package org.apache.maven.scm.provider.git.gitexe.command.untag;

/*
 * 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 java.io.File;

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.gitexe.command.GitCommandLineUtils;
import org.apache.maven.scm.provider.git.repository.GitScmProviderRepository;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;

/** {@inheritDoc} */
public class GitUntagCommand
    extends AbstractUntagCommand
    implements GitCommand
{

    /** {@inheritDoc} */
    public ScmResult executeUntagCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                          ScmUntagParameters scmUntagParameters )
        throws ScmException
    {
        String tag = scmUntagParameters.getTag();
        if ( tag == null || StringUtils.isEmpty( tag.trim() ) )
        {
            throw new ScmException( "tag name must be specified" );
        }

        GitScmProviderRepository repository = (GitScmProviderRepository) repo;

        CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
        CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();

        int exitCode;

        Commandline clTag = createCommandLine( repository, fileSet.getBasedir(), tag );

        exitCode = GitCommandLineUtils.execute( clTag, stdout, stderr );
        if ( exitCode != 0 )
        {
            return new UntagScmResult( clTag.toString(), "The git-tag command failed.", stderr.getOutput(), false );
        }

        if ( repo.isPushChanges() )
        {
            // and now push the tag to the configured upstream repository
            Commandline clPush = createPushCommandLine( repository, fileSet, tag );

            exitCode = GitCommandLineUtils.execute( clPush, stdout, stderr );
            if ( exitCode != 0 )
            {
                return new UntagScmResult( clPush.toString(), "The git-push command failed.", stderr.getOutput(),
                                         false );
            }
        }

        return new UntagScmResult( clTag.toString() );
    }

    // ----------------------------------------------------------------------
    //
    // ----------------------------------------------------------------------

    public static Commandline createCommandLine( GitScmProviderRepository repository, File workingDirectory,
                                                 String tag )
    {
        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( workingDirectory, "tag" );

        cl.createArg().setValue( "-d" );
        cl.createArg().setValue( tag );

        return cl;
    }

    public static Commandline createPushCommandLine( GitScmProviderRepository repository, ScmFileSet fileSet,
                                                     String tag )
    {
        Commandline cl = GitCommandLineUtils.getBaseGitCommandLine( fileSet.getBasedir(), "push" );

        cl.createArg().setValue( "--delete" );
        cl.createArg().setValue( repository.getPushUrl() );
        cl.createArg().setValue( "refs/tags/" + tag );

        return cl;
    }

}
