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package testfittoparent;

import java.util.Map;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.ScrollPane;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

/**
 *
 * @author danielfuchs
 */
public class Main extends Application {
    public static void main(String[] args) {
        Application.launch(Main.class, args);
    }

    Menu initFakeMenu(int j) {
        final Menu fakeMenu;
        final MenuItem one;
        final MenuItem two;
        final MenuItem three;

        fakeMenu = new Menu("Fake-"+j);
        fakeMenu.setId("fakeMenu"+j);

        for (int i=0; i<(2*j)+4; i++) {
            final MenuItem m = new MenuItem("Menu"+i);
            m.setId("menu"+i+"MenuItem");
            m.setOnAction(new EventHandler<ActionEvent>() {
                @Override
                public void handle(ActionEvent e) {
                }
            });
            m.setDisabled(i==1);
            fakeMenu.getItems().add(m);
        }
        return fakeMenu;
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        //System.setProperty("apple.laf.useScreenMenuBar", "true");
        //Logging.getLayoutLogger().setLevel(PlatformLogger.FINEST);

        AnchorPane root = new AnchorPane();
        Stage stage = primaryStage;
        Scene scene = new Scene(root, 600, 400, Color.BEIGE);
        scene.getStylesheets().add(Main.class.getResource("demo.css").toExternalForm());
        stage.setScene(scene);
        ObservableList<Menu> menus = FXCollections.observableArrayList();
        for (int i=0; i<8; i++) {
            menus.add(initFakeMenu(i));
        }

        final MenuBar menuBar = new MenuBar();
        menuBar.setId("menuBar");
        menuBar.getMenus().addAll(menus);
        setBlocksMouse(menuBar, true);
        root.getChildren().add(menuBar);

        AnchorPane area = new AnchorPane();
        area.setId("area");
        area.getStyleClass().add("area");
        area.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
        area.setPrefSize(600, 400);
        AnchorPane.setTopAnchor(area, max(menuBar.getPrefHeight(), menuBar.prefHeight(-1), 20.0));
        AnchorPane.setBottomAnchor(area, 0.0);
        AnchorPane.setRightAnchor(area, 0.0);
        AnchorPane.setLeftAnchor(area, 0.0);

        Button button = new Button("Button");
        button.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);
//        AnchorPane.setTopAnchor(button, 0.0);
//        AnchorPane.setBottomAnchor(button, 0.0);
//        AnchorPane.setRightAnchor(button, 0.0);
//        AnchorPane.setLeftAnchor(button, 0.0);

//        AnchorPane container = new AnchorPane();
//        container.getChildren().add(button);
        ScrollPane container = new ScrollPane();
        container.setNode(button);

        AnchorPane.setTopAnchor(container, 0.0);
        AnchorPane.setBottomAnchor(container, 0.0);
        AnchorPane.setRightAnchor(container, 0.0);
        AnchorPane.setLeftAnchor(container, 0.0);
        area.getChildren().add(container);
        root.getChildren().add(area);
        stage.setVisible(true);
        stage.sizeToScene();
    }

    private static final String blocksMouseInstalledKey = Main.class.getName() + ".installedBlocksMouse";
    private static final String blocksMouseKey = Main.class.getName() + ".blocksMouse";
    public static void setBlocksMouse(Node node, boolean blocksMouse) {
        installBlocksMouseHandler(node);
        final Map<Object, Object> properties = node.getProperties();
        properties.put(blocksMouseKey, blocksMouse);
    }

    private static void installBlocksMouseHandler(final Node node) {
        final Map<Object, Object> properties = node.getProperties();
        boolean installed = properties.containsKey(blocksMouseInstalledKey);
        if (!installed) {
            node.addEventHandler(MouseEvent.ANY, new EventHandler<MouseEvent>() {
                @Override public void handle(MouseEvent event) {
                    // The onMouseWhatever handlers get called after the addEventHandler handlers, so
                    // if we mark the event consumed here then the appropriate onMouseWhatever won't get it.
                    // So we need to invoke it ourselves.
                    if (properties.get(blocksMouseKey) == (Boolean) true) {
                        event.consume();
                    }
                }
            });
            properties.put(blocksMouseInstalledKey, true);
        }
    }

    private double max(double first, double... rest) {
        double max = first;
        for (double d : rest) {
            max = Math.max(max, d);
        }
        return max;
    }

}