package org.apache.maven.scm.provider.git.jgit.command.remoteinfo;
   
   /*
    * 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.
   */
  
  import org.apache.maven.scm.CommandParameters;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.remoteinfo.AbstractRemoteInfoCommand;
  import org.apache.maven.scm.command.remoteinfo.RemoteInfoScmResult;
  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.JGitTransportConfigCallback;
  import org.apache.maven.scm.provider.git.jgit.command.JGitUtils;
  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.LsRemoteCommand;
  import org.eclipse.jgit.lib.Ref;
  import org.eclipse.jgit.lib.Repository;
  import org.eclipse.jgit.transport.CredentialsProvider;
  import org.slf4j.Logger;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.function.BiFunction;
  
  /**
   * @author Dominik Bartholdi (imod)
   * @since 1.9
   */
  public class JGitRemoteInfoCommand
      extends AbstractRemoteInfoCommand
      implements GitCommand
  {
  
      private BiFunction<GitScmProviderRepository, Logger, ScmProviderAwareSshdSessionFactory> sshSessionFactorySupplier;
  
      public JGitRemoteInfoCommand()
      {
          sshSessionFactorySupplier = ScmProviderAwareSshdSessionFactory::new;
      }
  
      public void setSshSessionFactorySupplier(
          BiFunction<GitScmProviderRepository, Logger, ScmProviderAwareSshdSessionFactory> sshSessionFactorySupplier )
      {
          this.sshSessionFactorySupplier = sshSessionFactorySupplier;
      }
  
      @Override
      public RemoteInfoScmResult executeRemoteInfoCommand( ScmProviderRepository repository, ScmFileSet fileSet,
                                                           CommandParameters parameters )
          throws ScmException
      {
  
          GitScmProviderRepository repo = (GitScmProviderRepository) repository;
          Git git = null;
          try
          {
              git = JGitUtils.openRepo( fileSet.getBasedir() );
              CredentialsProvider credentials = JGitUtils.getCredentials( repo );
  
              LsRemoteCommand lsCommand =
                  git.lsRemote().setRemote( repo.getPushUrl() ).setCredentialsProvider( credentials )
                          .setTransportConfigCallback(
                              new JGitTransportConfigCallback( sshSessionFactorySupplier.apply( repo, logger ) )
                          );
  
              Map<String, String> tag = new HashMap<>();
              Collection<Ref> allTags = lsCommand.setHeads( false ).setTags( true ).call();
              for ( Ref ref : allTags )
              {
                  tag.put( Repository.shortenRefName( ref.getName() ), ref.getObjectId().name() );
              }
  
              Map<String, String> heads = new HashMap<>();
              Collection<Ref> allHeads = lsCommand.setHeads( true ).setTags( false ).call();
              for ( Ref ref : allHeads )
              {
                  heads.put( Repository.shortenRefName( ref.getName() ), ref.getObjectId().name() );
              }
  
             return new RemoteInfoScmResult( "JGit remoteinfo", heads, tag );
         }
         catch ( Exception e )
         {
             throw new ScmException( "JGit remoteinfo failure!", e );
         }
         finally
         {
             JGitUtils.closeRepo( git );
         }
     }
 }