;;-*-Lisp-*-
(in-package goal)
(bundles "ENGINE.CGO" "GAME.CGO")
(require "engine/gfx/hw/display.gc")
(require "engine/gfx/font.gc")

;; This file contains the UI and rendering for the debug menu, but not the actual menu layout and callbacks.

;; The "context" is the entire multi-level debug menu.  There's a separate context for the main debug and the "popup" menu.
;; A "menu" is a listing of "items".
;; An item is a line in the menu. It can be a flag, function, or variable.

(declare-type debug-menu basic)

(declare-type debug-menu-item basic)

;; DECOMP BEGINS

;; this file is debug only
(declare-file (debug))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; context, menu, and item
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; There is one for the normal menu, and one for the "popup" one that appears when you press L3/R3
;; This stores a stack of open menus in sel-menu.
;; The 0th index is the selection in the root-menu.
(deftype debug-menu-context (basic)
  ((is-active   symbol) ;; should we draw?
   (sel-length  int32) ;; depth of open menus
   (sel-menu    debug-menu 8) ;; at each level, what is selected?
   (root-menu   debug-menu) ;; the top level menu
   (joypad-func (function basic none)) ;; if not, #f, callback for getting joystick inputs
   (joypad-item basic) ;; object passed as arg to joypad-func
   (font        font-context) ;; font rendering settings
   (is-hidden   symbol) ;; set to #t to temporarily hide.
   )
  (:methods
   (new (symbol type) _type_)))

(defmethod new debug-menu-context ((allocation symbol) (type-to-make type))
  "Create a new debug-menu-context"
  (let ((context (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> context is-active) #f)
    (set! (-> context is-hidden) #f)
    (set! (-> context sel-length) 0)
    (set! (-> context root-menu) #f)
    (set! (-> context joypad-func) #f)
    (set! (-> context joypad-item) #f)
    ;; og:preserve-this added pc-hack flag
    (set! (-> context font)
          (new 'debug 'font-context *font-default-matrix* 0 0 0.0 (font-color default) (font-flags shadow kerning pc-hack)))
    context))

;; Parent type for entrees in the debug-menu tree.
;; This is used for both entries and menus.

;; Items will be periodically "refreshed" to update their color/status.
;; Updating every item on every frame would be slow, so you can set a nonzero value in refresh-delay
;; to only run the refresh every refresh-delay frames.
(deftype debug-menu-node (basic)
  ((name          string)
   (parent        debug-menu)
   (refresh-delay int32)
   (refresh-ctr   int32)))

(defmethod print ((this debug-menu-node))
  (format #t "#<~A ~A @ #x~X>" (-> this type) (-> this name) this)
  this)

;; Parent type for a menu (list of things)
(deftype debug-menu (debug-menu-node)
  ((context       debug-menu-context)
   (selected-item debug-menu-item)
   (pix-width     int32)
   (pix-height    int32)
   (items         pair))
  (:methods
   (new (symbol type debug-menu-context string) _type_)))

(defmethod new debug-menu ((allocation symbol) (type-to-make type) (context debug-menu-context) (name string))
  "Create a new debug-menu"
  (let ((menu (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> menu context) context)
    (set! (-> menu name) name)
    (set! (-> menu parent) #f)
    (set! (-> menu selected-item) #f)
    (set! (-> menu items) '())
    menu))

;; Parent type for an item (an individual, selectable entry within a menu)
(deftype debug-menu-item (debug-menu-node)
  ((id int32)))

(deftype debug-menu-item-submenu (debug-menu-item)
  ((submenu debug-menu))
  (:methods
   (new (symbol type string debug-menu) _type_)))

(defmethod new debug-menu-item-submenu ((allocation symbol) (type-to-make type) (name string) (menu debug-menu))
  "Create an item that opens the given menu."
  (let ((item (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> item name) name)
    (set! (-> item parent) #f)
    (set! (-> item refresh-delay) 0)
    (set! (-> item refresh-ctr) (-> item refresh-delay))
    (set! (-> item submenu) menu)
    ;; in this case, the submenu's parent is set to the item, not a menu.
    ;; it's possible that the type of parent here is just debug-menu-node, but this value is never used.
    (set! (-> item submenu parent) (the-as debug-menu item))
    item))

;;;;;;;;;;;;;;;;;;;;;;;;
;; Items
;;;;;;;;;;;;;;;;;;;;;;;;
(defenum debug-menu-msg
  :type int32
  (activate 1)
  (deactivate 2)
  (update 3)
  (press 4))

;; An item that calls a function when you select it.
(deftype debug-menu-item-function (debug-menu-item)
  ((activate-func (function object object))
   (hilite-timer  int8) ;; how much longer to stay highlighted for.
   )
  (:methods
   (new (symbol type string object (function object object)) _type_)))

(defmethod new debug-menu-item-function ((allocation symbol) (type-to-make type) (name string) (id object) (activate-func (function object object)))
  "Create an item for a function."
  (let ((item (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> item name) name)
    (set! (-> item parent) #f)
    (set! (-> item refresh-delay) 0)
    (set! (-> item refresh-ctr) (-> item refresh-delay))
    (set! (-> item id) (the-as int id))
    (set! (-> item activate-func) activate-func)
    (set! (-> item hilite-timer) 0)
    item))

;; An item with on/off state.
(deftype debug-menu-item-flag (debug-menu-item)
  ((activate-func (function object debug-menu-msg object))
   (is-on         object))
  (:methods
   (new (symbol type string object (function object debug-menu-msg object)) _type_)))

(defmethod new debug-menu-item-flag ((allocation symbol) (type-to-make type) (name string) (id object) (activate-func (function object debug-menu-msg object)))
  "Create a periodically refreshed flag item whose callback reads or toggles the value."
  (let ((item (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> item name) name)
    (set! (-> item parent) #f)
    (set! (-> item refresh-delay) 23)
    (set! (-> item refresh-ctr) (-> item refresh-delay))
    (set! (-> item id) (the-as int id))
    (set! (-> item activate-func) activate-func)
    (set! (-> item is-on) (the-as object #f))
    item))

