# 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.

import datetime
import uuid

from keystoneclient.fixture import exception
from keystoneclient.openstack.common import timeutils


class _Service(dict):

    def add_endpoint(self, public, admin=None, internal=None,
                     tenant_id=None, **kwargs):
        kwargs['tenantId'] = tenant_id or uuid.uuid4().hex
        kwargs['publicURL'] = public
        kwargs['adminURL'] = admin or public
        kwargs['internalURL'] = internal or public

        self['endpoints'].append(kwargs)
        return kwargs


class Token(dict):
    """A V2 Keystone token that can be used for testing.

    This object is designed to allow clients to generate a correct V2 token for
    use in there test code. It should prevent clients from having to know the
    correct token format and allow them to test the portions of token handling
    that matter to them and not copy and paste sample.
    """

    def __init__(self, token_id=None,
                 expires=None, tenant_id=None, tenant_name=None, user_id=None,
                 user_name=None, **kwargs):
        super(Token, self).__init__(access=kwargs)

        self.token_id = token_id or uuid.uuid4().hex
        self.user_id = user_id or uuid.uuid4().hex
        self.user_name = user_name or uuid.uuid4().hex

        if not expires:
            expires = timeutils.utcnow() + datetime.timedelta(days=1)

        try:
            self.expires = expires
        except (TypeError, AttributeError):
            # expires should be able to be passed as a string so ignore
            self.expires_str = expires

        if tenant_id or tenant_name:
            self.set_scope(tenant_id, tenant_name)

    @property
    def root(self):
        return self['access']

    @property
    def _token(self):
        return self.root.setdefault('token', {})

    @property
    def token_id(self):
        return self._token['id']

    @token_id.setter
    def token_id(self, value):
        self._token['id'] = value

    @property
    def expires_str(self):
        return self._token['expires']

    @expires_str.setter
    def expires_str(self, value):
        self._token['expires'] = value

    @property
    def expires(self):
        return timeutils.parse_isotime(self.expires_str)

    @expires.setter
    def expires(self, value):
        self.expires_str = timeutils.isotime(value)

    @property
    def _user(self):
        return self.root.setdefault('user', {})

    @property
    def user_id(self):
        return self._user['id']

    @user_id.setter
    def user_id(self, value):
        self._user['id'] = value

    @property
    def user_name(self):
        return self._user['name']

    @user_name.setter
    def user_name(self, value):
        self._user['name'] = value

    @property
    def tenant_id(self):
        return self._token.get('tenant', {}).get('id')

    @tenant_id.setter
    def tenant_id(self, value):
        self._token.setdefault('tenant', {})['id'] = value

    @property
    def tenant_name(self):
        return self._token.get('tenant', {}).get('name')

    @tenant_name.setter
    def tenant_name(self, value):
        self._token.setdefault('tenant', {})['name'] = value

    def validate(self):
        scoped = 'tenant' in self.token
        catalog = self.root.get('serviceCatalog')

        if catalog and not scoped:
            msg = 'You cannot have a service catalog on an unscoped token'
            raise exception.FixtureValidationError(msg)

        if scoped and not self.user.get('roles'):
            msg = 'You must have roles on a token to scope it'
            raise exception.FixtureValidationError(msg)

    def add_role(self, name=None, id=None, **kwargs):
        roles = self._user.setdefault('roles', [])
        kwargs['id'] = id or uuid.uuid4().hex
        kwargs['name'] = name or uuid.uuid4().hex
        roles.append(kwargs)
        return kwargs

    def add_service(self, type, name=None, **kwargs):
        kwargs.setdefault('endpoints', [])
        kwargs['name'] = name or uuid.uuid4().hex
        service = _Service(type=type, **kwargs)
        self.root.setdefault('serviceCatalog', []).append(service)
        return service

    def set_scope(self, id=None, name=None, **kwargs):
        self._token['tenant'] = kwargs
        self.tenant_id = id or uuid.uuid4().hex
        self.tenant_name = name or uuid.uuid4().hex
