from mock import patch
from decimal import Decimal as D

from django.contrib.auth.models import User
from django.core.urlresolvers import reverse

from oscar.test.helpers import create_product, create_order
from oscar.test import ClientTestCase, WebTestCase
from oscar.apps.basket.models import Basket


class TestASignedInUser(WebTestCase):
    email = 'customer@example.com'
    password = 'cheeseshop'

    def setUp(self):
        self.user = User.objects.create_user('_', self.email, self.password)
        self.order = create_order(user=self.user)

    def tearDown(self):
        Basket.objects.all().delete()

    def test_can_view_their_profile(self):
        response = self.app.get(reverse('customer:summary'),
                                user=self.user)
        self.assertEqual(200, response.status_code)
        self.assertTrue(self.email in response.content)

    def test_can_update_their_email_address_and_name(self):
        profile_form_page = self.app.get(reverse('customer:profile-update'),
                                user=self.user)
        self.assertEqual(200, profile_form_page.status_code)
        form = profile_form_page.forms['profile_form']
        form['email'] = 'new@example.com'
        form['first_name'] = 'Barry'
        form['last_name'] = 'Chuckle'
        response = form.submit()
        self.assertRedirects(response, reverse('customer:summary'))

        user = User.objects.get(id=self.user.id)
        self.assertEqual('new@example.com', user.email)
        self.assertEqual('Barry', user.first_name)
        self.assertEqual('Chuckle', user.last_name)

    def test_cant_update_their_email_address_if_it_already_exists(self):
        User.objects.create_user(username='testuser', email='new@example.com',
                                 password="somerandompassword")
        self.assertEquals(User.objects.count(), 2)

        profile_form_page = self.app.get(reverse('customer:profile-update'),
                                user=self.user)
        self.assertEqual(200, profile_form_page.status_code)
        form = profile_form_page.forms['profile_form']
        form['email'] = 'new@example.com'
        form['first_name'] = 'Barry'
        form['last_name'] = 'Chuckle'
        response = form.submit()

        user = User.objects.get(id=self.user.id)
        self.assertEqual(self.email, user.email)

        try:
            User.objects.get(email='new@example.com')
        except User.MultipleObjectsReturned:
            self.fail("email for user changed to existing one")

        self.assertContains(response,
                            'A user with this email address already exists')

    def test_can_change_their_password(self):
        password_form_page = self.app.get(reverse('customer:change-password'),
                                          user=self.user)
        self.assertEqual(200, password_form_page.status_code)
        form = password_form_page.forms['change_password_form']
        form['old_password'] = self.password
        form['new_password1'] = 'bubblesgopop'
        form['new_password2'] = 'bubblesgopop'
        response = form.submit()
        self.assertRedirects(response, reverse('customer:summary'))

    def test_can_reorder_a_previous_order(self):
        order_history_page = self.app.get(reverse('customer:order-list'),
                                          user=self.user)
        form = order_history_page.forms['order_form_%d' % self.order.id]
        form.submit()

        basket = Basket.open.get(owner=self.user)
        self.assertEqual(1, basket.all_lines().count())

    def test_can_reorder_a_previous_order_line(self):
        order_history_page = self.app.get(
            reverse('customer:order',
                    kwargs={'order_number': self.order.number}),
            user=self.user)
        line = self.order.lines.all()[0]
        form = order_history_page.forms['line_form_%d' % line.id]
        form.submit()

        basket = Basket.open.get(owner=self.user)
        self.assertEqual(1, basket.all_lines().count())

    def test_cannot_reorder_an_out_of_stock_product(self):
        product = self.order.lines.all()[0].product
        product.stockrecord.num_in_stock = 0
        product.stockrecord.save()

        order_history_page = self.app.get(reverse('customer:order-list'),
                                          user=self.user)
        form = order_history_page.forms['order_form_%d' % self.order.id]
        form.submit()

        basket = Basket.open.get(owner=self.user)
        self.assertEqual(0, basket.all_lines().count())


class TestReorderingOrderLines(ClientTestCase):
    # TODO - rework this as a webtest

    @patch('django.conf.settings.OSCAR_MAX_BASKET_QUANTITY_THRESHOLD', 1)
    def test_cannot_reorder_when_basket_maximum_exceeded(self):
        order = create_order(user=self.user)
        line = order.lines.all()[0]

        Basket.objects.all().delete()
        #add a product
        product = create_product(price=D('12.00'))
        self.client.post(reverse('basket:add'), {'product_id': product.id,
                                                 'quantity': 1})


        basket = Basket.objects.all()[0]
        self.assertEquals(len(basket.all_lines()), 1)

        #try to reorder a product
        self.client.post(reverse('customer:order',
                                            args=(order.number,)),
                                    {'order_id': order.pk,
                                     'action': 'reorder'})

        self.assertEqual(len(basket.all_lines()), 1)
        self.assertNotEqual(line.product.pk, product.pk)

    @patch('django.conf.settings.OSCAR_MAX_BASKET_QUANTITY_THRESHOLD', 1)
    def test_cannot_reorder_line_when_basket_maximum_exceeded(self):
        order = create_order(user=self.user)
        line = order.lines.all()[0]

        Basket.objects.all().delete()
        #add a product
        product = create_product(price=D('12.00'))
        self.client.post(reverse('basket:add'), {'product_id': product.id,
                                                 'quantity': 1})

        basket = Basket.objects.all()[0]
        self.assertEquals(len(basket.all_lines()), 1)

        self.client.post(reverse('customer:order-line',
                                            args=(order.number, line.pk)),
                                    {'action': 'reorder'})

        self.assertEquals(len(basket.all_lines()), 1)
        self.assertNotEqual(line.product.pk, product.pk)