from io import BytesIO

from django.conf import settings
from django.contrib.auth.models import Permission
from django.test import TestCase, override_settings
from django.urls import reverse
from openpyxl.reader.excel import load_workbook

from wagtail.admin.admin_url_finder import AdminURLFinder
from wagtail.contrib.frontend_cache.tests import PURGED_URLS
from wagtail.contrib.redirects import models
from wagtail.log_actions import registry as log_registry
from wagtail.models import Page, Site
from wagtail.test.routablepage.models import RoutablePageTest
from wagtail.test.utils import WagtailTestUtils
from wagtail.test.utils.template_tests import AdminTemplateTestUtils


@override_settings(
    ALLOWED_HOSTS=["testserver", "localhost", "test.example.com", "other.example.com"]
)
class TestRedirects(TestCase):
    fixtures = ["test.json"]

    def test_path_normalisation(self):
        # Shortcut to normalise function (to keep things tidy)
        normalise_path = models.Redirect.normalise_path

        # Create a path
        path = normalise_path(
            "/Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
        )

        # Test against equivalent paths
        self.assertEqual(
            path,
            normalise_path(  # The exact same URL
                "/Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Scheme, hostname and port ignored
                "http://mywebsite.com:8000/Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Leading slash can be omitted
                "Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Trailing slashes are ignored
                "Hello/world.html/;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Fragments are ignored
                "/Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2#cool"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Order of query string parameters is ignored
                "/Hello/world.html;fizz=three;buzz=five?Baz=quux2&foo=Bar"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Order of parameters is ignored
                "/Hello/world.html;buzz=five;fizz=three?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Leading whitespace
                "  /Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertEqual(
            path,
            normalise_path(  # Trailing whitespace
                "/Hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2  "
            ),
        )

        # Test against different paths
        self.assertNotEqual(
            path,
            normalise_path(  # 'hello' is lowercase
                "/hello/world.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # No '.html'
                "/Hello/world;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # Query string parameter value has wrong case
                "/Hello/world.html;fizz=three;buzz=five?foo=bar&Baz=Quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # Query string parameter name has wrong case
                "/Hello/world.html;fizz=three;buzz=five?foo=Bar&baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # Parameter value has wrong case
                "/Hello/world.html;fizz=three;buzz=Five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # Parameter name has wrong case
                "/Hello/world.html;Fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path("/Hello/world.html?foo=Bar&Baz=quux2"),  # Missing params
        )
        self.assertNotEqual(
            path,
            normalise_path(  # 'WORLD' is uppercase
                "/Hello/WORLD.html;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )
        self.assertNotEqual(
            path,
            normalise_path(  # '.htm' is not the same as '.html'
                "/Hello/world.htm;fizz=three;buzz=five?foo=Bar&Baz=quux2"
            ),
        )

        self.assertEqual("/", normalise_path("/"))  # '/' should stay '/'

        # Normalise some rubbish to make sure it doesn't crash
        normalise_path("This is not a URL")
        normalise_path("//////hello/world")
        normalise_path("!#@%$*")
        normalise_path("C:\\Program Files (x86)\\Some random program\\file.txt")

    def test_unicode_path_normalisation(self):
        normalise_path = models.Redirect.normalise_path

        self.assertEqual(
            "/here/tésting-ünicode",  # stays the same
            normalise_path("/here/tésting-ünicode"),
        )

        self.assertNotEqual(  # Doesn't remove unicode characters
            "/here/testing-unicode", normalise_path("/here/tésting-ünicode")
        )

    def test_route_path_normalisation(self):
        normalise_path = models.Redirect.normalise_page_route_path

        # "/" should be normalized to a blank string
        self.assertEqual("", normalise_path("/"))

        # leading slashes should always be added
        self.assertEqual("/test/", normalise_path("test/"))

        # but trailing slashes are not enforced either way
        # (that may cause regex matching for routes to fail)
        self.assertEqual(
            "/multiple/segment/test", normalise_path("/multiple/segment/test")
        )
        self.assertEqual(
            "/multiple/segment/test/", normalise_path("/multiple/segment/test/")
        )

    def test_basic_redirect(self):
        # Create a redirect
        redirect = models.Redirect(old_path="/redirectme", redirect_link="/redirectto")
        redirect.save()

