#!/usr/bin/python3

# Embed a woff2 font in a static CSS file.
# Usage: woff2css in.woff2 out.css
#
# Limitations: takes weight and style information from the file name of the font.
# This script will throw an unhelpful exception if weight and style cannot
# be determined.

# @font-face {
#  font-family: "Dinish";
#  font-weight: 700;
#  font-style: bold;
#  src: url(data:font/woff2;base64,d09GMgABAAAAACzcAA0AAAAAc/wAACyGAAIAxQAAAAAAAAAAAAAAAAAAAAAAAAAAGnYbnkIcg0IGYACDHAqBpT
# }

import os
import re
import sys

if not re.search(r"\.woff2$", sys.argv[1]):
    print("Usage: woff2css *.woff2")
    sys.exit(1)

for src in sys.argv[1:]:
	m = re.match(r"([\w-]+)-(\w+)\.", os.path.basename(src))
	if m:
	    family = m.group(1)
	    style = m.group(2)
	else:
	    print("Font should be named Family-Style.woff2; could not determine font weight.")
	    sys.exit(1)

	s = ("@font-face{")
	s += (f"font-family:'{family}';")
	if style == "Bold" or style == "BoldItalic":
		s += (f"font-weight:bold;")
	if style == "Italic" or style == "BoldItalic":
		s += (f"font-style:italic;")
	s += (f"src:url('{src}')format('woff2')")
	s += ("}")
	print(s)