#!/usr/bin/env python3

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from math import sqrt


def clearscreen():
    print(chr(27) + "[2J", end='')


def resetcolor():
    print(chr(27) + "[0m", end='')


def setbghexcolor(hex):
    r = int(hex[0:2], 16)
    g = int(hex[2:4], 16)
    b = int(hex[4:6], 16)
    print(chr(27) + "[48;2;" + str(r) + ";" + str(g) + ";" + str(b) + "m", end='')


def setfgbybghex(hex):
    r = int(hex[0:2], 16)
    g = int(hex[2:4], 16)
    b = int(hex[4:6], 16)
    contrast = sqrt(r * r * .241 + g * g * .691 + b * b * .068)
    if contrast > 130:
        print(chr(27) + "[38;30m", end='')
    else:
        print(chr(27) + "[38;97m", end='')