        # Navigate to it
        response = self.client.get("/redirectme/")

        # Check that we were redirected
        self.assertRedirects(
            response, "/redirectto", status_code=301, fetch_redirect_response=False
        )

    def test_temporary_redirect(self):
        # Create a redirect
        redirect = models.Redirect(
            old_path="/redirectme", redirect_link="/redirectto", is_permanent=False
        )
        redirect.save()

        # Navigate to it
        response = self.client.get("/redirectme/")

        # Check that we were redirected temporarily
        self.assertRedirects(
            response, "/redirectto", status_code=302, fetch_redirect_response=False
        )

    def test_redirect_without_trailing_slash(self):
        # Create a redirect
        redirect = models.Redirect(old_path="/redirectme", redirect_link="/redirectto")
        redirect.save()

        # confirm that CommonMiddleware's append-slash behaviour is enabled
        self.assertTrue(settings.APPEND_SLASH)

        response = self.client.get("/redirectme")
        # Request should be picked up by RedirectMiddleware, not CommonMiddleware
        # (which would redirect to /redirectme/ instead).
        # Before Django 4.2, CommonMiddleware performed the 'add trailing slash' test
        # during the initial request processing, which took precedence over RedirectMiddleware
        # and caused a double redirect (/redirectme -> /redirectme/ -> /redirectto).
        self.assertRedirects(
            response, "/redirectto", status_code=301, fetch_redirect_response=False
        )

    def test_redirect_stripping_query_string(self):
        # Create a redirect which includes a query string
        redirect_with_query_string = models.Redirect(
            old_path="/redirectme?foo=Bar", redirect_link="/with-query-string-only"
        )
        redirect_with_query_string.save()

        # ... and another redirect without the query string
        redirect_without_query_string = models.Redirect(
            old_path="/redirectme", redirect_link="/without-query-string"
        )
        redirect_without_query_string.save()

        # Navigate to the redirect with the query string
        r_matching_qs = self.client.get("/redirectme/?foo=Bar")
        self.assertRedirects(
            r_matching_qs,
            "/with-query-string-only",
            status_code=301,
            fetch_redirect_response=False,
        )

        # Navigate to the redirect with a different query string
        # This should strip out the query string and match redirect_without_query_string
        r_no_qs = self.client.get("/redirectme/?utm_source=irrelevant")
        self.assertRedirects(
            r_no_qs,
            "/without-query-string",
            status_code=301,
            fetch_redirect_response=False,
        )

    def test_redirect_to_page(self):
        christmas_page = Page.objects.get(url_path="/home/events/christmas/")
        models.Redirect.objects.create(old_path="/xmas", redirect_page=christmas_page)

        response = self.client.get("/xmas/", HTTP_HOST="test.example.com")
        # Only one site defined, so redirect should return a local URL
        # (to keep things working if Site records haven't been configured correctly)
        self.assertRedirects(
            response,
            "/events/christmas/",
            status_code=301,
            fetch_redirect_response=False,
        )

    def test_redirect_to_specific_page_route(self):
        homepage = Page.objects.get(id=2)
        routable_page = homepage.add_child(
            instance=RoutablePageTest(
                title="Routable Page",
                live=True,
            )
        )
        contact_page = Page.objects.get(url_path="/home/contact-us/")

        # test redirect with a VALID route path
        models.Redirect.add_redirect(
            old_path="/old-path-one",
            redirect_to=routable_page,
            page_route_path="/render-method-test-custom-template/",
        )
        response = self.client.get("/old-path-one/", HTTP_HOST="test.example.com")
        self.assertRedirects(
            response,
            "/routable-page/render-method-test-custom-template/",
            status_code=301,
            fetch_redirect_response=False,
        )

        # test redirect with an INVALID route path
        models.Redirect.add_redirect(
            old_path="/old-path-two",
            redirect_to=routable_page,
            page_route_path="/invalid-route/",
        )
        response = self.client.get("/old-path-two/", HTTP_HOST="test.example.com")
        # we should still make it to the correct page
        self.assertRedirects(
            response, "/routable-page/", status_code=301, fetch_redirect_response=False
        )

