/*
    * 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.io.IOException;
  import java.util.Collection;
  import java.util.EnumSet;
  import java.util.Optional;
  import java.util.function.BiFunction;
  
  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.CustomizableSshSessionFactoryCommand;
  import org.apache.maven.scm.provider.git.jgit.command.JGitTransportConfigCallback;
  import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
  import org.apache.maven.scm.provider.git.jgit.command.PushException;
  import org.apache.maven.scm.provider.git.jgit.command.ScmProviderAwareSshdSessionFactory;
  import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
  import org.eclipse.jgit.api.Git;
  import org.eclipse.jgit.api.TransportConfigCallback;
  import org.eclipse.jgit.api.errors.GitAPIException;
  import org.eclipse.jgit.lib.Constants;
  import org.eclipse.jgit.transport.PushResult;
  import org.eclipse.jgit.transport.RefSpec;
  import org.eclipse.jgit.transport.RemoteRefUpdate;
  import org.slf4j.Logger;
  
  /**
   * {@inheritDoc}
   */
  public class JGitUntagCommand extends AbstractUntagCommand implements GitCommand, CustomizableSshSessionFactoryCommand {
  
      private BiFunction<GitScmProviderRepository, Logger, ScmProviderAwareSshdSessionFactory> sshSessionFactorySupplier;
  
      public JGitUntagCommand() {
          sshSessionFactorySupplier = ScmProviderAwareSshdSessionFactory::new;
      }
  
      @Override
      public void setSshSessionFactorySupplier(
              BiFunction<GitScmProviderRepository, Logger, ScmProviderAwareSshdSessionFactory>
                      sshSessionFactorySupplier) {
          this.sshSessionFactorySupplier = sshSessionFactorySupplier;
      }
  
      @Override
      protected ScmResult executeUntagCommand(
              ScmProviderRepository repository, ScmFileSet fileSet, ScmUntagParameters scmUntagParameters)
              throws ScmException {
          String tagName = scmUntagParameters.getTag();
          if (tagName == null || tagName.trim().isEmpty()) {
              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);
  
                  TransportConfigCallback transportConfigCallback = new JGitTransportConfigCallback(
                          sshSessionFactorySupplier.apply((GitScmProviderRepository) repository, logger));
  
                  logger.info("push delete tag [" + escapedTagName + "] to remote...");
  
                  Iterable<PushResult> pushResultList = JGitUtils.push(
                          git,
                          (GitScmProviderRepository) repository,
                          refSpec,
                         EnumSet.of(
                                 RemoteRefUpdate.Status.OK,
                                 RemoteRefUpdate.Status.UP_TO_DATE,
                                 RemoteRefUpdate.Status.NON_EXISTING),
                         Optional.of(transportConfigCallback));
                 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 (PushException e) {
             logger.debug("Failed to push tag deletion", e);
             return new UntagScmResult("JGit tagDelete", "Failed to push tag deletion: " + e.getMessage(), "", false);
         } catch (IOException | GitAPIException e) {
             throw new ScmException("JGit tagDelete failure!", e);
         } finally {
             JGitUtils.closeRepo(git);
         }
     }
 }