package org.apache.maven.scm;

/*
 * 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.manager.ScmManager;
import org.apache.maven.scm.repository.ScmRepository;
import org.codehaus.plexus.ContainerConfiguration;
import org.codehaus.plexus.PlexusConstants;
import org.codehaus.plexus.util.FileUtils;
import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.codehaus.plexus.util.cli.CommandLineUtils.StringStreamConsumer;
import org.codehaus.plexus.util.cli.Commandline;
import org.junit.Before;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeTrue;

/**
 * Base class for all SCM tests. Consumers will typically
 * extend this class while tck test would extend ScmTckTestCase.
 * <br>
 * This class basically defines default locations for the
 * test environment and implements convenience methods.
 *
 * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
 *
 */
public abstract class ScmTestCase
    extends PlexusJUnit4TestSupport
{
    protected static final TimeZone GMT_TIME_ZONE = TimeZone.getTimeZone( "GMT" );

    private static boolean debugExecute;

    private ScmManager scmManager;

    @Before
    @Override
    public void setUp()
        throws Exception
    {
        super.setUp();

        deleteDirectory( getRepositoryRoot() );
        assertFalse( getRepositoryRoot().exists() );
        deleteDirectory( getWorkingCopy() );
        assertFalse( getWorkingCopy().exists() );
        deleteDirectory( getWorkingDirectory() );
        assertFalse( getWorkingDirectory().exists() );
        deleteDirectory( getAssertionCopy() );
        assertFalse( getAssertionCopy().exists() );
        deleteDirectory( getUpdatingCopy() );
        assertFalse( getUpdatingCopy().exists() );

        scmManager = null;
    }

    @Override
    protected void customizeContainerConfiguration( final ContainerConfiguration configuration )
    {
        configuration.setClassPathScanning( PlexusConstants.SCANNING_INDEX ).setAutoWiring( true );
    }

    /**
     * @return default location of the test read/write repository
     */
    protected File getRepositoryRoot()
    {
        return PlexusJUnit4TestSupport.getTestFile( "target/scm-test/repository" );
    }

    /**
     * @return Location of the revisioned (read only) repository
     */
    protected File getRepository()
    {
        return PlexusJUnit4TestSupport.getTestFile( "/src/test/repository" );
    }

    /**
     * @return location of the working copy (always checkout)
     */
    protected File getWorkingCopy()
    {
        return PlexusJUnit4TestSupport.getTestFile( "target/scm-test/working-copy" );
    }

    /**
     * Legacy method - same as getWorkingCopy()
     *
     * @return location of the working copy (always checkout)
     */
    protected File getWorkingDirectory()
    {
        return getWorkingCopy();
    }

    /**
     * @return default location for doing assertions on a working tree
     */
    protected File getAssertionCopy()
    {
        return PlexusJUnit4TestSupport.getTestFile( "target/scm-test/assertion-copy" );
    }

    /**
     * @return default location for doing update operations on a working tree
     */
    protected File getUpdatingCopy()
    {
        return PlexusJUnit4TestSupport.getTestFile( "target/scm-test/updating-copy" );
    }

    protected ScmManager getScmManager()
        throws Exception
    {
        if ( scmManager == null )
        {
            scmManager = lookup( ScmManager.class );
        }

        return scmManager;
    }

    protected ScmRepository makeScmRepository( String scmUrl )
        throws Exception
    {
        return getScmManager().makeScmRepository( scmUrl );
    }

    public void assertPath( String expectedPath, String actualPath )
        throws Exception
    {
        assertEquals( expectedPath.replace( '\\', '/' ), actualPath.replace( '\\', '/' ) );
    }

    protected void assertFile( File root, String fileName )
        throws Exception
    {
        File file = new File( root, fileName );

        assertTrue( "Missing file: '" + file.getAbsolutePath() + "'.", file.exists() );

        assertTrue( "File isn't a file: '" + file.getAbsolutePath() + "'.", file.isFile() );

        String expected = fileName;

        String actual = FileUtils.fileRead( file );

        assertEquals( "The file doesn't contain the expected contents. File: " + file.getAbsolutePath(), expected,
                      actual );
    }

    protected void assertResultIsSuccess( ScmResult result )
    {
        if ( result.isSuccess() )
        {
            return;
        }

        printOutputError( result );

        fail( "The command result success flag was false." );
    }

    protected void printOutputError( ScmResult result )
    {
        System.err.println( "----------------------------------------------------------------------" );
        System.err.println( "Provider message" );
        System.err.println( "----------------------------------------------------------------------" );
        System.err.println( result.getProviderMessage() );
        System.err.println( "----------------------------------------------------------------------" );

