module os

import term.termios

// input_password prompts the user for a password-like secret.
// It disables the terminal echo during user input and resets it back to normal when done.
pub fn input_password(prompt string) !string {
    if is_atty(1) <= 0 || getenv('TERM') == 'dumb' {
        return error('Could not obtain password discretely.')
    }

    mut old_state := termios.Termios{}
    if termios.tcgetattr(0, mut old_state) != 0 {
        return last_error()
    }

    mut new_state := old_state
    new_state.disable_echo()
    termios.set_state(0, new_state)

    password := input_opt(prompt) or { return error('Failed to read password') }

    termios.set_state(0, old_state)

    println('')
    return password
}