#!/usr/bin/env python3
from typing import List
from lib.pretty_print import pretty_print_html
import sys

def clean_html(filenames: List[str]) -> None:
    for fn in filenames:
        print('Prettifying: %s' % (fn,))
        with open(fn) as f:
            html = f.read()
        phtml = pretty_print_html(html)
        with open(fn, 'w') as f:
            f.write(phtml)

if __name__ == '__main__':
    # If command arguments are provided, we only check those filenames.
    # Otherwise, we display a message
    filenames = sys.argv[1:]
    if filenames:
        clean_html(filenames)
        sys.exit(0)
    print('Please specify at least one file to prettify')
    sys.exit(1)
