/**

  * Back 2 Browser Bytecode Translator

  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 2 of the License.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. Look for COPYING file in the top folder.

  * If not, see http://opensource.org/licenses/GPL-2.0.

  */

 package org.apidesign.bck2brwsr.mojo;

 import java.io.Closeable;

 import org.apache.maven.plugin.AbstractMojo;

 import java.io.File;

 import java.io.IOException;

 import java.net.MalformedURLException;

 import java.net.URL;

 import java.net.URLClassLoader;

 import java.util.ArrayList;

 import java.util.Collection;

 import java.util.List;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.model.Resource;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugins.annotations.LifecyclePhase;

 import org.apache.maven.plugins.annotations.Mojo;

 import org.apache.maven.plugins.annotations.Parameter;

 import org.apache.maven.plugins.annotations.ResolutionScope;

 import org.apache.maven.project.MavenProject;

 import org.apidesign.bck2brwsr.launcher.Launcher;

 /** Executes given HTML page in a browser. */

 @Mojo(

     name="brwsr",

     requiresDependencyResolution = ResolutionScope.RUNTIME,

     defaultPhase=LifecyclePhase.NONE

 )

 public class BrwsrMojo extends AbstractMojo {

     public BrwsrMojo() {

     }

     /** The identification of a launcher to use. Known values <code>fxbrwsr</code>, 

      * <code>bck2brwsr</code>, or 

      * name of an external process to execute.

      */

     @Parameter

     private String launcher;

     /** Resource to show as initial page */

     @Parameter

     private String startpage;

     @Parameter(defaultValue="${project}")

     private MavenProject prj;

     /** Root of the class files */

     @Parameter(defaultValue="${project.build.directory}/classes")

     private File classes;

     /** Root of all pages, and files, etc. */

     @Parameter

     private File directory;

     @Override

     public void execute() throws MojoExecutionException {

         if (startpage == null) {

             throw new MojoExecutionException("You have to provide a start page");

         }

         try {

             Closeable httpServer;

             if (directory != null) {

                 httpServer = Launcher.showDir(directory, startpage);

             } else {

                 URLClassLoader url = buildClassLoader(classes, prj.getArtifacts());

                 try {

                     for (Resource r : prj.getResources()) {

                         File f = new File(r.getDirectory(), startpage().replace('/', File.separatorChar));

                         if (f.exists()) {

                             System.setProperty("startpage.file", f.getPath());

                         }

                     }

                     httpServer = Launcher.showURL(launcher, url, startpage());

                 } catch (Exception ex) {

                     throw new MojoExecutionException("Can't open " + startpage(), ex);

                 }

             }

             System.in.read();

             httpServer.close();

         } catch (IOException ex) {

             throw new MojoExecutionException("Can't show the browser", ex);

         }

     }

     private String startpage() {

         return startpage;

     }

     private static URLClassLoader buildClassLoader(File root, Collection<Artifact> deps) throws MalformedURLException {

         List<URL> arr = new ArrayList<URL>();

         arr.add(root.toURI().toURL());

         for (Artifact a : deps) {

             final File f = a.getFile();

             if (f != null) {

                 arr.add(f.toURI().toURL());

             }

         }

         return new URLClassLoader(arr.toArray(new URL[0]), BrwsrMojo.class.getClassLoader());

     }

 }