output prg,basic
;reg_preserve off         ; @todo global option  off/on   default off?


import "c64lib"


~ main {
        var     .text   name    = '?' * 80
        var     .text   guess   = '?' * 80
        var     secretnumber
        var     attempts_left = 10


start
        c64.init_system()

        A = c64.VMCSB
        A |= 2                  ;  @todo c64.VMCSB |= 2
        c64.VMCSB = A

        ; 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)
        c64.MUL10()
        c64.MUL10()
        c64.FADDH()
        c64.FADDH()
        AY = c64.GETADRAY()
        secretnumber = A

        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--
        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')
        [$22.word] = guess
        c64.FREADSTR(A)
        AY = c64.GETADRAY()
        A -= secretnumber       ; @todo condition so we can do if guess > secretnumber....
        if_zero goto correct_guess
        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--
        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')
        goodbye()
        return

sub goodbye ()->() {
        ;var x             ; @todo vars in sub
        ;memory y = $c000        ; @todo vars in sub
        ;const q = 22            ; @todo const in sub

        c64scr.print_string("\nThanks for playing. Bye!\n")
        return
}

}