/**

  * 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.awt.Desktop;

 import java.io.InputStream;

 import java.io.OutputStream;

 import java.io.Writer;

 import java.net.URI;

 import java.net.URL;

 import java.util.Enumeration;

 import org.apidesign.vm4brwsr.Bck2Brwsr;

 import org.glassfish.grizzly.PortRange;

 import org.glassfish.grizzly.http.server.HttpHandler;

 import org.glassfish.grizzly.http.server.HttpServer;

 import org.glassfish.grizzly.http.server.NetworkListener;

 import org.glassfish.grizzly.http.server.Request;

 import org.glassfish.grizzly.http.server.Response;

 import org.glassfish.grizzly.http.server.ServerConfiguration;

 /**

  * Lightweight server to launch Bck2Brwsr applications in real browser.

  */

 public class Bck2BrwsrLauncher {

     public static void main( String[] args ) throws Exception {

         HttpServer server = HttpServer.createSimpleServer(".", new PortRange(8080, 65535));

         final ClassLoader loader = Bck2BrwsrLauncher.class.getClassLoader();

         final ServerConfiguration conf = server.getServerConfiguration();

         conf.addHttpHandler(new Console(), "/console");

         conf.addHttpHandler(new VM(loader), "/bck2brwsr.js");

         conf.addHttpHandler(new Classes(loader), "/classes/");

         server.start();

         NetworkListener listener = server.getListeners().iterator().next();

         int port = listener.getPort();

         URI uri = new URI("http://localhost:" + port + "/console");

         try {

             Desktop.getDesktop().browse(uri);

         } catch (UnsupportedOperationException ex) {

             String[] cmd = { 

                 "xdg-open", uri.toString()

             };

             Runtime.getRuntime().exec(cmd).waitFor();

         }

         System.in.read();

     }

     private static class Console extends HttpHandler {

         public Console() {

         }

         @Override

         public void service(Request request, Response response) throws Exception {

             response.setContentType("text/html");

             OutputStream os = response.getOutputStream();

             InputStream is = Bck2BrwsrLauncher.class.getResourceAsStream("console.xhtml");

             for (;;) {

                 int ch = is.read();

                 if (ch == -1) {

                     break;

                 }

                 os.write(ch);

             }

         }

     }

     private static class VM extends HttpHandler {

         private final ClassLoader loader;

         public VM(ClassLoader loader) {

             this.loader = loader;

         }

         @Override

         public void service(Request request, Response response) throws Exception {

             response.setCharacterEncoding("UTF-8");

             response.setContentType("text/javascript");

             Bck2Brwsr.generate(response.getWriter(), loader);

         }

     }

     private static class Classes extends HttpHandler {

         private final ClassLoader loader;

         public Classes(ClassLoader loader) {

             this.loader = loader;

         }

         @Override

         public void service(Request request, Response response) throws Exception {

             String res = request.getHttpHandlerPath();

             if (res.startsWith("/")) {

                 res = res.substring(1);

             }

             Enumeration<URL> en = loader.getResources(res);

             URL u = null;

             while (en.hasMoreElements()) {

                 u = en.nextElement();

             }

             if (u == null) {

                 response.setError();

                 response.setDetailMessage("Can't find resource " + res);

             }

             response.setContentType("text/javascript");

             InputStream is = u.openStream();

             Writer w = response.getWriter();

             w.append("[");

             for (int i = 0;; i++) {

                 int b = is.read();

                 if (b == -1) {

                     break;

                 }

                 if (i > 0) {

                     w.append(", ");

                 }

                 if (i % 20 == 0) {

                     w.write("\n");

                 }

                 if (b > 127) {

                     b = b - 256;

                 }

                 w.append(Integer.toString(b));

             }

             w.append("\n]");

         }

     }

 }