import Registry from './Registry.js';
import Component from './Component.js';
import TransformComponent from '../components/TransformComponent.js';
import TagComponent from '../components/TagComponent.js';
import BoundsComponent from '../components/BoundsComponent.js';
/**
 * Interface representing an abstract class constructor.
 */
export interface AbstractConstructor<T> {
    prototype: T;
    name: string;
}
/**
 * Base class for all entities in the game world.
 */
export default abstract class GameObject {
    /** Unique identifier for the game object. */
    readonly id: string;
    private _components;
    /**
     * The transform component for this object, managing position and scale.
     */
    get transform(): TransformComponent;
    /**
     * The tag component for this object, managing its name and rendering order.
     */
    get metadata(): TagComponent;
    /**
     * The bounds component for this object, defining its physical area.
     */
    get bounds(): BoundsComponent | undefined;
    /**
     * Sets the bounds component for this object.
     */
    set bounds(val: BoundsComponent | undefined);
    /**
     * initialises a new instance of a GameObject.
     * @param tag A descriptive name for the object.
     * @param zIndex The rendering order (higher numbers are drawn on top).
     * @param sourceId Hidden identifier linking runtime object to its source code location.
     */
    constructor(tag?: string, zIndex?: number, sourceId?: string);
    /**
     * Listens for an event on this object's event bus.
     * @param type The event type.
     * @param callback The function to run when the event occurs.
     */
    on(type: string, callback: (event: CustomEvent) => void): void;
    /**
     * Stops listening for an event on this object's event bus.
     * @param type The event type.
     * @param callback The function to remove.
     */
    off(type: string, callback: (event: CustomEvent) => void): void;
    /**
     * Emits a custom event on this object's event bus.
     * @param type The event type.
     * @param detail Optional data to pass with the event.
     */
    emit(type: string, detail?: unknown): void;
    /**
     * Adds a component to this game object.
     * @param component The component instance to add.
     */
    addComponent(component: Component): void;
    /**
     * Removes a component from this game object by its class.
     * @param componentClass The class of the component to remove.
     */
    removeComponent<T extends Component>(componentClass: AbstractConstructor<T>): void;
    /**
     * Checks if this object has a component of the specified class.
     * @param componentClass The class to check for.
     * @returns True if the component exists.
     */
    hasComponent<T extends Component>(componentClass: AbstractConstructor<T>): boolean;
    /**
     * Retrieves a component from this object by its class.
     * @param componentClass The class of the component to retrieve.
     * @returns The component instance, or undefined if not found.
     */
    getComponent<T extends Component>(componentClass: AbstractConstructor<T>): T | undefined;
    /**
     * Registers this object with the active scene or global engine loop.
     */
    registerSelf(): void;
    /** Static helper for tests to bypass Registry circularity if mocked. */
    static _registry: typeof Registry;
    /**
     * Removes this object from the active scene or global engine loop.
     */
    destroySelf(): void;
}