/**

  * 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.fx;

 import java.net.URL;

 import java.util.ResourceBundle;

 import java.util.concurrent.CountDownLatch;

 import java.util.concurrent.Executors;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 import java.util.prefs.Preferences;

 import javafx.application.Application;

 import javafx.application.Platform;

 import javafx.beans.value.ChangeListener;

 import javafx.beans.value.ObservableValue;

 import javafx.concurrent.Worker;

 import javafx.event.ActionEvent;

 import javafx.event.EventHandler;

 import javafx.geometry.Insets;

 import javafx.geometry.Pos;

 import javafx.geometry.Rectangle2D;

 import javafx.scene.Scene;

 import javafx.scene.control.Button;

 import javafx.scene.control.TextField;

 import javafx.scene.layout.BorderPane;

 import javafx.scene.layout.HBox;

 import javafx.scene.layout.VBox;

 import javafx.scene.text.Text;

 import javafx.scene.web.PromptData;

 import javafx.scene.web.WebEvent;

 import javafx.scene.web.WebView;

 import javafx.stage.Modality;

 import javafx.stage.Screen;

 import javafx.stage.Stage;

 import javafx.stage.Window;

 import javafx.stage.WindowEvent;

 import javafx.util.Callback;

 /** This is an implementation class, to implement browser builder API. Just

  * include this JAR on classpath and the browser builder API will find

  * this implementation automatically.

  */

 public class FXBrwsr extends Application {

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

     private static FXBrwsr INSTANCE;

     private static final CountDownLatch FINISHED = new CountDownLatch(1);

     private BorderPane root;

     public static synchronized WebView findWebView(final URL url, final FXPresenter onLoad) {

         if (INSTANCE == null) {

             final String callee = findCalleeClassName();

             Executors.newFixedThreadPool(1).submit(new Runnable() {

                 @Override

                 public void run() {

                     try {

                         FXBrwsr.launch(FXBrwsr.class, callee);

                     } catch (Throwable ex) {

                         ex.printStackTrace();

                     } finally {

                         FINISHED.countDown();

                     }

                 }

             });

         }

         while (INSTANCE == null) {

             try {

                 FXBrwsr.class.wait();

             } catch (InterruptedException ex) {

                 // wait more

             }

         }

         if (!Platform.isFxApplicationThread()) {

             final WebView[] arr = {null};

             final CountDownLatch waitForResult = new CountDownLatch(1);

             Platform.runLater(new Runnable() {

                 @Override

                 public void run() {

                     arr[0] = INSTANCE.newView(url, onLoad);

                     waitForResult.countDown();

                 }

             });

             for (;;) {

                 try {

                     waitForResult.await();

                     break;

                 } catch (InterruptedException ex) {

                     LOG.log(Level.INFO, null, ex);

                 }

             }

             return arr[0];

         } else {

             return INSTANCE.newView(url, onLoad);

         }

     }

     static synchronized Stage findStage() throws InterruptedException {

         while (INSTANCE == null) {

             FXBrwsr.class.wait();

         }

         return INSTANCE.stage;

     }

     private Stage stage;

     @Override

     public void start(Stage primaryStage) throws Exception {

         BorderPane r = new BorderPane();

         Object[] arr = findInitialSize(this.getParameters().getRaw().get(0));

         Scene scene = new Scene(r, (Double)arr[2], (Double)arr[3]);

         primaryStage.setScene(scene);

         this.root = r;

         this.stage = primaryStage;

         synchronized (FXBrwsr.class) {

             INSTANCE = this;

             FXBrwsr.class.notifyAll();

         }

         primaryStage.setX((Double)arr[0]);

         primaryStage.setY((Double)arr[1]);

         if (arr[4] != null) {

             scene.getWindow().setOnCloseRequest((EventHandler<WindowEvent>) arr[4]);

         }

         if (Boolean.getBoolean("fxpresenter.headless")) {

             return;

         }

         primaryStage.show();

     }

     static String findCalleeClassName() {

         StackTraceElement[] frames = new Exception().getStackTrace();

         for (StackTraceElement e : frames) {

             String cn = e.getClassName();

             if (cn.startsWith("org.netbeans.html.")) { // NOI18N

                 continue;

