(ns advent.core
  (:require [play-clj.core :refer :all]
            [play-clj.ui :refer :all]
            [play-clj.g2d :refer :all]))

(defscreen main-screen
  :on-show
  (fn [screen entities]
    (update! screen :renderer (stage) :camera (orthographic))
    (let [player-sheet (texture! (texture "player.png") :split 18 36)
          background (texture "bg3.png")]
      [(assoc background :scale-y 1.0 :scale-x 1.0 :origin-y 0 :origin-x 0 :ego? false :x -60 :y -34)
       {:right  (animation 0.1 (for [i (range 8)]
                                 (texture  (aget player-sheet 0 i))))
        :left (animation 0.1 (for [i (range 8)]
                                 (texture  (aget player-sheet 1 i))))
        :anim (animation 0.1 (for [i (range 8)]
                                 (texture  (aget player-sheet 0 i))))
        :x 0 :y 25 :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 0 :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]
    (height! screen 135))

  :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)))