import time
from unittest.mock import patch

from bs4 import BeautifulSoup
from django.http import HttpResponse

from zerver.lib.realm_icon import get_realm_icon_url
from zerver.lib.request import RequestNotes
from zerver.lib.test_classes import ZulipTestCase
from zerver.lib.test_helpers import HostRequestMock
from zerver.lib.utils import assert_is_not_none
from zerver.middleware import LogRequests, is_slow_query, write_log_line
from zerver.models.realms import get_realm
from zilencer.models import RemoteZulipServer


class SlowQueryTest(ZulipTestCase):
    SLOW_QUERY_TIME = 10
    log_data = {
        "extra": "[transport=websocket]",
        "time_started": 0,
        "markdown_requests_start": 0,
        "markdown_time_start": 0,
        "remote_cache_time_start": 0,
        "remote_cache_requests_start": 0,
    }

    def test_is_slow_query(self) -> None:
        self.assertFalse(is_slow_query(1.1, "/some/random/url"))
        self.assertTrue(is_slow_query(2, "/some/random/url"))
        self.assertTrue(is_slow_query(5.1, "/activity"))
        self.assertFalse(is_slow_query(2, "/activity"))
        self.assertFalse(is_slow_query(2, "/realm_activity/whatever"))
        self.assertFalse(is_slow_query(2, "/user_activity/whatever"))

    def test_slow_query_log(self) -> None:
        self.log_data["time_started"] = time.time() - self.SLOW_QUERY_TIME
        with (
            self.assertLogs("zulip.slow_queries", level="INFO") as slow_query_logger,
            self.assertLogs("zulip.requests", level="INFO") as middleware_normal_logger,
        ):
            write_log_line(
                self.log_data,
                path="/some/endpoint/",
                method="GET",
                remote_ip="123.456.789.012",
                requester_for_logs="unknown",
                client_name="?",
            )
            self.assert_length(middleware_normal_logger.output, 1)
            self.assert_length(slow_query_logger.output, 1)

            self.assertRegex(
                slow_query_logger.output[0],
                r"123\.456\.789\.012 GET     200 10\.\ds .* \(unknown via \?\)",
            )


class OpenGraphTest(ZulipTestCase):
    def check_title_and_description(
        self,
        path: str,
        title: str,
        in_description: list[str],
        not_in_description: list[str],
        status_code: int = 200,
    ) -> None:
        response = self.client_get(path)
        self.assertEqual(response.status_code, status_code)
        bs = BeautifulSoup(response.content, features="lxml")
        open_graph_title = assert_is_not_none(bs.select_one('meta[property="og:title"]')).get(
            "content"
        )
        self.assertEqual(open_graph_title, title)

        open_graph_description = assert_is_not_none(
            bs.select_one('meta[property="og:description"]')
        ).get("content")
        assert isinstance(open_graph_description, str)
        for substring in in_description:
            self.assertIn(substring, open_graph_description)
        for substring in not_in_description:
            self.assertNotIn(substring, open_graph_description)

    def test_index_pages(self) -> None:
        self.check_title_and_description(
            "/api/",
            "Zulip API documentation",
            [
                (
                    "Zulip's APIs allow you to integrate other services with Zulip. This "
                    "guide should help you find the API you need:"
                )
            ],
            # This is added to maintain coverage for the not_in_description
            # block since we might want to keep using that for future tests.
            ["No such article."],
        )

    def test_nonexistent_page(self) -> None:
        self.check_title_and_description(
            "/api/not-a-real-page",
            # Probably we should make this "Zulip help center"
            "No such article. | Zulip API documentation",
            [
                "No such article.",
                "Your feedback helps us make Zulip better for everyone! Please contact us",
            ],
            [],
            # Test that our open graph logic doesn't throw a 500
            404,
        )

    def test_login_page_simple_description(self) -> None:
        name = "Zulip Dev"
        description = (
            "The Zulip development environment default organization. It's great for testing!"
        )

