package com.bham.pij.assignments.edgedector;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.ImageView;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.scene.image.Image;
import java.io.File;
import java.nio.file.NoSuchFileException;

public class GUI extends Application {
    Image raw;
    ImageView rawImageView;
    VBox root = new VBox();
    VBox images = new VBox();
    Group rawImageCopy = new Group();
    final Scene scene = new Scene(root, 500, 500);

    @Override
    public void start(Stage stage){

        stage.setTitle("Image Filter");

        // File menu
        Menu fileMenu = new Menu("File");

        // File menu items
        MenuItem openItem = new MenuItem("Open");
        MenuItem closeItem = new MenuItem("Close");
        closeItem.setDisable(true);
        // Tools Menu
        Menu toolsMenu = new Menu("Tools");

        // Tools menu items
        MenuItem edgeDetItem = new MenuItem("Edge Detection");
        MenuItem revertItem = new MenuItem("Revert");
        edgeDetItem.setDisable(true);
        revertItem.setDisable(true);

        // Setting up each Menu with the corresponting items
        fileMenu.getItems().addAll(openItem, closeItem);
        toolsMenu.getItems().addAll(edgeDetItem, revertItem);

        // Menu item functions

        // Open item Action
        openItem.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent o) {

                FileChooser fileChooser = new FileChooser();
                fileChooser.setTitle("Open Image File");

                File file = fileChooser.showOpenDialog(stage);

                if (file != null){
                    loadImageFile(file);
                    openItem.setDisable(true);
                    edgeDetItem.setDisable(false);
                    closeItem.setDisable(false);
                }
            }
        });

        // Close item Action
        closeItem.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent c) {
                closeItem.setDisable(true);
                openItem.setDisable(false);
                edgeDetItem.setDisable(true);
                revertItem.setDisable(true);
                images.getChildren().clear();
            }
        });

        // Edge Detection item Action
        edgeDetItem.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent actionEvent) {
                EdgeDetector obj = new EdgeDetector();
                obj.filterImage(raw);

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

        // Revert item Action
        revertItem.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent actionEvent) {

            images.getChildren().clear();
            root.getChildren().add(rawImageCopy);

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

        //Setting up the Menu Bar
        final MenuBar menuBar = new MenuBar();
        menuBar.getMenus().addAll(fileMenu, toolsMenu);

        root.getChildren().add(menuBar);

        stage.setScene(scene);
        stage.show();
    }

    private void loadImageFile (File file ){
        Image image = new Image("file:" + file.getPath());
        ImageView imageView = new ImageView(image);
        ImageView rawImage = new ImageView(image);

        raw = image;
        rawImageView = imageView;

        images.getChildren().add(imageView);
        rawImageCopy.getChildren().add(rawImage);
        root.getChildren().add(images);
    }



    public static void main(String[] args) {
        launch(args);
    }
}