/**
 * TokenOptimizer: Core optimization logic using Toonify
 */
import type { OptimizationResult, ToolMetadata, OptimizationConfig } from './types.js';
import { CacheOptimizer, LRUCache } from './caching/index.js';
export declare class TokenOptimizer {
    private config;
    private tokenEncoder;
    private cacheOptimizer;
    private resultCache;
    constructor(config?: Partial<OptimizationConfig>);
    /**
     * Main optimization method
     */
    optimize(content: string, metadata?: ToolMetadata): Promise<OptimizationResult>;
    /**
     * Detect if content is structured data (JSON/CSV/YAML)
     */
    private detectStructuredData;
    /**
     * Simple CSV detection heuristic
     */
    private looksLikeCSV;
    /**
     * Parse simple CSV to array of objects
     */
    private parseSimpleCSV;
    /**
     * Count tokens in text with language awareness
     */
    private countTokens;
    /**
     * Check if tool should be skipped
     */
    private shouldSkipTool;
    /**
     * Generate cache key from content and metadata
     * Includes toolName to prevent false cache hits across different tools
     */
    private generateCacheKey;
    /**
     * Validate resultCache configuration
     * Throws error if configuration is invalid
     */
    private validateResultCacheConfig;
    /**
     * Get cache optimizer instance for external access
     */
    getCacheOptimizer(): CacheOptimizer;
    /**
     * v0.4.0: Get LRU cache instance for external access
     */
    getResultCache(): LRUCache<OptimizationResult>;
    /**
     * v0.4.0: Clear optimization result cache
     */
    clearResultCache(): void;
    /**
     * v0.4.0: Clean up expired cache entries
     */
    cleanupExpiredCache(): number;
    /**
     * v0.4.0: Get combined cache statistics
     */
    getCacheStats(): {
        resultCache: import('./caching/cache-types.js').LRUCacheStats;
        promptCache: import('./caching/cache-types.js').CacheMetrics;
    };
}
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