# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
#    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 logging
from twisted.internet import defer
from twisted.internet import reactor
from xml.etree import ElementTree

from nova import exception
from nova import flags
from nova import process
from nova import test
from nova import utils


class FlagsTestCase(test.TrialTestCase):
    def setUp(self):
        super(FlagsTestCase, self).setUp()
        self.FLAGS = flags.FlagValues()
        self.global_FLAGS = flags.FLAGS

    def test_define(self):
        self.assert_('string' not in self.FLAGS)
        self.assert_('int' not in self.FLAGS)
        self.assert_('false' not in self.FLAGS)
        self.assert_('true' not in self.FLAGS)

        flags.DEFINE_string('string', 'default', 'desc', flag_values=self.FLAGS)
        flags.DEFINE_integer('int', 1, 'desc', flag_values=self.FLAGS)
        flags.DEFINE_bool('false', False, 'desc', flag_values=self.FLAGS)
        flags.DEFINE_bool('true', True, 'desc', flag_values=self.FLAGS)

        self.assert_(self.FLAGS['string'])
        self.assert_(self.FLAGS['int'])
        self.assert_(self.FLAGS['false'])
        self.assert_(self.FLAGS['true'])
        self.assertEqual(self.FLAGS.string, 'default')
        self.assertEqual(self.FLAGS.int, 1)
        self.assertEqual(self.FLAGS.false, False)
        self.assertEqual(self.FLAGS.true, True)

        argv = ['flags_test',
                '--string', 'foo',
                '--int', '2',
                '--false',
                '--notrue']

        self.FLAGS(argv)
        self.assertEqual(self.FLAGS.string, 'foo')
        self.assertEqual(self.FLAGS.int, 2)
        self.assertEqual(self.FLAGS.false, True)
        self.assertEqual(self.FLAGS.true, False)

    def test_declare(self):
        self.assert_('answer' not in self.global_FLAGS)
        flags.DECLARE('answer', 'nova.tests.declare_flags')
        self.assert_('answer' in self.global_FLAGS)
        self.assertEqual(self.global_FLAGS.answer, 42)

        # Make sure we don't overwrite anything
        self.global_FLAGS.answer = 256
        self.assertEqual(self.global_FLAGS.answer, 256)
        flags.DECLARE('answer', 'nova.tests.declare_flags')
        self.assertEqual(self.global_FLAGS.answer, 256)

    def test_runtime_and_unknown_flags(self):
        self.assert_('runtime_answer' not in self.global_FLAGS)

        argv = ['flags_test', '--runtime_answer=60', 'extra_arg']
        args = self.global_FLAGS(argv)
        self.assertEqual(len(args), 2)
        self.assertEqual(args[1], 'extra_arg')

        self.assert_('runtime_answer' not in self.global_FLAGS)

        import nova.tests.runtime_flags

        self.assert_('runtime_answer' in self.global_FLAGS)
        self.assertEqual(self.global_FLAGS.runtime_answer, 60)