        System.err.println( "----------------------------------------------------------------------" );
        System.err.println( "Command output" );
        System.err.println( "----------------------------------------------------------------------" );
        System.err.println( result.getCommandOutput() );
        System.err.println( "----------------------------------------------------------------------" );
    }

    protected ScmFileSet getScmFileSet()
    {
        return new ScmFileSet( getWorkingCopy() );
    }

    protected static void setDebugExecute( boolean debugExecute )
    {
        ScmTestCase.debugExecute = debugExecute;
    }

    /**
     * Execute the command line
     *
     * @param workingDirectory not null
     * @param executable       not null, should be a system command
     * @param arguments        not null
     * @throws Exception if any
     * @see CommandLineUtils#executeCommandLine(Commandline, org.codehaus.plexus.util.cli.StreamConsumer,
     *      org.codehaus.plexus.util.cli.StreamConsumer)
     */
    public static void execute( File workingDirectory, String executable, String arguments )
        throws Exception
    {
        Commandline cl = new Commandline();

        cl.setExecutable( executable );

        cl.setWorkingDirectory( workingDirectory.getAbsolutePath() );

        cl.addArguments( CommandLineUtils.translateCommandline( arguments ) );

        StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();

        StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();

        System.out.println( "Test command line: " + cl );

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

        if ( debugExecute || 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 )
        {
            fail( "Exit value wasn't 0, was:" + exitValue );
        }
    }

    protected static void makeDirectory( File basedir, String fileName )
    {
        File dir = new File( basedir, fileName );

        if ( !dir.exists() )
        {
            assertTrue( dir.mkdirs() );
        }
    }

    protected static void makeFile( File basedir, String fileName )
        throws IOException
    {
        makeFile( basedir, fileName, fileName );
    }

    public static void makeFile( File basedir, String fileName, String contents )
        throws IOException
    {
        File file = new File( basedir, fileName );

        File parent = file.getParentFile();

        if ( !parent.exists() )
        {
            assertTrue( parent.mkdirs() );
        }

        try ( FileWriter writer = new FileWriter( file ) )
        {
            writer.write( contents );
        }
    }

    protected void deleteDirectory( File directory )
        throws IOException
    {
        FileUtils.deleteDirectory( directory );
    }

    public static Date getDate( int year, int month, int day )
    {
        return getDate( year, month, day, 0, 0, 0, null );
    }

    protected static Date getDate( int year, int month, int day, TimeZone tz )
    {
        return getDate( year, month, day, 0, 0, 0, tz );
    }

    protected static Date getDate( int year, int month, int day, int hourOfDay, int minute, int second, TimeZone tz )
    {
        Calendar cal = Calendar.getInstance();

        if ( tz != null )
        {
            cal.setTimeZone( tz );
        }
        cal.set( year, month, day, hourOfDay, minute, second );
        cal.set( Calendar.MILLISECOND, 0 );

        return cal.getTime();
    }

    public void assertCommandLine( String expectedCommand, File expectedWorkingDirectory, Commandline actualCommand )
        throws IOException
    {
        Commandline cl = new Commandline( expectedCommand );
        if ( expectedWorkingDirectory != null )
        {
            cl.setWorkingDirectory( expectedWorkingDirectory.getAbsolutePath() );
        }
        String expectedCommandLineAsExecuted = StringUtils.join( cl.getShellCommandline(), " " );
        String actualCommandLineAsExecuted = StringUtils.join( actualCommand.getShellCommandline(), " " );
        assertEquals( expectedCommandLineAsExecuted, actualCommandLineAsExecuted );
    }

    public static void checkScmPresence( String scmProviderCommand )
    {
        assumeTrue( "Skipping tests because the required command '" + scmProviderCommand + "' is not available.",
            ScmTestCase.isSystemCmd( scmProviderCommand ) );
    }

    /**
     * @param cmd the executable to run, not null.
     * @return true if and only if the command is on the path
     */
    public static boolean isSystemCmd( String cmd )
    {
        try
        {
            Runtime.getRuntime().exec( cmd );

            return true;
        }
        catch ( IOException e )
        {
            return false;
        }
    }

    public static void printSystemCmdUnavail( String cmd, String testName )
    {
        System.err.printf( "'%s' is not a system command. Ignored %s.%n", cmd, testName );
    }
}