/**

 * 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.launcher;

import java.io.IOException;

import java.lang.reflect.Method;

import java.net.URI;

import java.net.URL;

import java.net.URLClassLoader;

import java.util.List;

import java.util.concurrent.Executors;

import javafx.application.Application;

import javafx.application.Platform;

import javafx.beans.value.ChangeListener;

import javafx.beans.value.ObservableValue;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.geometry.HPos;

import javafx.geometry.Insets;

import javafx.geometry.VPos;

import javafx.scene.Node;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.TextField;

import javafx.scene.layout.ColumnConstraints;

import javafx.scene.layout.GridPane;

import javafx.scene.layout.Pane;

import javafx.scene.layout.Priority;

import javafx.scene.layout.VBox;

import javafx.scene.web.WebEngine;

import javafx.scene.web.WebView;

import javafx.stage.Stage;

/**

 *

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

 */

final class WebViewLauncher extends Bck2BrwsrLauncher {

    static {

        try {

            Method m = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);

            m.setAccessible(true);

            URL l = new URL("file://" + System.getProperty("java.home") + "/lib/jfxrt.jar");

            System.err.println("url : " + l);

            m.invoke(ClassLoader.getSystemClassLoader(), l);

        } catch (Exception ex) {

            throw new LinkageError("Can't add jfxrt.jar on the classpath", ex);

        }

    }

    public WebViewLauncher() {

        super(null);

    }

    @Override

    protected Object[] showBrwsr(final URI url) throws IOException {

        try {

            Executors.newSingleThreadExecutor().submit(new Runnable() {

                @Override

                public void run() {

                    WebViewBrowser.launch(WebViewBrowser.class, url.toString());

                }

            });

        } catch (Throwable ex) {

            ex.printStackTrace();

        }

        return null;

    }

    @Override

    public void close() throws IOException {

        Platform.exit();

    }

    /**

     * Demonstrates a WebView object accessing a web page.

     *

     * @see javafx.scene.web.WebView

     * @see javafx.scene.web.WebEngine

     */

    public static class WebViewBrowser extends Application {

        @Override

        public void start(Stage primaryStage) throws Exception {

            Pane root = new WebViewPane(getParameters().getUnnamed());

            primaryStage.setScene(new Scene(root, 1024, 768));

            primaryStage.show();

        }

        /**

         * Create a resizable WebView pane

         */

        public class WebViewPane extends Pane {

            public WebViewPane(List<String> params) {

                VBox.setVgrow(this, Priority.ALWAYS);

                setMaxWidth(Double.MAX_VALUE);

                setMaxHeight(Double.MAX_VALUE);

                WebView view = new WebView();

                view.setMinSize(500, 400);

                view.setPrefSize(500, 400);

                final WebEngine eng = view.getEngine();

                final TextField locationField = new TextField();

                System.err.println("params : " + params);

                if (params.size() > 0) {

                    eng.load(params.get(0));

                    locationField.setText(params.get(0));

                }

                locationField.setMaxHeight(Double.MAX_VALUE);

                Button goButton = new Button("Go");

                goButton.setDefaultButton(true);

                EventHandler<ActionEvent> goAction = new EventHandler<ActionEvent>() {

                    @Override

                    public void handle(ActionEvent event) {

                        eng.load(locationField.getText().startsWith("http://") ? locationField.getText()

                            : "http://" + locationField.getText());

                    }

                };

                goButton.setOnAction(goAction);

                locationField.setOnAction(goAction);

                eng.locationProperty().addListener(new ChangeListener<String>() {

                    @Override

                    public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {

                        locationField.setText(newValue);

                    }

                });

                GridPane grid = new GridPane();

                grid.setVgap(5);

                grid.setHgap(5);

                GridPane.setConstraints(locationField, 0, 0, 1, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.SOMETIMES);

                GridPane.setConstraints(goButton, 1, 0);

                GridPane.setConstraints(view, 0, 1, 2, 1, HPos.CENTER, VPos.CENTER, Priority.ALWAYS, Priority.ALWAYS);

                grid.getColumnConstraints().addAll(

                    new ColumnConstraints(100, 100, Double.MAX_VALUE, Priority.ALWAYS, HPos.CENTER, true),

                    new ColumnConstraints(40, 40, 40, Priority.NEVER, HPos.CENTER, true));

                grid.getChildren().addAll(locationField, goButton, view);

                getChildren().add(grid);

            }

            @Override

            protected void layoutChildren() {

                List<Node> managed = getManagedChildren();

                double width = getWidth();

                double height = getHeight();

                double top = getInsets().getTop();

                double right = getInsets().getRight();

                double left = getInsets().getLeft();

                double bottom = getInsets().getBottom();

                for (int i = 0; i < managed.size(); i++) {

                    Node child = managed.get(i);

                    layoutInArea(child, left, top,

                        width - left - right, height - top - bottom,

                        0, Insets.EMPTY, true, true, HPos.CENTER, VPos.CENTER);

                }

            }

        }

    }

}