(comptime-define-symbol 'Unix)
(comptime-define-symbol 'No-Kitty-Main)

(define-constant DATA_DIR "data/")

;; Until GameLib is relocatable, we will build from it; All comptime paths in this file are relative
;; to Dependencies/gamelib!
;; (add-cakelisp-search-directory "Dependencies/gamelib/src")
;; (set-cakelisp-option cakelisp-src-dir "Dependencies/gamelib/Dependencies/cakelisp/src")
;; (add-cakelisp-search-directory "Dependencies/gamelib/Dependencies/cakelisp/runtime")
(add-cakelisp-search-directory "src" "Dependencies/cakelisp/runtime"
                               ;; kitty-gridlock src
                               "../../src")

(import "SDL.cake" ;; GameLib
        "Main.cake" ;; kitty-gridlock
        &comptime-only "Macros.cake" "BuildTools.cake") ;; cakelisp/runtime

(c-import "<stdio.h>" "<stdlib.h>"
          "SDL.h" "SDL_rwops.h")

(defun-local read-puzzles-text (&return bool)
  (var puzzles-file (* FILE) (fopen (in-data-dir "puzzles.txt") "r"))
  (unless puzzles-file
    (SDL_Log "Failed to load puzzles. Did the pre-build step generate-puzzles-list fail? You can
 also run Decompression.cake directly (see Build.sh)\n")
    (return true))

  ;; 48 = max length of a single line in puzzles .txt
  (var line-buffer ([] 48 char) (array 0))
  (unless (fgets line-buffer (array-size line-buffer) puzzles-file)
    (SDL_Log "Puzzle file malformed\n") (return false))
  (var num-puzzles int (atoi line-buffer))
  (SDL_Log "Reading %d puzzles\n" num-puzzles)
  (when g-puzzle-list (free (type-cast g-puzzle-list (* void))))
  (set g-num-puzzles num-puzzles)
  (set g-puzzle-list (type-cast (calloc g-num-puzzles (sizeof (type puzzle-data))) (* puzzle-data)))

  ;; Read puzzles line by line
  (var current-puzzle (* puzzle-data) g-puzzle-list)
  (while (and (fgets line-buffer (array-size line-buffer) puzzles-file)
              (< (- current-puzzle g-puzzle-list) g-num-puzzles))
    (var num-moves int 0)
    (var num-states int 0)
    (var pieces-read bool false)
    (var buffer ([] 37 char) (array 0))
    (var write-char (* char) buffer)
    (var current-char (* (const char)) line-buffer)
    (while (deref current-char)
      (cond
        ;; Space field delimiter
        ((= (deref current-char) (space-hack))
         (cond
           ((not num-moves)
            (set num-moves (atoi buffer)))
           (true ;; Copy pieces
            ;; TODO Magic number
            (memcpy (path current-puzzle > board) buffer 36)
            (set pieces-read true)))

         ;; Reset buffer after space
         (memset buffer 0 (sizeof buffer))
         (set write-char buffer))
        ((= (deref current-char) '\n')
         (break))
        (true
         (set (deref write-char) (deref current-char))
         (incr write-char)))
      (incr current-char))
    (set (path current-puzzle > num-moves) num-moves)
    (set num-states (atoi buffer))
    (set (path current-puzzle > num-states) num-states)
    (incr current-puzzle))

  (fclose puzzles-file)
  (return (> g-num-puzzles 0)))

(var g-puzzle-binary-version Uint32 1)

(defun-local write-puzzles-binary (filename (* (const char)) &return bool)
  (unless g-num-puzzles
    (SDL_Log "No puzzles to write\n")
    (return false))
  (var puzzles-file (* SDL_RWops) (SDL_RWFromFile filename "w"))
  (unless puzzles-file
    (SDL_Log "Failed to open puzzles output file\n")
    (return false))

  (SDL_WriteLE32 puzzles-file g-puzzle-binary-version)
  (SDL_WriteLE32 puzzles-file g-num-puzzles)

  (unless (SDL_RWwrite puzzles-file g-puzzle-list (sizeof (type puzzle-data)) g-num-puzzles)
    (SDL_Log "Failed to write puzzles\n")
    (return false))

  (SDL_RWclose puzzles-file)
  (return true))

(defun read-puzzles-binary (filename (* (const char)) &return bool)
  (when g-puzzle-list
    (free (type-cast g-puzzle-list (* void)))
    (set g-puzzle-list null))
  (var puzzles-file (* SDL_RWops) (SDL_RWFromFile filename "r"))
  (unless puzzles-file
    (SDL_Log "Failed to open puzzles output file\n")
    (return false))

  (var version Uint32 (SDL_ReadLE32 puzzles-file))
  (unless (= g-puzzle-binary-version version)
    (SDL_Log "Version mismatch: expected %d, got %d\n" g-puzzle-binary-version version)
    (return false))
  (set g-num-puzzles (SDL_ReadLE32 puzzles-file))
  (unless g-num-puzzles
    (SDL_Log "No puzzles to read\n")
    (return false))

  (set g-puzzle-list (type-cast (calloc g-num-puzzles (sizeof (type puzzle-data))) (* puzzle-data)))

  (unless (SDL_RWread puzzles-file g-puzzle-list (sizeof (type puzzle-data)) g-num-puzzles)
    (SDL_Log "Failed to read puzzles\n")
    (return false))

  ;; Not even sure if this will work, but I don't care too much about this
  (var test-num-moves int (field (at 0 g-puzzle-list) num-moves))
  (when (or (< test-num-moves 0) (> test-num-moves 60))
    (SDL_Log "Possible endianness mismatch. Puzzles will need to be loaded with converted endianness\n")
    (return false))

  (SDL_RWclose puzzles-file)
  (return true))

(comptime-cond
 ('Kitty-Main)
 (true
  (defun main (&return int)
    (unless (read-puzzles-text) (return 1))
    (unless (write-puzzles-binary (in-data-dir "puzzles.bin")) (return 1))
    (unless (read-puzzles-binary (in-data-dir "puzzles.bin")) (return 1))
    (return 0))))

;;
;; Building
;;

(module-use-sdl-build-options)

(add-library-runtime-search-directory "Dependencies/gamelib/Dependencies/SDL/buildSDLBuild/lib")

;; Note that this executable still pulls .so files from Dependencies
(comptime-cond
 ('Kitty-Main)
 (true
  (set-cakelisp-option executable-output "../../generate-puzzles")
  ;; Need a label so that our special version of Main.cake isn't used
  (add-build-config-label "GeneratePuzzles")))