/**

  * HTML via Java(tm) Language Bindings

  * Copyright (C) 2013 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. apidesign.org

  * designates this particular file as subject to the

  * "Classpath" exception as provided by apidesign.org

  * in the License file that accompanied this code.

  *

  * 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://wiki.apidesign.org/wiki/GPLwithClassPathException

  */

 package org.apidesign.html.kofx;

 import java.io.Closeable;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.ServiceLoader;

 import java.util.logging.Logger;

 import javafx.application.Platform;

 import net.java.html.js.JavaScriptBody;

 import netscape.javascript.JSObject;

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

 import org.apidesign.html.context.spi.Contexts;

 import org.apidesign.html.json.spi.FunctionBinding;

 import org.apidesign.html.json.spi.JSONCall;

 import org.apidesign.html.json.spi.PropertyBinding;

 import org.apidesign.html.json.spi.Technology;

 import org.apidesign.html.json.spi.Transfer;

 import org.apidesign.html.json.spi.WSTransfer;

 import org.openide.util.lookup.ServiceProvider;

 /** This is an implementation package - just

  * include its JAR on classpath and use official {@link Context} API

  * to access the functionality.

  * <p>

  * Registers {@link ContextProvider}, so {@link ServiceLoader} can find it.

  *

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

  */

 public final class FXContext

 implements Technology.BatchInit<JSObject>, Transfer, WSTransfer<LoadWS> {

     static final Logger LOG = Logger.getLogger(FXContext.class.getName());

     private static Boolean javaScriptEnabled;

     private final Fn.Presenter browserContext;

     public FXContext(Fn.Presenter browserContext) {

         this.browserContext = browserContext;

     }

     @JavaScriptBody(args = {}, body = "return true;")

     private static boolean isJavaScriptEnabledJs() {

         return false;

     }

     static boolean isJavaScriptEnabled() {

         if (javaScriptEnabled != null) {

             return javaScriptEnabled;

         }

         return javaScriptEnabled = isJavaScriptEnabledJs();

     }

     final boolean areWebSocketsSupported() {

         return LoadWS.isSupported();

     }

     @Override

     public JSObject wrapModel(Object model, PropertyBinding[] propArr, FunctionBinding[] funcArr) {

         String[] propNames = new String[propArr.length];

         boolean[] propReadOnly = new boolean[propArr.length];

         Object[] propValues = new Object[propArr.length];

         for (int i = 0; i < propNames.length; i++) {

             propNames[i] = propArr[i].getPropertyName();

             propReadOnly[i] = propArr[i].isReadOnly();

             propValues[i] = propArr[i].getValue();

         }

         String[] funcNames = new String[funcArr.length];

         for (int i = 0; i < funcNames.length; i++) {

             funcNames[i] = funcArr[i].getFunctionName();

         }

         return Knockout.wrapModel(model, 

             propNames, propReadOnly, Knockout.toArray(propValues), propArr, 

             funcNames, funcArr

         );

     }

     @Override

     public JSObject wrapModel(Object model) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void bind(PropertyBinding b, Object model, JSObject data) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void valueHasMutated(JSObject data, String propertyName) {

         Knockout.valueHasMutated(data, propertyName);

     }

     @Override

     public void expose(FunctionBinding fb, Object model, JSObject d) {

         throw new UnsupportedOperationException();

     }

     @Override

     public void applyBindings(JSObject data) {

         Knockout.applyBindings(data);

     }

     @Override

     public Object wrapArray(Object[] arr) {

         return Knockout.toArray(arr);

     }

     @Override

     public void extract(Object obj, String[] props, Object[] values) {

         LoadJSON.extractJSON(obj, props, values);

     }

     @Override

     public void loadJSON(final JSONCall call) {

         LoadJSON.loadJSON(call);

     }

     @Override

     public <M> M toModel(Class<M> modelClass, Object data) {

         if (data instanceof JSObject) {

             data = ((JSObject)data).getMember("ko-fx.model"); // NOI18N

         }

         return modelClass.cast(data);

     }

     @Override

     public Object toJSON(InputStream is) throws IOException {

         return LoadJSON.parse(is);

     }

     @Override

     public void runSafe(final Runnable r) {

         class Wrap implements Runnable {

             @Override public void run() {

                 try (Closeable c = Fn.activate(browserContext)) {

                     r.run();

                 } catch (IOException ex) {

                     // cannot be thrown

                 }

             }

         }

         Wrap w = new Wrap();

         if (Platform.isFxApplicationThread()) {

             w.run();

         } else {

             Platform.runLater(w);

         }

     }

     @Override

     public LoadWS open(String url, JSONCall onReply) {

         return new LoadWS(onReply, url);

     }

     @Override

     public void send(LoadWS socket, JSONCall data) {

         socket.send(data);

     }

     @Override

     public void close(LoadWS socket) {

         socket.close();

     }

     @ServiceProvider(service = Contexts.Provider.class)

     public static final class Prvdr implements Contexts.Provider {

         @Override

         public void fillContext(Contexts.Builder context, Class<?> requestor) {

             if (isJavaScriptEnabled()) {

                 FXContext c = new FXContext(Fn.activePresenter());

                 context.register(Technology.class, c, 100);

                 context.register(Transfer.class, c, 100);

                 if (c.areWebSocketsSupported()) {

                     context.register(WSTransfer.class, c, 100);

                 }

             }

         }

     }

 }