package org.mortbay.jetty.openspaces.plugin;

/*========================================================================
 * $Id:$
 * Copyright 2000-2008 Mort Bay Consulting Pty. Ltd.
 *------------------------------------------------------------------------
 * Licensed 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 java.io.File;
import java.io.IOException;
import java.util.Iterator;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.archiver.jar.JarArchiver;
import org.codehaus.plexus.util.FileUtils;

/* todo:
 * allow mechanism for specifying other artifacts to be included in the pu jar
 * artifact name that implies its a pu?
 * 
 */

/**
 * Simple plugin that takes a bundled war file, a pu.xml file and the jetty dependencies of this plugin
 * itself to create an artifact suitable for deployment with os:deploy
 * 
 * @goal generate-pu
 * @requiresDependencyResolution runtime
 * @phase package
 * @description Generates an openspaces PU for a war project
 */
public class JOSGeneratePUMojo extends AbstractMojo
{

    /**
     * @parameter expression="${project.build.directory}/${project.artifactId}-${project.version}.war"
     */
    private String warFile;
    
    /**
     * @parameter expression="src/main/openspaces/pu.xml"
     */
    private String puXMLFile;
    
    /**
     * @parameter expression="${project.build.directory}/${project.artifactId}-${project.version}-pu"
     */
    private String serverDirectory;
    
    /**
     * @parameter expression="${project.build.directory}/${project.artifactId}-${project.version}.jar"
     */
    private String artifactName;
    
    /** 
     * @parameter expression="${plugin.artifacts}" 
     */
    private java.util.List pluginArtifacts;
    
    /**
     * The Jar archiver.
     *
     * @parameter expression="${component.org.codehaus.plexus.archiver.Archiver#jar}"
     * @required
     */
    private JarArchiver jarArchiver;
    
    /**
     * 
     */    
	public void execute() throws MojoExecutionException, MojoFailureException 
	{
	    if ( puXMLFile == null || !FileUtils.fileExists( puXMLFile ) )
	    {
	        throw new MojoExecutionException( "missing pu.xml file" );
	    }
	        
	    if ( warFile == null || !FileUtils.fileExists( warFile ) )
	    {
	        throw new MojoExecutionException( "missing war file" );
	    }
	    
	    try
        {
	        String puTargetDir = serverDirectory + File.separator + "META-INF" + File.separator + "spring";
	        String libTargetDir = serverDirectory + File.separator + "lib";
	        
	        FileUtils.mkdir( serverDirectory );	        
	        FileUtils.mkdir( puTargetDir );
	        FileUtils.mkdir( libTargetDir );
	        
            FileUtils.copyFileToDirectory( new File( puXMLFile ), new File( puTargetDir ) );
            FileUtils.copyFileToDirectory( new File( warFile ), new File( serverDirectory ) );
            
            
             for (Iterator artifactIterator = pluginArtifacts.iterator(); artifactIterator.hasNext();) 
             {
                Artifact artifact = (Artifact) artifactIterator.next();
                if (artifact.getGroupId().equals("org.mortbay.jetty") ) 
                {
                    FileUtils.copyFileToDirectory( artifact.getFile().getPath(), libTargetDir );
                }
             }
             
             jarArchiver.addDirectory( new File(serverDirectory) );
             jarArchiver.setDestFile( new File(artifactName) );
             jarArchiver.createArchive();
        }
        catch ( IOException ioe )
        {
            throw new MojoExecutionException( "unable to assemble",ioe );
        }
        catch ( ArchiverException ae )
        {
            throw new MojoExecutionException( "unable to assembly jar", ae );
        }
	}
}