import os, random, math

# From http://stackoverflow.com/a/566752/1753929
def getTerminalSize():
    import os
    env = os.environ
    def ioctl_GWINSZ(fd):
        try:
            import fcntl, termios, struct, os
            cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ,
        '1234'))
        except:
            return
        return cr
    cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
    if not cr:
        try:
            fd = os.open(os.ctermid(), os.O_RDONLY)
            cr = ioctl_GWINSZ(fd)
            os.close(fd)
        except:
            pass
    if not cr:
        cr = (env.get('LINES', 25), env.get('COLUMNS', 80))

        ### Use get(key[, default]) instead of a try/catch
        #try:
        #    cr = (env['LINES'], env['COLUMNS'])
        #except:
        #    cr = (25, 80)
    return int(cr[1]), int(cr[0])


os.system("clear")

styles = {
    "Bold & Bright": "1",
    "Dim": "2",
    "Underlined": "4",
    "Blink": "5",
    "Inverted": "7",
    # "Hidden": "8", wont be visible :(
    "Reset": "0"
}

print("\033[1mStyles:\033[0m")

styleSpace = max(list(map(len, styles)))

print("|", end=' ')

for style in sorted(styles):
    text = "\033[" + styles[style] + "m" + style + "\033[0m" + " \\033[" + styles[style] + "m"
    print(" " * int(math.floor((styleSpace - len(text)) / 2.0)) + text + " " * int(math.ceil((styleSpace - len(text)) / 2)) + " |", end=' ')
print()


print("\n")

print("".join(["\033[38;5;" + str(random.randrange(0, 255)) + "m" + letter for letter in "Colors:"]))

numsPerLine = getTerminalSize()[0] / 18

for colorType in [38, 48]:
    currentNumsPerLine = 0
    for color in range(256):
        esc = "[" + str(colorType) + ";5;" + str(color) + "m"
        print("\033" + esc + "\\033" + esc + "\033[0m\t", end=' ')
        currentNumsPerLine += 1
        if currentNumsPerLine > numsPerLine:
            print()
            currentNumsPerLine = 0

    print("\033[0m\n")