import ssl
from unittest.mock import AsyncMock

import pytest
from fastapi.security import HTTPAuthorizationCredentials
from gpustack.api.auth import get_current_user, worker_auth
from gpustack.api.exceptions import UnauthorizedException
from gpustack.routes.auth import oidc_callback


class DummyWorkerConfig:
    token = "registration-token"

    def get_server_url(self):
        return "http://example.com"


@pytest.mark.asyncio
async def test_get_current_user_accepts_x_api_key(monkeypatch):
    session = object()
    request = type("Request", (), {})()
    request.state = type("State", (), {})()
    request.headers = {}
    request.client = type("Client", (), {"host": "10.0.0.1"})()
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.server_config = type(
        "Config", (), {"gateway_mode": None, "force_auth_localhost": True}
    )()

    expected_user = type("User", (), {"is_active": True})()
    expected_key = object()

    auth_mock = AsyncMock(return_value=(expected_user, expected_key))
    monkeypatch.setattr("gpustack.api.auth.get_user_from_api_token", auth_mock)

    user = await get_current_user(
        request=request,
        session=session,
        x_api_key="sk_test_value",
    )

    auth_mock.assert_awaited_once_with(session, "sk_test_value")
    assert user is expected_user
    assert request.state.user is expected_user
    assert request.state.api_key is expected_key


@pytest.mark.asyncio
async def test_worker_auth_accepts_x_api_key():
    request = type("Request", (), {})()
    request.headers = {"X-Higress-Llm-Model": "claude-sonnet"}
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.token = "worker-token"
    request.app.state.config = DummyWorkerConfig()
    request.app.state.http_client_no_proxy = object()

    assert await worker_auth(request=request, x_api_key="worker-token") is None


@pytest.mark.asyncio
async def test_worker_auth_rejects_missing_credentials():
    request = type("Request", (), {})()
    request.headers = {"X-Higress-Llm-Model": "claude-sonnet"}
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.token = "worker-token"
    request.app.state.config = DummyWorkerConfig()
    request.app.state.http_client_no_proxy = object()

    with pytest.raises(UnauthorizedException):
        await worker_auth(request=request)


@pytest.mark.asyncio
async def test_get_current_user_falls_back_to_x_api_key_when_bearer_empty(
    monkeypatch,
):
    session = object()
    request = type("Request", (), {})()
    request.state = type("State", (), {})()
    request.headers = {}
    request.client = type("Client", (), {"host": "10.0.0.1"})()
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.server_config = type(
        "Config", (), {"gateway_mode": None, "force_auth_localhost": True}
    )()

    expected_user = type("User", (), {"is_active": True})()
    expected_key = object()

    auth_mock = AsyncMock(return_value=(expected_user, expected_key))
    monkeypatch.setattr("gpustack.api.auth.get_user_from_api_token", auth_mock)

    user = await get_current_user(
        request=request,
        session=session,
        bearer_token=HTTPAuthorizationCredentials(scheme="Bearer", credentials=""),
        x_api_key="sk_test_value",
    )

    auth_mock.assert_awaited_once_with(session, "sk_test_value")
    assert user is expected_user


@pytest.mark.asyncio
async def test_worker_auth_falls_back_to_x_api_key_when_bearer_empty():
    request = type("Request", (), {})()
    request.headers = {"X-Higress-Llm-Model": "claude-sonnet"}
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.token = "worker-token"
    request.app.state.config = DummyWorkerConfig()
    request.app.state.http_client_no_proxy = object()

    assert (
        await worker_auth(
            request=request,
            bearer_token=HTTPAuthorizationCredentials(scheme="Bearer", credentials=""),
            x_api_key="worker-token",
        )
        is None
    )


@pytest.mark.asyncio
async def test_oidc_callback_uses_system_trust_store(monkeypatch):
    captured = {}

    class FakeAsyncClient:
        def __init__(self, **kwargs):
            captured.update(kwargs)

        async def __aenter__(self):
            return self

        async def __aexit__(self, exc_type, exc, tb):
            return None

        async def request(self, method, url, data=None):
            return type(
                "Resp",
                (),
                {
                    "status_code": 200,
                    "text": '{"access_token":"token","id_token":"id"}',
                },
            )()

    request = type("Request", (), {})()
    request.app = type("App", (), {})()
    request.app.state = type("State", (), {})()
    request.app.state.server_config = type(
        "Config",
        (),
        {
            "oidc_client_id": "client-id",
            "oidc_client_secret": "client-secret",
            "oidc_redirect_uri": "https://gpustack.example.com/auth/oidc/callback",
            "openid_configuration": {
                "token_endpoint": "https://issuer.example.com/token"
            },
            "external_auth_name": None,
            "external_auth_full_name": None,
            "external_auth_avatar_url": None,
            "external_auth_default_inactive": False,
        },
    )()
    request.app.state.jwt_manager = type(
        "JWTManager", (), {"create_jwt_token": lambda self, username: "jwt-token"}
    )()
    request.query_params = {"code": "auth-code"}

    monkeypatch.setattr("gpustack.routes.auth.httpx.AsyncClient", FakeAsyncClient)
    monkeypatch.setattr("gpustack.routes.auth.use_proxy_env_for_url", lambda url: False)
    monkeypatch.setattr(
        "gpustack.routes.auth.get_oidc_user_data",
        AsyncMock(return_value={"email": "user@example.com", "name": "Test User"}),
    )
    monkeypatch.setattr(
        "gpustack.routes.auth.User.first_by_field", AsyncMock(return_value=object())
    )

    response = await oidc_callback(request=request, session=object())

    assert response.status_code in (302, 307)
    assert captured["trust_env"] is False
    assert captured["timeout"] is not None
    assert isinstance(captured["verify"], ssl.SSLContext)