/**

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.

 *

 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

 * Other names may be trademarks of their respective owners.

 *

 * The contents of this file are subject to the terms of either the GNU

 * 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

 * License.  When distributing the software, include this License Header

 * Notice in each file and include the License file at

 * 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

 * your own identifying information:

 * "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

 * "[Contributor] elects to include this software in this distribution

 * under the [CDDL or GPL Version 2] license." If you do not indicate a

 * single choice of license, a recipient has the option to distribute

 * your version of this file under either the CDDL, the GPL Version 2 or

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

 * However, if you add GPL Version 2 code and therefore, elected the GPL

 * Version 2 license, then the option applies only if the new code is

 * made subject to such option by the copyright holder.

 */

package org.netbeans.html.boot.impl;

import java.io.Closeable;

import java.io.Flushable;

import java.io.IOException;

import java.io.Reader;

import java.net.URL;

import java.net.URLClassLoader;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.List;

import javax.script.Invocable;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import javax.script.ScriptException;

import org.netbeans.html.boot.spi.Fn;

import static org.testng.Assert.assertEquals;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.BeforeMethod;

import org.testng.annotations.Test;

/**

 *

 * @author Jaroslav Tulach

 */

public class FnTest extends JsClassLoaderBase {

    private static Fn.Presenter presenter;

    public FnTest() {

    }

    @BeforeClass

    public static void createClassLoader() throws Exception {

        ScriptEngineManager sem = new ScriptEngineManager();

        final ScriptEngine eng = sem.getEngineByMimeType("text/javascript");

        final URL my = FnTest.class.getProtectionDomain().getCodeSource().getLocation();

        ClassLoader parent = JsClassLoaderTest.class.getClassLoader().getParent();

        final URLClassLoader ul = new URLClassLoader(new URL[] { my }, parent);

        class Impl implements FindResources, Fn.Presenter {

            @Override

            public void findResources(String path, Collection<? super URL> results, boolean oneIsEnough) {

                URL u = ul.findResource(path);

                if (u != null) {

                    results.add(u);

                }

            }

            @Override

            public Fn defineFn(String code, String... names) {

                StringBuilder sb = new StringBuilder();

                sb.append("(function() {");

                sb.append("return function(");

                String sep = "";

                for (String n : names) {

                    sb.append(sep);

                    sb.append(n);

                    sep = ", ";

                }

                sb.append(") {");

                sb.append(code);

                sb.append("};");

                sb.append("})()");

                try {

                    final java.lang.Object val = eng.eval(sb.toString());

                    return new Fn(this) {

                        @Override

                        public java.lang.Object invoke(java.lang.Object thiz, java.lang.Object... args) throws Exception {

                            List<java.lang.Object> all = new ArrayList<java.lang.Object>(args.length + 1);

                            all.add(thiz == null ? val : thiz);

                            all.addAll(Arrays.asList(args));

                            Invocable inv = (Invocable)eng;

                            try {

                                java.lang.Object ret = inv.invokeMethod(val, "call", all.toArray());

                                return val.equals(ret) ? null : ret;

                            } catch (ScriptException ex) {

                                throw ex;

                            }

                        }

                    };

                } catch (ScriptException ex) {

                    throw new LinkageError("Can't parse: " + sb, ex);

                }

            }

            @Override

            public void displayPage(URL resource, Runnable r) {

                throw new UnsupportedOperationException();

            }

            @Override

            public void loadScript(Reader code) throws Exception {

                eng.eval(code);

            }

        }

        Impl impl = new Impl();

        ClassLoader loader = FnUtils.newLoader(impl, impl, parent);

        presenter = impl;

        Closeable close = FnContext.activate(impl);

        methodClass = loader.loadClass(JsMethods.class.getName());

        close.close();

    }

    @Test public void flushingPresenter() throws IOException {

        class FP implements Fn.Presenter, Flushable {

            int flush;

            @Override

            public Fn defineFn(String code, String... names) {

                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

            }

            @Override

            public void displayPage(URL page, Runnable onPageLoad) {

                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

            }

            @Override

            public void loadScript(Reader code) throws Exception {

                throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

            }

            @Override

            public void flush() throws IOException {

                flush++;

            }

        }

        FP p = new FP();

        Closeable c1 = Fn.activate(p);

        Closeable c2 = Fn.activate(p);

        c2.close();

        assertEquals(p.flush, 0, "No flush yet");

        c1.close();

        assertEquals(p.flush, 1, "Now flushed");

    }

    @BeforeMethod public void initPresenter() {

        FnContext.currentPresenter(presenter);

    }

}