package abstractfactory;

public class Application {

    // The client holds references to the Abstract Factory and Abstract Products.
    // It never imports LightButton, DarkButton, or any concrete class.
    private final UIFactory factory;
    private Button submitButton;
    private TextField usernameField;

    public Application(UIFactory factory) {
        this.factory = factory;  // theme is injected; client doesn't decide
    }

    public void buildUI() {
        // Ask the factory — get consistent products from the same family
        submitButton = factory.createButton();
        usernameField = factory.createTextField();
    }

    public void render() {
        System.out.println("Rendering login screen:");
        usernameField.render();
        submitButton.render();
    }

    public void simulateSubmit() {
        submitButton.onClick();
    }
}