module Update.HandleServerReply exposing (apply_to)

-- Elm -------------------------------------------------------------------------
import Http

-- Shared ----------------------------------------------------------------------
import Struct.Flags

-- Main Menu -------------------------------------------------------------------
import Struct.Error
import Struct.Event
import Struct.Model
import Struct.Player
import Struct.ServerReply

--------------------------------------------------------------------------------
-- TYPES -----------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
-- LOCAL -----------------------------------------------------------------------
--------------------------------------------------------------------------------
apply_command : (
      Struct.ServerReply.Type ->
      (Struct.Model.Type, (List (Cmd Struct.Event.Type))) ->
      (Struct.Model.Type, (List (Cmd Struct.Event.Type)))
   )
apply_command command current_state =
   case command of
      Struct.ServerReply.Okay -> current_state

--------------------------------------------------------------------------------
-- EXPORTED --------------------------------------------------------------------
--------------------------------------------------------------------------------
apply_to : (
      Struct.Model.Type ->
      (Result Http.Error (List Struct.ServerReply.Type)) ->
      (Struct.Model.Type, (Cmd Struct.Event.Type))
   )
apply_to model query_result =
   case query_result of
      (Result.Err error) ->
         (
            (Struct.Model.invalidate
               (Struct.Error.new Struct.Error.Networking (toString error))
               model
            ),
            Cmd.none
         )

      (Result.Ok commands) ->
         let
            (new_model, elm_commands) =
               (List.foldl (apply_command) (model, [Cmd.none]) commands)
         in
            (
               new_model,
               (
                  case elm_commands of
                     [] -> Cmd.none
                     [cmd] -> cmd
                     _ -> (Cmd.batch elm_commands)
               )
            )