from django.urls import reverse
from rest_framework import status

from dcim.models import Region, Site
from ipam.models import VLAN
from utilities.testing import APITestCase


class WritableNestedSerializerTest(APITestCase):
    """
    Test the operation of WritableNestedSerializer using VLANSerializer as our test subject.
    """

    def setUp(self):

        super().setUp()

        self.region_a = Region.objects.create(name='Region A', slug='region-a')
        self.site1 = Site.objects.create(region=self.region_a, name='Site 1', slug='site-1')
        self.site2 = Site.objects.create(region=self.region_a, name='Site 2', slug='site-2')

    def test_related_by_pk(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': self.site1.pk,
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_201_CREATED)
        self.assertEqual(response.data['site']['id'], self.site1.pk)
        vlan = VLAN.objects.get(pk=response.data['id'])
        self.assertEqual(vlan.site, self.site1)

    def test_related_by_pk_no_match(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': 999,
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_400_BAD_REQUEST)
        self.assertEqual(VLAN.objects.count(), 0)
        self.assertTrue(response.data['site'][0].startswith("Related object not found"))

    def test_related_by_attributes(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': {
                'name': 'Site 1'
            },
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_201_CREATED)
        self.assertEqual(response.data['site']['id'], self.site1.pk)
        vlan = VLAN.objects.get(pk=response.data['id'])
        self.assertEqual(vlan.site, self.site1)

    def test_related_by_attributes_no_match(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': {
                'name': 'Site X'
            },
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_400_BAD_REQUEST)
        self.assertEqual(VLAN.objects.count(), 0)
        self.assertTrue(response.data['site'][0].startswith("Related object not found"))

    def test_related_by_attributes_multiple_matches(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': {
                'region': {
                    "name": "Region A",
                },
            },
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_400_BAD_REQUEST)
        self.assertEqual(VLAN.objects.count(), 0)
        self.assertTrue(response.data['site'][0].startswith("Multiple objects match"))

    def test_related_by_invalid(self):

        data = {
            'vid': 100,
            'name': 'Test VLAN 100',
            'site': 'XXX',
        }

        url = reverse('ipam-api:vlan-list')
        response = self.client.post(url, data, format='json', **self.header)

        self.assertHttpStatus(response, status.HTTP_400_BAD_REQUEST)
        self.assertEqual(VLAN.objects.count(), 0)