/**
 * Pricing configuration for different LLM providers
 */
export interface ProviderPricing {
    provider: string;
    model: string;
    costPerThousandTokens: {
        input: number;
        output: number;
    };
}
/**
 * Cost tracking data for a single request
 */
export interface CostEntry {
    id: string;
    timestamp: Date;
    provider: string;
    model: string;
    inputTokens: number;
    outputTokens: number;
    cost: number;
    cacheHit: boolean;
    savingsAmount?: number;
}
/**
 * Cost savings analysis result
 */
export interface CostAnalysis {
    totalRequests: number;
    cacheHitRate: number;
    totalCost: number;
    totalSavings: number;
    roiPercentage: number;
    avgCostPerRequest: number;
    avgSavingsPerRequest: number;
    periodStart: Date;
    periodEnd: Date;
    topSavingQueries: Array<{
        query: string;
        savings: number;
        hitCount: number;
    }>;
}
/**
 * Tracks costs and calculates savings from LLM API caching
 */
export declare class CostTracker {
    private costEntries;
    private pricingConfig;
    constructor(customPricing?: ProviderPricing[]);
    /**
     * Record a cost entry for an API request
     */
    recordCost(entry: Omit<CostEntry, 'id' | 'timestamp' | 'cost' | 'savingsAmount'>): CostEntry;
    /**
     * Calculate cost for a request based on token usage
     */
    private calculateCost;
    /**
     * Get comprehensive cost analysis for a time period
     */
    getCostAnalysis(periodDays?: number): CostAnalysis;
    /**
     * Get recent cost entries
     */
    getRecentEntries(limit?: number): CostEntry[];
    /**
     * Get cost breakdown by provider and model
     */
    getCostBreakdown(periodDays?: number): Array<{
        provider: string;
        model: string;
        totalCost: number;
        totalSavings: number;
        requestCount: number;
        hitRate: number;
    }>;
    /**
     * Add custom pricing for a provider/model
     */
    addPricing(pricing: ProviderPricing): void;
    /**
     * Get all configured pricing
     */
    getPricing(): ProviderPricing[];
    /**
     * Clear all cost entries (for testing)
     */
    clear(): void;
}
export declare const globalCostTracker: CostTracker;
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