package org.apache.maven.scm.provider.svn;

/*
 * 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 junit.framework.Assert;
import org.apache.maven.scm.ScmTestCase;
import org.codehaus.plexus.util.FileUtils;
import org.codehaus.plexus.util.Os;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.cli.CommandLineException;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.Commandline;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;

/**
 * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
 * @version $Id$
 */
public final class SvnScmTestUtils
{
    /** 'svn' command line */
    public static final String SVN_COMMAND_LINE = "svn";

    /** 'svnadmin' command line */
    public static final String SVNADMIN_COMMAND_LINE = "svnadmin";

    private SvnScmTestUtils()
    {
    }

    public static void initializeRepository( File repositoryRoot )
        throws Exception
    {
        if ( repositoryRoot.exists() )
        {
            FileUtils.deleteDirectory( repositoryRoot );
        }
        
        Assert.assertFalse( "repositoryRoot still exists", repositoryRoot.exists() );

        Assert.assertTrue( "Could not make repository root directory: " + repositoryRoot.getAbsolutePath(),
                           repositoryRoot.mkdirs() );

        ScmTestCase.execute( repositoryRoot.getParentFile(), SVNADMIN_COMMAND_LINE, "create " + repositoryRoot.getName() );

        loadSvnDump( repositoryRoot,
                     new SvnScmTestUtils().getClass().getClassLoader().getResourceAsStream( "tck/tck.dump" ) );
    }

    public static void initializeRepository( File repositoryRoot, File dump )
        throws Exception
    {
        if ( repositoryRoot.exists() )
        {
            FileUtils.deleteDirectory( repositoryRoot );
        }

        Assert.assertTrue( "Could not make repository root directory: " + repositoryRoot.getAbsolutePath(),
                           repositoryRoot.mkdirs() );

        ScmTestCase.execute( repositoryRoot.getParentFile(), SVNADMIN_COMMAND_LINE, "create " + repositoryRoot.getName() );

        Assert.assertTrue( "The dump file doesn't exist: " + dump.getAbsolutePath(), dump.exists() );

        loadSvnDump( repositoryRoot, new FileInputStream( dump ) );
    }

    private static void loadSvnDump( File repositoryRoot, InputStream dumpStream )
        throws Exception
    {
        Commandline cl = new Commandline();

        cl.setExecutable( SVNADMIN_COMMAND_LINE );

        cl.setWorkingDirectory( repositoryRoot.getParentFile().getAbsolutePath() );

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

        cl.createArg().setValue( repositoryRoot.getAbsolutePath() );

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

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

        int exitValue = CommandLineUtils.executeCommandLine( cl, dumpStream, stdout, stderr );

        if ( exitValue != 0 )
        {
            System.err.println( "-----------------------------------------" );
            System.err.println( "Command line: " + cl );
            System.err.println( "Working directory: " + cl.getWorkingDirectory() );
            System.err.println( "-----------------------------------------" );
            System.err.println( "Standard output: " );
            System.err.println( "-----------------------------------------" );
            System.err.println( stdout.getOutput() );
            System.err.println( "-----------------------------------------" );

            System.err.println( "Standard error: " );
            System.err.println( "-----------------------------------------" );
            System.err.println( stderr.getOutput() );
            System.err.println( "-----------------------------------------" );
        }

        if ( exitValue != 0 )
        {
            Assert.fail( "Exit value wasn't 0, was:" + exitValue );
        }
    }

    public static String getScmUrl( File repositoryRootFile )
        throws CommandLineException
    {
        String repositoryRoot = repositoryRootFile.getAbsolutePath();

        // TODO: it'd be great to build this into CommandLineUtils somehow
        // TODO: some way without a custom cygwin sys property?
        if ( "true".equals( System.getProperty( "cygwin" ) ) )
        {
            Commandline cl = new Commandline();

            cl.setExecutable( "cygpath" );

            cl.createArg().setValue( "--unix" );

            cl.createArg().setValue( repositoryRoot );

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

            int exitValue = CommandLineUtils.executeCommandLine( cl, stdout, null );

            if ( exitValue != 0 )
            {
                throw new CommandLineException( "Unable to convert cygwin path, exit code = " + exitValue );
            }

            repositoryRoot = stdout.getOutput().trim();
        }
        else if ( Os.isFamily( "windows" ) )
        {
            repositoryRoot = "/" + StringUtils.replace( repositoryRoot, "\\", "/" );
        }

        return "scm:svn:file://" + repositoryRoot;
    }
}