// Type definitions for serve-static 1.7.1
// Project: https://github.com/expressjs/serve-static
// Definitions by: Uros Smolnik <https://github.com/urossmolnik/>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped

/* =================== USAGE ===================

    import * as serveStatic from "serve-static";
    app.use(serveStatic("public/ftp", {"index": ["default.html", "default.htm"]}))

 =============================================== */

/// <reference types="express-serve-static-core" />

import * as express from "express-serve-static-core";
import * as m from "mime";

/**
 * Create a new middleware function to serve files from within a given root directory.
 * The file to serve will be determined by combining req.url with the provided root directory.
 * When a file is not found, instead of sending a 404 response, this module will instead call next() to move on to the next middleware, allowing for stacking and fall-backs.
 */
declare function serveStatic(root: string, options?: serveStatic.ServeStaticOptions): express.Handler;

declare namespace serveStatic {
    var mime: typeof m;
    interface ServeStaticOptions {
        /**
         * Set how "dotfiles" are treated when encountered. A dotfile is a file or directory that begins with a dot (".").
         * Note this check is done on the path itself without checking if the path actually exists on the disk.
         * If root is specified, only the dotfiles above the root are checked (i.e. the root itself can be within a dotfile when when set to "deny").
         * The default value is 'ignore'.
         * 'allow' No special treatment for dotfiles
         * 'deny' Send a 403 for any request for a dotfile
         * 'ignore' Pretend like the dotfile does not exist and call next()
         */
        dotfiles?: string;

        /**
         * Enable or disable etag generation, defaults to true.
         */
        etag?: boolean;

        /**
         * Set file extension fallbacks. When set, if a file is not found, the given extensions will be added to the file name and search for.
         * The first that exists will be served. Example: ['html', 'htm'].
         * The default value is false.
         */
        extensions?: string[];

        /**
         * Let client errors fall-through as unhandled requests, otherwise forward a client error.
         * The default value is false.
         */
        fallthrough?: boolean;

        /**
         * By default this module will send "index.html" files in response to a request on a directory.
         * To disable this set false or to supply a new index pass a string or an array in preferred order.
         */
        index?: boolean | string | string[];

        /**
         * Enable or disable Last-Modified header, defaults to true. Uses the file system's last modified value.
         */
        lastModified?: boolean;

        /**
         * Provide a max-age in milliseconds for http caching, defaults to 0. This can also be a string accepted by the ms module.
         */
        maxAge?: number | string;

        /**
         * Redirect to trailing "/" when the pathname is a dir. Defaults to true.
         */
        redirect?: boolean;

        /**
         * Function to set custom headers on response. Alterations to the headers need to occur synchronously.
         * The function is called as fn(res, path, stat), where the arguments are:
         * res the response object
         * path the file path that is being sent
         * stat the stat object of the file that is being sent
         */
        setHeaders?: (res: express.Response, path: string, stat: any) => any;
    }
    function serveStatic(root: string, options?: ServeStaticOptions): express.Handler;
}

export = serveStatic;