(deftype debug-menu-item-var (debug-menu-item)
  ((display-str      string)
   (grabbed-joypad-p symbol)
   (float-p          symbol)
   (range-p          symbol)
   (show-len         int32)
   (inc-delay        int32)
   (inc-delay-ctr    int32)
   (step-delay-ctr   int32)
   (inc-dir          int32)
   (fval             float)
   (fundo-val        float)
   (frange-min       float)
   (frange-max       float)
   (fstart-inc       float)
   (fstep            float)
   (fprecision       int32)
   (factivate-func   (function int debug-menu-msg float float float))
   (ival             int32 :overlay-at fval)
   (iundo-val        int32 :overlay-at fundo-val)
   (irange-min       int32 :overlay-at frange-min)
   (irange-max       int32 :overlay-at frange-max)
   (istart-inc       int32 :overlay-at fstart-inc)
   (istep            int32 :overlay-at fstep)
   (ihex-p           symbol)
   (iactivate-func   (function int debug-menu-msg int int int) :overlay-at factivate-func)
   (ifloat-p         symbol))
  (:methods
   (new (symbol type string int int) _type_)))

(defenum debug-menu-dest
  :type int32
  (root 1)
  (open-menus 2)
  (current-selection 3)
  (activation 0))

(define-extern debug-menu-context-send-msg
  (function debug-menu-context debug-menu-msg debug-menu-dest debug-menu-context))

(define-extern debug-menu-item-send-msg (function debug-menu-item debug-menu-msg debug-menu-item))

;;;;;;;;;;;;;;;;;;;;;;;;
;; Variable Menu Setup
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-item-var-update-display-str ((item debug-menu-item-var))
  "Update display-str to the current value of the variable"
  (cond
    ((-> item float-p) (format (clear (-> item display-str)) "~f" (-> item fval)))
    ((-> item ihex-p) (format (clear (-> item display-str)) "x~X" (-> item fval)))
    ((-> item ifloat-p)
     (cond
       ((and (< (the-as int (-> item fval)) 0) (< -100 (the-as int (-> item fval))))
        (let ((abs-value (abs (the-as int (-> item fval))))) (format (clear (-> item display-str)) "-0.~1d" (/ (mod abs-value 100) 10))))
       (else
        (let ((abs-value (abs (the-as int (-> item fval)))))
          (format (clear (-> item display-str)) "~2d.~1d" (/ (the-as int (-> item fval)) 100) (/ (mod abs-value 100) 10))))))
    (else (format (clear (-> item display-str)) "~D" (-> item fval))))
  item)

(defun debug-menu-item-var-make-int ((item debug-menu-item-var)
        (callback (function int debug-menu-msg int int int))
        (inc int)
        (has-range symbol)
        (range-min int)
        (range-max int)
        (hex symbol))
  "Set up the given item as an integer variable"
  (set! (-> item float-p) #f)
  (set! (-> item range-p) has-range)
  (set! (-> item irange-min) range-min)
  (set! (-> item irange-max) range-max)
  (set! (-> item istart-inc) inc)
  (set! (-> item istep) inc)
  (set! (-> item ihex-p) hex)
  (set! (-> item iactivate-func) callback)
  (cond
    (has-range (set! (-> item fval) (the-as float range-min)))
    (else (set! (-> item fval) (the-as float 0)) 0))
  ;; initialize with the callback.
  (if callback (set! (-> item ival) (callback (-> item id) (debug-menu-msg update) (-> item ival) (-> item ival))))
  (debug-menu-item-var-update-display-str item)
  item)

(defun debug-menu-item-var-make-float ((item debug-menu-item-var)
        (callback (function int debug-menu-msg float float float))
        (inc float)
        (has-range symbol)
        (range-min float)
        (range-max float)
        (precision int))
  "Set up the given item as a float variable"
  (set! (-> item float-p) #t)
  (set! (-> item range-p) has-range)
  (set! (-> item frange-min) range-min)
  (set! (-> item frange-max) range-max)
  (set! (-> item fstart-inc) inc)
  (set! (-> item fstep) inc)
  (set! (-> item fprecision) precision)
  (set! (-> item factivate-func) callback)
  (if has-range (set! (-> item fval) range-min) (set! (-> item fval) 0.0))
  ;; The callback result is converted from int to float here even though the callback's
  ;; declared result is float.
  (if callback
    (set! (-> item fval) (the float (callback (-> item id) (debug-menu-msg update) (-> item fval) (-> item fval)))))
  (debug-menu-item-var-update-display-str item)
  item)

(defmethod new debug-menu-item-var ((allocation symbol) (type-to-make type) (name string) (id int) (max-width int))
  "Create a new item for modifying a variable. Will default to int."
  (let ((item (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (let ((max-chars (/ max-width 8)))
      (set! (-> item name) name)
      (set! (-> item parent) #f)
      (set! (-> item refresh-delay) (#if PC_PORT 1 31))
      (set! (-> item refresh-ctr) (-> item refresh-delay))
      (set! (-> item id) id)
      (set! max-chars (if (< 3 max-chars) max-chars 3))
      (set! (-> item show-len) max-chars))
    (set! (-> item grabbed-joypad-p) #f)
    (set! (-> item ifloat-p) #f)
    (set! (-> item display-str) (new 'debug 'string 64 (the-as string #f)))
    (debug-menu-item-var-make-int item (the-as (function int debug-menu-msg int int int) #f) 1 #t 0 0 #f)
    item))

