package com.bham.pij.assignments.edgedetector;

import java.io.File;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public class UserInterface extends Application {

    private Image img = null;
    private ImageView imgView = null;
    private ImageView edImgView = null;
    private VBox root = new VBox();

    private void loadImageFile(File file) {

        img = new Image("file:" + file.getPath());
        imgView = new ImageView(img);
        root.getChildren().add(imgView);
    }

@Override
	public void start (Stage stage) {

			stage.setTitle("Title");
			VBox root = new VBox();

			Menu fileMenu = new Menu("File");
			MenuItem openItem = new MenuItem("Open");
			MenuItem closeItem = new MenuItem("Close");

			Menu toolsMenu = new Menu("Tools");
			MenuItem edgeDetItem = new MenuItem("Edge Detection");
			MenuItem revertItem = new MenuItem("Revert");

			openItem.setOnAction(new EventHandler<ActionEvent>() {
				@Override
				public void handle(ActionEvent t) {
					FileChooser fileChooser = new FileChooser();
					fileChooser.setTitle("Open Image File");
					File file = fileChooser.showOpenDialog(stage);
					if (file != null) {
						loadImageFile(file);
						root.getChildren().add(imgView);
						openItem.setDisable(true);
						edgeDetItem.setDisable(false);
						revertItem.setDisable(true);
						closeItem.setDisable(false);
					}
				}



			});

			closeItem.setOnAction(new EventHandler<ActionEvent>() {
	            @Override
	            public void handle(ActionEvent t) {

	                root.getChildren().remove(imgView);
	                root.getChildren().remove(edImgView);
	                stage.setTitle("EdgeDetector.exe");

	                openItem.setDisable(false);
	                edgeDetItem.setDisable(true);
	                revertItem.setDisable(true);
	            }
	        });

			edgeDetItem.setOnAction(new EventHandler<ActionEvent>() {
	            @Override
	            public void handle(ActionEvent t) {

	                EdgeDetector obj = new EdgeDetector();
	                root.getChildren().remove(imgView);
	                edImgView = new ImageView(obj.filterImage(img));
	                root.getChildren().add(edImgView);
	                stage.setTitle("EdgeDetector Filter");

	                openItem.setDisable(true);
	                edgeDetItem.setDisable(true);
	                revertItem.setDisable(false);
	            }
	        });

			revertItem.setOnAction(new EventHandler<ActionEvent>() {
	            @Override
	            public void handle(ActionEvent t) {

	                root.getChildren().remove(edImgView);
	                root.getChildren().add(imgView);
	                stage.setTitle("EdgeDetector Filter - Reverted change");

	                openItem.setDisable(true);
	                edgeDetItem.setDisable(false);
	                revertItem.setDisable(true);
	                }
	        });

			closeItem.setDisable(true);
			edgeDetItem.setDisable(true);
			revertItem.setDisable(true);

			fileMenu.getItems().addAll(openItem, closeItem);
			toolsMenu.getItems().addAll(edgeDetItem, revertItem);
			MenuBar menuBar = new MenuBar();
			menuBar.getMenus().add(fileMenu);
			menuBar.getMenus().add(toolsMenu);

			root.getChildren().add(menuBar);

			stage.setScene(new Scene(root, 500, 500));
			stage.show();



	}

	public static void main(String[] args) {

		launch(args);

	}

}