import asyncio
from unittest.mock import patch

from django.contrib.auth.models import AnonymousUser
from django.test import TestCase

from engine.vibes_auth.models import User
from engine.vibes_auth.messaging import auth as auth_module


class MessagingAuthTests(TestCase):
    def test_extract_jwt_from_subprotocols_cases(self):
        fn = auth_module._extract_jwt_from_subprotocols
        self.assertIsNone(fn(None))
        self.assertIsNone(fn([]))
        self.assertEqual(fn(["bearer", "abc.token"]), "abc.token")
        self.assertEqual(fn(["Bearer", "abc"]), "abc")
        self.assertEqual(fn(["single-token"]), "single-token")
        self.assertIsNone(fn([""]))
        self.assertIsNone(fn(["Bearer", ""]))

    def test_jwt_middleware_sets_anonymous_without_token(self):
        captured = {}

        async def inner_app(scope_dict, _receive, _send):
            captured["is_anon"] = isinstance(scope_dict["user"], AnonymousUser) or scope_dict["user"].is_anonymous

        middleware = auth_module.JWTAuthMiddleware(inner_app)

        scope = {"type": "websocket", "subprotocols": []}

        async def dummy_receive():
            return {"type": "websocket.disconnect"}

        async def dummy_send(_message):
            return None

        asyncio.run(middleware(scope, dummy_receive, dummy_send))
        self.assertTrue(captured.get("is_anon"))

    def test_jwt_middleware_sets_user_with_valid_token(self):
        user = User.objects.create_user(email="user@example.com", password="Str0ngPass!word")

        class FakeAuth:
            def authenticate(self, _request):
                return user, "token"

        captured = {}

        async def inner_app(scope_dict, _receive, _send):
            captured["user_id"] = getattr(scope_dict["user"], "pk", None)

        middleware = auth_module.JWTAuthMiddleware(inner_app)
        scope = {"type": "websocket", "subprotocols": ["bearer", "abc.def"]}

        async def dummy_receive():
            return {"type": "websocket.disconnect"}

        async def dummy_send(_message):
            return None

        with patch.object(auth_module, "JWTAuthentication", FakeAuth):
            asyncio.run(middleware(scope, dummy_receive, dummy_send))
        self.assertEqual(captured.get("user_id"), user.pk)

    def test_jwt_middleware_handles_bad_token_gracefully(self):
        class FakeAuth:
            def authenticate(self, _request):
                raise Exception("bad token")

        captured = {}

        async def inner_app(scope_dict, _receive, _send):
            captured["is_anon"] = isinstance(scope_dict["user"], AnonymousUser) or scope_dict["user"].is_anonymous

        middleware = auth_module.JWTAuthMiddleware(inner_app)
        scope = {"type": "websocket", "subprotocols": ["bearer", "bad.token"]}

        async def dummy_receive():
            return {"type": "websocket.disconnect"}

        async def dummy_send(_message):
            return None

        with patch.object(auth_module, "JWTAuthentication", FakeAuth):
            asyncio.run(middleware(scope, dummy_receive, dummy_send))
        self.assertTrue(captured.get("is_anon"))