDelete().setTags(escapedTagName).call().isEmpty()) {
                  return new UntagScmResult("JGit tagDelete", "Failed to delete tag", "", false);
              }
  
              if (repository.isPushChanges()) {
                  // From https://stackoverflow.com/q/11892766/696632
                  RefSpec refSpec = new RefSpec().setSource(null).setDestination(Constants.R_TAGS + escapedTagName);
  
                  logger.info("push delete tag [" + escapedTagName + "] to remote...");
  
                  Iterable<PushResult> pushResultList =
                          JGitUtils.push(git, (GitScmProviderRepository) repository, refSpec);
                  if (logger.isInfoEnabled()) {
                      for (PushResult pushResult : pushResultList) {
                          Collection<RemoteRefUpdate> ru = pushResult.getRemoteUpdates();
                          for (RemoteRefUpdate remoteRefUpdate : ru) {
                              logger.info(remoteRefUpdate.getStatus() + " - " + remoteRefUpdate);
                          }
                      }
                  }
              }
  
              return new UntagScmResult("JGit tagDelete");
          } catch (Exception e) {
              throw new ScmException("JGit tagDelete failure!", e);
          } finally {
              JGitUtils.closeRepo(git);
          }
      }
  }