/**
 * UsernameChecker - Main class for checking username availability across sites
 */
import type { CheckOptions, CheckResult, SiteConfig, DebugOptions, BatchCheckOptions, BatchCheckResult } from './types.js';
/**
 * Main class for checking username availability across multiple platforms
 */
export declare class UsernameChecker {
    private options;
    private readonly repository;
    private proxyAgent;
    private controller;
    private lifecycle;
    private cache;
    constructor(options?: Partial<CheckOptions>);
    /**
     * Check username availability across all matching sites
     */
    check(username: string, options?: Pick<CheckOptions, 'sites' | 'includeNSFW' | 'includeExcluded' | 'onProgress' | 'signal' | 'debug'>): Promise<CheckResult[]>;
    /**
     * Check multiple usernames across sites with optional callback for progress
     */
    checkBatch(usernames: string[], options?: BatchCheckOptions): Promise<BatchCheckResult[]>;
    /**
     * Check a single site
     */
    checkSite(username: string, siteKey: string, config?: SiteConfig, signal?: AbortSignal, debug?: DebugOptions): Promise<CheckResult>;
    private buildDebugData;
    private buildDiagnostics;
    /**
     * Abort any running check operations
     */
    abort(): void;
    /**
     * Get site count (convenience method)
     */
    static getSiteCount(): number;
    /**
     * Check if a site is supported (convenience method)
     */
    static hasSite(key: string): boolean;
    /**
     * Get a specific site configuration (convenience method)
     */
    static getSite(key: string): SiteConfig | undefined;
}