;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;;    http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.

(define-module (game main)
  #:use-module (chickadee)
  #:use-module (chickadee math rect)
  #:use-module (chickadee math vector)
  #:use-module (chickadee graphics color)
  #:use-module (chickadee graphics sprite)
  #:use-module (chickadee graphics texture)
  #:use-module (chickadee graphics text)
  #:use-module (chickadee graphics tile-map)
  #:use-module (system repl coop-server)
  #:export (launch-game))

(define sprite-position (vec2 156.0 176.0))
(define sprite-texture #f)
(define tile-atlas #f)
(define hero-atlas #f)
(define text-position (vec2 0.0 280.0))
(define tile-index 0)
(define tile-map #f)
(define repl #f)


(define (load)
  (set! sprite-texture (load-image "assets/images/chickadee.png"))
  (set! tile-atlas
    (split-texture
     (load-image "assets/images/simples_pimples.png"
                 #:transparent-color black)
     16 16))
  (set! hero-atlas
    (split-texture
     (load-image "assets/images/lr_penguin2.png")
     32 32))

  (set! tile-map (load-tile-map "assets/levels/level1.tmx"))
  (set! repl (spawn-coop-repl-server)))

(define (update dt)
  (poll-coop-repl-server repl)
  (set-vec2-y! sprite-position
               (floor-remainder (+ (vec2-y sprite-position) (* 50.0 dt)) 400.0))
  (set-vec2-x! text-position
               (floor-remainder (+ (vec2-x text-position) (* 25.0 dt)) 640.0))
  
  )

(define (draw-tile i)
  (let ((x (* 16 (remainder i 40)))
        (y (* 16 (quotient i 40))))
    (draw-sprite
     (texture-atlas-ref tile-atlas (+ i 3000 ))
     (vec2 x y)
     #:scale (vec2 1.0 1.0)))
  )

(define (draw-hero i)
  (let ((x (* 64 (remainder i 8)))
        (y (* 32 (quotient i 8)))
        (id (tile-id))
        )
    (draw-sprite
     (texture-atlas-ref hero-atlas i)
     (vec2 (+ x 16) y)
     #:scale (vec2 1.0 1.0))
    (draw-text (format #f "~2d" i) (vec2 x y) #:color white))
  )


(define (draw _alpha)
  (draw-sprite sprite-texture sprite-position)
  (draw-text "Hello, Chickadee!" text-position )
  (let ((hero-position (vec2+ text-position (vec2 -8.0 16.0)))
        (hero-index (+ 56 (remainder (inexact->exact (floor (vec2-x text-position))) 8))))
    (draw-sprite
     (texture-atlas-ref hero-atlas hero-index)
     hero-position))

  (draw-tile-map tile-map)
  
  ;;(do ((i 0 (+ i 1)))
  ;; ((>= i 1000))
  ;; (draw-tile i))
  (do ((i 0 (+ i 1)))
      ((>= i 64))
    (draw-hero i)))

(define (launch-game args)
  (run-game #:load (lambda () (load))
            #:update (lambda (dt) (update dt))
            #:draw (lambda (alpha) (draw alpha))))