             }

             if (cn.startsWith("net.java.html.")) { // NOI18N

                 continue;

             }

             if (cn.startsWith("java.")) { // NOI18N

                 continue;

             }

             if (cn.startsWith("javafx.")) { // NOI18N

                 continue;

             }

             if (cn.startsWith("com.sun.")) { // NOI18N

                 continue;

             }

             return cn;

         }

         return "org.netbeans.html"; // NOI18N

     }

     private static Object[] findInitialSize(String callee) {

         final Preferences prefs = Preferences.userRoot().node(callee.replace('.', '/'));

         Rectangle2D screen = Screen.getPrimary().getBounds();

         double x = prefs.getDouble("x", screen.getWidth() * 0.05); // NOI18N

         double y = prefs.getDouble("y", screen.getHeight() * 0.05); // NOI18N

         double width = prefs.getDouble("width", screen.getWidth() * 0.9); // NOI18N

         double height = prefs.getDouble("height", screen.getHeight() * 0.9); // NOI18N

         Object[] arr = {

             x, y, width, height, null

         };

         if (!callee.equals("org.netbeans.html")) { // NOI18N

             arr[4] = new EventHandler<WindowEvent>() {

                 @Override

                 public void handle(WindowEvent event) {

                     Window window = (Window) event.getSource();

                     prefs.putDouble("x", window.getX()); // NOI18N

                     prefs.putDouble("y", window.getY()); // NOI18N

                     prefs.putDouble("width", window.getWidth()); // NOI18N

                     prefs.putDouble("height", window.getHeight()); // NOI18N

                 }

             };

         }

         return arr;

     }

     private WebView newView(final URL url, final FXPresenter onLoad) {

         final WebView view = new WebView();

         view.setContextMenuEnabled(false);

         view.getEngine().setOnAlert(new EventHandler<WebEvent<String>>() {

             @Override

             public void handle(WebEvent<String> t) {

                 final Stage dialogStage = new Stage();

                 dialogStage.initModality(Modality.WINDOW_MODAL);

                 dialogStage.initOwner(stage);

                 ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N

                 dialogStage.setTitle(r.getString("AlertTitle")); // NOI18N

                 final Button button = new Button(r.getString("AlertCloseButton")); // NOI18N

                 final Text text = new Text(t.getData());

                 VBox box = new VBox();

                 box.setAlignment(Pos.CENTER);

                 box.setSpacing(10);

                 box.setPadding(new Insets(10));

                 box.getChildren().addAll(text, button);

                 dialogStage.setScene(new Scene(box));

                 button.setCancelButton(true);

                 button.setOnAction(new CloseDialogHandler(dialogStage, null));

                 dialogStage.centerOnScreen();

                 dialogStage.showAndWait();

             }

         });

         view.getEngine().setConfirmHandler(new Callback<String, Boolean>() {

             @Override

             public Boolean call(String question) {

                 final Stage dialogStage = new Stage();

                 dialogStage.initModality(Modality.WINDOW_MODAL);

                 dialogStage.initOwner(stage);

                 ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N

                 dialogStage.setTitle(r.getString("ConfirmTitle")); // NOI18N

                 final Button ok = new Button(r.getString("ConfirmOKButton")); // NOI18N

                 final Button cancel = new Button(r.getString("ConfirmCancelButton")); // NOI18N

                 final Text text = new Text(question);

                 final Insets ins = new Insets(10);

                 final VBox box = new VBox();

                 box.setAlignment(Pos.CENTER);

                 box.setSpacing(10);

                 box.setPadding(ins);

                 final HBox buttons = new HBox(10);

                 buttons.getChildren().addAll(ok, cancel);

                 buttons.setAlignment(Pos.CENTER);

                 buttons.setPadding(ins);

                 box.getChildren().addAll(text, buttons);

                 dialogStage.setScene(new Scene(box));

                 ok.setCancelButton(false);

                 final boolean[] res = new boolean[1];

                 ok.setOnAction(new CloseDialogHandler(dialogStage, res));

                 cancel.setCancelButton(true);

                 cancel.setOnAction(new CloseDialogHandler(dialogStage, null));

                 dialogStage.centerOnScreen();

                 dialogStage.showAndWait();

                 return res[0];

