/**
 * Backend Factory
 *
 * Provides access to ComfyUI backends.
 *
 * DEFAULT: Local ComfyUI (for most operations)
 * OPT-IN: RunPod (for heavy video operations)
 *
 * Usage:
 *   // Get default (local) backend
 *   const local = getBackend();
 *   await local.imagine({ ... });
 *
 *   // Explicitly get RunPod for heavy operations
 *   const runpod = getRunPodBackend();
 *   await runpod.lipsync({ ... });
 *
 *   // Or use the smart getter that picks based on operation
 *   const backend = getBackendFor("lipsync"); // Returns RunPod if configured
 *
 * Environment:
 *   COMFYUI_URL          - Local ComfyUI URL (default: http://localhost:8188)
 *   COMFYUI_INPUT_DIR    - Local input directory
 *   COMFYUI_OUTPUT_DIR   - Local output directory
 *   RUNPOD_ENDPOINT_ID   - RunPod endpoint (optional)
 *   RUNPOD_API_KEY       - RunPod API key (optional)
 */
export * from "./types.js";
export { LocalBackend } from "./local.js";
export { RunPodBackend } from "./runpod.js";
import { ComfyBackend } from "./types.js";
import { LocalBackend } from "./local.js";
import { RunPodBackend } from "./runpod.js";
/**
 * Get the LOCAL backend (default)
 *
 * Use this for most operations: imagine, portrait, controlnet, tts, etc.
 */
export declare function getBackend(): ComfyBackend;
/**
 * Get the local ComfyUI backend
 */
export declare function getLocalBackend(): LocalBackend;
/**
 * Get the RunPod backend (for GPU-heavy operations)
 *
 * Use this for: lipsync, img2video, animation, etc.
 * Throws if RunPod is not configured.
 */
export declare function getRunPodBackend(): RunPodBackend;
/**
 * Smart backend selector based on operation type
 *
 * Returns RunPod for GPU-heavy operations (if configured), local otherwise.
 *
 * @param operation - The operation type (e.g., "lipsync", "imagine", "portrait")
 */
export declare function getBackendFor(operation: string): ComfyBackend;
/**
 * Check if RunPod is configured
 */
export declare function isRunPodConfigured(): boolean;
/**
 * Check if local ComfyUI is available
 */
export declare function isLocalAvailable(): Promise<boolean>;
/**
 * Clear cached backends (useful for testing)
 */
export declare function clearBackendCache(): void;
/**
 * Get status of all backends
 */
export declare function getBackendStatus(): Promise<{
    local: {
        configured: boolean;
        healthy: boolean;
        error?: string;
    };
    runpod: {
        configured: boolean;
        healthy: boolean;
        error?: string;
    };
}>;