/**

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  * General Public License Version 2 only ("GPL") or the Common

  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

  * License. You can obtain a copy of the License at

  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

  * specific language governing permissions and limitations under the

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  * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the GPL Version 2 section of the License file that

  * accompanied this code. If applicable, add the following below the

  * License Header, with the fields enclosed by brackets [] replaced by

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  * "Portions Copyrighted [year] [name of copyright owner]"

  *

  * Contributor(s):

  *

  * The Original Software is NetBeans. The Initial Developer of the Original

  * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.

  *

  * If you wish your version of this file to be governed by only the CDDL

  * or only the GPL Version 2, indicate your decision by adding

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  * to extend the choice of license to its licensees as provided above.

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 package net.java.html.json.tests;

 import java.net.URI;

 import java.util.Collections;

 import java.util.Map;

 import java.util.ServiceLoader;

 import net.java.html.BrwsrCtx;

 import org.apidesign.html.json.tck.KnockoutTCK;

 /**

  *

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

  */

 public final class Utils {

     private static KnockoutTCK instantiatedTCK;

     private Utils() {

     }

     public static void registerTCK(KnockoutTCK tck) {

         instantiatedTCK = tck;

     }

     static  BrwsrCtx newContext(Class<?> clazz) {

         for (KnockoutTCK tck : tcks(clazz)) {

             BrwsrCtx c = tck.createContext();

             if (c != null) {

                 return c;

             }

         }

         throw new AssertionError("Can't find appropriate Context in ServiceLoader!");

     }

     static Object createObject(Map<String,Object> values, Class<?> clazz) {

         for (KnockoutTCK tck : tcks(clazz)) {

             Object o = tck.createJSON(values);

             if (o != null) {

                 return o;

             }

         }

         throw new AssertionError("Can't find appropriate Context in ServiceLoader!");

     }

     static Object executeScript(Class<?> clazz, 

         String script, Object... arguments

     ) throws Exception {

         for (KnockoutTCK tck : tcks(clazz)) {

             return tck.executeScript(script, arguments);

         }

         throw new AssertionError("Can't find appropriate Context in ServiceLoader!");

     }

     private static Iterable<KnockoutTCK> tcks(Class<?> clazz) {

         if (instantiatedTCK != null) {

             return Collections.singleton(instantiatedTCK);

         }

         return ServiceLoader.load(KnockoutTCK.class, cl(clazz));

     }

     static Object exposeHTML(Class<?> clazz, String html) throws Exception {

         String s = 

           "var n = window.document.getElementById('ko.test.div'); \n "

         + "if (!n) { \n"

         + "  n = window.document.createElement('div'); \n "

         + "  n.id = 'ko.test.div'; \n "

         + "  var body = window.document.getElementsByTagName('body')[0];\n"

         + "  body.appendChild(n);\n"

         + "}\n"

         + "n.innerHTML = arguments[0]; \n ";

         return executeScript(clazz, s, html);

     }

     static String prepareURL(

         Class<?> clazz, String content, String mimeType, String... parameters) {

         for (KnockoutTCK tck : tcks(clazz)) {

             URI o = tck.prepareURL(content, mimeType, parameters);

             if (o != null) {

                 return o.toString();

             }

         }

         throw new IllegalStateException();

     }

     static boolean canFailWebSockets(

         Class<?> clazz) {

         for (KnockoutTCK tck : tcks(clazz)) {

             if (tck.canFailWebSocketTest()) {

                 return true;

             }

         }

         return false;

     }

     private static ClassLoader cl(Class<?> c) {

         try {

             return c.getClassLoader();

         } catch (SecurityException ex) {

             return null;

         }

     }

 }