// Type definitions for child-process-promise 2.2
// Project: https://github.com/patrick-steele-idem/child-process-promise
// Definitions by: Luis Paulo <https://github.com/TheDSCPL>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 3.0

/// <reference types="node" />

import {
    ChildProcess,
    ExecFileOptionsWithBufferEncoding, ExecFileOptionsWithOtherEncoding,
    ExecFileOptionsWithStringEncoding,
    ExecOptions,
    ForkOptions,
    SpawnOptions
} from 'child_process';

/**
 * Simple wrapper around the child_process module that makes use of promises
 */

export interface PromiseResult<Enc extends string|Buffer> {
    childProcess: ChildProcess;
    stdout: Enc;
    stderr: Enc;
}

export interface SpawnPromiseResult extends PromiseResult<string> {
    code: number;
}

export interface ChildProcessPromise<T> extends Promise<T> {
    childProcess: ChildProcess;
}

export interface Options {
    /**
     * Pass an additional capture option to buffer the result of stdout and/or stderr
     * Default: []
     */
    capture?: []|['stdout'|'stderr']|['stdout', 'stderr']|['stderr', 'stdout'] | undefined;
    /**
     * Array of the numbers that should be interpreted as successful execution codes
     * Default: [0]
     */
    successfulExitCodes?: number[] | undefined;
}

export function  exec(
    command: Readonly<string>,
    options: Readonly<Options & { encoding: "buffer" | null } & ExecOptions>
): ChildProcessPromise<PromiseResult<Buffer>>;
export function  exec(
    command: Readonly<string>,
    options: Readonly<Options & { encoding?: BufferEncoding | undefined } & ExecOptions>
): ChildProcessPromise<PromiseResult<string>>;
export function  exec(
    command: Readonly<string>,
    options: Readonly<Options & { encoding?: string | undefined } & ExecOptions>
): ChildProcessPromise<PromiseResult<string | Buffer>>;
export function  exec(
    command: Readonly<string>,
    options?: Readonly<Options & ExecOptions>
): ChildProcessPromise<PromiseResult<string>>;

export function  execFile(
    file: Readonly<string>,
    options: Readonly<Options & ExecFileOptionsWithBufferEncoding>
): ChildProcessPromise<PromiseResult<Buffer>>;
export function  execFile(
    file: Readonly<string>,
    args: ReadonlyArray<string> | null,
    options: Readonly<Options & ExecFileOptionsWithBufferEncoding>
): ChildProcessPromise<PromiseResult<Buffer>>;
export function  execFile(
    file: Readonly<string>,
    options: Readonly<Options & ExecFileOptionsWithStringEncoding>
): ChildProcessPromise<PromiseResult<string>>;
export function  execFile(
    file: Readonly<string>,
    options: Readonly<Options & ExecFileOptionsWithOtherEncoding>
): ChildProcessPromise<PromiseResult<string | Buffer>>;
export function  execFile(
    file: Readonly<string>,
    args: ReadonlyArray<string> | null,
    options: Readonly<Options & ExecFileOptionsWithOtherEncoding>
): ChildProcessPromise<PromiseResult<string | Buffer>>;
export function  execFile(
    file: Readonly<string>,
    args?: ReadonlyArray<string> | null,
    options?: Readonly<Options & ExecFileOptionsWithStringEncoding>
): ChildProcessPromise<PromiseResult<string>>;

export function  spawn(
    command: Readonly<string>,
    args?: ReadonlyArray<string> | null,
    options?: Readonly<Options & SpawnOptions>
): ChildProcessPromise<SpawnPromiseResult>;

export function fork(
    modulePath: string,
    args?: ReadonlyArray<string>,
    options?: Readonly<Options & ForkOptions>
): ChildProcessPromise<SpawnPromiseResult>;