from __future__ import absolute_import

from django.core.exceptions import ImproperlyConfigured
from django.core.urlresolvers import reverse
from django import forms
from django.test import TestCase
from django.utils.unittest import expectedFailure
from django.views.generic.base import View
from django.views.generic.edit import FormMixin

from . import views
from .models import Artist, Author


class FormMixinTests(TestCase):
    def test_initial_data(self):
        """ Test instance independence of initial data dict (see #16138) """
        initial_1 = FormMixin().get_initial()
        initial_1['foo'] = 'bar'
        initial_2 = FormMixin().get_initial()
        self.assertNotEqual(initial_1, initial_2)


class BasicFormTests(TestCase):
    urls = 'generic_views.urls'

    def test_post_data(self):
        res = self.client.post('/contact/', {'name': "Me", 'message': "Hello"})
        self.assertRedirects(res, 'http://testserver/list/authors/')


class ModelFormMixinTests(TestCase):
    def test_get_form(self):
        form_class = views.AuthorGetQuerySetFormView().get_form_class()
        self.assertEqual(form_class._meta.model, Author)

class CreateViewTests(TestCase):
    urls = 'generic_views.urls'

    def test_create(self):
        res = self.client.get('/edit/authors/create/')
        self.assertEqual(res.status_code, 200)
        self.assertTrue(isinstance(res.context['form'], forms.ModelForm))
        self.assertTrue(isinstance(res.context['view'], View))
        self.assertFalse('object' in res.context)
        self.assertFalse('author' in res.context)
        self.assertTemplateUsed(res, 'generic_views/author_form.html')

        res = self.client.post('/edit/authors/create/',
                        {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe>'])

    def test_create_invalid(self):
        res = self.client.post('/edit/authors/create/',
                        {'name': 'A' * 101, 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 200)
        self.assertTemplateUsed(res, 'generic_views/author_form.html')
        self.assertEqual(len(res.context['form'].errors), 1)
        self.assertEqual(Author.objects.count(), 0)

    def test_create_with_object_url(self):
        res = self.client.post('/edit/artists/create/',
                        {'name': 'Rene Magritte'})
        self.assertEqual(res.status_code, 302)
        artist = Artist.objects.get(name='Rene Magritte')
        self.assertRedirects(res, 'http://testserver/detail/artist/%d/' % artist.pk)
        self.assertQuerysetEqual(Artist.objects.all(), ['<Artist: Rene Magritte>'])

    def test_create_with_redirect(self):
        res = self.client.post('/edit/authors/create/redirect/',
                            {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/edit/authors/create/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe>'])

    def test_create_with_interpolated_redirect(self):
        res = self.client.post('/edit/authors/create/interpolate_redirect/',
                            {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe>'])
        self.assertEqual(res.status_code, 302)
        pk = Author.objects.all()[0].pk
        self.assertRedirects(res, 'http://testserver/edit/author/%d/update/' % pk)

    def test_create_with_special_properties(self):
        res = self.client.get('/edit/authors/create/special/')
        self.assertEqual(res.status_code, 200)
        self.assertTrue(isinstance(res.context['form'], views.AuthorForm))
        self.assertFalse('object' in res.context)
        self.assertFalse('author' in res.context)
        self.assertTemplateUsed(res, 'generic_views/form.html')

        res = self.client.post('/edit/authors/create/special/',
                            {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        obj = Author.objects.get(slug='randall-munroe')
        self.assertRedirects(res, reverse('author_detail', kwargs={'pk': obj.pk}))
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe>'])

    def test_create_without_redirect(self):
        try:
            res = self.client.post('/edit/authors/create/naive/',
                            {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
            self.fail('Should raise exception -- No redirect URL provided, and no get_absolute_url provided')
        except ImproperlyConfigured:
            pass

    def test_create_restricted(self):
        res = self.client.post('/edit/authors/create/restricted/',
                        {'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/accounts/login/?next=/edit/authors/create/restricted/')


class UpdateViewTests(TestCase):
    urls = 'generic_views.urls'

    def test_update_post(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.get('/edit/author/%d/update/' % a.pk)
        self.assertEqual(res.status_code, 200)
        self.assertTrue(isinstance(res.context['form'], forms.ModelForm))
        self.assertEqual(res.context['object'], Author.objects.get(pk=a.pk))
        self.assertEqual(res.context['author'], Author.objects.get(pk=a.pk))
        self.assertTemplateUsed(res, 'generic_views/author_form.html')

        # Modification with both POST and PUT (browser compatible)
        res = self.client.post('/edit/author/%d/update/' % a.pk,
                        {'name': 'Randall Munroe (xkcd)', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (xkcd)>'])

