# This file is part of Radicale Server - Calendar Server
# Copyright © 2014 Jean-Marc Martins
# Copyright © 2012-2017 Guillaume Ayoub
# Copyright © 2017-2018 Unrud <unrud@outlook.com>
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Radicale.  If not, see <http://www.gnu.org/licenses/>.

from importlib import import_module

from radicale.log import logger


def load_plugin(internal_types, module_name, class_name, configuration):
    type_ = configuration.get(module_name, "type")
    if callable(type_):
        logger.info("%s type is %r", module_name, type_)
        return type_(configuration)
    if type_ in internal_types:
        module = "radicale.%s.%s" % (module_name, type_)
    else:
        module = type_
    try:
        class_ = getattr(import_module(module), class_name)
    except Exception as e:
        raise RuntimeError("Failed to load %s module %r: %s" %
                           (module_name, module, e)) from e
    logger.info("%s type is %r", module_name, module)
    return class_(configuration)