import { AnthropicUsageBuckets } from '@standardagents/provider-pricing';
export { AnthropicModelPricing, AnthropicUsageBuckets, calculateAnthropicUsageCost, getAnthropicModelPricing } from '@standardagents/provider-pricing';
import Anthropic from '@anthropic-ai/sdk';

/**
 * Known Anthropic model pricing for request cost calculation.
 *
 * The Anthropic Messages API reports token usage (including cache buckets)
 * but no dollar cost, and the Models API exposes no pricing data — so cost
 * is derived here from the raw usage buckets and a maintained price table.
 * This is more accurate than a flat promptTokens * inputPrice calculation
 * because Anthropic bills the prompt in three differently-priced buckets:
 *
 * - uncached input tokens: base input rate
 * - cache writes: 1.25x input (5-minute TTL) or 2x input (1-hour TTL)
 * - cache reads: 0.1x input
 *
 * Thinking tokens are billed as ordinary output tokens (already included in
 * output_tokens), so no separate reasoning rate applies.
 */

type AnthropicUsage = Anthropic.Messages.Usage;
/**
 * Extract billing buckets from an API usage object. When the per-TTL cache
 * creation breakdown is absent, all cache writes are assumed 5-minute TTL
 * (the API default and by far the most common case).
 */
declare function extractUsageBuckets(usage: AnthropicUsage): AnthropicUsageBuckets;

export { extractUsageBuckets };