;;;;;;;;;;;;;;;;;;;;;;;;
;; joypad grabbing
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-context-grab-joypad ((ctxt debug-menu-context) (callback-arg basic) (callback-func (function basic none)))
  "Set up this context to be controlled from a joypad. If we are already, return #f, otherwise return #t"
  (cond
    ((-> ctxt joypad-func) #f)
    (else (set! (-> ctxt joypad-func) callback-func) (set! (-> ctxt joypad-item) callback-arg) #t)))

(defun debug-menu-context-release-joypad ((ctxt debug-menu-context))
  "Remove joypad control from this context"
  (set! (-> ctxt joypad-func) #f)
  (set! (-> ctxt joypad-item) #f)
  #f)

;;;;;;;;;;;;;;;;;;;;;;;;
;; menu building
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-item-get-max-width ((item debug-menu-item) (menu debug-menu))
  "Determine the width, in screen units"
  0
  (cond
    ((= (-> item type) debug-menu-item-submenu) (+ (the int (get-string-length (-> item name) (-> menu context font))) 16))
    ((= (-> item type) debug-menu-item-var)
     (the int (get-string-length (-> (the-as debug-menu-item-var item) display-str) (-> menu context font))))
    (else (+ (the int (get-string-length (-> item name) (-> menu context font))) 6))))

(defun debug-menu-context-default-selection ((ctxt debug-menu-context) (keep-current symbol))
  "Set the menu to a default selection.
  If keep-current-selection is set to #t, this will only change the selection if nothing is selected yet."
  ;; sel-length = 0 means nothing is selected
  (when (or (zero? (-> ctxt sel-length)) (not keep-current))
    (let ((menu (-> ctxt root-menu)))
      ;; check that we have a menu with items
      (when (and menu (not (null? (-> menu items))))
        (let ((currently-active (-> ctxt is-active)))
          ;; if we're active, deactivate it
          (if currently-active (debug-menu-context-send-msg ctxt (debug-menu-msg deactivate) (debug-menu-dest activation)))
          ;; reset the selection stack down to a single thing, just the root menu.
          (set! (-> ctxt sel-length) 1)
          (set! (-> ctxt sel-menu 0) menu)
          ;; select the first thing within the root menu
          (set! (-> menu selected-item) (the-as debug-menu-item (car (-> menu items))))
          ;; if we were active, activate again.
          (if currently-active (debug-menu-context-send-msg ctxt (debug-menu-msg activate) (debug-menu-dest activation)))))))
  ctxt)

(defun debug-menu-rebuild ((menu debug-menu))
  "Set the width and height of the background. If needed, completely reset the menu."
  (let ((max-width 0)
        (entry-count 0))
    ;; loop over entries
    (let* ((iter (-> menu items))
           (current-item (car iter)))
      (while (not (null? iter))
        (+! entry-count 1)
        ;; link to parent
        (set! (-> (the-as debug-menu-item current-item) parent) menu)
        (set! max-width (max max-width (debug-menu-item-get-max-width (the-as debug-menu-item current-item) menu)))
        (set! iter (cdr iter))
        (set! current-item (car iter))))
    (set! (-> menu pix-width) (+ max-width 18))
    (set! (-> menu pix-height) (+ (* entry-count 8) 6)))
  (let ((a0-2 (-> menu context)))
    ;; will only reset to default if nothing is selected.
    (debug-menu-context-default-selection a0-2 #t))
  menu)

(defun debug-menu-context-set-root-menu ((context debug-menu-context) (menu debug-menu))
  "Set the root menu and reset everything."
  ;; deactivate, if we are active
  (let ((active (-> context is-active)))
    (if active (debug-menu-context-send-msg context (debug-menu-msg deactivate) (debug-menu-dest activation)))
    ;; the actual set
    (set! (-> context root-menu) menu)
    ;; reset
    (debug-menu-context-default-selection context #f)
    ;; activate if needed
    (if active (debug-menu-context-send-msg context (debug-menu-msg activate) (debug-menu-dest activation))))
  context)

(defun debug-menu-append-item ((menu debug-menu) (item debug-menu-node))
  "Add an entry to the debug menu."
  (let* ((context (-> menu context))
         (was-active (-> context is-active)))
    (if was-active (debug-menu-context-send-msg context (debug-menu-msg deactivate) (debug-menu-dest activation)))
    (set! (-> item parent) menu)
    ;; og:preserve-this was normal cons
    (set! (-> menu items) (the-as pair (append! (-> menu items) (dcons item '()))))
    (debug-menu-rebuild menu)
    (if was-active (debug-menu-context-send-msg context (debug-menu-msg activate) (debug-menu-dest activation))))
  item)

(defun debug-menu-remove-all-items ((menu debug-menu))
  "Remove all the items from a menu"
  (let* ((context (-> menu context))
         (was-active (-> context is-active)))
    (if was-active (debug-menu-context-send-msg context (debug-menu-msg deactivate) (debug-menu-dest activation)))
    (set! (-> menu items) '())
    (set! (-> menu selected-item) #f)
    (debug-menu-rebuild menu)
    (if was-active (debug-menu-context-send-msg context (debug-menu-msg activate) (debug-menu-dest activation))))
  menu)

(defun debug-menu-func-decode ((value object))
  "Get a function. The input can be a symbol or a function. Otherwise it will give you the nothing function."
  (let ((value-type (rtype-of value)))
    (the-as function
            (cond
              ((or (= value-type symbol) (= value-type type)) (the-as symbol (-> (the-as symbol value) value)))
              ((= value-type function) (the-as symbol value))
              (else (the-as symbol nothing))))))

