(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.tween :as tween]
            [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.utils.viewport FitViewport]
           [com.badlogic.gdx.scenes.scene2d.utils Align]
           [com.badlogic.gdx Application Audio Files Game Gdx Graphics Input
            InputMultiplexer InputProcessor Net Preferences Screen]))


(defn get-color [e mouse-pos]
  (if (utils/intersects? e mouse-pos)
    (color :yellow)
    (color 0.6 1.0 1.0 1.0)))

(defn style-label [e font mouse-pos]
  (label! e :set-style (style :label font (get-color e mouse-pos)))
  e)

(defn center [e]
  (assoc e :x (- (/ 1280 2) (/ (.getWidth (:object e)) 2))))

(defscreen title-screen
  :on-show
  (fn [screen entities]
    
    (utils/setup-viewport screen 1280 960)
    (utils/load-settings!)
    (let [font (utils/get-font "ego/font.fnt")
          start-playing (assoc (label "Embark on thy adventure" (style :label font (color 0.6 1.0 1.0 1.0))) :x 0 :y 100 :height 32 :origin-x 0 :origin-y 0)
          start-playing (center start-playing) 
          quit (assoc (label "Quit thy adventure" (style :label font (color 0.6 1.0 1.0 1.0))) :x 0 :y 65 :height 32 :origin-x 0 :origin-y 0)
          quit (center quit) 
          music (utils/make-music "intro.ogg")
          ui-skin (skin "ui/ui.json")]
      (label! start-playing :set-alignment Align/center)
      (label! quit :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
                    :origin-x 0
                    :origin-y 0)
       :music-volume-slider (assoc (slider {:min 0 :max 100 :step 1} ui-skin :set-value (:music-volume @utils/settings))
                                   :x ( - (/  1280 2)
                                          150)
                                   :width 300
                                   :y 200)
       :sound-volume-slider (assoc (slider {:min 0 :max 100 :step 1 } ui-skin :set-value (:sound-volume @utils/settings))
                                   :width 300
                                   :x ( - (/  1280 2)
                                          150)
                                   :y 150)
       
       :font font
       :music music
       :volume 1.0
       :start-showing? false
       :start-playing start-playing
       :quit quit
       :tweens {:fade-in (tween/tween :fade-in screen [:fade :opacity] 1.0 0.0 1.0
                                      :finish #(do (utils/play-sound (:music %)) %)
                                      :ease tween/ease-in-quadratic)}}))

  :on-render
  (fn [screen [entities]]

    (clear!)
    (let [entities (utils/apply-tweens screen entities (:tweens entities))]
      (music! (:music entities) :set-volume (utils/current-music-volume (:volume entities)))
      (render! screen [(:overlay entities) (:start-playing entities) (:quit entities) (:music-volume-slider entities) (:sound-volume-slider entities) (:fade entities) ])
      entities))

  :show-screen (fn [entities]
                 entities)

  :on-mouse-moved (fn [screen [entities]]
                    (let [[x y] (utils/unproject screen)]
                      (style-label (:start-playing entities) (get-in entities [:font]) [x y])
                      (style-label (:quit entities) (get-in entities [:font]) [x y])
                      entities))
  :on-ui-changed
  (fn [screen [entities]]
    (swap! utils/settings
           assoc
           :music-volume (slider! (:music-volume-slider entities) :get-value)
           :sound-volume (slider! (:sound-volume-slider entities) :get-value))
    (utils/save-settings!)
    entities)

  :on-touch-up (fn [screen [entities]]
                 (when-not (get-in entities [:tweens :fade-out])
                   (let [[x y] (utils/unproject screen)]
                     (cond
                       (utils/intersects? (:start-playing entities) [x y])
                       (-> entities
                           (assoc-in [:tweens :fade-out]
                                     (tween/tween :fade-out screen [:fade :opacity] 0.0 1.0 1.0
                                                  :finish (fn [entities]
                                                            (utils/stop-sound (:music entities))
                                                            (set-screen! @(resolve 'advent.core/advent) scene/scene scene/hud dialogue/talking-screen dialogue/choice-screen inventory/inventory-screen safe/safe-screen)
                                                            entities)
                                                  :ease tween/ease-in-cubic))
                           (assoc-in [:tweens :fade-out-music]
                                     (tween/tween :fade-out-music screen [:volume] 1.0 0.0 1.0)))
                       (utils/intersects? (:quit entities) [x y])
                       (-> entities
                           (assoc-in [:tweens :fade-out]
                                     (tween/tween :fade-out screen [:fade :opacity] 0.0 1.0 1.0
                                                  :finish (fn [entities]
                                                            (System/exit 0)
                                                            entities)
                                                  :ease tween/ease-in-cubic)))

                       :else
                       nil))))

  :on-resize (fn [{:keys [viewport width height]} [entities]]
               (.update viewport width height)
               nil))