import type { ActionRegistry, EditAction } from "./types.js";
export interface UseImageHistoryResult {
    currentImageUrl: string;
    currentBlob: Blob | null;
    /** Synchronous read of the current image URL — valid immediately after `applyActions`. */
    getCurrentImageUrl: () => string;
    /** Synchronous read of the current blob — valid immediately after `applyActions`. */
    getCurrentBlob: () => Blob | null;
    canUndo: boolean;
    canRedo: boolean;
    /** True while an async replay (undo/redo) is in progress. */
    replaying: boolean;
    /** Applies a new blob to the current state and records it in history. Returns the new object URL. */
    applyActions: (blob: Blob, actions: EditAction[]) => string;
    undo: () => void;
    redo: () => void;
    reset: () => void;
}
/**
 * Manages undo/redo history for the image editor using action replay.
 *
 * Only action lists are stored — no intermediate blobs. Undo/redo replays
 * all remaining actions from the source image, keeping memory usage minimal
 * regardless of history depth. Only one blob is in memory at a time.
 */
export declare function useImageHistory(sourceUrl: string, registry: ActionRegistry): UseImageHistoryResult;