from ctypes import *
import msvcrt

STD_OUTPUT_HANDLE = -11
 
class COORD(Structure):
    _fields_ = [("X", c_short), ("Y", c_short)]

class CONSOLE_CURSOR_INFO(Structure):
    _fields_ = [("dwSize", c_uint32), ("bVisible", c_int)]

### print_at(c,r,s)
### prints the string s at the position (c|r)
### c is the column
### r is the row
### s is the string 
def print_at(c, r, s):
    h = windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
    windll.kernel32.SetConsoleCursorPosition(h, COORD(c, r))
    c = s.encode("windows-1252")
    windll.kernel32.WriteConsoleA(h, c_char_p(c), len(c), None, None)

### showCursor(b)
### sets the cursor visible if b is True 
### and invisible if b is False
def showCursor(b):
    h = windll.kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
    c= CONSOLE_CURSOR_INFO()
    c.dwSize = 1
    if b: c.bVisible = 1
    else: c.bVisible = 0
    windll.kernel32.SetConsoleCursorInfo(h, byref(c))   

### readkey()
### returns the last key pressed as string
### will wait for a key to be pressed if the buffer is empty
### the key will not be displayed on the console
def readkey():
    s = msvcrt.getch()
    return s.decode()

### kbhit()
### returns True if a pressed key is in the keyboard buffer
### False otherwise
def kbhit():
    return msvcrt.kbhit()