(ns advent.utils
  (:refer-clojure :exclude [load])
  (:require [play-clj.core :refer :all]
            [play-clj.ui :refer :all]
            [play-clj.utils :refer :all]
            [play-clj.math :refer :all]
            [play-clj.g2d :refer :all]
            [clojure.java.io :as io]
            [clojure.edn :as edn])
  (: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 Actor Stage]
           [java.lang Object]))

(defn log-coords [screen entities]
  (let [{:keys [x y]} (input->screen screen {:x (:input-x screen) :y (:input-y screen)})]
    (println (:input-x screen) (:input-y screen) "->" x y)))

(def +all-cursors+ [:main :wool :mushrooms :carrot :right :down :left :up :flask :flask-with-contents :trophy :ladder :stick :cat-toy :balloon :frog-legs :teddy :portrait :recipe :glass-eye :motivational-tapes :used-earplugs :grass :slobber :flask-with-strength :medal :kiss :sword :hourglass :mandrake :ball-n-chain :key :rope :crowbar :note-1 :ash :sack-lunch :flies :spear :monocle :feather :spell-component :money :watch :broken-clock :slingshot :camera :walkie-talkies :alarm-clock :walkie-talkie :flask-water :flask-water-stuff :flask-water-stuff-2 :note-2 :magic-slingshot :active-main :shovel :broom])

(def settings (atom {:music-volume 50.0
                     :sound-volume 75.0}))

(defn current-music-volume [& [factor]]
  (* (Math/pow (/ (:music-volume @settings) 100.0) 2)
     0.25
     (or factor 1.0)))

(defn current-sound-volume [& [factor]]
  (* (Math/pow  (/ (:sound-volume @settings) 100.0) 2)
     0.5
     (or factor 1.0)))

(defn cursor [filename which]
  (let [scale 2
        base-cursor (pixmap filename)
        target-width (* 16 scale)
        target-height (* 16 scale)
        resized (Pixmap. target-width target-height (.getFormat base-cursor))
        index (.indexOf +all-cursors+ which)]
    #_(Pixmap/setFilter Pixmap$Filter/NearestNeighbour)
    (pixmap! resized :draw-pixmap base-cursor (* index 16) 0 16 16
             0 0 target-width target-height)
    resized ))

(defn save [entities]
  (spit "save.edn" (entities :state)))

(defn load []
  (assoc (edn/read-string (slurp "save.edn")) :active? true))

(defn load-settings! []
  (when (.exists (io/file "settings.edn"))
    (reset! settings (edn/read-string (slurp "settings.edn")))))

(defn save-settings! []
  (spit "settings.edn" @settings))

(defn get-font [filename]
  (let [font (bitmap-font filename) 
        tr (bitmap-font! font :get-region)
        tx (.getTexture tr)]
    (texture! tx :set-filter Texture$TextureFilter/Linear Texture$TextureFilter/Linear)
    font))

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

(defn scaler-fn-with-baseline [baseline minimum-size & [maximum-size]]
  (let [maximum-size (or maximum-size 1.0)]
    (fn [[_ y]]
      (if (< y baseline) maximum-size
          (let [percent-complete (- 1.0 (/ (- y baseline) (- +screen-height+ baseline)))
                range (+ (* percent-complete (- maximum-size minimum-size)) minimum-size)]
            range)))))

(defn get-scale-value [image x y]
  (let [base-y (Math/floor (- 240 y))
        other-y (Math/ceil (- 240 y))
        base-amount (- y (Math/floor y))
        other-amount (- 1.0 base-amount)
        base-v (-> image
                   (pixmap! :get-pixel x base-y)
                   color
                   (.r))
        other-v (-> image
                    (pixmap! :get-pixel x other-y)
                   color
                   (.r))]
    (+ (* base-v base-amount)
       (* other-v other-amount))))

(defn scaler-fn-from-image [image minimum-size maximum-size]
  (let [image (pixmap image)
        maximum-size (or maximum-size 1.0)]
    (fn [[x y]]
      (let [percent-complete (get-scale-value image x y)]
        (if (< y 0)
          maximum-size
          (+ (* percent-complete (- maximum-size minimum-size)) minimum-size))))))

(defn dist [x1 y1 x2 y2 & {:keys [y-sign x-sign]}]
  (let [y-sign (or y-sign 1.0)
        x-sign (or x-sign 1.0)
        dx (* (- x1 x2) x-sign)
        dy (* y-sign (- y1 y2))]
    (Math/sqrt (+ (* dx dx) (* dy dy)))))


(defn flip [anim]
  (animation (animation! anim :get-frame-duration)
             (for [src-frame (animation! anim :get-key-frames)
                   :let [frame (texture (texture! src-frame :get-texture))]]
               (do
                 (texture! frame :set-region src-frame)
                 (texture! frame :flip true false)
                 frame))))

(defn split-texture [file [w h] frames]
  (let [sheet (texture! (texture file) :split w h)]
    (for [i frames]
      (aget sheet 0 i))))

