import subprocess
import logging

def pandoc(text):
    # TODO: cache?
    # import hashlib
    # print(hashlib.md5("whatever your string is".encode('utf-8')).hexdigest())

    """ Pandoc command line call with piped in- and output """
    cmd = (
        'pandoc',
        '-o-',
        '--from=markdown+%s' % (
            '+'.join([
                'footnotes',
                'pipe_tables',
                'raw_html',
                'definition_lists',
                'backtick_code_blocks',
                'fenced_code_attributes',
                'shortcut_reference_links',
                'lists_without_preceding_blankline',
                'autolink_bare_uris',
            ])
        ),
        '--to=html5',
        '--quiet',
        '--no-highlight'
    )
    p = subprocess.Popen(
        cmd,
        stdin=subprocess.PIPE,
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE,
    )

    stdout, stderr = p.communicate(input=text.encode())
    if stderr:
        logging.warning(
            "Error during pandoc covert:\n\t%s\n\t%s",
            cmd,
            stderr
        )
    return stdout.decode('utf-8').strip()