/**
 * EntityRegistry.ts
 *
 * Entity management: creation, destruction, tag-based queries,
 * archetype tracking, and hierarchical parent-child relationships.
 *
 * @module ecs
 */
export interface Entity {
    id: number;
    name: string;
    active: boolean;
    tags: Set<string>;
    components: Set<string>;
    parent: number | null;
    children: number[];
    createdAt: number;
}
export declare class EntityRegistry {
    private entities;
    private nextId;
    private recycledIds;
    private tagIndex;
    private nameIndex;
    create(name?: string, tags?: string[]): Entity;
    destroy(id: number): boolean;
    get(id: number): Entity | undefined;
    getByName(name: string): Entity | undefined;
    getByTag(tag: string): Entity[];
    getByComponents(...componentTypes: string[]): Entity[];
    getAll(): Entity[];
    getActiveCount(): number;
    getTotalCount(): number;
    addTag(id: number, tag: string): boolean;
    removeTag(id: number, tag: string): boolean;
    hasTag(id: number, tag: string): boolean;
    setParent(childId: number, parentId: number): boolean;
    getChildren(id: number): Entity[];
    registerComponent(entityId: number, componentType: string): boolean;
    unregisterComponent(entityId: number, componentType: string): boolean;
    hasComponent(entityId: number, componentType: string): boolean;
    setActive(id: number, active: boolean): void;
}
//# sourceMappingURL=EntityRegistry.d.ts.map