import os
import unittest
from typing import Optional

from cpl_translation import TranslationService, TranslatePipe, TranslationSettings
from unittests_cli.constants import TRANSLATION_PATH


class TranslationTestCase(unittest.TestCase):

    def __init__(self, methodName: str):
        unittest.TestCase.__init__(self, methodName)
        self._translation: Optional[TranslationService] = None
        self._translate: Optional[TranslatePipe] = None

    def setUp(self):
        os.chdir(os.path.abspath(TRANSLATION_PATH))
        self._translation = TranslationService()
        settings = TranslationSettings()
        settings.from_dict({
            "Languages": [
                "de",
                "en"
            ],
            "DefaultLanguage": "en"
        })
        self._translation.load_by_settings(settings)
        self._translation.set_default_lang('de')
        self._translate = TranslatePipe(self._translation)

    def cleanUp(self):
        pass

    def test_service(self):
        self.assertEqual('Hallo Welt', self._translation.translate('main.text.hello_world'))
        self._translation.set_lang('en')
        self.assertEqual('Hello World', self._translation.translate('main.text.hello_world'))
        with self.assertRaises(KeyError) as ctx:
            self._translation.translate('main.text.hallo_welt')

        self.assertTrue(type(ctx.exception) == KeyError)
        self.assertIn('Translation main.text.hallo_welt not found', str(ctx.exception))

        with self.assertRaises(FileNotFoundError) as ctx:
            self._translation.load('DE')

        self.assertTrue(type(ctx.exception) == FileNotFoundError)

        with self.assertRaises(KeyError) as ctx:
            self._translation.set_lang('DE')

        self.assertTrue(type(ctx.exception) == KeyError)

        with self.assertRaises(KeyError) as ctx:
            self._translation.set_default_lang('DE')

        self.assertTrue(type(ctx.exception) == KeyError)

    def test_pipe(self):
        self.assertEqual('Hallo Welt', self._translate.transform('main.text.hello_world'))
        self._translation.set_lang('en')
        self.assertEqual('Hello World', self._translate.transform('main.text.hello_world'))
        with self.assertRaises(KeyError) as ctx:
            self._translation.translate('main.text.hallo_welt')

        self.assertTrue(type(ctx.exception) == KeyError)
        self.assertIn('Translation main.text.hallo_welt not found', str(ctx.exception))