package org.apache.maven.shared.invoker;

/*
 * 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 static org.junit.Assert.assertEquals;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import org.codehaus.plexus.util.StringUtils;
import org.codehaus.plexus.util.cli.CommandLineUtils;
import org.junit.Test;

public class DefaultInvokerTest
{

    @Test
    public void testBuildShouldSucceed()
        throws IOException, MavenInvocationException, URISyntaxException
    {
        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "clean" );
        goals.add( "package" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 0, result.getExitCode() );
    }

    @Test
    public void testBuildShouldFail()
        throws IOException, MavenInvocationException, URISyntaxException
    {
        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "clean" );
        goals.add( "package" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 1, result.getExitCode() );
    }

    @Test
    public void testSpacePom()
        throws Exception
    {
        logTestStart();

        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        request.setPomFileName( "pom with spaces.xml" );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "clean" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 0, result.getExitCode() );
    }

    @Test
    public void testSpaceSettings()
        throws Exception
    {
        logTestStart();

        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        request.setUserSettingsFile( new File( basedir, "settings with spaces.xml" ) );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "validate" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 0, result.getExitCode() );
    }

    @Test
    public void testSpaceLocalRepo()
        throws Exception
    {
        logTestStart();

        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        request.setLocalRepositoryDirectory( new File( basedir, "repo with spaces" ) );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "validate" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 0, result.getExitCode() );
    }

    @Test
    public void testSpaceProperties()
        throws Exception
    {
        logTestStart();

        File basedir = getBasedirForBuild();

        Invoker invoker = newInvoker();

        InvocationRequest request = new DefaultInvocationRequest();
        request.setBaseDirectory( basedir );

        Properties props = new Properties();
        props.setProperty( "key", "value with spaces" );
        props.setProperty( "key with spaces", "value" );
        request.setProperties( props );

        request.setDebug( true );

        List<String> goals = new ArrayList<String>();
        goals.add( "validate" );

        request.setGoals( goals );

        InvocationResult result = invoker.execute( request );

        assertEquals( 0, result.getExitCode() );
    }

    private Invoker newInvoker()
        throws IOException
    {
        Invoker invoker = new DefaultInvoker();

        invoker.setMavenHome( findMavenHome() );

        InvokerLogger logger = new SystemOutLogger();
        logger.setThreshold( InvokerLogger.DEBUG );
        invoker.setLogger( logger );

        invoker.setLocalRepositoryDirectory( findLocalRepo() );

        return invoker;
    }

    private File findMavenHome()
        throws IOException
    {
        String mavenHome = System.getProperty( "maven.home" );

        if ( mavenHome == null )
        {
            mavenHome = CommandLineUtils.getSystemEnvVars().getProperty( "M2_HOME" );
        }

        if ( mavenHome == null )
        {
            throw new IllegalStateException( "Cannot find Maven application "
                + "directory. Either specify \'maven.home\' system property, or M2_HOME environment variable." );
        }

        return new File( mavenHome );
    }

    private File findLocalRepo()
    {
        String basedir = System.getProperty( "maven.repo.local", "" );

        if ( StringUtils.isNotEmpty( basedir ) )
        {
            return new File( basedir );
        }

        return null;
    }

    private File getBasedirForBuild()
        throws URISyntaxException
    {
        StackTraceElement element = new NullPointerException().getStackTrace()[1];
        String methodName = element.getMethodName();

        String dirName = StringUtils.addAndDeHump( methodName );

        ClassLoader cloader = Thread.currentThread().getContextClassLoader();
        URL dirResource = cloader.getResource( dirName );

        if ( dirResource == null )
        {
            throw new IllegalStateException( "Project: " + dirName + " for test method: " + methodName + " is missing." );
        }

        return new File( new URI( dirResource.toString() ).getPath() );
    }

    // this is just a debugging helper for separating unit test output...
    private void logTestStart()
    {
        NullPointerException npe = new NullPointerException();
        StackTraceElement element = npe.getStackTrace()[1];

        System.out.println( "Starting: " + element.getMethodName() );
    }

}