import datetime
from datetime import date

from django.conf import settings
from django.core import mail, signing
from django.http import HttpResponseBadRequest
from django.test import TestCase
from django.urls import reverse

from RIGS import models


class BaseCase(TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.vatrate = models.VatRate.objects.create(start_at='2014-03-05', rate=0.20, comment='test1')
        cls.profile = models.Profile.objects.get_or_create(
            first_name='Test',
            last_name='TEC User',
            username='eventauthtest',
            email='teccie@functional.test',
            is_superuser=True  # lazily grant all permissions
        )[0]

    def setUp(self):
        super().setUp()
        self.profile.set_password('testuser')
        self.profile.save()
        self.assertTrue(self.client.login(username=self.profile.username, password='testuser'))
        venue = models.Venue.objects.create(name='Authorisation Test Venue')
        client = models.Person.objects.create(name='Authorisation Test Person', email='authorisation@functional.test')
        organisation = models.Organisation.objects.create(name='Authorisation Test Organisation', union_account=True)
        self.event = models.Event.objects.create(
            name='Authorisation Test',
            start_date=date.today(),
            venue=venue,
            person=client,
            organisation=organisation,
        )


class TestEventValidation(BaseCase):
    def test_create(self):
        url = reverse('event_create')
        # end time before start access after start
        response = self.client.post(url, {'start_date': datetime.date(2020, 1, 1), 'start_time': datetime.time(10, 00), 'end_time': datetime.time(9, 00), 'access_at': datetime.datetime(2020, 1, 5, 10)})
        self.assertFormError(response, 'form', 'end_time', "Unless you've invented time travel, the event can't finish before it has started.")
        self.assertFormError(response, 'form', 'access_at', "Regardless of what some clients might think, access time cannot be after the event has started.")


class ClientEventAuthorisationTest(BaseCase):
    auth_data = {
        'name': 'Test ABC',
        'po': '1234ABCZXY',
        'account_code': 'ABC TEST 12345',
        'uni_id': 1234567890,
        'tos': True
    }

    def setUp(self):
        super().setUp()
        self.hmac = signing.dumps({'pk': self.event.pk, 'email': 'authemail@function.test',
                                   'sent_by': self.profile.pk})
        self.url = reverse('event_authorise', kwargs={'pk': self.event.pk, 'hmac': self.hmac})

    def test_requires_valid_hmac(self):
        bad_hmac = self.hmac[:-1]
        url = reverse('event_authorise', kwargs={'pk': self.event.pk, 'hmac': bad_hmac})
        response = self.client.get(url)
        self.assertIsInstance(response, HttpResponseBadRequest)
        # TODO: Add some form of sensbile user facing error
        # self.assertIn(response.content, "new URL")  # check there is some level of sane instruction

        response = self.client.get(self.url)
        self.assertContains(response, self.event.organisation.name)

    def test_validation(self):
        response = self.client.get(self.url)
        self.assertContains(response, "Terms of Hire")
        self.assertContains(response, "Account code")
        self.assertContains(response, "University ID")

        response = self.client.post(self.url)
        self.assertContains(response, "This field is required.", 5)

        data = self.auth_data
        data['amount'] = self.event.total + 1

        response = self.client.post(self.url, data)
        self.assertContains(response, "The amount authorised must equal the total for the event")
        self.assertNotContains(response, "This field is required.")

        data['amount'] = self.event.total
        response = self.client.post(self.url, data)
        self.assertContains(response, "Your event has been authorised")

        self.event.refresh_from_db()
        self.assertTrue(self.event.authorised)
        self.assertEqual(self.event.authorisation.email, "authemail@function.test")

    def test_duplicate_warning(self):
        auth = models.EventAuthorisation.objects.create(event=self.event, name='Test ABC', email='dupe@functional.test',
                                                        amount=self.event.total, sent_by=self.profile)
        response = self.client.get(self.url)
        self.assertContains(response, 'This event has already been authorised.')

        auth.amount += 1
        auth.save()

        response = self.client.get(self.url)
        self.assertContains(response, 'amount has changed')

    def test_email_sent(self):
        mail.outbox = []

        data = self.auth_data
        data['amount'] = self.event.total

        response = self.client.post(self.url, data)
        self.assertContains(response, "Your event has been authorised.")
        self.assertEqual(len(mail.outbox), 2)

        self.assertEqual(mail.outbox[0].to, ['authemail@function.test'])
        self.assertEqual(mail.outbox[1].to, [settings.AUTHORISATION_NOTIFICATION_ADDRESS])


class TECEventAuthorisationTest(BaseCase):
    def setUp(self):
        super().setUp()
        self.url = reverse('event_authorise_request', kwargs={'pk': self.event.pk})

    def test_email_check(self):
        self.profile.email = 'teccie@someotherdomain.com'
        self.profile.save()

        response = self.client.post(self.url)

        self.assertContains(response, 'must have an @nottinghamtec.co.uk email address')

    def test_request_send(self):
        self.profile.email = 'teccie@nottinghamtec.co.uk'
        self.profile.save()
        response = self.client.post(self.url)
        self.assertContains(response, 'This field is required.')

        mail.outbox = []

        response = self.client.post(self.url, {'email': 'client@functional.test'})
        self.assertEqual(response.status_code, 302)
        self.assertEqual(len(mail.outbox), 1)
        email = mail.outbox[0]
        self.assertIn('client@functional.test', email.to)
        self.assertIn('/event/%d/' % (self.event.pk), email.body)

        # Check sent by details are populated
        self.event.refresh_from_db()
        self.assertEqual(self.event.auth_request_by, self.profile)
        self.assertEqual(self.event.auth_request_to, 'client@functional.test')
        self.assertIsNotNone(self.event.auth_request_at)