        self.check_title_and_description("/login/", name, [description], [])

    def test_login_page_markdown_description(self) -> None:
        realm = get_realm("zulip")
        description = (
            "Welcome to **Clojurians Zulip** - the place where the Clojure community meets.\n\n"
            "Before you signup/login:\n\n"
            "* note-1\n"
            "* note-2\n"
            "* note-3\n\n"
            "Enjoy!"
        )
        realm.description = description
        realm.save(update_fields=["description"])

        self.check_title_and_description(
            "/login/",
            "Zulip Dev",
            [
                "Welcome to Clojurians Zulip - the place where the Clojure community meets",
                "* note-1 * note-2 * note-3 | Enjoy!",
            ],
            [],
        )

    def test_login_page_realm_icon(self) -> None:
        realm = get_realm("zulip")
        realm.icon_source = "U"
        realm.save(update_fields=["icon_source"])
        realm_icon = get_realm_icon_url(realm)

        response = self.client_get("/login/")
        self.assertEqual(response.status_code, 200)

        bs = BeautifulSoup(response.content, features="lxml")
        open_graph_image = assert_is_not_none(bs.select_one('meta[property="og:image"]')).get(
            "content"
        )
        self.assertEqual(open_graph_image, f"{realm.url}{realm_icon}")

    def test_login_page_realm_icon_absolute_url(self) -> None:
        realm = get_realm("zulip")
        realm.icon_source = "U"
        realm.save(update_fields=["icon_source"])
        icon_url = f"https://foo.s3.amazonaws.com/{realm.id}/realm/icon.png?version={1}"
        with patch(
            "zerver.lib.realm_icon.upload_backend.get_realm_icon_url", return_value=icon_url
        ):
            response = self.client_get("/login/")
        self.assertEqual(response.status_code, 200)

        bs = BeautifulSoup(response.content, features="lxml")
        open_graph_image = assert_is_not_none(bs.select_one('meta[property="og:image"]')).get(
            "content"
        )
        self.assertEqual(open_graph_image, icon_url)

    def test_no_realm_api_page_og_url(self) -> None:
        response = self.client_get("/api/", subdomain="")
        self.assertEqual(response.status_code, 200)

        bs = BeautifulSoup(response.content, features="lxml")
        open_graph_url = assert_is_not_none(bs.select_one('meta[property="og:url"]')).get("content")

        assert isinstance(open_graph_url, str)
        self.assertTrue(open_graph_url.endswith("/api/"))


class LogRequestsTest(ZulipTestCase):
    meta_data = {"REMOTE_ADDR": "127.0.0.1"}

    def test_requester_for_logs_as_user(self) -> None:
        hamlet = self.example_user("hamlet")
        request = HostRequestMock(user_profile=hamlet, meta_data=self.meta_data)
        RequestNotes.get_notes(request).log_data = None

        with self.assertLogs("zulip.requests", level="INFO") as m:
            LogRequests(lambda _: HttpResponse())(request)
            self.assertIn(hamlet.format_requester_for_logs(), m.output[0])

    def test_requester_for_logs_as_remote_server(self) -> None:
        remote_server = RemoteZulipServer()
        request = HostRequestMock(remote_server=remote_server, meta_data=self.meta_data)
        RequestNotes.get_notes(request).log_data = None

        with self.assertLogs("zulip.requests", level="INFO") as m:
            LogRequests(lambda _: HttpResponse())(request)
            self.assertIn(remote_server.format_requester_for_logs(), m.output[0])

    def test_requester_for_logs_unauthenticated(self) -> None:
        request = HostRequestMock(meta_data=self.meta_data)
        RequestNotes.get_notes(request).log_data = None

        expected_requester = "unauth@root"
        with self.assertLogs("zulip.requests", level="INFO") as m:
            LogRequests(lambda _: HttpResponse())(request)
            self.assertIn(expected_requester, m.output[0])
