/*
 * 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.codehaus.mojo.archetypeng.mojos;

import org.apache.maven.archiver.MavenArchiveConfiguration;
import org.apache.maven.archiver.MavenArchiver;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.project.MavenProject;

import org.codehaus.plexus.archiver.jar.JarArchiver;

import java.io.File;

/**
 * @author           rafale
 * @goal             jar
 * @phase            package
 * @requiresProject
 */
public class JarMojo
extends AbstractMojo
{
    /**
     * Directory containing the classes.
     *
     * @parameter  expression="${project.build.outputDirectory}"
     * @required
     */
    private File archetypeDirectory;

    /**
     * The maven archive configuration to use.
     *
     * <p>See <a
     * href="http://maven.apache.org/ref/current/maven-archiver/apidocs/org/apache/maven/archiver/MavenArchiveConfiguration.html">
     * the Javadocs for MavenArchiveConfiguration</a>.</p>
     *
     * @parameter
     */
    private MavenArchiveConfiguration archive = new MavenArchiveConfiguration ();

    /**
     * Name of the generated JAR.
     *
     * @parameter  alias="jarName" expression="${project.build.finalName}"
     * @required
     */
    private String finalName;

    /**
     * The Jar archiver.
     *
     * @parameter  expression="${component.org.codehaus.plexus.archiver.Archiver#jar}"
     * @required
     */
    private JarArchiver jarArchiver;

    /**
     * Directory containing the generated JAR.
     *
     * @parameter  expression="${project.build.directory}"
     * @required
     */
    private File outputDirectory;

    /**
     * The maven project.
     *
     * @parameter  expression="${project}"
     * @required
     * @readonly
     */
    private MavenProject project;

    protected static File getJarFile ( File basedir, String finalName )
    {
        return new File ( basedir, finalName + ".jar" );
    }

    public void execute ()
    throws MojoExecutionException, MojoFailureException
    {
        File jarFile = createArchive ();
        project.getArtifact ().setFile ( jarFile );
    }

    private File createArchive ()
    throws MojoExecutionException
    {
        File jarFile = getJarFile ( outputDirectory, finalName );

        MavenArchiver archiver = new MavenArchiver ();

        archiver.setArchiver ( jarArchiver );

        archiver.setOutputFile ( jarFile );

        archive.setForced ( true );

        try
        {
            if ( !archetypeDirectory.exists () )
            {
                getLog ().warn ( "JAR will be empty - no content was marked for inclusion!" );
            }
            else
            {
                archiver.getArchiver ().addDirectory ( archetypeDirectory );
            }

            archiver.createArchive ( project, archive );

            return jarFile;
        }
        catch ( Exception e )
        {
            throw new MojoExecutionException ( "Error assembling JAR", e );
        }
    }
}