"""
Tests for :py:mod:`contact_form.forms`.

"""
from __future__ import absolute_import, unicode_literals

import mock
from mock import MagicMock, Mock

from django.core.urlresolvers import reverse
from django.test import TestCase
from django.contrib.sites.models import Site

from contact_form.forms import ContactForm

TEST_DATA = {
    'name': 'Test User',
    'email': 'test@example.org',
    'body': 'Test message'
}


class ContactFormTest(TestCase):

    def test_constructor_needs_request(self):
        with self.assertRaises(KeyError):
            ContactForm()

    def test_constructor(self):
        request = MagicMock()
        form = ContactForm(request=request)
        self.assertTrue(hasattr(form, 'request'))
        self.assertEqual(form.request, request)
        self.assertTrue(hasattr(form, 'helper'))
        self.assertEqual(form.helper.form_action, reverse('contact_form'))
        self.assertEqual(len(form.helper.inputs), 1)
        self.assertEqual(form.helper.inputs[0].name, 'submit')

    def test_constructor_fields(self):
        request = MagicMock()
        form = ContactForm(request=request)
        self.assertEqual(len(form.fields), 3)
        self.assertIn('email', form.fields)
        self.assertIn('name', form.fields)
        self.assertIn('body', form.fields)
        self.assertEqual(len(form.data), 0)

    def test_get_context_invalid(self):
        request = MagicMock()
        form = ContactForm(request=request)
        with self.assertRaisesMessage(
                ValueError,
                'Cannot generate context from invalid contact form'):
            form.get_context()

    def test_get_context_valid_site_installed(self):
        request = MagicMock()
        form = ContactForm(request=request, data=TEST_DATA)
        context = form.get_context()
        self.assertIn('site', context)
        self.assertIn('name', context)
        self.assertIn('email', context)
        self.assertIn('body', context)

    def test_get_context_valid_site_not_installed(self):
        request = MagicMock()
        form = ContactForm(request=request, data=TEST_DATA)
        with mock.patch('contact_form.forms.Site') as sitemock:
            sitemock._meta.installed = False
            context = form.get_context()
        self.assertIn('site', context)
        self.assertIn('name', context)
        self.assertIn('email', context)
        self.assertIn('body', context)

    def test_message(self):
        request = Mock()
        request.META = {'REMOTE_ADDR': '127.0.0.1'}
        form = ContactForm(request=request, data=TEST_DATA)
        message = form.message()
        self.assertIn(TEST_DATA['name'], message)
        self.assertIn(TEST_DATA['email'], message)
        self.assertIn(TEST_DATA['body'], message)
        self.assertIn('127.0.0.1', message)

    def test_subject(self):
        request = Mock()
        form = ContactForm(request=request, data=TEST_DATA)
        subject = form.subject()
        self.assertIn(Site.objects.get_current().name, subject)
        self.assertIn(TEST_DATA['name'], subject)