/// <reference types="express" />

declare module "istanbul-middleware" {
    import * as express from "express";

    type Matcher = (file: string) => boolean;
    type PostLoadHookFn = (file: any) => {};
    type PostLoadHook = (matcherfn: Matcher, transformer: any, verbose: boolean) => PostLoadHookFn;

    export function hookLoader(matcherOrRoot: Matcher | string, opts?: {
        postLoadHook?: PostLoadHook | undefined;
        verbose?: boolean | undefined;
        // and istanbul.Instrumenter(...opts)
    }): void;

    export function createHandler(opts?: {
        resetOnGet?: boolean | undefined;
    }): any;

    type ClientMatcher = (req: express.Request) => boolean;
    type PathTransformer = (req: express.Request) => string;

    export function createClientHandler(root: string, opts?: {
        matcher?: ClientMatcher | undefined;
        pathTransformer?: PathTransformer | undefined;
        verbose?: boolean | undefined;
    }): any;
}