import { HTTPClient } from './http-client.js';
import './tools/utils.js';
import 'zod';
import './resources/metadata.js';

interface OAuth2TokenResponse {
    accessToken: string;
    expiresIn: number;
}
interface OAuth2TokenManagerConfig {
    /**
     * HTTPClient instance for making token requests
     */
    client: HTTPClient;
    /**
     * Provider name for error messages
     */
    provider: string;
    /**
     * Token endpoint path (e.g., '/oauth2/token'). Include any required
     * query string directly (e.g. '/oauth/accesstoken?grant_type=client_credentials').
     */
    tokenEndpoint: string;
    /**
     * HTTP method the token endpoint expects. Defaults to 'POST' (the
     * common case: client_id/secret or grant_type in a form/JSON body).
     * Use 'GET' for providers that pass `grant_type` as a query param
     * instead (e.g. MoneyGram) - `requestBody` is ignored in that case.
     */
    method?: 'GET' | 'POST';
    /**
     * Credentials for Basic auth (username:password format)
     */
    credentials: {
        username: string;
        password: string;
    };
    /**
     * Adapter function to extract token and expiry from provider response
     */
    responseAdapter: (response: Record<string, any>) => OAuth2TokenResponse;
    /**
     * Optional request body
     */
    requestBody?: string | URLSearchParams;
    /**
     * Optional request headers
     */
    requestHeaders?: Record<string, string>;
    /**
     * Optional expiry buffer in seconds (defaults to 300 = 5 minutes)
     */
    expiryBuffer?: number;
    /**
     * Optional additional headers to include in getAuthHeaders()
     */
    authHeaders?: Record<string, string>;
}
/**
 * Manages OAuth2 access tokens with automatic refresh and caching
 */
declare class OAuth2TokenManager {
    private _accessToken;
    private _expiresAt;
    private _refreshPromise;
    private readonly config;
    constructor(config: OAuth2TokenManagerConfig);
    /**
     * Get a valid access token, refreshing if necessary
     */
    getToken: () => Promise<string>;
    private _refreshToken;
    /**
     * Get authorization headers for API requests
     */
    getAuthHeaders: () => Promise<Record<string, string>>;
}

export { OAuth2TokenManager, type OAuth2TokenManagerConfig, type OAuth2TokenResponse };