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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from __future__ import annotations

import time
from unittest.mock import MagicMock, patch
from urllib.parse import parse_qs, urlencode

import jwt
import pytest

from airflow.api_fastapi.auth.managers.base_auth_manager import COOKIE_NAME_JWT_TOKEN
from airflow.models.revoked_token import RevokedToken

from tests_common.test_utils.config import conf_vars
from tests_common.test_utils.db import clear_db_revoked_tokens

AUTH_MANAGER_LOGIN_URL = "http://some_login_url"
AUTH_MANAGER_LOGOUT_URL = "http://some_logout_url"
SUBPATH = "/team-a/"

pytestmark = pytest.mark.db_test


class TestAuthEndpoint:
    @pytest.fixture(autouse=True)
    def setup(self, test_client) -> None:
        auth_manager_mock = MagicMock()
        auth_manager_mock.get_url_login.return_value = AUTH_MANAGER_LOGIN_URL
        auth_manager_mock.get_url_logout.return_value = AUTH_MANAGER_LOGOUT_URL
        test_client.app.state.auth_manager = auth_manager_mock


class TestGetLogin(TestAuthEndpoint):
    @pytest.mark.parametrize(
        "params",
        [
            {},
            {"next": None},
            {"next": "http://localhost:8080"},
            {"next": "http://localhost:8080", "other_param": "something_else"},
        ],
    )
    @patch("airflow.api_fastapi.core_api.routes.public.auth.is_safe_url", return_value=True)
    def test_should_respond_307(self, mock_is_safe_url, test_client, params):
        response = test_client.get("/auth/login", follow_redirects=False, params=params)

        assert response.status_code == 307
        assert (
            response.headers["location"]
            == f"{AUTH_MANAGER_LOGIN_URL}?{urlencode({'next': params.get('next')})}"
            if params.get("next")
            else AUTH_MANAGER_LOGIN_URL
        )

    @patch("airflow.api_fastapi.core_api.routes.public.auth.is_safe_url", return_value=True)
    def test_next_url_correctly_encoded(self, mock_is_safe_url, test_client):
        """Test that special characters in the next URL are correctly url encoded."""
        next_url = "http://localhost:8080/dags/my_dag/runs/manual__2026-03-02T12:45:13.113989+00:00/tasks/t"
        response = test_client.get("/auth/login", follow_redirects=False, params={"next": next_url})

        assert response.status_code == 307
        location = response.headers["location"]
        query_string = location.split("?", 1)[1]
        # Literals that have special meaning in query strings must be url encoded.
        assert "+" not in query_string
        assert ":" not in query_string
        assert "/" not in query_string
        # Decoding the query string must recover the original URL unchanged.
        assert parse_qs(query_string)["next"][0] == next_url

    @pytest.mark.parametrize(
        "params",
        [
            {"next": "http://fake_domain.com:8080"},
            {"next": "http://localhost:8080/../../up"},
        ],
    )
    @conf_vars({("api", "base_url"): "http://localhost:8080/prefix"})
    def test_should_respond_400(self, test_client, params):
        response = test_client.get("/auth/login", follow_redirects=False, params=params)

        assert response.status_code == 400


class TestLogout(TestAuthEndpoint):
    @pytest.fixture(autouse=True)
    def cleanup_revoked_tokens(self):
        clear_db_revoked_tokens()
        yield
        clear_db_revoked_tokens()

    @pytest.mark.parametrize(
        ("mock_logout_url", "expected_redirection", "delete_cookies"),
        [
            # logout_url is None, should redirect to the login page directly.
            (None, AUTH_MANAGER_LOGIN_URL, True),
            # logout_url is defined, should redirect to the logout_url.
            ("http://localhost/auth/some_logout_url", "http://localhost/auth/some_logout_url", False),
        ],
    )
    def test_should_respond_307(
        self,
        test_client,
        mock_logout_url,
        expected_redirection,
        delete_cookies,
    ):
        test_client.app.state.auth_manager.get_url_logout.return_value = mock_logout_url
        response = test_client.get("/auth/logout", follow_redirects=False)

