import logging

from app import app
from endpoints.v2.models_pre_oci import pre_oci_model as model
from util.timedeltastring import convert_to_timedelta

logger = logging.getLogger(__name__)

min_expire_sec = convert_to_timedelta(app.config.get('LABELED_EXPIRATION_MINIMUM', '1h'))
max_expire_sec = convert_to_timedelta(app.config.get('LABELED_EXPIRATION_MAXIMUM', '104w'))

def _expires_after(value, namespace_name, repo_name, digest):
  """ Sets the expiration of a manifest based on the quay.expires-in label. """
  try:
    timedelta = convert_to_timedelta(value)
  except ValueError:
    logger.exception('Could not convert %s to timedeltastring for %s/%s@%s', value, namespace_name,
                     repo_name, digest)
    return

  total_seconds = min(max(timedelta.total_seconds(), min_expire_sec.total_seconds()),
                      max_expire_sec.total_seconds())

  logger.debug('Labeling manifest %s/%s@%s with expiration of %s', namespace_name, repo_name,
               digest, total_seconds)
  model.set_manifest_expires_after(namespace_name, repo_name, digest, total_seconds)


_LABEL_HANDLES = {
  'quay.expires-after': _expires_after,
}

def handle_label(key, value, namespace_name, repo_name, digest):
  handler = _LABEL_HANDLES.get(key)
  if handler is not None:
    handler(value, namespace_name, repo_name, digest)