(import enum [Enum])

(defclass Direction [Enum]
  (setv UP "UP")
  (setv DOWN "DOWN")
  (setv LEFT "LEFT")
  (setv RIGHT "RIGHT")

  (defn [staticmethod] from-move [move]
    #((.x-from-move Direction move)
       (.y-from-move Direction move)))

  (defn [staticmethod] x-from-move [move]
    (if (>= (get move 0) 0)
        Direction.RIGHT
        Direction.LEFT))

  (defn [staticmethod] y-from-move [move]
    (if (>= (get move 0) 0)
        Direction.DOWN
        Direction.UP))

  (defn [staticmethod] x-between-points [point1 point2]
    (let [delta-x (abs (- (get point1 0) (get point2 0)))]
      (if (>= delta-x 0)
          Direction.RIGHT
          Direction.LEFT))))

(defn neg [value]
  (* -1 value))

(defn invert [move]
  #((neg (get move 0))
     (neg (get move 1))))

(defn merge-moves [moves]
  (let [end-move #(0 0)]
    (for [move moves]
      (setv end-move
            #((+ (get end-move 0) (get move 0))
               (+ (get end-move 1) (get move 1)))))
    end-move))

(defn sub-points [point1 point2]
  #((- (get point2 0) (get point1 0))
     (- (get point2 1) (get point2 1))))