(defun-recursive debug-menu-make-from-template debug-menu-node ((context debug-menu-context) (template pair))
  "Recursively build menus and items from a static template. Menu entries contain child templates;
   flag and function entries decode callbacks; variable entries select integer, fixed-point,
   hexadecimal, floating-point, or scaled floating-point setup."
  (local-vars (result basic))
  (when (or (not template) (null? template))
    (set! result #f)
    (goto cfg-41))
  (let ((kind (car template))
        (name (the-as string (car (cdr template)))))
    (cond
      ((= kind 'menu)
       (let ((submenu (new 'debug 'debug-menu context name)))
         (set! result (new 'debug 'debug-menu-item-submenu name submenu))
         (let* ((children (cdr (cdr template)))
                (child-template (car children)))
           (while (not (null? children))
             (let ((child (debug-menu-make-from-template context (the-as pair child-template)))) (if child (debug-menu-append-item submenu child)))
             (set! children (cdr children))
             (set! child-template (car children))))))
      ((= kind 'main-menu)
       (set! result (new 'debug 'debug-menu context name))
       (let* ((children (cdr (cdr template)))
              (child-template (car children)))
         (while (not (null? children))
           (let ((child (debug-menu-make-from-template context (the-as pair child-template))))
             (if child (debug-menu-append-item (the-as debug-menu result) child)))
           (set! children (cdr children))
           (set! child-template (car children))))
       (debug-menu-context-set-root-menu context (the-as debug-menu result)))
      (else
       (set! result
             (cond
               ((= kind 'flag)
                (new 'debug
                     'debug-menu-item-flag
                     name
                     (car (cdr (cdr template)))
                     (the-as (function object debug-menu-msg object) (debug-menu-func-decode (car (cdr (cdr (cdr template))))))))
               ((or (= kind 0) (= kind 'function))
                (new 'debug
                     'debug-menu-item-function
                     name
                     (car (cdr (cdr template)))
                     (the-as (function object object) (debug-menu-func-decode (car (cdr (cdr (cdr template))))))))
               ((= kind 'var)
                (new 'debug 'debug-menu-item-var name (the-as int (car (cdr (cdr template)))) (the-as int (car (cdr (cdr (cdr template)))))))
               ((or (= kind 'int-var) (= kind 'int-var-gat1) (= kind 'hex-var))
                (set! result (new 'debug 'debug-menu-item-var name (the-as int (car (cdr (cdr template)))) (the-as int (ref template 4))))
                (debug-menu-item-var-make-int (the-as debug-menu-item-var result)
                                              (the-as (function int debug-menu-msg int int int) (debug-menu-func-decode (car (cdr (cdr (cdr template))))))
                                              (/ (the-as int (ref template 5)) 8)
                                              (the-as symbol (ref template 6))
                                              (/ (the-as int (ref template 7)) 8)
                                              (/ (the-as int (ref template 8)) 8)
                                              (= kind 'hex-var))
                ;; PC: GAT1 integer values are stored in hundredths but displayed with one
                ;; decimal digit; ordinary integer and hexadecimal entries stay integral.
                (set! (-> (the-as debug-menu-item-var result) ifloat-p) (= kind 'int-var-gat1)) ;;#t)
                result)
               ((= kind 'float-var)
                (set! result (new 'debug 'debug-menu-item-var name (the-as int (car (cdr (cdr template)))) (the-as int (ref template 4))))
                (debug-menu-item-var-make-float (the-as debug-menu-item-var result)
                                                (the-as (function int debug-menu-msg float float float) (debug-menu-func-decode (car (cdr (cdr (cdr template))))))
                                                (the float (/ (the-as int (ref template 5)) 8))
                                                (the-as symbol (ref template 6))
                                                (the float (/ (the-as int (ref template 7)) 8))
                                                (the float (/ (the-as int (ref template 8)) 8))
                                                (/ (the-as int (ref template 9)) 8))
                result)
               ((= kind 'float-fixed-var)
                (set! result (new 'debug 'debug-menu-item-var name (the-as int (car (cdr (cdr template)))) (the-as int (ref template 4))))
                (debug-menu-item-var-make-float (the-as debug-menu-item-var result)
                                                (the-as (function int debug-menu-msg float float float) (debug-menu-func-decode (car (cdr (cdr (cdr template))))))
                                                (* 0.001 (the float (/ (the-as int (ref template 5)) 8)))
                                                (the-as symbol (ref template 6))
                                                (* 0.001 (the float (/ (the-as int (ref template 7)) 8)))
                                                (* 0.001 (the float (/ (the-as int (ref template 8)) 8)))
                                                (/ (the-as int (ref template 9)) 8))
                result)
               (else #f))))))
  (label cfg-41)
  (the-as debug-menu-node result))

(defun debug-menu-find-from-template ((context debug-menu-context) (path pair))
  "Find a debug-menu that was added by a template. This could be used to modify it after,
   for example to add in options that might not be known at compile-time."
  (let ((node (the-as object (-> context root-menu))))
    (while (begin
             (label cfg-17)
             (and node (type-type? (-> (the-as debug-menu-node node) type) debug-menu) (not (null? path))))
      (let ((items (-> (the-as debug-menu node) items))
            (path-name (car path)))
        (set! path (cdr path))
        (let ((item (car items)))
          (while (not (null? items))
            (when (string= (the-as string path-name) (-> (the-as debug-menu-item item) name))
              (if (type-type? (rtype-of item) debug-menu-item-submenu)
                (set! node (-> (the-as debug-menu-item-submenu item) submenu))
                (set! node item))
              (goto cfg-17))
            (set! items (cdr items))
            (set! item (car items)))))
      (set! node #f)
      (goto cfg-24))
    (label cfg-24)
    (the-as debug-menu node)))

;;;;;;;;;;;;;;;;;;;;;;;;
;; rendering
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-item-submenu-render ((item debug-menu-item-submenu) (x int) (y int) (submenus int) (selected symbol))
  "Draw the text for a submenu. Like Render...
  The submenus parameter is the number of _open_ menus below the one containing this item"
  (let ((font (-> item parent context font)))
    (set-origin! font x y)
    (set! (-> font color)
          (cond
            ((zero? submenus) (font-color menu)) ;; in the active menu, white
            (selected (font-color menu-selected-parent)) ;; a parent, but selected
            (else (font-color menu-parent)) ;; a parent, but not selected
            ))
    (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
      (draw-string-adv (-> item name) dma-buf font)
      (draw-string-adv "..." dma-buf font)))
  item)