        assert response.status_code == 307
        assert response.headers["location"] == expected_redirection

        if delete_cookies:
            cookies = response.headers.get_list("set-cookie")
            assert any(f"{COOKIE_NAME_JWT_TOKEN}=" in c for c in cookies)

    def test_logout_with_invalid_token_does_not_raise(self, test_client):
        """Test that logout with an invalid token does not raise."""
        test_client.app.state.auth_manager.get_url_logout.return_value = None

        test_client.cookies.set(COOKIE_NAME_JWT_TOKEN, "not-a-valid-jwt")

        response = test_client.get("/auth/logout", follow_redirects=False)

        assert response.status_code == 307

    @patch("airflow.api_fastapi.core_api.routes.public.auth.get_cookie_path", return_value=SUBPATH)
    def test_logout_cookie_uses_subpath(self, mock_cookie_path, test_client):
        """Cookies must use the subpath so they are scoped to the correct instance."""
        test_client.app.state.auth_manager.get_url_logout.return_value = None

        response = test_client.get("/auth/logout", follow_redirects=False)

        assert response.status_code == 307
        cookies = response.headers.get_list("set-cookie")
        token_cookie = next(c for c in cookies if f"{COOKIE_NAME_JWT_TOKEN}=" in c and f"Path={SUBPATH}" in c)
        assert f"Path={SUBPATH}" in token_cookie
        # Stale root-path cookie must also be cleared
        assert any(
            f"{COOKIE_NAME_JWT_TOKEN}=" in c and "Path=/" in c and f"Path={SUBPATH}" not in c for c in cookies
        )


class TestLogoutTokenRevocation:
    """Tests for token revocation on logout, using real DB queries without mocks."""

    pytestmark = [pytest.mark.db_test]

    @pytest.fixture(autouse=True)
    def cleanup_revoked_tokens(self):
        clear_db_revoked_tokens()
        yield
        clear_db_revoked_tokens()

    @pytest.fixture
    def logout_client(self):
        """A test client without the is_revoked mock so revocation tests hit the real DB."""
        from fastapi.testclient import TestClient

        from airflow.api_fastapi.app import create_app

        with conf_vars(
            {
                (
                    "core",
                    "auth_manager",
                ): "airflow.api_fastapi.auth.managers.simple.simple_auth_manager.SimpleAuthManager"
            }
        ):
            app = create_app()
            yield TestClient(app, base_url="http://testserver/api/v2")

    def test_logout_revokes_token(self, logout_client):
        """Test that logout revokes the JWT token and persists it in the database."""
        now = int(time.time())
        auth_manager = logout_client.app.state.auth_manager
        signer = auth_manager._get_token_signer()
        token_payload = {
            "sub": "admin",
            "jti": "test-jti-123",
            "exp": now + 3600,
            "iat": now,
            "nbf": now,
            "aud": "apache-airflow",
            # Include the signer's configured issuer so the validator (which
            # reads `[api_auth] jwt_issuer` from the same config) does not
            # reject the synthetic token for missing iss.
            "iss": signer.issuer,
        }
        token_str = jwt.encode(token_payload, signer._secret_key, algorithm=signer.algorithm)

        logout_client.cookies.set(COOKIE_NAME_JWT_TOKEN, token_str)
        with patch.object(auth_manager, "get_url_logout", return_value=None):
            response = logout_client.get("/auth/logout", follow_redirects=False)

        assert response.status_code == 307
        assert RevokedToken.is_revoked("test-jti-123") is True

    def test_logout_without_cookie_does_not_revoke(self, logout_client):
        """Test that logout without a cookie does not attempt to revoke."""
        auth_manager = logout_client.app.state.auth_manager
        with patch.object(auth_manager, "get_url_logout", return_value=None):
            response = logout_client.get("/auth/logout", follow_redirects=False)

        assert response.status_code == 307
        assert RevokedToken.is_revoked("nonexistent-jti") is False
