(local {: vm : org} (require :bitsy.defs))
(local {: hi : lo} (require :lib.util))

(vm:def :draw-pchar ; pscreen pchar --
  [:block
    [:ldy 7] [:clc]
  :loop
    [:lda [vm.TOP :x]]
    [:sta [vm.ST1 :x]]
    [:inc vm.TOP :x]
    [:lda vm.ST1H :x] [:adc 4] [:sta vm.ST1H :x]
    [:dey]
    [:bne :loop]
  ]
  (vm:drop) (vm:drop))

(vm:def :lookup-pchar ; c -- pchar
  [:sec]
  [:lda vm.TOP :x]
  [:sbc 0x20]
  [:sta vm.TOP :x]
  [:lda 0]
  [:asl vm.TOP :x] [:rol :a] ;x2
  [:asl vm.TOP :x] [:rol :a] ;x4
  [:asl vm.TOP :x] [:rol :a] ;x8
  [:adc #(hi ($1:lookup-addr :font))]
  [:sta vm.TOPH :x])

(vm:word :draw-char ; pscreen c --
  :lookup-pchar :draw-pchar)
(vm:word :draw-digit ; pscreen n --
    0x30 :+ :draw-char)

(vm:word :snooze (vm:for))
(vm:word :textsnooze 0x30 :snooze)
(vm:word :draw-text1 0x2257 :draw-text)
(vm:word :draw-text2 0x22d7 :draw-text)
(vm:word :draw-text3 0x2357 :draw-text)
(vm:word :draw-text4 0x23d7 :draw-text)
(vm:word :draw-text ; st pscreen --
  (vm:while [:over :bget :dup] ; st pscreen c
    :over :swap :draw-char ; st pscreen
    :textsnooze
    :inc :swap :inc :swap)
  :drop :drop :drop)
(vm:word :cleartext
  0x2257 :clearline 0x22d7 :clearline 0x2357 :clearline 0x23d7 :clearline)

(vm:word :wait-for-return (vm:until :read-key (string.byte "\r") :=))
(vm:word :dismiss-dialog :wait-for-return :cleartext)

(vm:var :footer-displayed vm.false)
(vm:word :show-footer :footer-displayed :get :not (vm:when vm.true :footer-displayed :set :drawfooter))
(vm:word :hide-footer :footer-displayed :get (vm:when vm.false :footer-displayed :set :clearfooter))