        # test redirect with route path for a non-routable page
        models.Redirect.add_redirect(
            old_path="/old-path-three",
            redirect_to=contact_page,
            page_route_path="/route-to-nowhere/",
        )
        response = self.client.get("/old-path-three/", HTTP_HOST="test.example.com")
        # we should still make it to the correct page
        self.assertRedirects(
            response, "/contact-us/", status_code=301, fetch_redirect_response=False
        )

    def test_redirect_from_any_site(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        christmas_page = Page.objects.get(url_path="/home/events/christmas/")
        models.Redirect.objects.create(old_path="/xmas", redirect_page=christmas_page)

        # no site was specified on the redirect, so it should redirect regardless of hostname
        response = self.client.get("/xmas/", HTTP_HOST="localhost")
        self.assertRedirects(
            response,
            "http://localhost/events/christmas/",
            status_code=301,
            fetch_redirect_response=False,
        )

        response = self.client.get("/xmas/", HTTP_HOST="other.example.com")
        self.assertRedirects(
            response,
            "http://localhost/events/christmas/",
            status_code=301,
            fetch_redirect_response=False,
        )

    def test_redirect_from_specific_site(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        other_site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        christmas_page = Page.objects.get(url_path="/home/events/christmas/")
        models.Redirect.objects.create(
            old_path="/xmas", redirect_page=christmas_page, site=other_site
        )

        # redirect should only respond when site is other_site
        response = self.client.get("/xmas/", HTTP_HOST="other.example.com")
        self.assertRedirects(
            response,
            "http://localhost/events/christmas/",
            status_code=301,
            fetch_redirect_response=False,
        )

        response = self.client.get("/xmas/", HTTP_HOST="localhost")
        self.assertEqual(response.status_code, 404)

    def test_redirect_without_page_or_link_target(self):
        models.Redirect.objects.create(old_path="/xmas/", redirect_link="")

        # the redirect has been created but has no target and should 404
        response = self.client.get("/xmas/", HTTP_HOST="localhost")
        self.assertEqual(response.status_code, 404)

    def test_redirect_to_page_without_site(self):
        siteless_page = Page.objects.get(url_path="/does-not-exist/")
        models.Redirect.objects.create(old_path="/xmas", redirect_page=siteless_page)

        # the redirect's destination page doesn't have a site so the redirect should 404
        response = self.client.get("/xmas/", HTTP_HOST="localhost")
        self.assertEqual(response.status_code, 404)

    def test_duplicate_redirects_when_match_is_for_generic(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        # two redirects, one for any site, one for specific
        models.Redirect.objects.create(old_path="/xmas", redirect_link="/generic")
        models.Redirect.objects.create(
            site=site, old_path="/xmas", redirect_link="/site-specific"
        )

        response = self.client.get("/xmas/")
        # the redirect which matched was /generic
        self.assertRedirects(
            response, "/generic", status_code=301, fetch_redirect_response=False
        )

    def test_duplicate_redirects_with_query_string_when_match_is_for_generic(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        # two redirects, one for any site, one for specific, both with query string
        models.Redirect.objects.create(
            old_path="/xmas?foo=Bar", redirect_link="/generic-with-query-string"
        )
        models.Redirect.objects.create(
            site=site,
            old_path="/xmas?foo=Bar",
            redirect_link="/site-specific-with-query-string",
        )

        # and two redirects, one for any site, one for specific, without query strings
        models.Redirect.objects.create(old_path="/xmas", redirect_link="/generic")
        models.Redirect.objects.create(
            site=site, old_path="/xmas", redirect_link="/site-specific"
        )

        response = self.client.get("/xmas/?foo=Bar")
        # the redirect which matched was /generic-with-query-string
        self.assertRedirects(
            response,
            "/generic-with-query-string",
            status_code=301,
            fetch_redirect_response=False,
        )

        # now use a non-matching query string
        response = self.client.get("/xmas/?foo=Baz")
        # the redirect which matched was /generic
        self.assertRedirects(
            response, "/generic", status_code=301, fetch_redirect_response=False
        )

    def test_duplicate_redirects_when_match_is_for_specific(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        # two redirects, one for any site, one for specific
        models.Redirect.objects.create(old_path="/xmas", redirect_link="/generic")
        models.Redirect.objects.create(
            site=site, old_path="/xmas", redirect_link="/site-specific"
        )

        response = self.client.get("/xmas/", HTTP_HOST="other.example.com")
        # the redirect which matched was /site-specific
        self.assertRedirects(
            response, "/site-specific", status_code=301, fetch_redirect_response=False
        )

    def test_duplicate_redirects_with_query_string_when_match_is_for_specific_with_qs(
        self,
    ):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        # two redirects, one for any site, one for specific, both with query string
        models.Redirect.objects.create(
            old_path="/xmas?foo=Bar", redirect_link="/generic-with-query-string"
        )
        models.Redirect.objects.create(
            site=site,
            old_path="/xmas?foo=Bar",
            redirect_link="/site-specific-with-query-string",
        )

