from django.core import mail
from django.urls import reverse, reverse_lazy
from django.utils.translation import gettext_lazy as _
from webtest import AppError

from oscar.core.compat import get_user_model
from oscar.core.loading import get_model
from oscar.test.factories import ProductAlertFactory, UserFactory
from oscar.test.testcases import WebTestCase

User = get_user_model()
ProductAlert = get_model('customer', 'ProductAlert')


class IndexViewTests(WebTestCase):
    is_staff = True
    active_users_ids = []
    inactive_users_ids = []

    csrf_checks = False

    def setUp(self):
        super().setUp()
        for i in range(1, 25):
            UserFactory(is_active=True)
        for i in range(1, 25):
            UserFactory(is_active=False)

        user_queryset = User.objects.all()
        self.active_users_ids = user_queryset.filter(is_active=True).values_list('id', flat=True)
        self.inactive_users_ids = user_queryset.filter(is_active=False).values_list('id', flat=True)

    def test_user_list_view(self):
        response = self.get(reverse('dashboard:users-index'))
        self.assertInContext(response, 'users')

    def test_make_active(self):
        params = {'action': 'make_active',
                  'selected_user': self.inactive_users_ids}
        response = self.post(reverse('dashboard:users-index'), params=params)
        ex_inactive = User.objects.get(id=self.inactive_users_ids[10])
        self.assertIsRedirect(response)
        self.assertTrue(ex_inactive.is_active)

    def test_make_inactive(self):
        params = {'action': 'make_inactive',
                  'selected_user': self.active_users_ids}
        response = self.post(reverse('dashboard:users-index'), params=params)
        ex_active = User.objects.get(id=self.active_users_ids[10])
        self.assertIsRedirect(response)
        self.assertFalse(ex_active.is_active)


class DetailViewTests(WebTestCase):
    is_staff = True

    def test_user_detail_view(self):
        response = self.get(
            reverse('dashboard:user-detail', kwargs={'pk': self.user.pk}))
        self.assertInContext(response, 'user')
        self.assertIsOk(response)


class TestDetailViewForStaffUser(WebTestCase):
    is_staff = True

    def setUp(self):
        self.customer = UserFactory(
            username='jane', email='jane@example.org', password='password')
        super().setUp()

    def test_password_reset_url_only_available_via_post(self):
        try:
            reset_url = reverse(
                'dashboard:user-password-reset',
                kwargs={'pk': self.customer.id}
            )
            self.get(reset_url)
        except AppError as e:
            self.assertIn('405', e.args[0])

    def test_admin_can_reset_user_passwords(self):
        customer_page_url = reverse(
            'dashboard:user-detail',
            kwargs={'pk': self.customer.id}
        )
        customer_page = self.get(customer_page_url)
        reset_form = customer_page.forms['password_reset_form']
        response = reset_form.submit()

        # Check that the staff user is redirected back to the customer page
        self.assertRedirects(response, customer_page_url)

        # Check that the reset email has been sent
        self.assertEqual(len(mail.outbox), 1)
        self.assertIn("Resetting your password", mail.outbox[0].subject)

        # Check that success message shows up
        self.assertContains(
            response.follow(),
            _("A password reset email has been sent")
        )


class SearchTests(WebTestCase):
    is_staff = True
    url = reverse_lazy('dashboard:users-index')

    def setUp(self):
        UserFactory(
            username='lars', email='lars@example.org', first_name='Lars', last_name='van der Berg')
        UserFactory(
            username='owen', email='owen@example.org', first_name='Owen', last_name='Davies')
        UserFactory(
            username='robalan', email='robalan@example.org', first_name='Rob Alan', last_name='Lewis'
        )
        super().setUp()

    def _search_by_form_args(self, form_args):
        response = self.get(self.url)
        search_form = response.forms[0]
        for field_name, val in form_args.items():
            search_form[field_name] = val
        search_response = search_form.submit('search')
        data = search_response.context['users'].data
        return data

    def test_user_name_2_parts(self):
        data = self._search_by_form_args({'name': 'Owen Davies'})
        self.assertEqual(len(data), 1)
        self.assertEqual(data[0].email, 'owen@example.org')
        self.assertEqual(data[0].first_name, 'Owen')
        self.assertEqual(data[0].last_name, 'Davies')

    def test_user_name_3_parts(self):
        data = self._search_by_form_args({'name': 'Rob Alan Lewis'})
        self.assertEqual(len(data), 1)
        self.assertEqual(data[0].email, 'robalan@example.org')
        self.assertEqual(data[0].first_name, 'Rob Alan')
        self.assertEqual(data[0].last_name, 'Lewis')

    def test_user_name_4_parts(self):
        data = self._search_by_form_args({'name': 'Lars van der Berg'})
        self.assertEqual(len(data), 1)
        self.assertEqual(data[0].email, 'lars@example.org')
        self.assertEqual(data[0].first_name, 'Lars')
        self.assertEqual(data[0].last_name, 'van der Berg')


class ProductAlertListViewTestCase(WebTestCase):

    is_staff = True

    def test_list_view_get_queryset_ordering(self):
        ProductAlertFactory.create_batch(3)
        response = self.get(reverse('dashboard:user-alert-list'))
        self.assertEqual(
            list(response.context['alerts']),
            list(ProductAlert.objects.order_by('-date_created'))
        )

    def test_list_view_status_filtering(self):
        ProductAlertFactory.create_batch(3, status=ProductAlert.CANCELLED)
        ProductAlertFactory.create_batch(2, status=ProductAlert.ACTIVE)

        response = self.get(reverse('dashboard:user-alert-list'), params={'status': ProductAlert.ACTIVE})
        self.assertEqual(len(response.context['alerts']), 2)