# 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 uuid

from testtools import matchers

from keystoneauth1 import exceptions
from keystoneauth1 import loading
from keystoneauth1.tests.unit.loading import utils


class LoadingTests(utils.TestCase):

    def test_required_values(self):
        opts = [loading.Opt('a', required=False),
                loading.Opt('b', required=True)]

        Plugin, Loader = utils.create_plugin(opts=opts)

        l = Loader()
        v = uuid.uuid4().hex

        p1 = l.load_from_options(b=v)
        self.assertEqual(v, p1['b'])

        e = self.assertRaises(exceptions.MissingRequiredOptions,
                              l.load_from_options,
                              a=v)

        self.assertEqual(1, len(e.options))

        for o in e.options:
            self.assertIsInstance(o, loading.Opt)

        self.assertEqual('b', e.options[0].name)

    def test_loaders(self):
        loaders = loading.get_available_plugin_loaders()
        self.assertThat(len(loaders), matchers.GreaterThan(0))

        for l in loaders.values():
            self.assertIsInstance(l, loading.BaseLoader)

    def test_loading_getter(self):

        called_opts = []

        vals = {'a-int': 44,
                'a-bool': False,
                'a-float': 99.99,
                'a-str': 'value'}

        val = uuid.uuid4().hex

        def _getter(opt):
            called_opts.append(opt.name)
            # return str because oslo.config should convert them back
            return str(vals[opt.name])

        p = utils.MockLoader().load_from_options_getter(_getter, other=val)

        self.assertEqual(set(vals), set(called_opts))

        for k, v in vals.items():
            # replace - to _ because it's the dest used to create kwargs
            self.assertEqual(v, p[k.replace('-', '_')])

        # check that additional kwargs get passed through
        self.assertEqual(val, p['other'])

    def test_loading_getter_with_kwargs(self):
        called_opts = set()

        vals = {'a-bool': False,
                'a-float': 99.99}

        def _getter(opt):
            called_opts.add(opt.name)
            # return str because oslo.config should convert them back
            return str(vals[opt.name])

        p = utils.MockLoader().load_from_options_getter(_getter,
                                                        a_int=66,
                                                        a_str='another')

        # only the options not passed by kwargs should get passed to getter
        self.assertEqual(set(('a-bool', 'a-float')), called_opts)

        self.assertEqual(False, p['a_bool'])
        self.assertEqual(99.99, p['a_float'])
        self.assertEqual('another', p['a_str'])
        self.assertEqual(66, p['a_int'])