import type { DecisionError, DecisionPreparedMedia, DecisionState, NeurolinkCredentials } from "../types/index.js";
import { SystemOneDecisionProvider } from "./systemOneDecision.js";
/**
 * Perplexity Provider — the `decide` inference type only.
 *
 * `pplx-decider-v1-27b` answers the same typed `noul` / `choice` / `score`
 * questions as the other decision providers, in one batched pass, and also reads
 * images. It is a hosted API with a public endpoint, so unlike the self-hosted
 * providers it needs only a key. The request loop, retries, auth circuit
 * breaker and answer parsing are shared with every decision provider in
 * {@link SystemOneDecisionProvider}.
 *
 * The key is the same `PERPLEXITY_API_KEY` the Sonar text provider reads, so a
 * host that has configured that provider has also configured this one.
 *
 * @see https://docs.perplexity.ai/api-reference/decisions-post
 */
export declare class PerplexityDeciderProvider extends SystemOneDecisionProvider {
    private readonly apiKey;
    private readonly baseURL;
    constructor(modelName?: string, sdk?: unknown, _region?: string, credentials?: NeurolinkCredentials["perplexityDecider"]);
    protected getDefaultModel(): string;
    protected vendorLabel(): string;
    protected vendorDisplayName(): string;
    protected decisionApiKey(): string;
    protected missingKeyMessage(): string;
    protected missingConfigMessage(): string | undefined;
    protected decisionEndpoint(): string;
    protected decisionHeaders(): Record<string, string>;
    /**
     * `model` is always sent: the API answers 400 to a request that names none.
     * Images travel inside `state`, which becomes an array of the caller's state
     * followed by one OpenAI-style `image_url` part per image; the API has no
     * separate images field and rejects unknown ones.
     */
    protected buildDecisionBody(state: DecisionState, questions: Record<string, Record<string, unknown>>, model: string, media?: DecisionPreparedMedia): Record<string, unknown>;
    protected parseDecisionError(status: number, payload: unknown, requestId: string | undefined): DecisionError;
    /**
     * A 401, a 404 and a 504 carry no request id, so this is undefined for them.
     */
    protected readRequestId(headers: Headers): string | undefined;
    protected defaultTimeoutMs(questionCount: number): number | undefined;
    /**
     * `Retry-After` is whole seconds on a 429, or an HTTP date. Anything else, a
     * zero and a date already past all read as undefined, so the retry takes the
     * default backoff instead of going out at once. `Number()` is not used: it
     * reads "0x10" as 16 and "1e3" as 1,000.
     */
    protected readRetryAfterMs(headers: Headers): number | undefined;
}