/**

  * 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.launcher;

 import java.io.File;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.URL;

 import java.util.jar.JarFile;

 import org.apidesign.vm4brwsr.Bck2Brwsr;

 /**

  * Lightweight server to launch Bck2Brwsr applications and tests.

  * Supports execution in native browser as well as Java's internal 

  * execution engine.

  */

 final class Bck2BrwsrLauncher extends BaseHTTPLauncher {

     public Bck2BrwsrLauncher(String cmd) {

         super(cmd);

     }

     @Override

     String harnessResource() {

         return "org/apidesign/bck2brwsr/launcher/harness.xhtml";

     }

     @Override

     String compileJar(JarFile jar) throws IOException {

         return CompileCP.compileJAR(jar);

     }

     @Override String compileFromClassPath(URL f) {

         try {

             return CompileCP.compileFromClassPath(f);

         } catch (Exception ex) {

             ex.printStackTrace();

             return null;

         }

     }

     @Override

     void generateBck2BrwsrJS(StringBuilder sb, final Res loader) throws IOException {

         class R implements Bck2Brwsr.Resources {

             @Override

             public InputStream get(String resource) throws IOException {

                 return loader.get(resource).openStream();

             }

         }

         Bck2Brwsr.generate(sb, new R());

         sb.append(

               "(function WrapperVM(global) {"

             + "  function ldCls(res) {\n"

             + "    var request = new XMLHttpRequest();\n"

             + "    request.open('GET', '/classes/' + res, false);\n"

             + "    request.send();\n"

             + "    if (request.status !== 200) return null;\n"

             + "    var arr = eval(request.responseText);\n"

             + "    return arr;\n"

             + "  }\n"

             + "  var prevvm = global.bck2brwsr;\n"

             + "  global.bck2brwsr = function() {\n"

             + "    var args = Array.prototype.slice.apply(arguments);\n"

             + "    args.unshift(ldCls);\n"

             + "    return prevvm.apply(null, args);\n"

             + "  };\n"

             + "  global.bck2brwsr.registerExtension = prevvm.registerExtension;\n"

             + "})(this);\n"

         );

     }

 }