        # and two redirects, one for any site, one for specific, without query strings
        models.Redirect.objects.create(old_path="/xmas", redirect_link="/generic")
        models.Redirect.objects.create(
            site=site, old_path="/xmas", redirect_link="/site-specific"
        )

        response = self.client.get("/xmas/?foo=Bar", HTTP_HOST="other.example.com")
        # the redirect which matched was /site-specific-with-query-string
        self.assertRedirects(
            response,
            "/site-specific-with-query-string",
            status_code=301,
            fetch_redirect_response=False,
        )

        # now use a non-matching query string
        response = self.client.get("/xmas/?foo=Baz", HTTP_HOST="other.example.com")
        # the redirect which matched was /site-specific
        self.assertRedirects(
            response, "/site-specific", status_code=301, fetch_redirect_response=False
        )

    def test_duplicate_page_redirects_when_match_is_for_specific(self):
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )
        christmas_page = Page.objects.get(url_path="/home/events/christmas/")

        # two redirects, one for any site, one for specific
        models.Redirect.objects.create(old_path="/xmas", redirect_page=contact_page)
        models.Redirect.objects.create(
            site=site, old_path="/xmas", redirect_page=christmas_page
        )

        # request for specific site gets the christmas_page redirect, not accessible from other.example.com
        response = self.client.get("/xmas/", HTTP_HOST="other.example.com")
        self.assertRedirects(
            response,
            "http://localhost/events/christmas/",
            status_code=301,
            fetch_redirect_response=False,
        )

    def test_redirect_with_unicode_in_url(self):
        redirect = models.Redirect(
            old_path="/tésting-ünicode", redirect_link="/redirectto"
        )
        redirect.save()

        # Navigate to it
        response = self.client.get("/tésting-ünicode/")

        self.assertRedirects(
            response, "/redirectto", status_code=301, fetch_redirect_response=False
        )

    def test_redirect_with_encoded_url(self):
        redirect = models.Redirect(
            old_path="/t%C3%A9sting-%C3%BCnicode", redirect_link="/redirectto"
        )
        redirect.save()

        # Navigate to it
        response = self.client.get("/t%C3%A9sting-%C3%BCnicode/")

        self.assertRedirects(
            response, "/redirectto", status_code=301, fetch_redirect_response=False
        )

    def test_reject_null_characters(self):
        response = self.client.get("/test%00test/")
        self.assertEqual(response.status_code, 404)

        response = self.client.get("/test\0test/")
        self.assertEqual(response.status_code, 404)

        response = self.client.get("/test/?foo=%00bar")
        self.assertEqual(response.status_code, 404)

        response = self.client.get("/test/?foo=\0bar")
        self.assertEqual(response.status_code, 404)

    def test_add_redirect_with_url(self):
        add_redirect = models.Redirect.add_redirect

        old_path = "/old-path"
        redirect_to = "/new-path"

        # Create a redirect
        redirect = add_redirect(
            old_path=old_path, redirect_to=redirect_to, is_permanent=False
        )

        # Old path should match in redirect
        self.assertEqual(redirect.old_path, old_path)

        # Redirect page should match in redirect
        self.assertEqual(redirect.link, redirect_to)

        # should use is_permanent kwarg
        self.assertIs(redirect.is_permanent, False)

    def test_add_redirect_with_page(self):
        add_redirect = models.Redirect.add_redirect

        old_path = "/old-path"
        redirect_to = Page.objects.get(url_path="/home/events/christmas/")