             }

         });

         view.getEngine().setPromptHandler(new Callback<PromptData, String>() {

             @Override

             public String call(PromptData prompt) {

                 final Stage dialogStage = new Stage();

                 dialogStage.initModality(Modality.WINDOW_MODAL);

                 dialogStage.initOwner(stage);

                 ResourceBundle r = ResourceBundle.getBundle("org/netbeans/html/boot/fx/Bundle"); // NOI18N

                 dialogStage.setTitle(r.getString("PromptTitle")); // NOI18N

                 final Button ok = new Button(r.getString("PromptOKButton")); // NOI18N

                 final Button cancel = new Button(r.getString("PromptCancelButton")); // NOI18N

                 final Text text = new Text(prompt.getMessage());

                 final TextField line = new TextField();

                 if (prompt.getDefaultValue() != null) {

                     line.setText(prompt.getDefaultValue());

                 }

                 final Insets ins = new Insets(10);

                 final VBox box = new VBox();

                 box.setAlignment(Pos.CENTER);

                 box.setSpacing(10);

                 box.setPadding(ins);

                 final HBox buttons = new HBox(10);

                 buttons.getChildren().addAll(ok, cancel);

                 buttons.setAlignment(Pos.CENTER);

                 buttons.setPadding(ins);

                 box.getChildren().addAll(text, line, buttons);

                 dialogStage.setScene(new Scene(box));

                 ok.setCancelButton(false);

                 final boolean[] res = new boolean[1];

                 ok.setOnAction(new CloseDialogHandler(dialogStage, res));

                 cancel.setCancelButton(true);

                 cancel.setOnAction(new CloseDialogHandler(dialogStage, null));

                 dialogStage.centerOnScreen();

                 dialogStage.showAndWait();

                 return res[0] ? line.getText() : null;

             }

         });

         root.setCenter(view);

         final Worker<Void> w = view.getEngine().getLoadWorker();

         w.stateProperty().addListener(new ChangeListener<Worker.State>() {

             private String previous;

             @Override

             public void changed(ObservableValue<? extends Worker.State> ov, Worker.State t, Worker.State newState) {

                 if (newState.equals(Worker.State.SUCCEEDED)) {

                     if (checkValid()) {

                         FXConsole.register(view.getEngine());

                         onLoad.onPageLoad();

                     }

                 }

                 if (newState.equals(Worker.State.FAILED)) {

                     throw new IllegalStateException("Failed to load " + url);

                 }

             }

             private boolean checkValid() {

                 final String crnt = view.getEngine().getLocation();

                 if (previous != null && !previous.equals(crnt)) {

                     w.stateProperty().removeListener(this);

                     return false;

                 }

                 previous = crnt;

                 return true;

             }

         });

         class Title implements ChangeListener<String> {

             private String title;

             public Title() {

                 super();

             }

             @Override

             public void changed(ObservableValue<? extends String> ov, String t, String t1) {

                 title = view.getEngine().getTitle();

                 if (title != null) {

                     stage.setTitle(title);

                 }

             }

         }

         final Title x = new Title();

         view.getEngine().titleProperty().addListener(x);

         x.changed(null, null, null);

         return view;

     }

     static void waitFinished() {

         for (;;) {

             try {

                 FINISHED.await();

                 break;

             } catch (InterruptedException ex) {

                 LOG.log(Level.INFO, null, ex);

             }

         }

     }

     private static final class CloseDialogHandler implements EventHandler<ActionEvent> {

         private final Stage dialogStage;

         private final boolean[] res;

         public CloseDialogHandler(Stage dialogStage, boolean[] res) {

             this.dialogStage = dialogStage;

             this.res = res;

         }

         @Override

         public void handle(ActionEvent t) {

             dialogStage.close();

             if (res != null) {

                 res[0] = true;

             }

         }

     }

 }