/**
 * GraphQL Client Module for Upwork API
 *
 * This module provides a GraphQL client for interacting with Upwork's GraphQL API.
 * It handles authentication, request formatting, and error handling.
 */
import { GraphQLClientOptions, GraphQLResponse, QueryOptions } from "../types";
import { UpworkAuth } from "./auth";
export declare class UpworkGraphQLClient {
    private auth;
    private baseUrl;
    private graphqlUrl;
    private organizationId?;
    /**
     * Create a GraphQL client instance
     * @param auth - Authentication instance (UpworkAuth)
     * @param options - Additional options
     */
    constructor(auth: UpworkAuth, options?: GraphQLClientOptions);
    /**
     * Execute a GraphQL query
     * @param query - GraphQL query string
     * @param variables - Query variables
     * @param options - Additional options
     * @returns Query response
     */
    query<T = any>(query: string, variables?: Record<string, any>, options?: QueryOptions): Promise<GraphQLResponse<T>>;
    /**
     * Execute a GraphQL mutation
     * @param mutation - GraphQL mutation string
     * @param variables - Mutation variables
     * @param options - Additional options
     * @returns Mutation response
     */
    mutate<T = any>(mutation: string, variables?: Record<string, any>, options?: QueryOptions): Promise<GraphQLResponse<T>>;
    /**
     * Set organization ID for requests
     * @param organizationId - Organization ID
     */
    setOrganizationId(organizationId: string): void;
    /**
     * Handle GraphQL errors
     * @param errors - Array of GraphQL errors
     * @returns Formatted error
     */
    private handleGraphQLErrors;
    /**
     * Handle HTTP request errors
     * @param error - Error object
     * @returns Formatted error
     */
    private handleRequestError;
}
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