# Copyright 2017 Mycroft AI Inc.
#
# 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 unittest

from mycroft.skills.intent_service import ContextManager


class MockEmitter(object):
    def __init__(self):
        self.reset()

    def emit(self, message):
        self.types.append(message.type)
        self.results.append(message.data)

    def get_types(self):
        return self.types

    def get_results(self):
        return self.results

    def reset(self):
        self.types = []
        self.results = []


class ContextManagerTest(unittest.TestCase):
    emitter = MockEmitter()

    def setUp(self):
        self.context_manager = ContextManager(3)

    def test_add_context(self):
        entity = {'confidence': 1.0}
        context = 'TestContext'
        word = 'TestWord'
        entity['data'] = [(word, context)]
        entity['match'] = word
        entity['key'] = word

        self.assertEqual(len(self.context_manager.frame_stack), 0)
        self.context_manager.inject_context(entity)
        self.assertEqual(len(self.context_manager.frame_stack), 1)

    def test_remove_context(self):
        entity = {'confidence': 1.0}
        context = 'TestContext'
        word = 'TestWord'
        entity['data'] = [(word, context)]
        entity['match'] = word
        entity['key'] = word

        self.context_manager.inject_context(entity)
        self.assertEqual(len(self.context_manager.frame_stack), 1)
        self.context_manager.remove_context('TestContext')
        self.assertEqual(len(self.context_manager.frame_stack), 0)


if __name__ == '__main__':
    unittest.main()