import type { OAuthCredentials } from "@mariozechner/pi-ai";
import GigaChat from "gigachat";
import type { ChatCompletionChunk, Chat as GigaChatChat } from "gigachat/interfaces";
export declare const GIGACHAT_CERTIFICATES_URL = "https://developers.sber.ru/docs/ru/gigachat/certificates";
export declare const GIGACHAT_VALID_SCOPES: readonly ["GIGACHAT_API_PERS", "GIGACHAT_API_B2B", "GIGACHAT_API_CORP"];
export declare const GIGACHAT_DEFAULT_SCOPE = "GIGACHAT_API_PERS";
export declare const GIGACHAT_DEFAULT_BUSINESS_SCOPE = "GIGACHAT_API_B2B";
export declare const GIGACHAT_DEFAULT_AUTH_MODE = "basic";
export declare const GIGACHAT_EXPIRY_BUFFER_MS: number;
export type GigaChatScope = (typeof GIGACHAT_VALID_SCOPES)[number];
export type GigaChatAuthMode = "basic" | "token";
export type GigaChatAccountType = "personal" | "business";
export type GigaChatBaseUrlChoice = "default" | "custom";
export type GigaChatStoredCredentials = OAuthCredentials & {
    authMode?: GigaChatAuthMode;
    accountType?: GigaChatAccountType;
    authorizationKey?: string;
    scope?: GigaChatScope;
    baseUrl?: string;
    user?: string;
    password?: string;
};
export declare function normalizeAuthorizationKey(input: string): string;
export declare function normalizeUser(input: string): string;
export declare function normalizePassword(input: string): string;
export declare function normalizeScope(input: string, fallbackScope?: GigaChatScope): GigaChatScope;
export declare function getDefaultScope(accountType: GigaChatAccountType): GigaChatScope;
export declare function normalizeAccountType(input: string): GigaChatAccountType;
export declare function normalizeAuthMode(input: string): GigaChatAuthMode;
export declare function normalizeBaseUrlChoice(input: string): GigaChatBaseUrlChoice;
export declare function normalizeBaseUrl(input: string, fallbackBaseUrl?: string): string;
export declare function normalizeStoredBaseUrl(input: unknown): string | undefined;
export declare function parseExpiresAt(expiresAt: unknown): number;
export declare function withCertificateHint(error: unknown): Error;
export declare class PiGigaChatClient extends GigaChat {
    get accessTokenData(): {
        access_token?: unknown;
        expires_at?: unknown;
    } | undefined;
    get accessToken(): string | undefined;
    updateTokenQuietly(): Promise<void>;
    streamRobust(payload: GigaChatChat, abortSignal?: AbortSignal): AsyncGenerator<ChatCompletionChunk>;
    private requestStreamBody;
}
export declare function createTokenClient(authorizationKey: string, scope: GigaChatScope, baseUrl: string): PiGigaChatClient;
export declare function createPasswordClient(user: string, password: string, baseUrl: string): PiGigaChatClient;
export declare function isAccessToken(value: string): boolean;