package jalviewfx.controllers.engine;

import java.util.HashMap;

import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.beans.property.DoubleProperty;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.layout.StackPane;
import javafx.util.Duration;
import application.App.Screens;

public class ScreensController extends StackPane {
	private HashMap<String, Node> screens = new HashMap<>();

	public void addScreen(String name, Node screen) {
		screens.put(name, screen);
	}

	public boolean loadScreen(String name, String resource) {
		try {
			FXMLLoader myLoader = new FXMLLoader(getClass().getResource(resource));
			Parent loadScreen = (Parent) myLoader.load();
			ControlledScreen myScreenControler = ((ControlledScreen) myLoader.getController());
			myScreenControler.setScreenParent(this);
			addScreen(name, loadScreen);
			return true;
		} catch (Exception e) {
			System.out.println(e.getMessage());
			return false;
		}
	}

	public boolean setScreen(final Screens screen) {

		if (screens.get(screen.getName()) != null) { // screen loaded
			final DoubleProperty opacity = opacityProperty();

			// Is there is more than one screen
			if (!getChildren().isEmpty()) {
				@SuppressWarnings({ "unchecked", "rawtypes" })
				Timeline fade = new Timeline(new KeyFrame(Duration.ZERO, new KeyValue(opacity, 1.0)), new KeyFrame(new Duration(1000),

				new EventHandler() {
					@Override
					public void handle(Event t) {
						// remove displayed screen
						getChildren().remove(0);
						// add new screen
						getChildren().add(0, screens.get(screen.getName()));
						Timeline fadeIn = new Timeline(new KeyFrame(Duration.ZERO, new KeyValue(opacity, 0.0)), 
								new KeyFrame(new Duration(800), new KeyValue(opacity, 1.0)));
						fadeIn.play();
					}

				}, new KeyValue(opacity, 0.0)));
				fade.play();
			} else {
				// no one else been displayed, then just show
				setOpacity(0.0);
				getChildren().add(screens.get(screen.getName()));
				Timeline fadeIn = new Timeline(new KeyFrame(Duration.ZERO, new KeyValue(opacity, 0.0)), 
						new KeyFrame(new Duration(2500), new KeyValue(opacity, 1.0)));
				fadeIn.play();
			}
			return true;
		} else {
			System.out.println("screen hasn't been loaded!\n");
			return false;
		}
	}

	public boolean unloadScreen(String name) {
		if (screens.remove(name) == null) {
			System.out.println("Screen didn't exist");
			return false;
		} else {
			return true;
		}
	}
}