#!/usr/bin/env python3
from lib.css_parser import parse, CssParserException
from typing import Iterable
import sys
import glob
import subprocess

# check for the venv
from lib import sanity_check
sanity_check.check_venv(__file__)

def validate(fn):
    # type: (str) -> None
    text = open(fn).read()
    section_list = parse(text)
    if text != section_list.text():
        sys.stderr.write('''
FAIL: {} is being rejected by our finicky linter)
(you can manually apply the diff to fix)\n\n'''.format(fn,))
        sys.stderr.flush()

        open('/var/tmp/pretty_css.txt', 'w').write(section_list.text())
        subprocess.call(['diff', '-u', fn, '/var/tmp/pretty_css.txt'], stderr=subprocess.STDOUT)
        sys.exit(1)

def check_our_files(filenames):
    # type: (Iterable[str]) -> None
    for filename in filenames:
        if 'pygments.css' in filename:
            # This just has really strange formatting that our
            # parser doesn't like
            continue

        try:
            validate(filename)
        except CssParserException as e:
            msg = '''
                ERROR! Some CSS seems to be misformatted.
                {}
                See line {} in file {}
                '''.format(e.msg, e.token.line, filename)
            print(msg)
            sys.exit(1)

if __name__ == '__main__':
    # If command arguments are provided, we only check those filenames.
    # Otherwise, we check all possible filenames.
    filenames = sys.argv[1:]
    if not filenames:
        filenames = glob.glob('static/styles/*.css')
    check_our_files(filenames)