export interface RouteHandler {
  (req: any, res: any, ...args: any[]): void | Promise<void | RouteHandler[]>;
}

export type StaticResponse = {
  code?: Number;
  redirect?: string;
  headers?: {
    [key: string]: string;
  };
  body?: string | any;
};

export type RouteParams = {
  [key: string]: any;
};

export type RouteOptions = {
  path?: "*" | string;
  method?: "*" | string;
  response?: string | StaticResponse;
  // handler会继承父路由指定的handler列表
  handler?: RouteHandler | RouteHandler[];
  params?: RouteParams;
  children?: RouteOptions[];
};

export type HttpMethod = "GET" | "POST" | "PUT" | "DELETE" | "OPTIONS" | "HEAD";

export type Route = {
  path: "*" | string | RegExp;
  method: "*" | HttpMethod[];
  handler: RouteHandler[];
  params?: RouteParams;
};

export declare class RouteMatcher {
  routes: Route[];
  constructor(routes: RouteOptions[], defaultRoute?: RouteOptions);
  matchRoute(path: string, method: string): Route | void;
}

export type HookHandler = (
  req: any,
  res: any,
  ...args: any[]
) => void | Promise<void>;

export type HookTasks = {
  onRoute(route: Route, req: any, res: any): void | Promise<void>;
  onStart: HookHandler;
  onEnd: HookHandler;
  onFinish: HookHandler;
  onError(err: any, req: any, res: any): void | Promise<void>;
};

export declare class ExpressRouter extends RouteMatcher {
  toResponseHandler(StaticResponse): RouteHandler;
  isHeadersSent(req: any, res: any): boolean;
  handle(hookTasks: HookTasks, req: any, res: any): Promise<void>;
}