/*
    * Copyright (C) 2009 Jayway AB
    * Copyright (C) 2007-2008 JVending Masa
    *
    * 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.
   */
  package com.jayway.maven.plugins.android.standalonemojos;
  
  import com.jayway.maven.plugins.android.AbstractAndroidMojo;
  import com.jayway.maven.plugins.android.CommandExecutor;
  import com.jayway.maven.plugins.android.common.JarHelper;
  import org.apache.commons.io.FileUtils;
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.jar.JarEntry;
  import java.util.jar.JarFile;
  
  /**
   * Unpack libraries code and dependencies into target.
   * <p/>
   * This can be useful for using the proguard maven plugin to provide the input jars. Although it is encouraged to use
   * the proguard mojo of the android maven plugin.
   *
   * @author hugo.josefson@jayway.com
   * @author Manfred Moser
   * @goal unpack
   * @requiresDependencyResolution compile
   */
  public class UnpackMojo extends AbstractAndroidMojo
  {
      /**
       * If true, the library will be unpacked only when outputDirectory doesn't
       * exist, i.e, a clean build for most cases.
       *
       * @parameter expression="${android.lazyLibraryUnpack}"
       * default-value="false"
       */
      private boolean lazyLibraryUnpack;
  
      public void execute() throws MojoExecutionException, MojoFailureException
      {
  
          CommandExecutor executor = CommandExecutor.Factory.createDefaultCommmandExecutor();
          executor.setLogger( this.getLog() );
  
          if ( generateApk )
          {
              // Unpack all dependent and main classes
              unpackClasses();
          }
      }
  
      private File unpackClasses() throws MojoExecutionException
      {
          File outputDirectory = new File( project.getBuild().getDirectory(), "android-classes" );
          if ( lazyLibraryUnpack && outputDirectory.exists() )
          {
              getLog().info( "skip library unpacking due to lazyLibraryUnpack policy" );
          }
          else
          {
              for ( Artifact artifact : getRelevantCompileArtifacts() )
              {
  
                  if ( artifact.getFile().isDirectory() )
                  {
                      try
                      {
                          FileUtils.copyDirectory( artifact.getFile(), outputDirectory );
                      }
                      catch ( IOException e )
                      {
                          throw new MojoExecutionException( "IOException while copying "
                                  + artifact.getFile().getAbsolutePath() + " into " + outputDirectory.getAbsolutePath()
                                  , e );
                      }
                  }
                  else
                  {
                      try
                      {
                          JarHelper.unjar( new JarFile( artifact.getFile() ), outputDirectory,
                                  new JarHelper.UnjarListener()
                                  {
                                      @Override
                                     public boolean include( JarEntry jarEntry )
                                     {
                                         return ! jarEntry.getName().startsWith( "META-INF" ) && jarEntry.getName()
                                                 .endsWith( ".class" );
                                     }
                                 } );
                     }
                     catch ( IOException e )
                     {
                         throw new MojoExecutionException( "IOException while unjarring "
                                 + artifact.getFile().getAbsolutePath() + " into " + outputDirectory.getAbsolutePath()
                                 , e );
                     }
                 }
 
             }
         }
 
         try
         {
             File sourceDirectory = new File( project.getBuild().getOutputDirectory() );
             FileUtils.copyDirectory( sourceDirectory, outputDirectory );
         }
         catch ( IOException e )
         {
             throw new MojoExecutionException( "IOException while copying " + sourceDirectory.getAbsolutePath()
                     + " into " + outputDirectory.getAbsolutePath(), e );
         }
         return outputDirectory;
     }
 
 }