import * as http from 'node:http';
import { TransportRequestOptions, TransportRequestParams } from '../Transport';
import { RequestBody, TransportResult, Context } from '../types';
import { Connection } from '../connection';
/**
 * Enum of all registered middleware names.
 * Each middleware should have a unique name for identification and debugging.
 */
export declare enum MiddlewareName {
    PRODUCT_CHECK = "product-check"
}
/**
 * Priority values for each middleware.
 * Lower values execute first. Middleware is sorted by priority before execution.
 */
export declare const MiddlewarePriority: Record<MiddlewareName, number>;
export interface MiddlewareContext {
    readonly request: {
        readonly method: string;
        readonly path: string;
        readonly body?: RequestBody | null;
        readonly querystring?: string;
        readonly headers: Readonly<http.IncomingHttpHeaders>;
    };
    readonly params: Readonly<TransportRequestParams>;
    readonly options: Readonly<TransportRequestOptions>;
    readonly meta: {
        readonly requestId: any;
        readonly name: string | symbol;
        readonly context: Context | null;
        readonly connection: Connection | null;
        readonly attempts: number;
    };
}
export interface MiddlewareResult {
    continue?: boolean;
}
export interface Middleware {
    readonly name: MiddlewareName;
    readonly priority?: number;
    onResponse?: (ctx: MiddlewareContext, result: TransportResult) => MiddlewareResult | undefined;
}