from __future__ import unicode_literals
import datetime
import json
from django.test import TestCase

from .generic import EventMixin

TEST_EVENT_DATA = {
    'title': 'Täst',
    'description': 'Teßt',
    'mode': 'joint',
    'sport': 'W',
    'level': 'beginner',
    'first_day': datetime.date(2019, 3, 1),
    'country': 'DE',
    'trainer_firstname': 'Übungsleiter',
    'trainer_familyname': 'Weißalles',
    'trainer_email': 'trainer@localhost',
}


class EventsTestCase(EventMixin, TestCase):
    def test_empty_changelog(self):
        data = TEST_EVENT_DATA
        event = self.create_event_by_model(data)
        event.sport = 'M'
        self.assertFalse(event.changes.exists())

    def test_changelog(self):
        data = TEST_EVENT_DATA
        event = self.create_event_by_model(data)

        event.alt_first_day = event.first_day + datetime.timedelta(1)
        event.sport = 'M'
        event.ski_lift = True
        event.save()

        event.country = 'FR'
        event.max_participants = 8
        event.save()

        changes = event.changes
        self.assertEqual(changes.count(), 2)

        subchanges = json.loads(changes.first().content)
        self.assertEqual(len(subchanges), 3)
        self.assertIn({'field': 'alt_first_day', 'refer': 'None', 'current': '2019-03-02'}, subchanges)
        self.assertIn({'field': 'sport', 'refer': 'W', 'current': 'M'}, subchanges)
        self.assertIn({'field': 'ski_lift', 'refer': 'False', 'current': 'True'}, subchanges)

        subchanges = json.loads(changes.last().content)
        self.assertEqual(len(subchanges), 2)
        self.assertIn({'field': 'country', 'refer': 'DE', 'current': 'FR'}, subchanges)
        self.assertIn({'field': 'max_participants', 'refer': '0', 'current': '8'}, subchanges)