#lang racket/gui
(require "structs.rkt"
         "look.rkt"
         "utils.rkt")
(provide interpret)

;temporary hard-coded player and room with items for testing, before implementing procgen
(define room1 (room "A DARK ROOM"
                    (pos 0 0)
                    (list (armor "LEATHER CAP" (pos 5 9) 1 'helmet 2))
                    (dim 0 0)))
(add-to-inventory! room1 (entity "CHEST"
                           room1
                           (list (weapon "BIG SWORD"  (pos 5 5) 4 'sword  5))))

(define plyr (player "YOU"
                     room1
                     '()
                     'human 20 '() 50))
(add-to-inventory! room1 plyr)

(define (interpret in)
  (let ([command (string-upcase in)])
    (if (or (string=? command "TYPE HERE...") (string=? command ""))
        "You need to type something in the box."
        (let* ([tokens (string-split command)]
               [verb (first tokens)]
               [args (rest tokens)])
          (case verb
            [("LOOK") (look args room1)]
            [("TAKE") (take args room1 plyr)]
            [else (~a "I don't understand the verb " verb ".")])))))

(define (take args where who)
  (if (empty? args)
      "You need to say what to take."
      (let* ([args-str (string-join args)]
             [split-str (string-split args-str " FROM ")]
             [what-str (first split-str)]
             [from-str (if (= 1 (length split-str))
                           '()
                           (last split-str))]
             [from (if (empty? from-str)
                       where
                       (find-object-by-name from-str where))]
             [what (find-object-by-name what-str from)])
        (when (empty? from-str)
          (set! from-str (object-name where)))
        (if what
            (if (creature? what)
                "You can't take a living thing."
                (if (entity? what)
                    "You can't take something with an inventory."
                    (move-obj! what from who)))
            (~a "There isn't a \"" what-str "\" in this area.")))))