/**

  * 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.htmlpage;

 import java.util.List;

 import org.apidesign.bck2brwsr.core.JavaScriptBody;

 import org.apidesign.bck2brwsr.htmlpage.api.ComputedProperty;

 import org.apidesign.bck2brwsr.htmlpage.api.OnEvent;

 import org.apidesign.bck2brwsr.htmlpage.api.OnFunction;

 import org.apidesign.bck2brwsr.htmlpage.api.Page;

 import org.apidesign.bck2brwsr.htmlpage.api.Property;

 import org.apidesign.bck2brwsr.vmtest.BrwsrTest;

 import org.apidesign.bck2brwsr.vmtest.HtmlFragment;

 import org.apidesign.bck2brwsr.vmtest.VMTest;

 import org.testng.annotations.Factory;

 /**

  *

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

  */

 @Page(xhtml="Knockout.xhtml", className="KnockoutModel", properties={

     @Property(name="name", type=String.class),

     @Property(name="results", type=String.class, array = true),

     @Property(name="callbackCount", type=int.class),

     @Property(name="people", type=PersonImpl.class, array = true)

 }) 

 public class KnockoutTest {

     @HtmlFragment(

         "<h1 data-bind=\"text: helloMessage\">Loading Bck2Brwsr's Hello World...</h1>\n" +

         "Your name: <input id='input' data-bind=\"value: name\"></input>\n" +

         "<button id=\"hello\">Say Hello!</button>\n"

     )

     @BrwsrTest public void modifyValueAssertChangeInModel() {

         KnockoutModel m = new KnockoutModel();

         m.setName("Kukuc");

         m.applyBindings();

         assert "Kukuc".equals(m.input.getValue()) : "Value is really kukuc: " + m.input.getValue();

         m.input.setValue("Jardo");

         m.triggerEvent(m.input, OnEvent.CHANGE);

         assert "Jardo".equals(m.getName()) : "Name property updated: " + m.getName();

     }

     @HtmlFragment(

         "<ul id='ul' data-bind='foreach: results'>\n"

         + "  <li data-bind='text: $data, click: $root.call'/>\n"

         + "</ul>\n"

     )

     @BrwsrTest public void displayContentOfArray() {

         KnockoutModel m = new KnockoutModel();

         m.getResults().add("Ahoj");

         m.applyBindings();

         int cnt = countChildren("ul");

         assert cnt == 1 : "One child, but was " + cnt;

         m.getResults().add("Hi");

         cnt = countChildren("ul");

         assert cnt == 2 : "Two children now, but was " + cnt;

         triggerChildClick("ul", 1);

         assert 1 == m.getCallbackCount() : "One callback " + m.getCallbackCount();

         assert "Hi".equals(m.getName()) : "We got callback from 2nd child " + m.getName();

     }

     @HtmlFragment(

         "<ul id='ul' data-bind='foreach: cmpResults'>\n"

         + "  <li><b data-bind='text: $data'></b></li>\n"

         + "</ul>\n"

     )

     @BrwsrTest public void displayContentOfDerivedArray() {

         KnockoutModel m = new KnockoutModel();

         m.getResults().add("Ahoj");

         m.applyBindings();

         int cnt = countChildren("ul");

         assert cnt == 1 : "One child, but was " + cnt;

         m.getResults().add("hello");

         cnt = countChildren("ul");

         assert cnt == 2 : "Two children now, but was " + cnt;

     }

     @HtmlFragment(

         "<ul id='ul' data-bind='foreach: people'>\n"

         + "  <li data-bind='text: $data.firstName, click: $root.removePerson'></li>\n"

         + "</ul>\n"

     )

     @BrwsrTest public void displayContentOfArrayOfPeople() {

         KnockoutModel m = new KnockoutModel();

         final Person first = new Person();

         first.setFirstName("first");

         m.getPeople().add(first);

         m.applyBindings();

         int cnt = countChildren("ul");

         assert cnt == 1 : "One child, but was " + cnt;

         final Person second = new Person();

         second.setFirstName("second");

         m.getPeople().add(second);

         cnt = countChildren("ul");

         assert cnt == 2 : "Two children now, but was " + cnt;

         triggerChildClick("ul", 1);

         assert 1 == m.getCallbackCount() : "One callback " + m.getCallbackCount();

         cnt = countChildren("ul");

         assert cnt == 1 : "Again one child, but was " + cnt;

         String txt = childText("ul", 0);

         assert "first".equals(txt) : "Expecting 'first': " + txt;

         first.setFirstName("changed");

         txt = childText("ul", 0);

         assert "changed".equals(txt) : "Expecting 'changed': " + txt;

     }

     @OnFunction

     static void call(KnockoutModel m, String data) {

         m.setName(data);

         m.setCallbackCount(m.getCallbackCount() + 1);

     }

     @OnFunction

     static void removePerson(KnockoutModel model, Person data) {

         model.setCallbackCount(model.getCallbackCount() + 1);

         model.getPeople().remove(data);

     }

     @ComputedProperty

     static String helloMessage(String name) {

         return "Hello " + name + "!";

     }

     @ComputedProperty

     static List<String> cmpResults(List<String> results) {

         return results;

     }

     @Factory

     public static Object[] create() {

         return VMTest.create(KnockoutTest.class);

     }

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

           "var e = window.document.getElementById(id);\n "

         + "if (typeof e === 'undefined') return -2;\n "

         + "return e.children.length;\n "

     )

     private static native int countChildren(String id);

     @JavaScriptBody(args = { "id", "pos" }, body = 

           "var e = window.document.getElementById(id);\n "

         + "var ev = window.document.createEvent('MouseEvents');\n "

         + "ev.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);\n "

         + "e.children[pos].dispatchEvent(ev);\n "

     )

     private static native void triggerChildClick(String id, int pos);

     @JavaScriptBody(args = { "id", "pos" }, body = 

           "var e = window.document.getElementById(id);\n "

         + "var t = e.children[pos].innerHTML;\n "

         + "return t ? t : null;"

     )

     private static native String childText(String id, int pos);

 }