/**************************************************
*   Author: Morrison
*   Date:  03 Nov 202020
**************************************************/

import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.Slider;
import javafx.scene.control.Label;
import javafx.scene.control.Button;
import java.util.ArrayList;

public class Draw extends Application
{
    private final Canvas canvas;
    private final GraphicsContext pen;
    private Color bgColor;
    private Color currentColor;
    private ArrayList<Curve> drawing;
    private Curve curve;
    private double mainWidth;
    public Draw()
    {
        canvas = new Canvas(800, 600);
        pen = canvas.getGraphicsContext2D();
        bgColor = Color.WHITE;
        currentColor = Color.BLACK;
        drawing = new ArrayList<Curve>();
        mainWidth = 1;
        curve = null;
    }
    
    @Override
    public void init()
    {
    }

    @Override
    public void start(Stage primary)
    {
        primary.setTitle("Draw Application");
        BorderPane bp = new BorderPane();
        bp.setCenter(canvas);
        bp.setTop(buildMenus());
        canvas.setOnMousePressed( e -> 
        {
            curve = new Curve(currentColor, mainWidth);
            drawing.add(curve);
            curve.add(new Point(e.getX(), e.getY()));
        });
        canvas.setOnMouseDragged( e ->
        {
            curve.add(new Point(e.getX(), e.getY()));
            curve.draw(pen);
        });
        canvas.setOnMouseReleased( e -> 
        {
            curve.add(new Point(e.getX(), e.getY()));
            curve.draw(pen);
        });
        primary.setScene(new Scene(bp));
        primary.show();
    }

    private MenuBar buildMenus()
    {
        MenuBar mbar = new MenuBar();
        Menu fileMenu = new Menu("File");
        MenuItem quitItem = new MenuItem("Quit");
        fileMenu.setOnAction(e -> Platform.exit());
        fileMenu.getItems().addAll(quitItem);

        Menu colorMenu = new Menu("Color");
        //populate this color menu.
        colorMenu.getItems().addAll(
            new ColorMenuItem(Color.RED, "red"),
            new ColorMenuItem(Color.GREEN, "green"),
            new ColorMenuItem(Color.rgb(0, 0x1A, 0x57), "Dook"),
            new ColorMenuItem(Color.BLUE, "blue")
        );

        Menu bgMenu = new Menu("Background");
        //create and populate width menu
        Menu widthMenu = new Menu("Width");
        WidthMenuItem one = new WidthMenuItem(1);
        WidthMenuItem five = new WidthMenuItem(5);
        WidthMenuItem ten = new WidthMenuItem(10);
        WidthMenuItem twenty = new WidthMenuItem(20);
        WidthMenuItem fifty = new WidthMenuItem(50);
        MenuItem chooseItem = new MenuItem("Custom...");
        widthMenu.getItems().addAll(one, five, ten, twenty, fifty, chooseItem);
        chooseItem.setOnAction( e ->
        {
			Stage popup = new Stage();
			BorderPane p = new BorderPane();
			HBox hbox = new HBox();
			Button doneButton = new Button("Done");
			Slider size = new Slider(1, 200, mainWidth);
			Label number = new Label("Width of Pen: " + mainWidth);
			size.valueProperty().addListener((observable, oldValue, newValue) ->
			{
			  number.setText("Width of Pen: " + newValue.intValue());
			  mainWidth = newValue.intValue();
			});
			hbox.getChildren().addAll(number, size, doneButton);
			p.setTop(hbox);
			popup.setScene(new Scene(p, 300, 200));
			popup.show();
			doneButton.setOnAction(f -> popup.close());
        });

        mbar.getMenus().addAll(fileMenu, colorMenu, bgMenu,
            widthMenu);
        return mbar;
    }
    public void refresh()
    {   
        //draw the background
        pen.setFill(bgColor);
        pen.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
        ///redraw curves
        for( Curve c: drawing)
        {
            c.draw(pen);
        }
        //
    }
    public void serialize()
    {
        try
        {
            ObjectOutputStream oos = new ObjectOutputStream(
               new FileStream("draw.test"));
            oos.
        }
    }
    @Override
    public void stop()
    {
    }
    class ColorMenuItem extends MenuItem
    {
        private final Color color;
        public ColorMenuItem(Color color, String name)
        {
            super(name);
            this.color = color;
            setOnAction( e -> 
            {
                currentColor = color;
            });
        }

    }
    class WidthMenuItem extends MenuItem
    {
        private final double width;
        public WidthMenuItem(double width)
        {
            super("" + width);
            this.width = width;
            setOnAction( e -> 
            {
                mainWidth = width;
            });
        }
    }
    class BgMenuItem extends MenuItem
    {
        private final Color color;
        public BgMenuItem(Color color, String name)
        {
            super(name);
            this.color = color;
            setOnAction( e -> 
            {
                bgColor = color;
                refresh();
            });
        }
    }

}