package app.state;

import com.google.common.eventbus.EventBus;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import domain.common.Mode;
import domain.events.ImageChangedEvent;
import domain.events.ModeChangedEvent;
import domain.events.listeners.Listener;
import domain.image.Image;

import java.util.ArrayList;
import java.util.List;

/**
 * Represents the global state of the app
 */
@Singleton
public class AppState extends State {
    private Mode mode;
    private Image rgbImage;
    private final List<AppStateListener> listeners = new ArrayList<>();

    @Inject
    public AppState() {}

    public void subscribe(AppStateListener listener) {
        listeners.add(listener);
    }

    public void unsubscribe(AppStateListener listener) {
        listeners.remove(listener);
    }

    public void setMode(Mode mode) {
        this.mode = mode;
        listeners.forEach(listener -> listener.onModeChanged(mode));
    }

    public void setImage(Image image) {
        this.rgbImage = image;
        listeners.forEach(listener -> listener.onImageChanged(image));
    }

    public Image getImage() {
        return rgbImage;
    }

    public Mode getMode() {
        return mode;
    }
}