/**

  * 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.tck;

 import java.io.ByteArrayInputStream;

 import java.io.Closeable;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.URL;

 import java.net.URLConnection;

 import java.util.Enumeration;

 import net.java.html.js.JavaScriptBody;

 import org.apidesign.bck2brwsr.vmtest.BrwsrTest;

 import org.apidesign.bck2brwsr.vmtest.Compare;

 import org.apidesign.bck2brwsr.vmtest.VMTest;

 import org.testng.annotations.Factory;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public class ResourcesTest {

     @Compare public String allManifests() throws Exception {

         Enumeration<URL> en = ClassLoader.getSystemResources("META-INF/MANIFEST.MF");

         assert en.hasMoreElements() : "Should have at least one manifest";

         String first = readString(en.nextElement().openStream());

         boolean different = false;

         int cnt = 1;

         while (en.hasMoreElements()) {

             URL url = en.nextElement();

             String now = readString(url.openStream());

             if (!first.equals(now)) {

                 different = true;

             }

             cnt++;

             if (cnt > 500) {

                 throw new IllegalStateException(

                     "Giving up. First manifest:\n" + first + 

                     "\nLast manifest:\n" + now

                 );

             }

         }

         assert different : "Not all manifests should look like first one:\n" + first;

         if (cnt > 40 && cnt < 50) {

             return "OK";

         } else {

             return "" + cnt;

         }

     }

     @Compare public String readResourceAsStream() throws Exception {

         InputStream is = getClass().getResourceAsStream("Resources.txt");

         return readString(is);

     }

     @Compare public String readResourceViaXMLHttpRequest() throws Exception {

         return readResourceViaXHR("Resources.txt", null);

     }

     @BrwsrTest public void xhrTestedInBrowser() throws Exception {

         boolean[] run = { false };

         readResourceViaXHR("Resources.txt", run);

         assert run[0] : "XHR really used in browser";

     }

     @Compare public String readBinaryResourceViaXMLHttpRequest() throws Exception {

         return readResourceViaXHR("0xfe", null);

     }

     private String readResourceViaXHR(final String res, boolean[] exec) throws IOException {

         URL url = getClass().getResource(res);

         URLConnection conn = url.openConnection();

         String java = readBytes(url.openStream());

         String java2 = readBytes(conn.getInputStream());

         assert java.equals(java2) : "Java:\n" + java + "\nConn:\n" + java2;

         URL url2 = conn.getURL();

         String java3 = readBytes(url.openStream());

         assert java.equals(java3) : "Java:\n" + java + "\nConnURL:\n" + java3;

         byte[] xhr = readXHR(url2.toExternalForm());

         if (xhr != null) {

             if (exec != null) {

                 exec[0] = true;

             }

             String s = readBytes(new ByteArrayInputStream(xhr));

             assert java.equals(s) : "Java:\n" + java + "\nXHR:\n" + s;

             assert conn instanceof Closeable : "Can be closed";

             Closeable c = (Closeable) conn;

             c.close();

             byte[] xhr2 = null;

             try {

                 xhr2 = readXHR(url2.toExternalForm());

             } catch (Throwable t) {

                 // OK, expecting error

             }

             assert xhr2 == null : "Cannot read the URL anymore";

         }

         return java;

     }

     @JavaScriptBody(args = { "url" }, body =

         "if (typeof XMLHttpRequest === 'undefined') return null;\n" +

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

         "xhr.overrideMimeType('text\\/plain; charset=x-user-defined');\n" +

         "xhr.open('GET', url, false);\n" +

         "xhr.send();\n" +

         "if (xhr.status !== 200) throw 'Status: ' + xhr.status + ' ' + xhr.statusText;\n" +

         "var ret = []\n" +

         "for (var i = 0; i < xhr.responseText.length; i++) {\n" +

         "  var b = xhr.responseText.charCodeAt(i) & 0xff;\n" +

         "  if (b > 127) b -= 256;\n" +

         "  ret.push(b);\n" +

         "}\n" +

         "return ret;\n"

     )

     private static byte[] readXHR(String url) {

         return null;

     }

     @Compare public String readResourceViaConnection() throws Exception {

         final URL url = getClass().getResource("Resources.txt");

         String str = url.toExternalForm();

         int idx = str.indexOf("org/apidesign/bck2brwsr/tck");

         assert idx >= 0 : "Package name found in the URL name: " + str;

         InputStream is = url.openConnection().getInputStream();

         return readString(is);

     }

     private String readString(InputStream is) throws IOException {

         StringBuilder sb = new StringBuilder();

         byte[] b = new byte[512];

         for (;;) { 

             int len = is.read(b);

             if (len == -1) {

                 return sb.toString();

             }

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

                 sb.append((char)b[i]);

             }

         }

     }

     private String readBytes(InputStream is) throws IOException {

         StringBuilder sb = new StringBuilder();

         byte[] b = new byte[512];

         for (;;) { 

             int len = is.read(b);

             if (len == -1) {

                 return sb.toString();

             }

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

                 sb.append((int)b[i]).append(" ");

             }

         }

     }

     @Compare public String readResourceAsStreamFromClassLoader() throws Exception {

         InputStream is = getClass().getClassLoader().getResourceAsStream("org/apidesign/bck2brwsr/tck/Resources.txt");

         return readString(is);

     }

     @Compare public String toURIFromURL() throws Exception {

         URL u = new URL("http://apidesign.org");

         return u.toURI().toString();

     }

     @Factory public static Object[] create() {

         return VMTest.create(ResourcesTest.class);

     }

 }