#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

from manila.i18n import _


class Resource(object):

    SHARE = 'SHARE'


class Action(object):

    ALLOCATE_HOST = ('001', _('allocate host'))

    ALL = (ALLOCATE_HOST,)


class Detail(object):

    UNKNOWN_ERROR = ('001', _('An unknown error occurred.'))
    NO_VALID_HOST = ('002', _("No storage could be allocated for this share "
                              "request. Trying again with a different size "
                              "or share type may succeed."))

    ALL = (UNKNOWN_ERROR,
           NO_VALID_HOST)

    # Exception and detail mappings
    EXCEPTION_DETAIL_MAPPINGS = {
        NO_VALID_HOST: ['NoValidHost'],
    }


def translate_action(action_id):
    action_message = next((action[1] for action in Action.ALL
                           if action[0] == action_id), None)
    return action_message or 'unknown action'


def translate_detail(detail_id):
    detail_message = next((action[1] for action in Detail.ALL
                           if action[0] == detail_id), None)
    return detail_message or Detail.UNKNOWN_ERROR[1]


def translate_detail_id(exception, detail):
    if exception is not None and isinstance(exception, Exception):
        for key, value in Detail.EXCEPTION_DETAIL_MAPPINGS.items():
            if exception.__class__.__name__ in value:
                return key[0]
    if (detail in Detail.ALL and
            detail is not Detail.EXCEPTION_DETAIL_MAPPINGS):
        return detail[0]
    return Detail.UNKNOWN_ERROR[0]