/**
 * Cost Estimator
 *
 * Functions for estimating costs before processing.
 * Used to give users price quotes and set spending limits.
 */
import type { AIProvider, CostEstimate, CostEstimateInput, EmbeddingProvider } from './types';
/**
 * Default assumptions for cost estimation.
 * These are based on analysis of real chat data.
 */
export declare const ESTIMATION_DEFAULTS: {
    /** Average tokens per chat message */
    readonly avgTokensPerMessage: 80;
    /** Ratio of activities found to messages processed */
    readonly activitiesPerMessage: number;
    /** Messages per classification batch */
    readonly classificationBatchSize: 50;
    /** Average output tokens per classified activity */
    readonly outputTokensPerActivity: 150;
    /** Percentage of activities that are geocodable */
    readonly geocodableRatio: 0.7;
    /** Low estimate multiplier (80% confidence) */
    readonly lowMultiplier: 0.6;
    /** High estimate multiplier (80% confidence) */
    readonly highMultiplier: 1.8;
};
/**
 * Estimate token count for a text string.
 * Uses a simple character-based heuristic.
 *
 * Rough rule: ~4 characters per token for English text.
 */
export declare function estimateTokenCount(text: string): number;
/**
 * Estimate tokens for a batch of messages.
 */
export declare function estimateMessageTokens(messageCount: number, avgTokensPerMessage?: number): number;
/**
 * Estimate number of activities that will be found.
 */
export declare function estimateActivityCount(messageCount: number): number;
/**
 * Estimate number of geocodable activities.
 */
export declare function estimateGeocodableCount(activityCount: number): number;
/**
 * Estimate the full cost of processing a chat.
 *
 * @param input - Estimation input parameters
 * @param aiProvider - AI provider to use (default: 'google')
 * @param embeddingProvider - Embedding provider to use (default: 'openai')
 * @returns Cost estimate with breakdown
 */
export declare function estimateProcessingCost(input: CostEstimateInput, aiProvider?: AIProvider, embeddingProvider?: EmbeddingProvider): CostEstimate;
/**
 * Quick estimate for display (just returns cents).
 * Simpler version for UI price display.
 */
export declare function quickEstimateCents(messageCount: number, aiProvider?: AIProvider): number;
/**
 * Format an estimate for display.
 */
export declare function formatEstimate(estimate: CostEstimate): string;
/**
 * Format estimate with breakdown.
 */
export declare function formatEstimateDetailed(estimate: CostEstimate): string;
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