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

"""
from unittest.mock import MagicMock, Mock, patch

from django.contrib.sites.models import Site
from django.test import TestCase
from django.urls import reverse

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 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)