(defn make-anim [file [w h] speed frames]
  (animation speed (split-texture file [w h] frames)))


(defn make-bird [screen p]
  (let [bird-sheet (texture! (texture "outside-castle/bird.png") :split 1 2)
        bird-stand (animation 0.15 (for [i [0 1]]
                                    (aget bird-sheet 0 i)))]
    (assoc (animation->texture screen bird-stand)
      :x 0
      :y 0
      :baseline 21
      :anim bird-stand
      :anim-start 0
      :path (catmull-rom-spline (map #(apply vector-2* %)  p) true)
      :update-fn (fn [screen entities entity]
                   (let [speed 0.05
                         pos-f (- (* (:total-time screen) speed) (int (* (:total-time screen) speed)))
                         v (vector-2 0 0)
                         a (catmull-rom-spline! (:path entity) :value-at v pos-f)]
                     (assoc entity :x (vector-2! v :x) :y (vector-2! v :y)))))))

(defn update-path-location [speed screen entities entity]
  (let [pos-f (- (* (- (:total-time screen) (:path-start-time entity 0.0)) speed) (int (* (-  (:total-time screen) (:path-start-time entity 0.0)) speed)))
        v (vector-2 0 0)
        a (catmull-rom-spline! (:path entity) :value-at v pos-f)]
    (assoc entity :x (vector-2! v :x) :y (vector-2! v :y))))

(defn find-override [entities [x y]]
  (first (concat (filter #(and ((:mouse-in? %) entities x y)
                               
                               (:override %))
                         (get-in entities [:room :interactions]))
                 (filter #(and (:mouse-in? %)
                               ((:mouse-in? %) entities x y)
                               (not= "ego" (:id %))
                               (:script %))
                         (vals (get-in entities [:room :entities])))
                 (filter #(and ((:mouse-in? %) entities x y)
                               (:script %))
                         (get-in entities [:room :interactions])))))



(defn remove-interaction [entities id]
  (update-in entities [:room :interactions] (fn [i] (remove #(= id (:id %)) i))))


(defn play-sound [snd]
  (music! snd :play))

(defn stop-sound [snd]
  (music! snd :stop))

(defn make-music [r]
  (doto (music r) (music! :set-looping true)))



(defn apply-tweens [screen entities tweens]
  (reduce (fn [e f]
            (f e (:total-time screen)))
          entities
          (vals tweens)))

(defn intersects? [e [x y]]
  (and (:object e)
       (< (:x e) x (+ (:x e) (or (:width e) (.getWidth (:object e)))))
       (< (:y e) y (+ (:y e) (or (:height e) (.getHeight (:object e)))))))

(defn get-current-music [entities]
  (let [time (get-in entities [:state :time])
        musics (:musics entities)
        override-music (musics (get-in entities [:music-override :value]))
        current-music (musics (get-in entities [:room :music]))
        current-time-music (musics (get-in entities [:room :music time]))]
    (or override-music current-music current-time-music)))


(defn setup-viewport [screen width height]
  (let [cam (orthographic)
        viewport (FitViewport. width height cam)
        stage (Stage. viewport)]
    (update! screen :renderer stage :viewport viewport :camera cam)
    (.apply viewport)
    [cam viewport stage]))

(defn unproject 
  ([screen]
   (unproject screen [(:input-x screen) (:input-y screen)]) )
  ([screen [x y]]
   (let [pj (.unproject ^FitViewport (:viewport screen) (vector-2 x y))
         x (.x pj)
         y (.y pj)]
     [x y])))

(defn project 
  ([screen [x y]]
   (let [pj (.project ^FitViewport (:viewport screen) (vector-2 x y))
         x (.x pj)
         y (.y pj)]
     [x y])))

(defn contains-point? [x1 y1 width height x y]
  (and (< x1 x (+ x1 width))
       (< y1 y (+ y1 height))))

(defn update-override [screen entities]
  (let [last-pos (unproject screen (get-in entities [:cursor :last-pos]))] 
    (if (get-in entities [:state :active?])
      (if-let [mouse-override (find-override entities last-pos)]
        (assoc-in entities [:cursor :override] (or (:cursor mouse-override) (when (#{:main :active-main} (get-in entities [:cursor :last])) :active-main)))
        (assoc-in entities [:cursor :override] nil))
      entities)))

(def default-night-merge {:r 0.08 :g 0.1 :b 0.36 :multiply-amount 1.0 :hue-amount 1.0})
(def default-night-merge-sprite {:r 0.08 :g 0.1 :b 0.36 :multiply-amount 0.3 :hue-amount 0.4})

(defn clamp-volume [vol]
  (max vol 0.005))

(defn proximity-volume [entities [x y] & {:keys [scale]}]
  (-> (max 0.0
           (- 1.0 (/ (dist x y
                           (get-in entities [:room :entities :ego :x])
                           (get-in entities [:room :entities :ego :y])
                           :y-sign 2.0
                           :x-sign (/ 1.0 (get-in entities [:room :entities :ego :scale-x])))
                     175.0)))
      (* (or scale 1.0))
      (clamp-volume)))