// Type definitions for opn 3.0.2
// Project: https://github.com/sindresorhus/opn
// Definitions by: Shinnosuke Watanabe <https://github.com/shinnn>,
//                 Maxime LUCE <https://github.com/SomaticIT>
// Definitions: https://github.com/borisyankov/DefinitelyTyped

/// <reference path="../node/node.d.ts" />

declare namespace Opn {
    export interface Options {
        /**
         * Wait for the opened app to exit before calling the `callback`. 
         * If `false` it's called immediately when opening the app.
         * On Windows you have to explicitly specify an app for it to be able to wait.
         */
        wait?: boolean;
        
        /**
         * Specify the app to open the target with, or an array with the app and app arguments.
         * The app name is platform dependent. Don't hard code it in reusable modules. 
         * Eg. Chrome is `google chrome` on OS X, `google-chrome` on Linux and `chrome` on Windows.
         */
        app?: string | string[];
    }
}

declare module "opn" {
    import * as cp from "child_process";

    interface DefaultFunction {
        /**
         * Uses the command open on OS X, start on Windows and xdg-open on other platforms.
         * 
         * Returns the spawned child process. 
         * You'd normally not need to use this for anything, but it can be useful if you'd like 
         * to attach custom event listeners or perform other operations directly on the spawned process.
         * 
         * @param target - The thing you want to open. Can be a URL, file, or executable. Opens in the default app for the file type. Eg. URLs opens in your default browser.
         */
        (target: string): cp.ChildProcess;

        /**
         * Uses the command open on OS X, start on Windows and xdg-open on other platforms.
         * 
         * Returns the spawned child process. 
         * You'd normally not need to use this for anything, but it can be useful if you'd like 
         * to attach custom event listeners or perform other operations directly on the spawned process.
         * 
         * @param target - The thing you want to open. Can be a URL, file, or executable. Opens in the default app for the file type. Eg. URLs opens in your default browser.
         * @param callback- Called when the opened app exits, or if `wait: false`, immediately when opening.
         */
        (target: string, callback: (err: Error) => void): cp.ChildProcess;

        /**
         * Uses the command open on OS X, start on Windows and xdg-open on other platforms.
         * 
         * Returns the spawned child process. 
         * You'd normally not need to use this for anything, but it can be useful if you'd like 
         * to attach custom event listeners or perform other operations directly on the spawned process.
         * 
         * @param target - The thing you want to open. Can be a URL, file, or executable. Opens in the default app for the file type. Eg. URLs opens in your default browser.
         * @param options - Options to be passed to opn.
         */
        (target: string, options: Opn.Options): cp.ChildProcess;

        /**
         * Uses the command open on OS X, start on Windows and xdg-open on other platforms.
         * 
         * Returns the spawned child process. 
         * You'd normally not need to use this for anything, but it can be useful if you'd like 
         * to attach custom event listeners or perform other operations directly on the spawned process.
         * 
         * @param target - The thing you want to open. Can be a URL, file, or executable. Opens in the default app for the file type. Eg. URLs opens in your default browser.
         * @param options - Options to be passed to opn.
         * @param callback- Called when the opened app exits, or if `wait: false`, immediately when opening.
         */
        (target: string, options: Opn.Options, callback: (err: Error) => void): cp.ChildProcess;
    }

    const opn: DefaultFunction;
    export = opn;
}