(ns advent.screens.title
  (:require [play-clj.core :refer :all]
            [play-clj.ui :refer :all]
            [play-clj.utils :refer :all]
            [play-clj.g2d :refer :all]
            [advent.utils :as utils]
            [advent.screens.scene :as scene]
            [advent.screens.dialogue :as dialogue]
            [advent.screens.title :as title]
            [advent.screens.inventory :as inventory]
            [advent.screens.safe :as safe]
            )
  (:import [com.badlogic.gdx.graphics Pixmap Pixmap$Filter Texture Texture$TextureFilter]
           [com.badlogic.gdx.graphics.g2d TextureRegion]
           [com.badlogic.gdx.scenes.scene2d.utils Align]
           [com.badlogic.gdx Application Audio Files Game Gdx Graphics Input
            InputMultiplexer InputProcessor Net Preferences Screen]))

(defn update-fade [entities current-time]
  (if (:fade entities)
    (let [time-shown (- current-time (:start-time entities))
          entities (assoc-in entities [:fade :opacity] (max (- 1.0 time-shown) 0.0))]
      (if (= 0.0 (get-in entities [:fade :opacity]))
        (do (utils/play-sound (:music entities))
          (dissoc entities :fade))
        entities))
    entities))

(defscreen title-screen
  :on-show
  (fn [screen entities]
    (update! screen :renderer (stage) :camera (orthographic))
    (let [start-playing (assoc (label "Start Game" (style :label (utils/get-font "ego/font.fnt") (color :red))) :x 0 :y 850 :width 1280)
          music (utils/make-music "intro.ogg")]
      (label! start-playing :set-alignment Align/center)
      
      {:overlay  (assoc (texture "title-overlay.png" ) :x 0 :y 0 :scale-x 4 :scale-y 4 :origin-x 0 :origin-y 0)
       :fade (assoc (texture "black.png")
                    :scale-x 80
                    :scale-y 80 
                    :opacity 1.0)
       :music music
       :start-showing? false
       :start-playing start-playing}))

  :on-render
  (fn [screen [entities]]
    (let [entities (-> entities
                       (update-in [:start-time] #(or % (:total-time screen)))
                       (update-fade (:total-time screen)))]
      (render! screen [ (:overlay entities) (:start-playing entities) (:fade entities)])
      entities))

  :show-screen (fn [entities]
                 entities)

  :on-mouse-moved (fn [screen [entities]]
                    nil)

  :on-touch-up (fn [screen [entities]]
                 (utils/stop-sound (:music entities))
                 (set-screen! @(resolve 'advent.core/advent) scene/scene dialogue/talking-screen dialogue/choice-screen inventory/inventory-screen safe/safe-screen)
                 nil)

  :on-resize (fn [screen entities]
               (size! screen 1280 960)))