%output prg
%import c64lib
%import mathlib

~ main {
        str   name    = "?" * 80
        str   guess   = "?" * 80
        byte secretnumber = 0
        byte attempts_left = 10
        memory word freadstr_arg = $22		; argument for FREADSTR


start:
        c64.init_system()
        c64.VMCSB |= 2		; lowercase charset

        ; greeting
        c64scr.print_string("Enter your name: ")
        Y = c64scr.input_chars(name)
        c64.CHROUT("\n")
        c64.CHROUT("\n")
        c64scr.print_string("Hello, ")
        c64scr.print_string(name)
        c64.CHROUT(".")
        c64.CHROUT("\n")

        ; create a secret random number from 1-100
        c64.RNDA(0)             ; fac = rnd(0)
        c64.MUL10()             ; fac *= 10
        c64.MUL10()             ; .. and now *100
        c64.FADDH()             ; add 0.5..
        c64.FADDH()             ;   and again, so +1 total
        AY = c64flt.GETADRAY()
        secretnumber=A
        ;A=math.randbyte()
        ;A+=c64.RASTER
        ;A-=c64.TIME_LO
        ;X,secretnumber=math.divmod_bytes(A, 99)

        c64scr.print_string("I am thinking of a number from 1 to 100!You'll have to guess it!\n")

printloop:
        c64scr.print_string("\nYou have ")
        c64scr.print_byte_decimal(attempts_left)
        c64scr.print_string(" guess")

        ; @todo comparison expression so we can do if attempts_left>0 ...
        A = attempts_left
        A--
        ; @todo (conditional): if_zero A goto ask_guess
        c64scr.print_string("es")
ask_guess:
        c64scr.print_string(" left.\nWhat is your next guess? ")
        Y = c64scr.input_chars(guess)
        c64.CHROUT("\n")
        freadstr_arg = guess
        c64.FREADSTR(A)
        AY = c64flt.GETADRAY()
        A -= secretnumber       ; @todo condition so we can do if guess > secretnumber....
        ; @todo (conditional): if_zero goto correct_guess
        ; @todo (conditional): if_gt goto too_high
        c64scr.print_string("That is too ")
        c64scr.print_string("low!\n")
        goto continue

correct_guess:
        c64scr.print_string("\nThat's my number, impressive!\n")
        goodbye()
        return

too_high:
        c64scr.print_string("That is too ")
        c64scr.print_string("high!\n")

continue:
        attempts_left--
        ; @todo (conditional): if_zero attempts_left goto game_over
        goto printloop

game_over:
        c64scr.print_string("\nToo bad! It was: ")
        c64scr.print_byte_decimal(secretnumber)
        c64.CHROUT("\n")
        return goodbye()
        goodbye()               ; @todo fix subroutine usage tracking, it doesn't register this one
        return

sub goodbye ()->() {
        c64scr.print_string("\nThanks for playing. Bye!\n")
        return
}

}