import { Config } from '@backstage/config';
/**
 * Generic Langfuse Metrics API v2 integration (litellm.langfuse.*).
 *
 * Powers the "Quality scores" card on the Insights tab with independent
 * answer-quality data. Nothing here is bound to a specific deployment:
 * the server version and the trace↔user join key vary, so a misconfigured
 * or v3 server degrades to `{configured:false}` instead of erroring.
 */
export interface LangfuseConfig {
    /** Mount GET /insights/quality and query Langfuse. Default false. */
    enabled: boolean;
    /** Langfuse host, e.g. https://langfuse.example.com. */
    baseUrl: string | null;
    /** Langfuse public key (Basic-auth username). */
    publicKey: string | null;
    /** Langfuse secret key (Basic-auth password). */
    secretKey: string | null;
    /**
     * The Langfuse observation field holding the LiteLLM user id, e.g.
     * 'userId'. Deployments whose agents tag traces differently change this
     * one key. Default 'userId'.
     */
    userIdField: string;
}
export declare function readLangfuseConfig(config: Config): LangfuseConfig;
/** True only when the integration is enabled AND fully credentialed. */
export declare function isLangfuseConfigured(cfg: LangfuseConfig): cfg is LangfuseConfig & {
    baseUrl: string;
    publicKey: string;
    secretKey: string;
};