        # Create a redirect
        redirect = add_redirect(old_path=old_path, redirect_to=redirect_to)

        # Old path should match in redirect
        self.assertEqual(redirect.old_path, old_path)

        # Redirect page should match in redirect
        self.assertEqual(redirect.link, redirect_to.url)

        # should default is_permanent to True
        self.assertIs(redirect.is_permanent, True)


@override_settings(
    CACHES={"default": {"BACKEND": "django.core.cache.backends.locmem.LocMemCache"}}
)
class TestRedirectsIndexView(AdminTemplateTestUtils, WagtailTestUtils, TestCase):
    @classmethod
    def setUpTestData(cls):
        cls.site = Site.objects.first()

    def setUp(self):
        self.login()

    def get(self, params={}):
        return self.client.get(reverse("wagtailredirects:index"), params)

    def test_simple(self):
        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "wagtailredirects/index.html")
        self.assertBreadcrumbsItemsRendered(
            [{"url": "", "label": "Redirects"}],
            response.content,
        )
        self.assertContains(response, "No redirects have been created")

    def test_search(self):
        models.Redirect.objects.create(
            old_path="/aaargh", redirect_link="http://torchbox.com/"
        )
        models.Redirect.objects.create(
            old_path="/torchbox", redirect_link="http://aaargh.com/"
        )
        models.Redirect.objects.create(
            old_path="/unrelated", redirect_link="http://unrelated.com/"
        )
        response = self.get({"q": "Aaargh"})
        self.assertEqual(len(response.context["redirects"]), 2)
        self.assertEqual(response.context["query_string"], "Aaargh")

    def test_search_results(self):
        models.Redirect.objects.create(
            old_path="/aaargh", redirect_link="http://torchbox.com/"
        )
        models.Redirect.objects.create(
            old_path="/torchbox", redirect_link="http://aaargh.com/"
        )
        models.Redirect.objects.create(
            old_path="/unrelated", redirect_link="http://unrelated.com/"
        )
        response = self.client.get(
            reverse("wagtailredirects:index_results"),
            {"q": "Aaargh"},
        )
        self.assertEqual(len(response.context["redirects"]), 2)
        self.assertEqual(response.context["query_string"], "Aaargh")

    def test_pagination(self):
        pages = ["0", "1", "-1", "9999", "Not a page"]
        for page in pages:
            response = self.get({"p": page})
            self.assertEqual(response.status_code, 200)

    def test_default_ordering(self):
        for i in range(0, 10):
            models.Redirect.objects.create(
                old_path="/redirect%d" % i, redirect_link="http://torchbox.com/"
            )

        models.Redirect.objects.create(
            old_path="/aaargh", redirect_link="http://torchbox.com/"
        )

        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.context["redirects"][0].old_path, "/aaargh")

    def test_custom_orderings(self):
        models.Redirect.objects.create(
            old_path="/test", redirect_link="http://wagtail.org/"
        )
        valid_orderings = {
            "old_path",
            "-old_path",
            "site__site_name",
            "-site__site_name",
            "is_permanent",
            "-is_permanent",
        }
        for ordering in valid_orderings:
            with self.subTest(ordering=ordering):
                response = self.get({"ordering": ordering})
                self.assertEqual(response.status_code, 200)
                soup = self.get_soup(response.content)
                links = {
                    reverse("wagtailredirects:index") + "?ordering=" + other
                    for other in valid_orderings
                    if not other.startswith("-")
                    and other != ordering
                    or other == f"-{ordering}"
                }
                for link in links:
                    self.assertIsNotNone(soup.find("a", {"href": link}))
                self.assertEqual(
                    response.context["object_list"].query.order_by,
                    (ordering,),
                )

    def test_filtering_by_type(self):
        temp_redirect = models.Redirect.add_redirect("/from", "/to", False)
        perm_redirect = models.Redirect.add_redirect("/cat", "/dog", True)

        response = self.get(params={"is_permanent": "True"})

        self.assertContains(response, perm_redirect.old_path)
        self.assertNotContains(response, temp_redirect.old_path)

    def test_filtering_by_site(self):
        site_redirect = models.Redirect.add_redirect("/cat", "/dog")
        site_redirect.site = self.site
        site_redirect.save()
        nosite_redirect = models.Redirect.add_redirect("/from", "/to")

        response = self.get(params={"site": self.site.pk})

        self.assertContains(response, site_redirect.old_path)
        self.assertNotContains(response, nosite_redirect.old_path)

    def test_csv_export(self):
        models.Redirect.add_redirect("/from", "/to", False)

