from pathlib import Path

from bx_django_utils.test_utils.html_assertion import (
    HtmlAssertionMixin,
    assert_html_response_snapshot,
)
from django.conf import LazySettings, settings
from django.contrib.auth.models import User
from django.http import FileResponse, HttpResponse
from django.test import override_settings
from django.test.testcases import TestCase
from django.urls import NoReverseMatch
from django.urls.base import reverse
from django_yunohost_integration.test_utils import generate_basic_auth
from django_yunohost_integration.views import request_media_debug_view

from findmydevice import __version__


@override_settings(DEBUG=False)
class DjangoYnhTestCase(HtmlAssertionMixin, TestCase):
    def setUp(self):
        super().setUp()

        # Always start a fresh session:
        self.client = self.client_class()

    def test_settings(self):
        assert isinstance(settings, LazySettings)
        assert settings.configured is True

        assert 'django_yunohost_integration' in settings.INSTALLED_APPS
        assert 'findmydevice.apps.FindMyDeviceConfig' in settings.INSTALLED_APPS

        assert settings.PATH_URL == 'app_path'

        def assert_path(path, end_text):
            assert isinstance(path, Path)
            path = str(path)
            assert path.endswith(end_text)

        assert_path(settings.FINALPATH, '/local_test/opt_yunohost')
        assert_path(settings.PUBLIC_PATH, '/local_test/var_www')
        assert_path(settings.LOG_FILE, '/local_test/var_log_django-fmd.log')

        assert settings.ROOT_URLCONF == 'urls'  # ./conf/urls.py

        middlewares = [entry.rsplit('.', 1)[-1] for entry in settings.MIDDLEWARE]
        assert 'SSOwatRemoteUserMiddleware' in middlewares

        auth_backends = [entry.rsplit('.', 1)[-1] for entry in settings.AUTHENTICATION_BACKENDS]
        assert 'SSOwatUserBackend' in auth_backends

    def test_urls(self):
        assert reverse('admin:index') == '/app_path/admin/'

        # The django_yunohost_integration debug view should not be available:
        with self.assertRaises(NoReverseMatch):
            reverse(request_media_debug_view)

    def test_auth(self):
        # SecurityMiddleware should redirects all non-HTTPS requests to HTTPS:
        assert settings.SECURE_SSL_REDIRECT is True
        response = self.client.get('/app_path/', secure=False)
        self.assertRedirects(
            response,
            status_code=301,  # permanent redirect
            expected_url='https://testserver/app_path/',
            fetch_redirect_response=False,
        )

        response = self.client.get('/app_path/', secure=True)
        self.assertTemplateUsed(response, 'fmd/login_info.html')
        self.assert_html_parts(
            response,
            parts=(
                '<title>Log in | Find My Device</title>',
                '<p class="errornote">To find your device, you must be logged in.</p>',
                '<a href="/yunohost/sso/">Log in</a>',
            ),
        )
        assert_html_response_snapshot(response, query_selector=None, validate=False)

    def test_web_page_as_sso_user(self):
        assert User.objects.count() == 0
        self.client.cookies['SSOwAuthUser'] = 'test'
        response = self.client.get(
            path='/app_path/',
            HTTP_REMOTE_USER='test',
            HTTP_AUTH_USER='test',
            HTTP_AUTHORIZATION='basic dGVzdDp0ZXN0MTIz',
            secure=True,
        )
        assert isinstance(response, FileResponse)

        assert User.objects.count() == 1
        user = User.objects.first()
        assert user.username == 'test'

        response2 = HttpResponse(response.getvalue())
        self.assert_html_parts(
            response2,
            parts=(
                '<title>FMD</title>',
                '<h2>Find My Device</h2>',
                '<link rel="stylesheet" href="./static/fmd_externals/style.css">',
                '<script src="./static/fmd_externals/logic.js"></script>',
            ),
        )
        assert_html_response_snapshot(response2, query_selector=None, validate=False)

    @override_settings(SECURE_SSL_REDIRECT=False)
    def test_create_unknown_user(self):
        assert User.objects.count() == 0

        self.client.cookies['SSOwAuthUser'] = 'test'

        response = self.client.get(
            path='/app_path/admin/',
            HTTP_REMOTE_USER='test',
            HTTP_AUTH_USER='test',
            HTTP_AUTHORIZATION='basic dGVzdDp0ZXN0MTIz',
        )

        assert User.objects.count() == 1
        user = User.objects.first()
        assert user.username == 'test'
        assert user.is_active is True
        assert user.is_staff is True  # Set by: django_yunohost_integration
        assert user.is_superuser is False

        assert response.status_code == 200
        self.assert_html_parts(
            response,
            parts=(
                '<title>Site administration | Find My Device admin</title>',
                '<strong>test</strong>',
                f'<a href="/app_path/admin/">Django Find My Device v{__version__}</a>',
            ),
        )

    @override_settings(SECURE_SSL_REDIRECT=False)
    def test_wrong_auth_user(self):
        assert User.objects.count() == 0

        self.client.cookies['SSOwAuthUser'] = 'test'

        response = self.client.get(
            path='/app_path/admin/',
            HTTP_REMOTE_USER='test',
            HTTP_AUTH_USER='foobar',  # <<< wrong user name
            HTTP_AUTHORIZATION='basic dGVzdDp0ZXN0MTIz',
        )

        assert User.objects.count() == 1
        user = User.objects.first()
        assert user.username == 'test'
        assert user.is_active is True
        assert user.is_staff is True  # Set by: django_yunohost_integration
        assert user.is_superuser is False

        assert response.status_code == 403  # Forbidden

    @override_settings(SECURE_SSL_REDIRECT=False)
    def test_wrong_cookie(self):
        assert User.objects.count() == 0

        self.client.cookies['SSOwAuthUser'] = 'foobar'  # <<< wrong user name

        response = self.client.get(
            path='/app_path/admin/',
            HTTP_REMOTE_USER='test',
            HTTP_AUTH_USER='test',
            HTTP_AUTHORIZATION='basic dGVzdDp0ZXN0MTIz',
        )

        assert User.objects.count() == 1
        user = User.objects.first()
        assert user.username == 'test'
        assert user.is_active is True
        assert user.is_staff is True  # Set by: django_yunohost_integration
        assert user.is_superuser is False

        assert response.status_code == 403  # Forbidden

    @override_settings(SECURE_SSL_REDIRECT=False)
    def test_wrong_authorization_user(self):
        assert User.objects.count() == 0

        self.client.cookies['SSOwAuthUser'] = 'test'

        response = self.client.get(
            path='/app_path/admin/',
            HTTP_REMOTE_USER='test',
            HTTP_AUTH_USER='test',
            HTTP_AUTHORIZATION=generate_basic_auth(
                username='foobar', password='test123'
            ),  # <<< wrong user name
        )

        assert User.objects.count() == 1
        user = User.objects.first()
        assert user.username == 'test'
        assert user.is_active is True
        assert user.is_staff is True  # Set by: django_yunohost_integration
        assert user.is_superuser is False

        assert response.status_code == 403  # Forbidden