/**
 * Pricing table types for hazo_llm_api.
 *
 * Each entry is keyed by "<provider>/<model>" (e.g. "openai/gpt-4o-2024-08-06").
 * Token-based services use *_per_1m_usd rates; image gen uses per_image_usd.
 */
export type PricingKind = "text" | "image" | "embedding" | "audio";
export interface PricingEntryText {
    kind: "text";
    input_per_1m_usd: number;
    output_per_1m_usd: number;
    /** Anthropic prompt-cache hits / OpenAI cached input tokens — discounted rate. */
    cached_input_per_1m_usd?: number;
}
export interface PricingEntryImage {
    kind: "image";
    per_image_usd: number;
}
export interface PricingEntryEmbedding {
    kind: "embedding";
    input_per_1m_usd: number;
}
export interface PricingEntryAudio {
    kind: "audio";
    input_per_min_usd?: number;
    output_per_min_usd?: number;
}
export type PricingEntry = PricingEntryText | PricingEntryImage | PricingEntryEmbedding | PricingEntryAudio;
export type PricingTable = Record<string, PricingEntry>;
export type FinishReason = "stop" | "length" | "content_filter" | "tool_calls" | "error";
export interface UsageTokens {
    input: number;
    output: number;
    total: number;
    /** Provider-reported cached input tokens (Anthropic cache hits, OpenAI cached tokens). */
    cached_input?: number;
}
export interface UsageAttempt {
    provider: string;
    success: boolean;
    error_code?: string;
    latency_ms: number;
}
export interface UsageInfo {
    /** The actual model used (as reported by the provider). */
    model: string;
    provider: string;
    tokens: UsageTokens;
    /** null when pricing for this model is unknown. */
    cost_usd?: number;
    /** Exact pricing-table entry applied — frozen audit trail. */
    pricing_applied?: PricingEntry;
    latency_ms: number;
    finish_reason?: FinishReason;
    /** Populated only when a cascade actually fired (more than one attempt). */
    attempts?: UsageAttempt[];
}
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