import { ImportConfigFields } from './MainElement';
export interface AppTransformRequest {
    prompt: string;
    columns: string[];
}
export interface AppMappingRequest {
    fields: string[] | ImportConfigFields;
    headers: string[];
}
export interface AppTransformResponse {
    code: string;
}
export interface AppMappingResponse {
    mapping: {
        [field: string]: string;
    };
}
/**
 * Singleton client for handling all API communications with the ImportOK backend.
 * Centralizes token management and API calls for transformations and mappings.
 */
export declare class AppClient {
    private readonly token;
    private static instance;
    private static readonly TRANSFORM_ENDPOINT;
    private static readonly MAPPING_ENDPOINT;
    private appUrl;
    private constructor();
    /**
     * Initialize the AppClient singleton with a token.
     * Must be called before using getInstance().
     */
    static initialize(token: string): AppClient;
    /**
     * Get the singleton instance of AppClient.
     * Must call initialize() first.
     */
    static getInstance(): AppClient;
    /**
     * Reset the singleton instance (mainly for testing purposes).
     */
    static reset(): void;
    /**
     * Call the AI API to get transformation code
     */
    getTransformation(request: AppTransformRequest): Promise<AppTransformResponse>;
    /**
     * Call the App API to get field mappings
     */
    getMapping(request: AppMappingRequest): Promise<AppMappingResponse>;
}