import type { AnagramOptions } from './types';
/**
 * * Generates unique anagrams of a given word. Optionally looks up valid anagrams inside a provided dictionary.
 *
 * @param word The word from which to generate anagrams. Converted to lowercase internally.
 *
 * @param options Controls the output limit and optional dictionary lookup.
 *
 * @returns A list of unique, lowercase anagrams. The original word (lowercased) is always included as the first element.
 *
 * @remarks
 * - When a dictionary is provided, only anagrams found inside that dictionary are returned.
 * - The dictionary is cached internally (with converting to lowercase) using a `WeakMap`, allowing garbage collection of unused inputs.
 * - Repeated letters are handled efficiently using a per-level set to avoid duplicate permutations.
 *
 * @example
 * generateAnagrams("east", { limit: 10 });
 *
 * @example
 * generateAnagrams("tone", {
 *   dictionary: ["tone", "note", "one"],
 *   limit: "all"
 * });
 */
export declare function generateAnagrams(word: string, options?: AnagramOptions): Lowercase<string>[];