(defun debug-menu-item-function-render ((item debug-menu-item-function) (x int) (y int) (submenus int) (selected symbol))
  "Draw the text for a function entry. Also updates the timer for the highlight."
  (let ((font (-> item parent context font)))
    (set-origin! font x y)
    (set! (-> font color)
          (cond
            ((> (-> item hilite-timer) 0)
             ;; if the hilite is >0, we ran the function successfully, so we hilite in blue for a bit
             (1-! (-> item hilite-timer))
             (font-color menu-selected))
            ((< (-> item hilite-timer) 0)
             ;; if we're negative, it failed, so hilite in red
             (1+! (-> item hilite-timer))
             (font-color menu-func-bad))
            ((nonzero? submenus)
             ;; in a parent menu
             (font-color menu-parent))
            (else
             ;; option in the active menu.
             (font-color menu))))
    (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
      (draw-string (-> item name) dma-buf font)))
  item)

(defun debug-menu-item-flag-render ((item debug-menu-item-flag) (x int) (y int) (submenus int) (selected symbol))
  "Draw the text for a flag."
  (let ((font (-> item parent context font)))
    (set-origin! font x y)
    (set! (-> font color)
          (cond
            ((= (-> item is-on) 'invalid)
             (font-color menu-invalid) ;; can't use this one.
             )
            ((-> item is-on)
             (if (zero? submenus)
               (font-color menu-flag-on) ;; on, and in active menu
               (font-color menu-flag-on-parent) ;; on, and in parent menu
               ))
            ((zero? submenus)
             (font-color menu-flag-off) ;; off, and in active menu
             )
            (else
             (font-color menu-flag-off-parent) ;; off, and in parent menu
             )))
    (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
      (draw-string (-> item name) dma-buf font)))
  item)

(defun debug-menu-item-var-render ((item debug-menu-item-var) (x int) (y int) (submenus int) (selected symbol))
  "Draw the text for a variable"
  (let ((font (-> item parent context font)))
    (set-origin! font x y)
    (set! (-> font color)
          (cond
            ((zero? submenus)
             (if (-> item grabbed-joypad-p)
               (font-color menu-selected) ;; active menu, using joypad
               (font-color menu) ;; active menu, but not grabbed
               ))
            (selected
             (font-color menu-selected-parent) ;; selected entry in a parent menu
             )
            (else (font-color menu-parent))))
    (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
      (draw-string-adv (-> item name) dma-buf font)
      (draw-string-adv ":" dma-buf font)
      (cond
        ((>= (-> item show-len) (length (-> item display-str)))
         ;; enough room to just draw the whole thing
         (draw-string (-> item display-str) dma-buf font))
        (else
         ;; not enough room. normally just draw ...
         (draw-string "..." dma-buf font)
         ;; display the whole thing if: we're selected and there are no submenus.
         (set! selected (and (zero? submenus) selected))
         (when selected
           (set-origin! font 20 204)
           (draw-string-adv (-> item name) dma-buf font)
           (draw-string-adv ":" dma-buf font)
           (draw-string (-> item display-str) dma-buf font))))))
  item)

(defun debug-menu-item-render ((item debug-menu-item) (x int) (y int) (submenus int) (selected symbol))
  "Draw an item. This feels like it should have been a method..."
  ;; do a refresh, if it's time.
  (when (> (-> item refresh-delay) 0)
    (+! (-> item refresh-ctr) -1)
    (when (<= (-> item refresh-ctr) 0)
      (set! (-> item refresh-ctr) (-> item refresh-delay))
      (debug-menu-item-send-msg item (debug-menu-msg update))))
  ;; call the appropriate render function.
  (cond
    ((= (-> item type) debug-menu-item-submenu)
     (debug-menu-item-submenu-render (the-as debug-menu-item-submenu item) x y submenus selected))
    ((= (-> item type) debug-menu-item-function)
     (debug-menu-item-function-render (the-as debug-menu-item-function item) x y submenus selected))
    ((= (-> item type) debug-menu-item-flag)
     (debug-menu-item-flag-render (the-as debug-menu-item-flag item) x y submenus selected))
    ((= (-> item type) debug-menu-item-var)
     (debug-menu-item-var-render (the-as debug-menu-item-var item) x y submenus selected))
    (else (format 0 "ERROR: Found unknown item type!~%")))
  item)

(defun debug-menu-render ((menu debug-menu) (x-pos int) (y-pos int) (selected debug-menu-node) (submenus int))
  "Render a menu."
  ;; draw the background
  (let ((selection-index 0))
    (let* ((items (-> menu items))
           (item (car items)))
      (while (not (null? items))
        (if (= item selected) (goto cfg-7))
        (+! selection-index 1)
        (set! items (cdr items))
        (set! item (car items))))
    (label cfg-7)
    (if (< 16 selection-index) (set! y-pos (- y-pos (* (+ selection-index -16) 8)))))
  (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
    ;; og:preserve-this fixed for widescreen
    (draw-sprite2d-xy dma-buf
                      (correct-x-int x-pos)
                      y-pos
                      (correct-x-int (-> menu pix-width))
                      (-> menu pix-height)
                      (static-rgba #x00 #x00 #x00 #x40)))
  ;; draw each item
  (let* ((item-x (+ x-pos 3))
         (item-y (+ y-pos 3))
         (items (-> menu items))
         (item (car items)))
    (while (not (null? items))
      ;; draw > on the selected object
      (when (= item selected)
        ;; dim it if it's in a parent menu.
        (set! (-> menu context font color) (if (nonzero? submenus) (font-color menu-parent) (font-color menu)))
        (set-origin! (-> menu context font) item-x item-y)
        (with-dma-buffer-add-bucket ((dma-buf (-> (current-frame) debug-buf)) (bucket-id debug-no-zbuf))
          (draw-string ">" dma-buf (-> menu context font))))
      ;; actually draw the item.
      ;; og:preserve-this do not render if text is out of bounds...
      (when (and (< -20 item-y) (> 256 item-y))
        (debug-menu-item-render (the-as debug-menu-item item) (+ item-x 12) item-y submenus (= item selected)))
      (+! item-y 8)
      (set! items (cdr items))
      (set! item (car items))))
  menu)