    @expectedFailure
    def test_update_put(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.get('/edit/author/%d/update/' % a.pk)
        self.assertEqual(res.status_code, 200)
        self.assertTemplateUsed(res, 'generic_views/author_form.html')

        res = self.client.put('/edit/author/%d/update/' % a.pk,
                        {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
        # Here is the expected failure. PUT data are not processed in any special
        # way by django. So the request will equal to a POST without data, hence
        # the form will be invalid and redisplayed with errors (status code 200).
        # See also #12635
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (author of xkcd)>'])

    def test_update_invalid(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.post('/edit/author/%d/update/' % a.pk,
                        {'name': 'A' * 101, 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 200)
        self.assertTemplateUsed(res, 'generic_views/author_form.html')
        self.assertEqual(len(res.context['form'].errors), 1)
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe>'])

    def test_update_with_object_url(self):
        a = Artist.objects.create(name='Rene Magritte')
        res = self.client.post('/edit/artists/%d/update/' % a.pk,
                        {'name': 'Rene Magritte'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/detail/artist/%d/' % a.pk)
        self.assertQuerysetEqual(Artist.objects.all(), ['<Artist: Rene Magritte>'])

    def test_update_with_redirect(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.post('/edit/author/%d/update/redirect/' % a.pk,
                        {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/edit/authors/create/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (author of xkcd)>'])

    def test_update_with_interpolated_redirect(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.post('/edit/author/%d/update/interpolate_redirect/' % a.pk,
                        {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (author of xkcd)>'])
        self.assertEqual(res.status_code, 302)
        pk = Author.objects.all()[0].pk
        self.assertRedirects(res, 'http://testserver/edit/author/%d/update/' % pk)

    def test_update_with_special_properties(self):
        a = Author.objects.create(
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.get('/edit/author/%d/update/special/' % a.pk)
        self.assertEqual(res.status_code, 200)
        self.assertTrue(isinstance(res.context['form'], views.AuthorForm))
        self.assertEqual(res.context['object'], Author.objects.get(pk=a.pk))
        self.assertEqual(res.context['thingy'], Author.objects.get(pk=a.pk))
        self.assertFalse('author' in res.context)
        self.assertTemplateUsed(res, 'generic_views/form.html')

        res = self.client.post('/edit/author/%d/update/special/' % a.pk,
                        {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/detail/author/%d/' % a.pk)
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (author of xkcd)>'])

    def test_update_without_redirect(self):
        try:
            a = Author.objects.create(
                name='Randall Munroe',
                slug='randall-munroe',
            )
            res = self.client.post('/edit/author/%d/update/naive/' % a.pk,
                            {'name': 'Randall Munroe (author of xkcd)', 'slug': 'randall-munroe'})
            self.fail('Should raise exception -- No redirect URL provided, and no get_absolute_url provided')
        except ImproperlyConfigured:
            pass

    def test_update_get_object(self):
        a = Author.objects.create(
            pk=1,
            name='Randall Munroe',
            slug='randall-munroe',
        )
        res = self.client.get('/edit/author/update/')
        self.assertEqual(res.status_code, 200)
        self.assertTrue(isinstance(res.context['form'], forms.ModelForm))
        self.assertTrue(isinstance(res.context['view'], View))
        self.assertEqual(res.context['object'], Author.objects.get(pk=a.pk))
        self.assertEqual(res.context['author'], Author.objects.get(pk=a.pk))
        self.assertTemplateUsed(res, 'generic_views/author_form.html')

        # Modification with both POST and PUT (browser compatible)
        res = self.client.post('/edit/author/update/',
                        {'name': 'Randall Munroe (xkcd)', 'slug': 'randall-munroe'})
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), ['<Author: Randall Munroe (xkcd)>'])


class DeleteViewTests(TestCase):
    urls = 'generic_views.urls'

    def test_delete_by_post(self):
        a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        res = self.client.get('/edit/author/%d/delete/' % a.pk)
        self.assertEqual(res.status_code, 200)
        self.assertEqual(res.context['object'], Author.objects.get(pk=a.pk))
        self.assertEqual(res.context['author'], Author.objects.get(pk=a.pk))
        self.assertTemplateUsed(res, 'generic_views/author_confirm_delete.html')

        # Deletion with POST
        res = self.client.post('/edit/author/%d/delete/' % a.pk)
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), [])

    def test_delete_by_delete(self):
        # Deletion with browser compatible DELETE method
        a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        res = self.client.delete('/edit/author/%d/delete/' % a.pk)
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), [])

    def test_delete_with_redirect(self):
        a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        res = self.client.post('/edit/author/%d/delete/redirect/' % a.pk)
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/edit/authors/create/')
        self.assertQuerysetEqual(Author.objects.all(), [])

    def test_delete_with_interpolated_redirect(self):
        a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        res = self.client.post('/edit/author/%d/delete/interpolate_redirect/' % a.pk)
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/edit/authors/create/?deleted=%d' % a.pk)
        self.assertQuerysetEqual(Author.objects.all(), [])

    def test_delete_with_special_properties(self):
        a = Author.objects.create(**{'name': 'Randall Munroe', 'slug': 'randall-munroe'})
        res = self.client.get('/edit/author/%d/delete/special/' % a.pk)
        self.assertEqual(res.status_code, 200)
        self.assertEqual(res.context['object'], Author.objects.get(pk=a.pk))
        self.assertEqual(res.context['thingy'], Author.objects.get(pk=a.pk))
        self.assertFalse('author' in res.context)
        self.assertTemplateUsed(res, 'generic_views/confirm_delete.html')

        res = self.client.post('/edit/author/%d/delete/special/' % a.pk)
        self.assertEqual(res.status_code, 302)
        self.assertRedirects(res, 'http://testserver/list/authors/')
        self.assertQuerysetEqual(Author.objects.all(), [])

    def test_delete_without_redirect(self):
        try:
            a = Author.objects.create(
                name='Randall Munroe',
                slug='randall-munroe',
            )
            res = self.client.post('/edit/author/%d/delete/naive/' % a.pk)
            self.fail('Should raise exception -- No redirect URL provided, and no get_absolute_url provided')
        except ImproperlyConfigured:
            pass