package org.apache.maven.scm.provider.hg.command.tag;

/*
 * 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 java.util.ArrayList;
import java.util.List;

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;
import org.codehaus.plexus.util.StringUtils;

/**
 * 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( getLogger() );
        ScmResult result = HgUtils.execute( consumer, getLogger(), 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( getLogger(), workingDir );
                    boolean differentOutgoingBranch =
                        HgUtils.differentOutgoingBranchFound( getLogger(), workingDir, branchName );

                    String[] pushCmd = new String[]{ HgCommandConstants.PUSH_CMD,
                        differentOutgoingBranch ? HgCommandConstants.REVISION_OPTION + branchName : null,
                        repository.getURI() };

                    result =
                        HgUtils.execute( new HgConsumer( getLogger() ), getLogger(), 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( getLogger() );
        result = HgUtils.execute( listconsumer, getLogger(), 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;
    }
}