import mock

from django.conf import settings
from django.test.client import Client

from django_images.models import Thumbnail

from taggit.models import Tag
from tastypie.test import ResourceTestCase

from ..pins.models import User, Pin, Image


def filter_generator_for(size):
    def wrapped_func(obj):
        return Thumbnail.objects.get_or_create_at_size(obj.pk, size)
    return wrapped_func


def mock_urlopen(url):
    return open('screenshot.png')


def mock_storage_path(self, name):
    if name == 'screenshot.png':
        return settings.SITE_ROOT + 'screenshot.png'
    return name


@mock.patch('django.core.files.storage.FileSystemStorage.path', mock_storage_path)
class ImageResourceTest(ResourceTestCase):
    fixtures = ['test_resources.json']
    pass

    def setUp(self):
        super(ImageResourceTest, self).setUp()
        self.client = Client()

    def test_list_detail(self):
        image = Image.objects.get(pk=1)
        thumbnail = filter_generator_for('thumbnail')(image)
        standard = filter_generator_for('standard')(image)
        response = self.api_client.get('/api/v1/image/', format='json')
        self.assertDictEqual(self.deserialize(response)['objects'][0], {
            u'image': image.image.url,
            u'height': image.height,
            u'width': image.width,
            u'standard': {
                u'image': unicode(standard.image.url),
                u'width': standard.width,
                u'height': standard.height,
            },
            u'thumbnail': {
                u'image': unicode(thumbnail.image.url),
                u'width': thumbnail.width,
                u'height': thumbnail.height,
            }
        })


@mock.patch('django.core.files.storage.FileSystemStorage.path', mock_storage_path)
class PinResourceTest(ResourceTestCase):
    fixtures = ['test_resources.json']

    def setUp(self):
        super(PinResourceTest, self).setUp()

        self.pin_1 = Pin.objects.get(pk=1)
        self.image_url = ''

        self.user = User.objects.get(pk=1)
        self.api_client.client.login(username=self.user.username, password='password')

    @mock.patch('urllib2.urlopen', mock_urlopen)
    def test_post_create_url(self):
        post_data = {
            'submitter': '/api/v1/user/1/',
            'url': 'http://testserver/mocked/screenshot.png',
            'description': 'That\'s an Apple!'
        }
        response = self.api_client.post('/api/v1/pin/', data=post_data)
        self.assertHttpCreated(response)
        self.assertEqual(Pin.objects.count(), 3)
        self.assertEqual(Image.objects.count(), 3)

    def test_post_create_obj(self):
        user = User.objects.get(pk=1)
        image = Image.objects.get(pk=1)
        post_data = {
            'submitter': '/api/v1/user/{}/'.format(user.pk),
            'image': '/api/v1/image/{}/'.format(image.pk),
            'description': 'That\'s something else (probably a CC logo)!',
            'tags': ['random', 'tags'],
        }
        response = self.api_client.post('/api/v1/pin/', data=post_data)
        self.assertEqual(self.deserialize(response)['id'], 3)
        self.assertHttpCreated(response)
        # A number of Image objects should stay the same as we are using an existing image
        self.assertEqual(Image.objects.count(), 2)
        self.assertEqual(Pin.objects.count(), 3)
        self.assertEquals(Tag.objects.count(), 4)

    def test_get_list_json_ordered(self):
        pin = Pin.objects.latest('id')
        response = self.api_client.get('/api/v1/pin/', format='json', data={'order_by': '-id'})
        self.assertValidJSONResponse(response)
        self.assertEqual(self.deserialize(response)['objects'][0]['id'], pin.id)

    def test_get_list_json(self):
        user = User.objects.get(pk=1)
        image = Image.objects.get(pk=1)
        standard = filter_generator_for('standard')(image)
        thumbnail = filter_generator_for('thumbnail')(image)
        response = self.api_client.get('/api/v1/pin/', format='json')
        self.assertValidJSONResponse(response)
        self.assertDictEqual(self.deserialize(response)['objects'][0], {
            u'id': self.pin_1.id,
            u'submitter': {
                u'username': user.username,
                u'gravatar': user.gravatar
            },
            u'image': {
                u'image': unicode(image.image.url),
                u'width': image.width,
                u'height': image.height,
                u'standard': {
                    u'image': unicode(standard.image.url),
                    u'width': standard.width,
                    u'height': standard.height,
                },
                u'thumbnail': {
                    u'image': unicode(thumbnail.image.url),
                    u'width': thumbnail.width,
                    u'height': thumbnail.height,
                }
            },
            u'url': self.pin_1.url,
            u'description': self.pin_1.description,
            u'tags': [u'creative-commons'],
        })