(.module:
  [lux #*
   [abstract
    ["." monad (#+ do)]]
   [control
    ["." try (#+ Try)]
    [security
     ["!" capability]]
    [concurrency
     ["." promise (#+ Promise)]]]
   [world
    ["." file (#+ Path File Directory)]
    ["." console (#+ Console)]]]
  ["." /// #_
   [command (#+ Command)]
   ["#" profile]
   ["#." action (#+ Action)]])

(def: (clean_files! root)
  (-> (Directory Promise) (Promise (Try Any)))
  (do {! ///action.monad}
    [nodes (: (Promise (Try (List (File Promise))))
              (!.use (\ root files) []))
     _ (monad.map ! (function (_ node)
                      (!.use (\ node delete) []))
                  nodes)]
    (wrap [])))

(def: #export success
  "Success")

(def: #export failure
  "Failure: No 'target' defined for clean-up.")

(def: #export (do! console fs profile)
  (-> (Console Promise) (file.System Promise) (Command Any))
  (case (get@ #///.target profile)
    (#.Some target)
    (do {! ///action.monad}
      [target (: (Promise (Try (Directory Promise)))
                 (!.use (\ fs directory) target))
       _ (loop [root target]
           (do !
             [_ (..clean_files! root)
              subs (: (Promise (Try (List (Directory Promise))))
                      (!.use (\ root directories) []))
              _ (monad.map ! recur subs)]
             (!.use (\ root discard) [])))]
      (console.write_line ..success console))
    
    #.None
    (console.write_line ..failure console)))