(local beholder (require "libs/beholder"))
(local colors (require "src/colors.fnl"))
(local levels (require "levels.fnl"))
(local assets (require "src/assets.fnl"))

(lambda angle-to-direction [angle]
  "Convert angle (radians) to compass direction keyword"
  (local tau (* 2 math.pi))
  ; Normalize angle to 0-2π range
  (local normalized (% (+ angle tau) tau))
  ; Offset by 22.5° (π/8) so section boundaries align with directions
  (local offset (+ normalized (/ math.pi 8)))
  ; Find which 45° section (π/4) it falls into
  (local section (math.floor (/ offset (/ math.pi 4))))
  ; Map to compass directions
  (local directions [:e :se :s :sw :w :nw :n :ne])
  (. directions (+ (% section 8) 1)))

(local player { :x 50 :y 50 :w 25 :h 25 :speed 80 :battery 100 :rot 0 })

(fn player.update [self dt]
  (let [
      d-key (love.keyboard.isDown :d)
      a-key (love.keyboard.isDown :a)
      e-key (love.keyboard.isDown :e)
      q-key (love.keyboard.isDown :q)]
      (match {:d-key d-key :a-key a-key :e-key e-key :q-key q-key}
        {:d-key true  :a-key false :e-key false :q-key false} (set self.rot (+ self.rot (* dt 2)))
        {:d-key false :a-key true  :e-key false :q-key false} (set self.rot (- self.rot (* dt 2)))
        {:d-key false :a-key false :e-key true  :q-key false} (set self.rot (- self.rot (* dt 2)))
        {:d-key false :a-key false :e-key false :q-key true} (set self.rot (+ self.rot (* dt 2)))
      ))
      ; (when (and (> self.battery 0) (or d-key a-key e-key q-key))
      ;   (let [
      ;     dir-fn (if (or d-key a-key) #(+ $1 $2) #(- $1 $2))
      ;     new-x (dir-fn player.x (* player.speed dt (math.cos player.rot)))
      ;     new-y (dir-fn player.y (* player.speed dt (math.sin player.rot)))
      ;     col-filter-fn (lambda [item other]
      ;       (if (= other.behavior "block") :slide :cross))
      ;     (x y cols len)  (bump-world:move player new-x new-y col-filter-fn)]
      ;       (tset player :x x)
      ;       (tset player :y y))
      ;       (if (> player.battery 0)
      ;         (set player.battery (- player.battery (* dt 2))))))
  (beholder.trigger "PLAYER.POS" self.x self.y))

(fn player.load [self level-key]
  (set self.battery 100)
  (set self.x (. levels :levels level-key :spawns :player-1 :x))
  (set self.y (. levels :levels level-key :spawns :player-1 :y))
  ; (bump-world:add player player.x player.y player.w player.h))
  (set self.quads
    (let [
      (w h) (assets.player-sprite:getDimensions)]
      {
        :n (love.graphics.newQuad 0 0 25 25 w h)
        :s (love.graphics.newQuad 25 0 25 25 w h)
        :ne (love.graphics.newQuad 50 0 25 25 w h)
        :e (love.graphics.newQuad 75 0 25 25 w h)
        :se (love.graphics.newQuad 100 0 25 25 w h)
        :sw (love.graphics.newQuad 125 0 25 25 w h)
        :w (love.graphics.newQuad 150 0 25 25 w h)
        :nw (love.graphics.newQuad 175 0 25 25 w h)
      }))
  )

(fn player.draw50 [self]
  "draw player sprite and hitbox"
  (colors:reset-color)
  (love.graphics.draw
    assets.player-sprite
    (. self.quads (angle-to-direction player.rot))
    self.x self.y)
  ;; draw player hitbox and direction line
  ; (when state.debug
  ;   (colors:set-color :black)
  ;   (love.graphics.rectangle "line" self.x self.y self.w self.h)
  ;   (love.graphics.push)
  ;   (let [ox (+ self.x (/ 25 2)) oy (+ self.y (/ 25 2))]
  ;     (love.graphics.translate ox oy)
  ;     (love.graphics.rotate self.rot)
  ;     (love.graphics.line 0 0 35 0))
  ;   (love.graphics.pop))
  )


player