import dkim.dknewkey as _dknewkey
from os.path import dirname as _dirname, abspath as _abspath, join as _join, isfile as _isfile, isdir as _isdir
from os import makedirs as _makedirs
from shutil import rmtree as _rmtree
import __main__

def _eprint(*args, **kwargs):
    pass

_dknewkey.eprint = _eprint


_HERE = _dirname(_dirname(_abspath(__main__.__file__)))
_DKIM_DIR = _join(_HERE, 'pki/dkim')


def get_dkim_key(domain_name_eth0, domain):
    dkim_dir = _join(_DKIM_DIR, domain_name_eth0, domain)
#    dkim_file_src = _join(dkim_dir, f'{domain}')
    dkim_file_key = _join(dkim_dir, f'{domain}.key')
    dkim_file = _join(dkim_dir, f'{domain}.dns')
    if not _isfile(dkim_file):
        if _isdir(dkim_dir):
            _rmtree(dkim_dir)
        _makedirs(dkim_dir)
        priv_key = _dknewkey.GenRSAKeys(dkim_file_key)
        _dknewkey.ExtractRSADnsPublicKey(dkim_file_key, dkim_file)
#        priv_key = _dknewkey.GenEd25519Keys(dkim_file_key)
#        _dknewkey.ExtractEd25519PublicKey(dkim_file_src, priv_key)
    with open(dkim_file_key, 'r') as fh:
        return fh.read().strip()