import unittest

import os
import kosmorrolib.core as core

from datetime import date
from dateutil.relativedelta import relativedelta


class CoreTestCase(unittest.TestCase):
    def test_flatten_list(self):
        self.assertEqual([0, 1, 2, 3, 4, 5, 6, 7, 8, 9], core.flatten_list([0, 1, 2, [3, 4, [5, 6], 7], 8, [9]]))

    def test_get_env(self):
        self.assertEqual(0, len(core.get_env()))

        os.environ['SOME_RANDOM_VAR'] = 'an awesome value'
        self.assertEqual(0, len(core.get_env()))

        os.environ['KOSMORRO_GREAT_VARIABLE'] = 'value'
        env = core.get_env()
        self.assertEqual(1, len(env))
        self.assertEqual('value', env.great_variable)

        os.environ['KOSMORRO_ANOTHER_VARIABLE'] = 'another value'
        env = core.get_env()
        self.assertEqual(2, len(env))
        self.assertEqual('value', env.great_variable)
        self.assertEqual('another value', env.another_variable)

        self.assertEqual("{'great_variable': 'value', 'another_variable': 'another value'}", str(env))

    def test_date_arg_parsing(self):
        self.assertEqual(core.get_date("+1y 2m3d"), date.today() + relativedelta(years=1, months=2, days=3))
        self.assertEqual(core.get_date("-1y2d"), date.today() - relativedelta(years=1, days=2))
        self.assertEqual(core.get_date("1111-11-13"), date(1111, 11, 13))

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