        # Session, User, UserProfile, Redirects
        with self.assertNumQueries(4):
            response = self.get(params={"export": "csv"})

            csv_data = response.getvalue().decode().split("\n")

        self.assertEqual(response.status_code, 200)
        csv_header = csv_data[0]
        csv_entries = csv_data[1:]
        csv_entries = csv_entries[:-1]  # Drop empty last line

        self.assertEqual(csv_header, "From,To,Type,Site\r")
        self.assertEqual(len(csv_entries), 1)
        self.assertEqual(csv_entries[0], "/from,/to,temporary,\r")

    def test_xlsx_export(self):
        models.Redirect.add_redirect("/from", "/to", True)

        # Session, User, UserProfile, Redirects
        with self.assertNumQueries(4):
            response = self.get(params={"export": "xlsx"})
            workbook_data = response.getvalue()

        self.assertEqual(response.status_code, 200)

        worksheet = load_workbook(filename=BytesIO(workbook_data))["Sheet1"]
        cell_array = [[cell.value for cell in row] for row in worksheet.rows]

        self.assertEqual(cell_array[0], ["From", "To", "Type", "Site"])
        self.assertEqual(len(cell_array), 2)
        self.assertEqual(cell_array[1], ["/from", "/to", "permanent", None])

    def test_num_queries_in_export(self):
        page = Page.objects.get(id=2)
        for i in range(3):
            models.Redirect.add_redirect(f"/from{i}", "/to", False)
            models.Redirect.add_redirect(f"/from-site{i}", "/to", False, site=self.site)
            models.Redirect.add_redirect(f"/to-page{i}", page, False)

        response = self.get(params={"export": "csv"})
        csv_data = response.getvalue().decode().strip().split("\n")
        # Session, User, UserProfile, Redirects
        with self.assertNumQueries(4):
            response = self.get(params={"export": "csv"})
            csv_data = response.getvalue().decode().strip().split("\n")

        self.assertEqual(len(csv_data), 10)

    def test_redirect_page_filter_only_includes_relevant_pages(self):
        """
        The redirect_page filter should only include pages referenced by Redirect objects.
        """
        response = self.get()
        request = response.context["request"]
        qs = response.context["filters"].filters["redirect_page"].queryset(request)
        self.assertQuerySetEqual(qs, Page.objects.none())

        page = Page.objects.get(id=2)
        models.Redirect.add_redirect("/to-page", page, False)

        response = self.get()
        request = response.context["request"]
        qs = response.context["filters"].filters["redirect_page"].queryset(request)
        self.assertQuerySetEqual(qs, Page.objects.filter(pk=2))


@override_settings(
    WAGTAILFRONTENDCACHE={
        "dummy": {
            "BACKEND": "wagtail.contrib.frontend_cache.tests.MockBackend",
        },
    },
)
class TestRedirectsAddView(WagtailTestUtils, TestCase):
    fixtures = ["test.json"]

    def setUp(self):
        self.login()
        PURGED_URLS.clear()

    def get(self, params={}):
        return self.client.get(reverse("wagtailredirects:add"), params)

    def post(self, post_data={}):
        return self.client.post(reverse("wagtailredirects:add"), post_data)

    def test_simple(self):
        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "wagtailredirects/add.html")

    def test_add(self):
        response = self.post(
            {
                "old_path": "/test",
                "site": "",
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was created
        redirects = models.Redirect.objects.filter(old_path="/test")
        redirect = redirects.first()
        self.assertEqual(redirects.count(), 1)
        self.assertEqual(redirect.redirect_link, "http://www.test.com/")
        self.assertIsNone(redirect.site)

        # Check that the action log is marked as "created"
        log_entry = log_registry.get_logs_for_instance(redirect).first()
        self.assertEqual(log_entry.action, "wagtail.create")

        self.assertEqual(PURGED_URLS, {"http://localhost/test"})

    def test_add_with_site(self):
        localhost = Site.objects.get(hostname="localhost")
        response = self.post(
            {
                "old_path": "/test",
                "site": localhost.id,
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was created
        redirects = models.Redirect.objects.filter(old_path="/test")
        self.assertEqual(redirects.count(), 1)
        self.assertEqual(redirects.first().redirect_link, "http://www.test.com/")
        self.assertEqual(redirects.first().site, localhost)

        self.assertEqual(PURGED_URLS, {"http://localhost/test"})