(defun debug-menu-context-render ((context debug-menu-context))
  "Render all menus"
  (let ((x-pos 6))
    ;; loop down the stack of menus
    (dotimes (stack-idx (-> context sel-length))
      ;; the menu being drawn at this depth
      (let ((menu (-> context sel-menu stack-idx)))
        ;; the thing that's selected at this depth.
        (let ((selection (-> menu selected-item)))
          (debug-menu-render menu x-pos 28 selection (+ (- -1 stack-idx) (-> context sel-length))))
        (set! x-pos (+ x-pos 3 (-> menu pix-width))))))
  context)

;;;;;;;;;;;;;;;;;;;;;;;;
;; navigate
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-context-select-next-or-prev-item ((context debug-menu-context) (direction int))
  "Go up or down 1 in the currently open thing. The sign of arg1 determines direction"
  (local-vars (next-item object))
  ;; search for the currently selected thing.
  (let ((menu (-> context sel-menu (+ (-> context sel-length) -1))))
    (let ((selected (-> menu selected-item))
          (previous-cell '()) ;; thing before selection
          (selected-cell '()) ;; current selection
          )
      (let ((items (-> menu items)))
        (while (not (null? items))
          (when (= (car items) selected)
            (set! selected-cell items)
            (goto cfg-7))
          (set! previous-cell items)
          (set! items (cdr items))))
      (label cfg-7)
      (when (null? selected-cell)
        (format 0 "ERROR: Couldn't find selected item in menu.~%")
        (set! context context)
        (goto cfg-19))
      (cond
        ((>= direction 0) (if (null? (cdr selected-cell)) (set! next-item (car (-> menu items))) (set! next-item (car (cdr selected-cell)))))
        ((null? previous-cell) (set! next-item (car (last (-> menu items)))))
        (else (set! next-item (car previous-cell)))))
    (set! (-> menu selected-item) (the-as debug-menu-item next-item)))
  (label cfg-19)
  context)

(defun debug-menu-context-select-new-item ((context debug-menu-context) (offset int))
  "Move the current selection by offset entries, shortening the move at either end and wrapping
   only when the selection already starts on the first or last entry."
  (let* ((menu (-> context sel-menu (+ (-> context sel-length) -1)))
         (selected (-> menu selected-item))
         (item-count 0)
         (selected-index -1))
    (let ((items (-> menu items)))
      (while (not (null? items))
        (if (= (car items) selected) (set! selected-index item-count))
        (set! items (cdr items))
        (+! item-count 1)))
    (when (= selected-index -1)
      (format 0 "ERROR: Couldn't find selected item in menu.~%")
      (set! context context)
      (goto cfg-25))
    (cond
      ((>= offset 0)
       (cond
         ((= selected-index (+ item-count -1)) (set! offset 1))
         ((>= (+ selected-index offset) item-count) (set! offset (+ (- -1 selected-index) item-count))))
       (dotimes (i offset)
         (debug-menu-context-select-next-or-prev-item context 1)))
      (else
       (cond
         ((zero? selected-index) (set! offset -1))
         ((< (+ selected-index offset) 0) (set! offset (- selected-index))))
       (dotimes (i (- offset))
         (debug-menu-context-select-next-or-prev-item context -1)))))
  (label cfg-25)
  context)

(defun debug-menu-context-open-submenu ((context debug-menu-context) (submenu debug-menu))
  "Push a nonempty submenu onto the selection stack, select its first item when needed, and
   activate its entries. Refuse stacks deeper than eight menus."
  (let ((depth (-> context sel-length)))
    (when (>= depth 8)
      (format 0 "ERROR: Trying to exceed maximum menu depth!")
      (return submenu))
    (when (null? (-> submenu items))
      (format 0 "ERROR: Submenu has no items!")
      (return submenu))
    (set! (-> context sel-menu depth) submenu)
    (if (not (-> submenu selected-item)) (set! (-> submenu selected-item) (the-as debug-menu-item (-> submenu items car))))
    (set! (-> context sel-length) (+ depth 1)))
  (debug-menu-context-send-msg context (debug-menu-msg activate) (debug-menu-dest current-selection)))

(defun debug-menu-context-close-submenu ((context debug-menu-context))
  "Deactivate the current menu, then pop it from the open-menu stack when it is below the root."
  (debug-menu-context-send-msg context (debug-menu-msg deactivate) (debug-menu-dest current-selection))
  (if (< 1 (-> context sel-length)) (+! (-> context sel-length) -1))
  context)

;;;;;;;;;;;;;;;;;;;;;;;;
;; message handling
;;;;;;;;;;;;;;;;;;;;;;;;

;; items each have their own handlers for messages.

