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package net.java.html.boot.fx;

import java.net.URL;

import java.util.concurrent.CountDownLatch;

import javafx.application.Application;

import javafx.application.Platform;

import javafx.scene.Scene;

import javafx.scene.layout.BorderPane;

import javafx.scene.web.WebView;

import javafx.stage.Stage;

import net.java.html.js.JavaScriptBody;

import static org.testng.Assert.*;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.Test;

/**

 *

 * @author Jaroslav Tulach

 */

public class FXBrowsersTest {

    public FXBrowsersTest() {

    }

    @BeforeClass public void initFX() throws Throwable {

        new Thread("initFX") {

            @Override

            public void run() {

                if (Platform.isFxApplicationThread()) {

                    new App().start(new Stage());

                } else {

                    try {

                        App.launch(App.class);

                    } catch (IllegalStateException ex) {

                        Platform.runLater(this);

                    }

                }

            }

        }.start();

        App.CDL.await();

    }

    @Test

    public void behaviorOfTwoWebViewsAtOnce() throws Throwable {

        class R implements Runnable {

            CountDownLatch DONE = new CountDownLatch(1);

            Throwable t;

            @Override

            public void run() {

                try {

                    doTest();

                } catch (Throwable ex) {

                    t = ex;

                } finally {

                    DONE.countDown();

                }

            }

            private void doTest() throws Throwable {

                URL u = FXBrowsersTest.class.getResource("/org/netbeans/html/boot/fx/empty.html");

                assertNotNull(u, "URL found");

                FXBrowsers.load(App.getV1(), u, OnPages.class, "first");

            }

        }

        R run = new R();

        Platform.runLater(run);

        run.DONE.await();

        for (int i = 0; i < 100; i++) {

            if (run.t != null) {

                throw run.t;

            }

            if (System.getProperty("finalSecond") == null) {

                Thread.sleep(100);

            }

        }

        assertEquals(Integer.getInteger("finalFirst"), Integer.valueOf(3), "Three times in view one");

        assertEquals(Integer.getInteger("finalSecond"), Integer.valueOf(2), "Two times in view one");

        final CountDownLatch finish = new CountDownLatch(1);

        final Object[] three = { 0 };

        assertFalse(Platform.isFxApplicationThread());

        FXBrowsers.runInBrowser(App.getV1(), new Runnable() {

            @Override

            public void run() {

                assertTrue(Platform.isFxApplicationThread());

                three[0] = App.getV1().getEngine().executeScript("window.cntBrwsr");

                finish.countDown();

            }

        });

        finish.await();

        assertEquals(three[0], Integer.valueOf(3));

    }

    public static class OnPages {

        static Class<?> first;

        static Object firstWindow;

        public static void first() {

            first = OnPages.class;

            firstWindow = window();

            assertNotNull(firstWindow, "First window found");

            assertEquals(increment(), 1, "Now it is one");

            URL u = FXBrowsersTest.class.getResource("/org/netbeans/html/boot/fx/empty.html");

            assertNotNull(u, "URL found");

            FXBrowsers.load(App.getV2(), u, new Runnable() {

                @Override

                public void run() {

                    OnPages.second("Hello");

                }

            });

            assertEquals(increment(), 2, "Now it is two and not influenced by second view");

            System.setProperty("finalFirst", "" + increment());

        }

        public static void second(String... args) {

            assertEquals(args.length, 1, "One string argument");

            assertEquals(args[0], "Hello", "It is hello");

            assertEquals(first, OnPages.class, "Both views share the same classloader");

            Object window = window();

            assertNotNull(window, "Some window found");

            assertNotNull(firstWindow, "First window is known");

            assertNotSame(firstWindow, window, "The window objects should be different");

            assertEquals(increment(), 1, "Counting starts from zero");

            System.setProperty("finalSecond", "" + increment());

        }

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

        private static native Object window();

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

            + "if (window.cntBrwsr) return ++window.cntBrwsr;"

            + "return window.cntBrwsr = 1;"

        )

        private static native int increment();

    }

    public static class App extends Application {

        static final CountDownLatch CDL = new CountDownLatch(1);

        private static BorderPane pane;

        /**

         * @return the v1

         */

        static WebView getV1() {

            return (WebView)System.getProperties().get("v1");

        }

        /**

         * @return the v2

         */

        static WebView getV2() {

            return (WebView)System.getProperties().get("v2");

        }

        @Override

        public void start(Stage stage) {

            pane= new BorderPane();

            Scene scene = new Scene(pane, 800, 600);

            stage.setScene(scene);

            System.getProperties().put("v1", new WebView());

            System.getProperties().put("v2", new WebView());

            pane.setCenter(getV1());

            pane.setBottom(getV2());

            CDL.countDown();

        }

    }

}