import unittest
from wanikaniburned import app, db, User, datetime_format, parse_range
from flask.ext.testing import TestCase
from datetime import datetime


class BaseTestCase(TestCase):

    def create_app(self):
        app.config.update(
            TESTING=True,
            SQLALCHEMY_DATABASE_URI='sqlite:///:memory:',
            SECRET_KEY="testkey",
            WTF_CSRF_ENABLED=False,
            PRESERVE_CONTEXT_ON_EXCEPTION=False,
            HASH_ROUNDS=1
        )
        return app

    def setUp(self):
        db.create_all()

    def tearDown(self):
        db.session.remove()
        db.drop_all()


class TestLogin(BaseTestCase):

    def login(self):
        user = User('test', False)
        return self.client.post('/', data={'api_key': user.api_key})

    def test_user_login(self):
        response = self.login()
        self.assertRedirects(response, '/quiz')

    def test_user_logout(self):
        response = self.login()
        self.assertRedirects(response, '/quiz')
        response = self.client.get('/logout')
        self.assertRedirects(response, '/')

    def test_homepage_without_login(self):
        response = self.client.get('/')
        self.assert200(response)
        self.assertTemplateUsed("welcome.html")

    def test_quiz_inaccessible_without_login(self):
        response = self.client.get('/quiz')
        self.assertRedirects(response, '/')

    def test_user_items_inaccessible_without_login(self):
        response = self.client.get('/user_items')
        self.assertRedirects(response, '/')

    def test_homepage_with_existing_login(self):
        response = self.login()  # Login
        self.assertRedirects(response, '/quiz')
        response = self.client.get('/')  # Try to go back to the homepage
        self.assertRedirects(response, '/quiz')

    def test_user_items_with_existing_login(self):
        response = self.login()  # Login
        self.assertRedirects(response, '/quiz')
        response = self.client.get('/user_items')
        self.assert200(response)


class TestFormats(unittest.TestCase):

    def test_custom_datetime_format(self):
        test_time = datetime.min
        output = datetime_format(test_time)
        self.assertEqual(output, "01 January 0001 12:00AM")

    def test_parse_range_empty(self):
        self.assertIsNone(parse_range(""))

    def test_parse_range_letters(self):
        self.assertIsNone(parse_range("ab-st,z"))

    def test_parse_range_single_number(self):
        self.assertEqual(parse_range("1"), [1])

    def test_parse_range_two_with_dash(self):
        self.assertEqual(parse_range("1-4"), [1, 2, 3, 4])

    def test_parse_range_two_with_comma(self):
        self.assertEqual(parse_range("1,2"), [1, 2])

    def test_parse_range_dash_and_comma(self):
        self.assertEqual(parse_range("1,4-6"), [1, 4, 5, 6])


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