# -*- coding: utf-8 -*-
#
# 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
import pathlib
import json

from mycroft.dialog import MustacheDialogRenderer


class DialogTest(unittest.TestCase):
    def setUp(self):
        self.stache = MustacheDialogRenderer()
        self.topdir = pathlib.Path(__file__).parent

    def test_general_dialog(self):
        """ Test the loading and filling of valid simple mustache dialogs """
        template_path = self.topdir.joinpath('./mustache_templates')
        for file in template_path.iterdir():
            if file.suffix == '.dialog':
                self.stache.load_template_file(file.name, str(file.absolute()))
                context = json.load(
                    file.with_suffix('.context.json').open(
                        'r', encoding='utf-8'))
                self.assertEqual(
                    self.stache.render(file.name, context),
                    file.with_suffix('.result').open('r',
                                                     encoding='utf-8').read())

    def test_unknown_dialog(self):
        """ Test for returned file name literals in case of unkown dialog """
        self.assertEqual(
            self.stache.render("unknown.template"), "unknown template")

    def test_multiple_dialog(self):
        """
        Test the loading and filling of valid mustache dialogs
        where a dialog file contains multiple text versions
        """
        template_path = self.topdir.joinpath('./mustache_templates_multiple')
        for file in template_path.iterdir():
            if file.suffix == '.dialog':
                self.stache.load_template_file(file.name, str(file.absolute()))
                context = json.load(
                    file.with_suffix('.context.json').open(
                        'r', encoding='utf-8'))
                results = [
                    line.strip() for line in file.with_suffix('.result').open(
                        'r', encoding='utf-8')
                ]
                # Try all lines
                for index, line in enumerate(results):
                    self.assertEqual(
                        self.stache.render(
                            file.name, index=index, context=context),
                        line.strip())
                # Test random index function
                # (bad test because non-deterministic?)
                self.assertIn(
                    self.stache.render(file.name, context=context), results)


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