(ns advent.core
  (:require [play-clj.core :refer :all]
            [play-clj.ui :refer :all]
            [play-clj.utils :refer :all]
            [play-clj.g2d :refer :all]
            [clojure.pprint])
  (:import [com.badlogic.gdx.graphics Pixmap Pixmap$Filter]))

(def scale 4)
(def +screen-width+ 320)
(def +screen-height+ 240)

(defn cursor [filename index]
  (let [base-cursor (pixmap filename)
        target-width (* 16 scale)
        target-height (* 16 scale)
        resized (Pixmap. target-width target-height (.getFormat base-cursor))]
    (Pixmap/setFilter Pixmap$Filter/NearestNeighbour)
    (pixmap! resized :draw-pixmap base-cursor (* index 16) 0 16 16
              0 0 target-width target-height)
    resized ))

(defn right-click [screen entities]
  (if (= (button-code :right) (:button screen))
    (for [entity entities]
      (if (= (:id entity) "cursor")
        (let [entity (assoc entity :cursor-index (case (:cursor-index entity)
                                                   0 1
                                                   1 0))]
          (input! :set-cursor-image (cursor "cursor.png" (:cursor-index entity)) 0 0 )
          entity)
        entity))))

(defscreen main-screen
  :on-show
  (fn [screen entities]
    (update! screen :renderer (stage) :camera (orthographic))
    (let [player-sheet (texture! (texture "player.png") :split 18 36)
          _ (input! :set-cursor-image (cursor "cursor.png" 0) 0 0)
          background (texture "bg5.png")]
      [{:id "cursor" :cursor-index 0}
       (assoc background :origin-y 0 :origin-x 0 :ego? false :x 0 :y 0 :scale-x 1 :scale-y 1)
       {:right  (animation 0.075 (for [i (range 8)]
                                 (texture  (aget player-sheet 0 i))))
        :left (animation 0.075 (for [i (range 8)]
                                 (texture  (aget player-sheet 1 i))))
        :anim (animation 0.075 (for [i (range 8)]
                                 (texture  (aget player-sheet 0 i))))
        :x 0 :y 75 :origin-x 0 :origin-y 0 :x-velocity 1
        :ego? true}]))
  
  :on-render
  (fn [screen entities]
    (clear!)
    (render! screen (for [entity entities]
                      (if (:ego? entity)
                        (merge (animation->texture screen (:anim entity))
                               {:ego? (:ego? entity) :x (+  (:x entity) (:x-velocity entity)) :y 75 :origin-x 0 :origin-y 0 :anim (:anim entity) :x-velocity (:x-velocity entity)  :left (:left entity) :right (:right entity)}
                               (when (> (:x entity) (width screen))
                                 {:x-velocity -1 :anim (:left entity)})
                               (when (< (:x entity) 0)
                                 {:x-velocity 1 :anim (:right entity)}))

                        entity))))
  :on-resize (fn [screen entities]
               (size! screen 320 240))

  #_:on-mouse-moved #_(fn [screen entities] 
                    (for [entity entities]
                      (if (= (:id entity) "cursor")
                        (let [{:keys [x y]} (input->screen screen (min +screen-width+ (max 0 (:input-x screen)))  (max 0 (min +screen-height+  (:input-y screen))))]
                          (assoc entity :x x :y y))
                      entity)))

  :on-touch-down (fn [screen entities]
                   (right-click screen entities))

  #_:on-scrolled
  #_(fn [screen entities]
    (set! (. (:camera screen) zoom) (min 1.5 (max (+ (.zoom (:camera screen)) (* 0.01 (:amount screen))) 1)))
    nil)) 

(defgame advent
  :on-create
  (fn [this]
    (set-screen! this main-screen)
    #_(input! :set-cursor-catched true)))