import subprocess
from typing import Callable, ContextManager, Dict, List, Tuple
from unittest import mock

import orjson
from django.test import override_settings

from zerver.lib.test_classes import ZulipTestCase
from zerver.lib.test_helpers import mock_queue_publish
from zerver.lib.utils import statsd


def fix_params(raw_params: Dict[str, object]) -> Dict[str, str]:
    # A few of our few legacy endpoints need their
    # individual parameters serialized as JSON.
    return {k: orjson.dumps(v).decode() for k, v in raw_params.items()}


class StatsMock:
    def __init__(self, settings: Callable[..., ContextManager[None]]) -> None:
        self.settings = settings
        self.real_impl = statsd
        self.func_calls: List[Tuple[str, Tuple[object, ...]]] = []

    def __getattr__(self, name: str) -> Callable[..., None]:
        def f(*args: object) -> None:
            with self.settings(STATSD_HOST=""):
                getattr(self.real_impl, name)(*args)
            self.func_calls.append((name, args))

        return f


class TestReport(ZulipTestCase):
    def test_send_time(self) -> None:
        self.login("hamlet")

        params = dict(
            time=5,
            received=6,
            displayed=7,
            locally_echoed="true",
            rendered_content_disparity="true",
        )

        stats_mock = StatsMock(self.settings)
        with mock.patch("zerver.views.report.statsd", wraps=stats_mock):
            result = self.client_post("/json/report/send_times", params)
        self.assert_json_success(result)

        expected_calls = [
            ("timing", ("endtoend.send_time.zulip", 5)),
            ("timing", ("endtoend.receive_time.zulip", 6)),
            ("timing", ("endtoend.displayed_time.zulip", 7)),
            ("incr", ("locally_echoed",)),
            ("incr", ("render_disparity",)),
        ]
        self.assertEqual(stats_mock.func_calls, expected_calls)

    def test_narrow_time(self) -> None:
        self.login("hamlet")

        params = dict(
            initial_core=5,
            initial_free=6,
            network=7,
        )

        stats_mock = StatsMock(self.settings)
        with mock.patch("zerver.views.report.statsd", wraps=stats_mock):
            result = self.client_post("/json/report/narrow_times", params)
        self.assert_json_success(result)

        expected_calls = [
            ("timing", ("narrow.initial_core.zulip", 5)),
            ("timing", ("narrow.initial_free.zulip", 6)),
            ("timing", ("narrow.network.zulip", 7)),
        ]
        self.assertEqual(stats_mock.func_calls, expected_calls)

    def test_anonymous_user_narrow_time(self) -> None:
        params = dict(
            initial_core=5,
            initial_free=6,
            network=7,
        )

        stats_mock = StatsMock(self.settings)
        with mock.patch("zerver.views.report.statsd", wraps=stats_mock):
            result = self.client_post("/json/report/narrow_times", params)
        self.assert_json_success(result)

        expected_calls = [
            ("timing", ("narrow.initial_core.zulip", 5)),
            ("timing", ("narrow.initial_free.zulip", 6)),
            ("timing", ("narrow.network.zulip", 7)),
        ]
        self.assertEqual(stats_mock.func_calls, expected_calls)

    def test_unnarrow_time(self) -> None:
        self.login("hamlet")

        params = dict(
            initial_core=5,
            initial_free=6,
        )

        stats_mock = StatsMock(self.settings)
        with mock.patch("zerver.views.report.statsd", wraps=stats_mock):
            result = self.client_post("/json/report/unnarrow_times", params)
        self.assert_json_success(result)

        expected_calls = [
            ("timing", ("unnarrow.initial_core.zulip", 5)),
            ("timing", ("unnarrow.initial_free.zulip", 6)),
        ]
        self.assertEqual(stats_mock.func_calls, expected_calls)

    def test_anonymous_user_unnarrow_time(self) -> None:
        params = dict(
            initial_core=5,
            initial_free=6,
        )

        stats_mock = StatsMock(self.settings)
        with mock.patch("zerver.views.report.statsd", wraps=stats_mock):
            result = self.client_post("/json/report/unnarrow_times", params)
        self.assert_json_success(result)

        expected_calls = [
            ("timing", ("unnarrow.initial_core.zulip", 5)),
            ("timing", ("unnarrow.initial_free.zulip", 6)),
        ]
        self.assertEqual(stats_mock.func_calls, expected_calls)

    @override_settings(BROWSER_ERROR_REPORTING=True)
    def test_report_error(self) -> None:
        user = self.example_user("hamlet")
        self.login_user(user)
        self.make_stream("errors", user.realm)

        params = fix_params(
            dict(
                message="hello",
                stacktrace="trace",
                ui_message=True,
                user_agent="agent",
                href="href",
                log="log",
                more_info=dict(foo="bar", draft_content="**draft**"),
            )
        )

        subprocess_mock = mock.patch(
            "zerver.views.report.subprocess.check_output",
            side_effect=subprocess.CalledProcessError(1, []),
        )
        with mock_queue_publish("zerver.views.report.queue_json_publish") as m, subprocess_mock:
            result = self.client_post("/json/report/error", params)
        self.assert_json_success(result)

        report = m.call_args[0][1]["report"]
        for k in set(params) - {"ui_message", "more_info"}:
            self.assertEqual(report[k], params[k])

        self.assertEqual(report["more_info"], dict(foo="bar", draft_content="'**xxxxx**'"))
        self.assertEqual(report["user_email"], user.delivery_email)

        # Teset with no more_info
        del params["more_info"]
        with mock_queue_publish("zerver.views.report.queue_json_publish") as m, subprocess_mock:
            result = self.client_post("/json/report/error", params)
        self.assert_json_success(result)

        with self.settings(BROWSER_ERROR_REPORTING=False):
            result = self.client_post("/json/report/error", params)
        self.assert_json_success(result)

        # If js_source_map is present, then the stack trace should be annotated.
        # DEVELOPMENT=False and TEST_SUITE=False are necessary to ensure that
        # js_source_map actually gets instantiated.
        with self.settings(DEVELOPMENT=False, TEST_SUITE=False), mock.patch(
            "zerver.lib.unminify.SourceMap.annotate_stacktrace"
        ) as annotate, self.assertLogs(level="INFO") as info_logs:
            result = self.client_post("/json/report/error", params)
        self.assert_json_success(result)
        # fix_params (see above) adds quotes when JSON encoding.
        annotate.assert_called_once_with('"trace"')
        self.assertEqual(
            info_logs.output, ["INFO:root:Processing traceback with type browser for None"]
        )

        # Now test without authentication.
        self.logout()
        with self.settings(DEVELOPMENT=False, TEST_SUITE=False), mock.patch(
            "zerver.lib.unminify.SourceMap.annotate_stacktrace"
        ) as annotate, self.assertLogs(level="INFO") as info_logs:
            result = self.client_post("/json/report/error", params)
        self.assert_json_success(result)
        self.assertEqual(
            info_logs.output, ["INFO:root:Processing traceback with type browser for None"]
        )

    def test_report_csp_violations(self) -> None:
        fixture_data = self.fixture_data("csp_report.json")
        with self.assertLogs(level="WARNING") as warn_logs:
            result = self.client_post(
                "/report/csp_violations", fixture_data, content_type="application/json"
            )
        self.assert_json_success(result)
        self.assertEqual(
            warn_logs.output,
            [
                "WARNING:root:CSP Violation in Document(''). Blocked URI(''), Original Policy(''), Violated Directive(''), Effective Directive(''), Disposition(''), Referrer(''), Status Code(''), Script Sample('')"
            ],
        )