import { Engine, EngineAbortPromise } from "../engine";
import { Interceptor } from "../interceptor";
import { RequestContext } from "../context/request-context";
import { ResponseContext } from "../context/response-context";
export declare type RequestEnv<Environment extends string> = Record<Environment, string | undefined>;
export declare type RequestClient = "browser" | "wechatminiapp";
export declare function createRequestor<Environment extends string = any, Response = any>(engine: Engine<Response>, requestContext?: RequestContext, requestEnv?: RequestEnv<Environment>): Requestor<Response, Environment>;
export declare function createFetchRequestor<Environment extends string = any>(requestContext?: RequestContext, requestEnv?: RequestEnv<Environment>): Requestor<Response, Environment>;
export declare function createWxmpRequestor<Environment extends string = any>(requestContext?: RequestContext, requestEnv?: RequestEnv<Environment>): Requestor<any, Environment>;
export declare function createAutoAdaptRequestor<Environment extends string = any>(requestContext?: RequestContext, requestEnv?: RequestEnv<Environment>): Requestor<any, Environment>;
export declare class Requestor<Response = any, Environment extends string = any> {
    /** 所属客户端，目前仅识别浏览器端 */
    static readonly client: RequestClient;
    /** 浏览器端相关工具属性，方法 */
    static readonly browser: {
        PROTOCOL: string;
        HOSTNAME: string;
        PORT: string;
        ORIGIN: string;
        IS_LOCAL: boolean;
        IS_DOMAIN: boolean;
        HOSTNAME_HYPHEN_PREFIX: string;
        HOSTNAME_HYPHEN_SUFFIX: string;
    };
    /** 获取环境变量 */
    static processenv<T = string>(name: string[]): T | undefined;
    /** 请求环境对象集合 */
    readonly requestEnv?: RequestEnv<Environment>;
    /** 当前请求环境 */
    env?: Environment[number];
    /** 请求引擎 */
    readonly engine: Engine<Response>;
    /** 请求拦截器 */
    readonly interceptors: Interceptor<Response>[];
    /** 全局请求上下文 */
    requestContext: RequestContext;
    /** 请求池 */
    readonly requestPool: Map<string, Promise<Response> | EngineAbortPromise<Response>>;
    constructor(engine: Engine<Response>, requestContext?: RequestContext, requestEnv?: RequestEnv<Environment>);
    /** 发起请求 */
    request<Result = unknown>(requestContext: RequestContext): Promise<ResponseContext<Result, Response>>;
    /** 切换请求环境 */
    switch(env: Environment): this;
    /** 使用拦截器 */
    use(...interceptors: Interceptor[]): this;
}