import os


def optimize_css(css: str) -> str:
    import re
    minified_with_comments = "".join(list(map(
        lambda line: re.sub(r'\s*([:{])\s*', r'\1', re.sub(r'^\s*', '', line)),
        css.split('\n')
    )))
    return re.sub(r'/\*[\s\S]*?\*/', "", minified_with_comments)


def optimize_css_file():
    root = os.path.dirname(os.getcwd())
    static_dir = root + '/undercover/undercover/static/'
    css = open(static_dir + 'styles.css', 'r').read()
    minified = optimize_css(css)
    with open(static_dir + 'styles_min.css', 'w') as minified_file:
        minified_file.write(minified)