import logging

from functools import wraps

from data import model


logger = logging.getLogger(__name__)


def _raise_unauthorized(repository, scopes):
  raise StandardError("Unauthorized acces to %s", repository)


def _get_reponame_kwargs(*args, **kwargs):
  return [kwargs['namespace_name'], kwargs['repo_name']]


def require_repo_permission(permission_class, scopes=None, allow_public=False,
                            raise_method=_raise_unauthorized,
                            get_reponame_method=_get_reponame_kwargs):
  def wrapper(func):
    @wraps(func)
    def wrapped(*args, **kwargs):
      namespace_name, repo_name = get_reponame_method(*args, **kwargs)

      logger.debug('Checking permission %s for repo: %s/%s', permission_class,
                   namespace_name, repo_name)
      permission = permission_class(namespace_name, repo_name)
      if (permission.can() or
          (allow_public and
           model.repository.repository_is_public(namespace_name, repo_name))):
        return func(*args, **kwargs)
      repository = namespace_name + '/' + repo_name
      raise_method(repository, scopes)
    return wrapped
  return wrapper