    def test_add_validation_error(self):
        response = self.post(
            {
                "old_path": "",
                "site": "",
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should not redirect to index
        self.assertEqual(response.status_code, 200)
        self.assertEqual(PURGED_URLS, set())

    def test_cannot_add_duplicate_with_no_site(self):
        models.Redirect.objects.create(
            old_path="/test", site=None, redirect_link="http://elsewhere.com/"
        )
        response = self.post(
            {
                "old_path": "/test",
                "site": "",
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should not redirect to index
        self.assertEqual(response.status_code, 200)
        self.assertEqual(PURGED_URLS, set())

    def test_cannot_add_duplicate_on_same_site(self):
        localhost = Site.objects.get(hostname="localhost")
        models.Redirect.objects.create(
            old_path="/test", site=localhost, redirect_link="http://elsewhere.com/"
        )
        response = self.post(
            {
                "old_path": "/test",
                "site": localhost.pk,
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should not redirect to index
        self.assertEqual(response.status_code, 200)
        self.assertEqual(PURGED_URLS, set())

    def test_can_reuse_path_on_other_site(self):
        localhost = Site.objects.get(hostname="localhost")
        contact_page = Page.objects.get(url_path="/home/contact-us/")
        other_site = Site.objects.create(
            hostname="other.example.com", port=80, root_page=contact_page
        )

        models.Redirect.objects.create(
            old_path="/test", site=localhost, redirect_link="http://elsewhere.com/"
        )
        response = self.post(
            {
                "old_path": "/test",
                "site": other_site.pk,
                "is_permanent": "on",
                "redirect_link": "http://www.test.com/",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was created
        redirects = models.Redirect.objects.filter(redirect_link="http://www.test.com/")
        self.assertEqual(redirects.count(), 1)

        self.assertEqual(PURGED_URLS, redirects.get().old_links())

    def test_add_long_redirect(self):
        response = self.post(
            {
                "old_path": "/test",
                "site": "",
                "is_permanent": "on",
                "redirect_link": "https://www.google.com/search?q=this+is+a+very+long+url+because+it+has+a+huge+search+term+appended+to+the+end+of+it+even+though+someone+should+really+not+be+doing+something+so+crazy+without+first+seeing+a+psychiatrist",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was created
        redirects = models.Redirect.objects.filter(old_path="/test")
        self.assertEqual(redirects.count(), 1)
        self.assertEqual(
            redirects.first().redirect_link,
            "https://www.google.com/search?q=this+is+a+very+long+url+because+it+has+a+huge+search+term+appended+to+the+end+of+it+even+though+someone+should+really+not+be+doing+something+so+crazy+without+first+seeing+a+psychiatrist",
        )
        self.assertIsNone(redirects.first().site)

        self.assertEqual(PURGED_URLS, redirects.get().old_links())


@override_settings(
    WAGTAILFRONTENDCACHE={
        "dummy": {
            "BACKEND": "wagtail.contrib.frontend_cache.tests.MockBackend",
        },
    },
)
class TestRedirectsEditView(AdminTemplateTestUtils, WagtailTestUtils, TestCase):
    def setUp(self):
        # Create a redirect to edit
        self.redirect = models.Redirect(
            old_path="/test", redirect_link="http://www.test.com/"
        )
        self.redirect.save()

        # Login
        self.user = self.login()

        PURGED_URLS.clear()

    def get(self, params={}, redirect_id=None):
        return self.client.get(
            reverse("wagtailredirects:edit", args=(redirect_id or self.redirect.id,)),
            params,
        )

    def post(self, post_data={}, redirect_id=None):
        return self.client.post(
            reverse("wagtailredirects:edit", args=(redirect_id or self.redirect.id,)),
            post_data,
        )

    def test_simple(self):
        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "wagtailredirects/edit.html")
        self.assertBreadcrumbsItemsRendered(
            [
                {"url": reverse("wagtailredirects:index"), "label": "Redirects"},
                {"url": "", "label": "/test"},
            ],
            response.content,
        )

        url_finder = AdminURLFinder(self.user)
        expected_url = "/admin/redirects/%d/" % self.redirect.id
        self.assertEqual(url_finder.get_edit_url(self.redirect), expected_url)

    def test_nonexistent_redirect(self):
        self.assertEqual(self.get(redirect_id=100000).status_code, 404)

