import { RecognizedIntent } from '../types/nl.js';
export interface LLMFallbackConfig {
    minPatternConfidence: number;
    maxProcessingTime: number;
    temperature: number;
    enableCaching: boolean;
    cacheTTL: number;
    maxRetries: number;
}
export declare class LLMFallbackSystem {
    private static instance;
    private config;
    private openRouterConfig;
    private cache;
    private promptService;
    private constructor();
    static getInstance(config?: Partial<LLMFallbackConfig>): LLMFallbackSystem;
    private initializeConfig;
    recognizeIntent(text: string, patternConfidence?: number, context?: Record<string, unknown>): Promise<RecognizedIntent | null>;
    private buildUserPrompt;
    private callLLMWithRetry;
    private parseLLMResponse;
    private convertToRecognizedIntent;
    private convertParametersToEntities;
    private getConfidenceLevel;
    private isValidIntent;
    private getCachedResult;
    private cacheResult;
    private getCacheKey;
    private cleanupExpiredCache;
    updateConfig(config: Partial<LLMFallbackConfig>): void;
    getConfig(): LLMFallbackConfig;
    clearCache(): void;
    getCacheStats(): {
        size: number;
        hitRate: number;
        expiredEntries: number;
    };
}
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