/**
 * RuntimeBridge.ts
 *
 * The top-level orchestrator that wires all engine subsystems together.
 * Provides a single API surface for:
 *   parse → run → update → serialize
 *
 * Owns the ECS World, EventBus, ThemeEngine, and SystemScheduler.
 */
import { World } from '../ecs';
import { ComponentRegistry } from '../ecs';
import { SystemScheduler } from '../ecs';
import type { SystemPhase } from '../ecs';
import { EventBus } from '@holoscript/core';
import { ThemeEngine } from '@holoscript/core';
import { StyleResolver } from '@holoscript/core';
import { SceneRunner } from './SceneRunner';
import { TraitBinder } from './TraitBinder';
import type { HSPlusNode } from '@holoscript/core';
import type { UIEntity as Entity } from '@holoscript/core';
export interface SystemConfig {
    name: string;
    execute?: (dt: number) => void;
    update?: (dt: number) => void;
    phase?: SystemPhase;
    priority?: number;
    enabled?: boolean;
    dependencies?: string[];
    group?: string;
    requiredComponents?: string[];
}
export interface RuntimeConfig {
    theme?: string;
    systems?: SystemConfig[];
}
export declare class RuntimeBridge {
    readonly world: World;
    readonly eventBus: EventBus;
    readonly themeEngine: ThemeEngine;
    readonly styleResolver: StyleResolver;
    readonly componentRegistry: ComponentRegistry;
    readonly systemScheduler: SystemScheduler;
    readonly traitBinder: TraitBinder;
    readonly sceneRunner: SceneRunner;
    private running;
    private totalTime;
    constructor(config?: RuntimeConfig);
    /**
     * Load and execute parsed AST.
     */
    loadScene(root: HSPlusNode): Entity;
    /**
     * Run one frame of the simulation.
     */
    update(delta: number): void;
    /**
     * Start the update loop.
     */
    start(): void;
    /**
     * Stop the update loop.
     */
    stop(): void;
    /**
     * Unload the current scene.
     */
    unloadScene(): void;
    /**
     * Check if running.
     */
    isRunning(): boolean;
    /**
     * Get total elapsed time.
     */
    getTotalTime(): number;
    /**
     * Reset everything.
     */
    reset(): void;
    private countNodes;
}
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