/*
 * 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.phase04processclasses;

import com.jayway.maven.plugins.android.AbstractAndroidMojo;
import com.jayway.maven.plugins.android.CommandExecutor;
import com.jayway.maven.plugins.android.ExecutionException;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.codehaus.plexus.util.IOUtil;

import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

/**
 * Converts compiled Java classes to the Android dex format.
 * @goal dex
 * @phase process-classes
 * @author hugo.josefson@jayway.com
 */
public class DexMojo extends AbstractAndroidMojo {

    /**
     * Extra JVM Arguments
     *
     * @parameter
     * @optional
     */
    private String[] jvmArguments;

    public void execute() throws MojoExecutionException, MojoFailureException {

        CommandExecutor executor = CommandExecutor.Factory.createDefaultCommmandExecutor();
        executor.setLogger(this.getLog());

        File outputFile = new File(project.getBuild().getDirectory() + File.separator + "classes.dex");
        File inputFile  = new File(project.getBuild().getDirectory() + File.separator + project.getBuild().getFinalName() + ".jar");

        // Unpack all dependent and main classes
        File classesOutputDirectory = unpackClasses(inputFile);

        List<String> commands = new ArrayList<String>();
        if (jvmArguments != null){
            for (String jvmArgument : jvmArguments) {
                if (jvmArgument != null){
                    if (jvmArgument.startsWith("-")){
                        jvmArgument = jvmArgument.substring(1);
                    }
                    commands.add("-J" + jvmArgument);
                }
            }
        }
        commands.add("--dex");
        commands.add("--output=" + outputFile.getAbsolutePath());
        commands.add(classesOutputDirectory.getAbsolutePath());
        getLog().info(getAndroidSdk().getPathForTool("dx") + " " + commands.toString());
        try {
            executor.executeCommand(getAndroidSdk().getPathForTool("dx"), commands, project.getBasedir(), false);
        } catch (ExecutionException e) {
            throw new MojoExecutionException("", e);
        }

        projectHelper.attachArtifact(project, "jar", project.getArtifact().getClassifier(), inputFile);
    }

    private File unpackClasses(File inputFile) throws MojoExecutionException {
        File outputDirectory = new File(project.getBuild().getDirectory(), "android-classes");
        for (Artifact artifact : (List<Artifact>) project.getCompileArtifacts()) {
            if (artifact.getGroupId().equals("android")) {
                continue;
            }

            if(artifact.getFile().isDirectory())  {
                throw new MojoExecutionException("Dependent artifact is directory: Directory = " + artifact.getFile().getAbsolutePath());
            }

            try {
                unjar(new JarFile(artifact.getFile()), outputDirectory);
            } catch (IOException e) {
                throw new MojoExecutionException("IOException while unjarring " + artifact.getFile().getAbsolutePath() + " into " + outputDirectory.getAbsolutePath(), e);
            }
        }

        try {
            unjar(new JarFile(inputFile), outputDirectory);
        } catch (IOException e) {
            throw new MojoExecutionException("IOException while unjarring " + inputFile.getAbsolutePath() + " into " + outputDirectory.getAbsolutePath(), e);
        }
        return outputDirectory;
    }

    private void unjar(JarFile jarFile, File outputDirectory) throws IOException {
        for (Enumeration en = jarFile.entries(); en.hasMoreElements();) {
            JarEntry entry = (JarEntry) en.nextElement();
            File entryFile = new File(outputDirectory, entry.getName());
            if (!entryFile.getParentFile().exists() && !entry.getName().startsWith("META-INF")) {
                entryFile.getParentFile().mkdirs();
            }
            if (!entry.isDirectory() && entry.getName().endsWith(".class")) {
                final InputStream in = jarFile.getInputStream(entry);
                try {
                    final OutputStream out = new FileOutputStream(entryFile);
                    try {
                    IOUtil.copy(in, out);
                    } finally {
                        closeQuietly(out);
                    }
                } finally {
                    closeQuietly(in);
                }
            }
        }
    }

    private void closeQuietly(final Closeable c) {
        try {
            c.close();
        } catch (Exception ex) {
            getLog().warn("Failed to close closeable " + c, ex);
        }
    }
}

@@ -888,32 +888,71 @@
 tionException;%0D%0A
+import org.apache.commons.io.IOUtils;%0D%0A
 import org.apach
@@ -5393,16 +5393,20 @@
         
+    
 IOUtil.c
@@ -5416,24 +5416,24 @@
 (in, out);%0D%0A
-
             
@@ -5469,32 +5469,40 @@
                 
+IOUtils.
 closeQuietly(out
@@ -5577,16 +5577,24 @@
         
+IOUtils.
 closeQui
@@ -5662,216 +5662,7 @@
 %0D%0A%0D%0A
-    private void closeQuietly(final Closeable c) %7B%0D%0A        try %7B%0D%0A            c.close();%0D%0A        %7D catch (Exception ex) %7B%0D%0A            getLog().warn(%22Failed to close closeable %22 + c, ex);%0D%0A        %7D%0D%0A    %7D%0D%0A
 %7D%0D%0A

Use Apache commons-io's IOUtils.closeQuitely instead of our own code.