(defun debug-menu-item-submenu-msg ((item debug-menu-item-submenu) (message debug-menu-msg))
  "Open the item's submenu when it receives a press message."
  ;; on press, open the submenu
  (when (= message (debug-menu-msg press))
    (let ((context (-> item parent context))) (debug-menu-context-open-submenu context (-> item submenu))))
  item)

(defun debug-menu-item-function-msg ((item debug-menu-item-function) (message debug-menu-msg))
  "Invoke the item's callback on press and set a short blue or red highlight according to its
   result. Clear the highlight when the item is deactivated."
  (cond
    ((= message (debug-menu-msg press))
     ;; on press, call the function!
     (cond
       ((-> item activate-func)
        (if ((-> item activate-func) (-> item id)) (set! (-> item hilite-timer) 6) (set! (-> item hilite-timer) -6)))
       (else (set! (-> item hilite-timer) -6))))
    ((= message (debug-menu-msg deactivate))
     ;; on deactivate, clear hilite.
     (set! (-> item hilite-timer) 0)
     0))
  item)

(defun debug-menu-item-flag-msg ((item debug-menu-item-flag) (message debug-menu-msg))
  "Toggle the flag callback on press, query it on update or activation, and refresh the open menus
   after a change."
  (cond
    ((= message (debug-menu-msg press))
     ;; on press, call the function.
     (if (-> item activate-func) (set! (-> item is-on) ((-> item activate-func) (-> item id) (debug-menu-msg press))))
     ;; also update all open menus.
     (let ((context (-> item parent context)))
       (debug-menu-context-send-msg context (debug-menu-msg update) (debug-menu-dest open-menus))))
    ((or (= message (debug-menu-msg update)) (= message (debug-menu-msg activate)))
     ;; just query the value.
     (if (-> item activate-func) (set! (-> item is-on) ((-> item activate-func) (-> item id) (debug-menu-msg update))))
     ;; update the refresh counter.
     (set! (-> item refresh-ctr) (-> item refresh-delay))))
  item)

;;;;;;;;;;;;;;;;;;;;;;;;
;; joypad handling
;;;;;;;;;;;;;;;;;;;;;;;;

(defun debug-menu-item-var-joypad-handler ((item debug-menu-item-var))
  "Edit the grabbed variable from the directional pad. Begin with the configured step, repeat after
   a short delay, and double the step every 30 held frames up to the numeric cap. Releasing X
   commits the value; pressing Circle while releasing restores the saved value."
  (cond
    ((not (cpad-hold? 0 x))
     (let ((context (-> item parent context))) (debug-menu-context-release-joypad context))
     (set! (-> item grabbed-joypad-p) #f)
     (when (cpad-pressed? 0 circle)
       (cond
         ((-> item float-p)
          (if (-> item factivate-func)
            (set! (-> item fval) ((-> item factivate-func) (-> item id) (debug-menu-msg press) (-> item fundo-val) (-> item fval)))))
         (else
          (if (-> item factivate-func)
            (set! (-> item fval)
                  (the-as float
                          ((the-as (function int int int int int) (-> item factivate-func))
                           (-> item id)
                           4
                           (the-as int (-> item fundo-val))
                           (the-as int (-> item fval))))))))
       (debug-menu-item-var-update-display-str item))
     (let ((context (-> item parent context)))
       (debug-menu-context-send-msg context (debug-menu-msg update) (debug-menu-dest open-menus))))
    ((or (cpad-hold? 0 right) (cpad-hold? 0 left) (cpad-hold? 0 down) (cpad-hold? 0 up))
     (let ((direction (cond
                    ((cpad-hold? 0 right) 10)
                    ((cpad-hold? 0 up) 1)
                    ((cpad-hold? 0 down) -1)
                    (else -10))))
       (when (!= direction (-> item inc-dir))
         (set! (-> item inc-dir) direction)
         (set! (-> item inc-delay) 15)
         (set! (-> item inc-delay-ctr) 0)
         (set! (-> item step-delay-ctr) 30)
         (set! (-> item fstep) (-> item fstart-inc))
         (set! (-> item fstep) (-> item fstart-inc))))
     (cond
       ((<= (-> item inc-delay-ctr) 0)
        (if (> (-> item inc-delay) 0) (+! (-> item inc-delay) -1))
        (when (zero? (-> item inc-delay))
          (cond
            ((<= (-> item step-delay-ctr) 0)
             (set! (-> item step-delay-ctr) 30)
             (cond
               ((-> item float-p) (if (< (-> item fstep) 10000000.0) (set! (-> item fstep) (* 2.0 (-> item fstep)))))
               (else
                (if (< (the-as int (-> item fstep)) #x989680) (set! (-> item fstep) (the-as float (* (the-as int (-> item fstep)) 2)))))))
            (else (+! (-> item step-delay-ctr) -1))))
        (set! (-> item inc-delay-ctr) (-> item inc-delay))
        (cond
          ((-> item float-p)
           (when (-> item factivate-func)
             (let ((new-float-value (+ (-> item fval) (* (the float (-> item inc-dir)) (-> item fstep)))))
               (if (-> item range-p) (set! new-float-value (fmin (fmax new-float-value (-> item frange-min)) (-> item frange-max))))
               (set! (-> item fval) ((-> item factivate-func) (-> item id) (debug-menu-msg press) new-float-value (-> item fval))))))
          (else
           (when (-> item factivate-func)
             (let ((new-int-value (+ (the-as int (-> item fval)) (* (-> item inc-dir) (the-as int (-> item fstep))))))
               (if (-> item range-p) (set! new-int-value (min (max new-int-value (the-as int (-> item frange-min))) (the-as int (-> item frange-max)))))
               (set! (-> item fval)
                     (the-as float
                             ((the-as (function int int int int int) (-> item factivate-func)) (-> item id) 4 new-int-value (the-as int (-> item fval)))))))))
        (debug-menu-item-var-update-display-str item)
        (let ((context (-> item parent context)))
          (debug-menu-context-send-msg context (debug-menu-msg update) (debug-menu-dest current-selection))))
       (else (+! (-> item inc-delay-ctr) -1))))
    (else (set! (-> item inc-dir) 0) 0))
  item)

