/**
 * @fileoverview Main search engine that orchestrates search operations.
 * Provides a unified interface for all filter modes.
 */
import type { IndexedItem, SearchResult, SearchOptions, FilterMode } from './types';
/**
 * Main search function that applies the appropriate strategy based on filter mode.
 *
 * @param {IndexedItem[]} indexedItems - Array of pre-indexed items
 * @param {SearchOptions} options - Search options including query, filterMode, maxResults
 * @returns {SearchResult} Search result with matching IDs, total count, and truncation flag
 *
 * @example
 * const result = search(indexedItems, {
 *   query: 'System Grid',
 *   filterMode: 'smart',
 *   maxResults: 100
 * });
 * // { ids: ['1', '2', '3'], total: 3, truncated: false }
 */
export declare function search(indexedItems: IndexedItem[], options: SearchOptions): SearchResult;
/**
 * Determines if filtering should be offloaded to a Web Worker.
 *
 * @param {number} itemCount - Number of items to search
 * @param {FilterMode} filterMode - Current filter mode
 * @param {number} workerThreshold - Threshold for offloading to worker
 * @returns {boolean} True if filtering should use Web Worker
 */
export declare function shouldUseWorker(itemCount: number, filterMode: FilterMode, workerThreshold: number): boolean;
/**
 * Checks if Web Workers are supported in the current environment.
 *
 * @returns {boolean} True if Web Workers are supported
 */
export declare function isWorkerSupported(): boolean;
/**
 * Gets the effective filter mode, falling back if necessary.
 * If fuzzy mode is requested but Workers aren't supported, falls back to smart.
 *
 * @param {FilterMode} requestedMode - The requested filter mode
 * @returns {FilterMode} The effective filter mode to use
 */
export declare function getEffectiveFilterMode(requestedMode: FilterMode): FilterMode;