/*
 * 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.svn.svnexe.command.export;

import java.io.File;

import org.apache.commons.lang3.StringUtils;
import org.apache.maven.scm.ScmBranch;
import org.apache.maven.scm.ScmException;
import org.apache.maven.scm.ScmFileSet;
import org.apache.maven.scm.ScmRevision;
import org.apache.maven.scm.ScmTag;
import org.apache.maven.scm.ScmVersion;
import org.apache.maven.scm.command.export.AbstractExportCommand;
import org.apache.maven.scm.command.export.ExportScmResult;
import org.apache.maven.scm.command.export.ExportScmResultWithRevision;
import org.apache.maven.scm.provider.ScmProviderRepository;
import org.apache.maven.scm.provider.svn.SvnCommandUtils;
import org.apache.maven.scm.provider.svn.SvnTagBranchUtils;
import org.apache.maven.scm.provider.svn.command.SvnCommand;
import org.apache.maven.scm.provider.svn.repository.SvnScmProviderRepository;
import org.apache.maven.scm.provider.svn.svnexe.command.SvnCommandLineUtils;
import org.apache.maven.scm.provider.svn.svnexe.command.update.SvnUpdateConsumer;
import org.codehaus.plexus.util.Os;
import org.codehaus.plexus.util.cli.CommandLineException;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;

/**
 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
 *
 */
public class SvnExeExportCommand extends AbstractExportCommand implements SvnCommand {
    /** {@inheritDoc} */
    protected ExportScmResult executeExportCommand(
            ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion version, String outputDirectory)
            throws ScmException {

        if (outputDirectory == null) {
            outputDirectory = fileSet.getBasedir().getAbsolutePath();
        }

        SvnScmProviderRepository repository = (SvnScmProviderRepository) repo;

        String url = repository.getUrl();

        if (version != null && StringUtils.isNotEmpty(version.getName())) {
            if (version instanceof ScmTag) {
                url = SvnTagBranchUtils.resolveTagUrl(repository, (ScmTag) version);
            } else if (version instanceof ScmBranch) {
                url = SvnTagBranchUtils.resolveBranchUrl(repository, (ScmBranch) version);
            }
        }

        url = SvnCommandUtils.fixUrl(url, repository.getUser());

        Commandline cl =
                createCommandLine((SvnScmProviderRepository) repo, fileSet.getBasedir(), version, url, outputDirectory);

        SvnUpdateConsumer consumer = new SvnUpdateConsumer(fileSet.getBasedir());

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

        if (logger.isInfoEnabled()) {
            logger.info("Executing: " + SvnCommandLineUtils.cryptPassword(cl));

            if (cl.getWorkingDirectory() != null && Os.isFamily(Os.FAMILY_WINDOWS)) {
                logger.info("Working directory: " + cl.getWorkingDirectory().getAbsolutePath());
            }
        }

        int exitCode;

        try {
            exitCode = SvnCommandLineUtils.execute(cl, consumer, stderr);
        } catch (CommandLineException ex) {
            throw new ScmException("Error while executing command.", ex);
        }

        if (exitCode != 0) {
            return new ExportScmResult(cl.toString(), "The svn command failed.", stderr.getOutput(), false);
        }

        return new ExportScmResultWithRevision(
                cl.toString(), consumer.getUpdatedFiles(), String.valueOf(consumer.getRevision()));
    }

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

    public static Commandline createCommandLine(
            SvnScmProviderRepository repository,
            File workingDirectory,
            ScmVersion version,
            String url,
            String outputSirectory) {
        if (version != null && StringUtils.isEmpty(version.getName())) {
            version = null;
        }

        Commandline cl = SvnCommandLineUtils.getBaseSvnCommandLine(workingDirectory, repository);

        cl.createArg().setValue("export");

        if (version != null && StringUtils.isNotEmpty(version.getName())) {
            if (version instanceof ScmRevision) {
                cl.createArg().setValue("-r");

                cl.createArg().setValue(version.getName());
            }
        }

        // support exporting to an existing directory
        cl.createArg().setValue("--force");

        cl.createArg().setValue(url + "@");

        if (outputSirectory != null && !outputSirectory.isEmpty()) {
            cl.createArg().setValue(outputSirectory + "@");
        }

        return cl;
    }
}