// Type definitions for express-http-proxy-2 1.1.0
// Project: https://github.com/leonheess/express-http-proxy-2

import { RequestHandler, Request, Response, NextFunction } from "express";
import { RequestOptions, IncomingHttpHeaders, OutgoingHttpHeaders, ClientRequest, IncomingMessage } from "http";

declare namespace proxy {
    interface ProxyOptions {
        /**
         * The byte limit of the body. This is the number of bytes or any string
         * format supported by `bytes`, for example `1000`, `'500kb'` or `'3mb'`.
         * See https://github.com/stream-utils/raw-body/blob/master/index.d.ts
         */
        limit?: number | string | undefined;
        proxyErrorHandler?: ((
            err: any,
            res: Response,
            next: NextFunction
        ) => any) | undefined;
        proxyReqPathResolver?: ((req: Request) => string | Promise<string>) | undefined;
        proxyReqOptDecorator?: ((
            proxyReqOpts: RequestOptions,
            srcReq: Request
        ) => RequestOptions | Promise<RequestOptions>) | undefined;
        userResHeaderDecorator?: ((
            headers: IncomingHttpHeaders,
            userReq: Request,
            userRes: Response,
            proxyReq: ClientRequest,
            proxyRes: IncomingMessage
        ) => OutgoingHttpHeaders) | undefined;
        userResDecorator?: ((
            proxyRes: IncomingMessage,
            proxyResData: any,
            userReq: Request,
            userRes: Response
        ) => Buffer | string | Promise<Buffer | string>) | undefined;
        /**
         * The filter option can be used to limit what requests are proxied.
         * Return true to continue to execute proxy; return false-y to skip proxy for this request.
         */
        filter?: ((req: Request, res: Response) => boolean | Promise<boolean>) | undefined;
        skipToNextHandlerFilter?: ((proxyRes: IncomingMessage) => boolean) | undefined;
        proxyReqBodyDecorator?: ((bodyContent: any, srcReq: Request) => any) | undefined;
        preserveHostHdr?: boolean | undefined;
        parseReqBody?: boolean | undefined;
        memoizeHost?: boolean | undefined;
        https?: boolean | undefined;
        reqAsBuffer?: boolean | undefined;
        reqBodyEncoding?: string | null | undefined;
        timeout?: number | undefined;
    }
}

declare function proxy(
    host: string | ((req: Request) => string),
    options?: proxy.ProxyOptions
): RequestHandler;

export = proxy;