    def test_edit(self):
        response = self.post(
            {
                "old_path": "/test",
                "is_permanent": "on",
                "site": "",
                "redirect_link": "http://www.test.com/ive-been-edited",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was edited
        redirects = models.Redirect.objects.filter(old_path="/test")
        self.assertEqual(redirects.count(), 1)
        self.assertEqual(
            redirects.first().redirect_link, "http://www.test.com/ive-been-edited"
        )
        self.assertIsNone(redirects.first().site)

        self.assertEqual(PURGED_URLS, {"http://localhost/test"})

    def test_edit_with_site(self):
        localhost = Site.objects.get(hostname="localhost")

        response = self.post(
            {
                "old_path": "/test",
                "is_permanent": "on",
                "site": localhost.id,
                "redirect_link": "http://www.test.com/ive-been-edited",
            }
        )

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was edited
        redirects = models.Redirect.objects.filter(old_path="/test")
        self.assertEqual(redirects.count(), 1)
        self.assertEqual(
            redirects.first().redirect_link, "http://www.test.com/ive-been-edited"
        )
        self.assertEqual(redirects.first().site, localhost)
        self.assertEqual(PURGED_URLS, {"http://localhost/test"})

    def test_edit_validation_error(self):
        response = self.post(
            {
                "old_path": "",
                "is_permanent": "on",
                "site": "",
                "redirect_link": "http://www.test.com/ive-been-edited",
            }
        )

        # Should not redirect to index
        self.assertEqual(response.status_code, 200)
        self.assertEqual(PURGED_URLS, set())

    def test_edit_duplicate(self):
        models.Redirect.objects.create(
            old_path="/othertest", site=None, redirect_link="http://elsewhere.com/"
        )
        response = self.post(
            {
                "old_path": "/othertest",
                "is_permanent": "on",
                "site": "",
                "redirect_link": "http://www.test.com/ive-been-edited",
            }
        )

        # Should not redirect to index
        self.assertEqual(response.status_code, 200)
        self.assertEqual(PURGED_URLS, set())

    def test_get_with_no_permission(self, redirect_id=None):
        self.user.is_superuser = False
        self.user.save()
        # Only basic access_admin permission is given
        self.user.user_permissions.add(
            Permission.objects.get(
                content_type__app_label="wagtailadmin",
                codename="access_admin",
            )
        )

        response = self.get()
        self.assertEqual(response.status_code, 302)
        self.assertRedirects(response, reverse("wagtailadmin_home"))

    def test_get_with_edit_permission_only(self):
        self.user.is_superuser = False
        self.user.save()
        self.user.user_permissions.add(
            Permission.objects.get(
                content_type__app_label="wagtailadmin",
                codename="access_admin",
            ),
            Permission.objects.get(
                content_type__app_label="wagtailredirects",
                codename="change_redirect",
            ),
        )

        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "wagtailredirects/edit.html")


@override_settings(
    WAGTAILFRONTENDCACHE={
        "dummy": {
            "BACKEND": "wagtail.contrib.frontend_cache.tests.MockBackend",
        },
    },
)
class TestRedirectsDeleteView(WagtailTestUtils, TestCase):
    def setUp(self):
        # Create a redirect to edit
        self.redirect = models.Redirect(
            old_path="/test", redirect_link="http://www.test.com/"
        )
        self.redirect.save()

        # Login
        self.login()

        PURGED_URLS.clear()

    def get(self, params={}, redirect_id=None):
        return self.client.get(
            reverse("wagtailredirects:delete", args=(redirect_id or self.redirect.id,)),
            params,
        )

    def post(self, redirect_id=None):
        return self.client.post(
            reverse("wagtailredirects:delete", args=(redirect_id or self.redirect.id,))
        )

    def test_simple(self):
        response = self.get()
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "wagtailredirects/confirm_delete.html")

    def test_nonexistent_redirect(self):
        self.assertEqual(self.get(redirect_id=100000).status_code, 404)

    def test_delete(self):
        response = self.post()

        # Should redirect back to index
        self.assertRedirects(response, reverse("wagtailredirects:index"))

        # Check that the redirect was deleted
        redirects = models.Redirect.objects.filter(old_path="/test")
        self.assertEqual(redirects.count(), 0)

        self.assertEqual(PURGED_URLS, {"http://localhost/test"})
