import {
  middleware,
  Middleware as GenericMiddleware
} from '@pawelgalazka/middleware'
import { useMiddlewares } from './middlewares'

export { useMiddlewares } from './middlewares'
export { help, withHelp } from './middlewares/helper'
export { rawArgs } from './middlewares/rawArgsParser'

export type CommandFunction = (options: ICLIOptions, ...args: any[]) => any
export type CLIParams = string[]
export type CommandsModule = ICommandsDictionary | CommandFunction
export type Middleware = GenericMiddleware<IMiddlewareArguments>

export interface ICLIOptions {
  [key: string]: number | string | boolean
}

export interface ICommandsDictionary {
  [namespace: string]: CommandsModule
}

export interface IMiddlewareArguments {
  options: ICLIOptions
  params: CLIParams
  definition: CommandsModule
  namespace: string
  command?: CommandFunction
  reject: (error: Error) => void
}

export class CLIError extends Error {}

export function cli(
  definition: CommandsModule,
  middlewares: Middleware[] = useMiddlewares()
) {
  middleware<IMiddlewareArguments>(middlewares)({
    definition,
    namespace: '',
    options: {},
    params: [],
    reject: error => {
      throw error
    }
  })
}

import {
  middleware,
  Middleware as GenericMiddleware
} from '@pawelgalazka/middleware'
import { useMiddlewares } from './middlewares'

export { useMiddlewares } from './middlewares'
export { help, withHelp } from './middlewares/helper'
export { rawArgs } from './middlewares/rawArgsParser'

export type CommandFunction = (options: ICLIOptions, ...args: any[]) => any
export type CLIParams = string[]
export type CommandsModule = ICommandsDictionary | CommandFunction
export type Middleware = GenericMiddleware<IMiddlewareArguments>

export interface ICLIOptions {
  [key: string]: number | string | boolean
}

export interface ICommandsDictionary {
  [namespace: string]: CommandsModule
}

export interface IMiddlewareArguments {
  options: ICLIOptions
  params: CLIParams
  definition: CommandsModule
  namespace: string
  command: CommandFunction
  reject: (error: Error) => void
}

export class CLIError extends Error {}

export function cli(
  definition: CommandsModule,
  middlewares: Middleware[] = useMiddlewares()
) {
  middleware<IMiddlewareArguments>(middlewares)({
    command: () => null,
    definition,
    namespace: '',
    options: {},
    params: [],
    reject: error => {
      throw error
    }
  })
}

--- 
+++ 
@@ -26,7 +26,7 @@
   params: CLIParams
   definition: CommandsModule
   namespace: string
-  command: CommandFunction
+  command?: CommandFunction
   reject: (error: Error) => void
 }
 
@@ -37,7 +37,6 @@
   middlewares: Middleware[] = useMiddlewares()
 ) {
   middleware<IMiddlewareArguments>(middlewares)({
-    command: () => null,
     definition,
     namespace: '',
     options: {},
Make command optional for IMiddlewareArguments