(defun debug-menu-item-var-msg ((item debug-menu-item-var) (message debug-menu-msg))
  "Begin variable editing on press, save the undo value, release the joypad on deactivation, and
   query the callback on update or activation."
  (cond
    ((= message (debug-menu-msg deactivate))
     (when (-> item grabbed-joypad-p)
       (let ((context (-> item parent context))) (debug-menu-context-release-joypad context))
       (set! (-> item grabbed-joypad-p) #f)))
    ((= message (debug-menu-msg press))
     (when (not (-> item grabbed-joypad-p))
       (let ((context (-> item parent context)))
         (when (debug-menu-context-grab-joypad context item (the-as (function basic none) debug-menu-item-var-joypad-handler))
           (set! (-> item grabbed-joypad-p) #t)
           (set! (-> item fundo-val) (-> item fval))
           (set! (-> item fundo-val) (-> item fval))
           (set! (-> item inc-dir) 0)
           0))))
    ((or (= message (debug-menu-msg update)) (= message (debug-menu-msg activate)))
     (cond
       ((-> item float-p)
        (if (-> item factivate-func)
          (set! (-> item fval) ((-> item factivate-func) (-> item id) (debug-menu-msg update) (-> item fval) (-> item fval)))))
       (else
        (if (-> item factivate-func)
          (set! (-> item fval)
                (the-as float
                        ((the-as (function int int int int int) (-> item factivate-func))
                         (-> item id)
                         3
                         (the-as int (-> item fval))
                         (the-as int (-> item fval))))))))
     (debug-menu-item-var-update-display-str item)
     (set! (-> item refresh-ctr) (-> item refresh-delay))))
  item)

(defun debug-menu-item-send-msg ((item debug-menu-item) (message debug-menu-msg))
  "Call the appropriate message handler for the given item."
  (cond
    ((= (-> item type) debug-menu-item-submenu) (debug-menu-item-submenu-msg (the-as debug-menu-item-submenu item) message))
    ((= (-> item type) debug-menu-item-function) (debug-menu-item-function-msg (the-as debug-menu-item-function item) message))
    ((= (-> item type) debug-menu-item-flag) (debug-menu-item-flag-msg (the-as debug-menu-item-flag item) message))
    ((= (-> item type) debug-menu-item-var) (debug-menu-item-var-msg (the-as debug-menu-item-var item) message))
    (else (format 0 "ERROR: Found unknown item type!~%")))
  item)

(defun-recursive debug-menu-send-msg debug-menu ((menu debug-menu) (message debug-menu-msg) (recursive symbol))
  "Send to all items in menu. Arg2 picks if we are recursive or not."
  (let* ((items (-> menu items))
         (item (car items)))
    (while (not (null? items))
      (debug-menu-item-send-msg (the-as debug-menu-item item) message)
      (if (and recursive (= (-> (the-as debug-menu-item item) type) debug-menu-item-submenu))
        (debug-menu-send-msg (-> (the-as debug-menu-item-submenu item) submenu) message #t))
      (set! items (cdr items))
      (set! item (car items))))
  menu)

(defun debug-menu-context-send-msg ((context debug-menu-context) (message debug-menu-msg) (destination debug-menu-dest))
  "Send the arg1 message to the given place."
  (cond
    ((= destination (debug-menu-dest root))
     ;; sent to root, recursively. This will hit the whole menu.
     (debug-menu-send-msg (-> context root-menu) message #t))
    ((= destination (debug-menu-dest open-menus))
     ;; only send to open things
     (when (-> context is-active) ;; only if context is open
       (dotimes (i (-> context sel-length)) ;; go through stack
         (let ((menu (-> context sel-menu i)))
           ;; send, not recursive
           (debug-menu-send-msg menu message #f)))))
    ((= destination (debug-menu-dest current-selection))
     (when (-> context is-active) ;; context open
       (if (nonzero? (-> context sel-length)) ;; something in the stack
         (debug-menu-send-msg (-> context sel-menu (+ (-> context sel-length) -1)) message #f) ;; send to that.
         )))
    ((= destination (debug-menu-dest activation))
     ;; this is a special case for when we want to activate or deactivate something.
     (cond
       ((= message (debug-menu-msg activate))
        (when (not (-> context is-active))
          (set! (-> context is-active) #t)
          (debug-menu-context-send-msg context (debug-menu-msg activate) (debug-menu-dest open-menus))))
       ((= message (debug-menu-msg deactivate))
        (when (-> context is-active)
          (debug-menu-context-send-msg context (debug-menu-msg deactivate) (debug-menu-dest open-menus))
          (set! (-> context is-active) #f))))))
  context)

(defun debug-menu-context-activate-selection ((context debug-menu-context))
  "Press on the selected thing. Note that we named this enum press, not activate."
  (let ((item (-> context sel-menu (+ (-> context sel-length) -1) selected-item)))
    (debug-menu-item-send-msg item (debug-menu-msg press)))
  context)

(defun debug-menus-default-joypad-func ((context debug-menu-context))
  "Control the menu from the joystick"
  (cond
    ((cpad-pressed? 0 square)
     (cond
       ((< 1 (-> context sel-length)) (debug-menu-context-close-submenu context))
       (else)))
    ((cpad-pressed? 0 x) (debug-menu-context-activate-selection context))
    ((cpad-pressed? 0 up) (debug-menu-context-select-new-item context -1))
    ((cpad-pressed? 0 down) (debug-menu-context-select-new-item context 1))
    ((cpad-pressed? 0 left) (debug-menu-context-select-new-item context -5))
    ((cpad-pressed? 0 right) (debug-menu-context-select-new-item context 5)))
  context)

(defun debug-menus-active ((context debug-menu-context))
  "Run the menu context"
  (when (not (-> context is-hidden))
    ;; grab inputs
    (if (-> context joypad-func) ((-> context joypad-func) (-> context joypad-item)) (debug-menus-default-joypad-func context))
    ;; render
    (debug-menu-context-render context))
  context)

(defun debug-menus-handler ((context debug-menu-context))
  "Update and draw the menu context while it is active."
  (if (-> context is-active) (debug-menus-active context))
  context)