from __future__ import annotations

import unittest
from types import SimpleNamespace
from unittest.mock import patch

from models import AssistantConfig
from services.workflow_router import WorkflowLLMRouter


class WorkflowLLMRouterTest(unittest.IsolatedAsyncioTestCase):
    async def test_uses_required_tool_choice_without_developer_messages(self):
        requests = []

        class FakeCompletions:
            async def create(self, **kwargs):
                requests.append(kwargs)
                return SimpleNamespace(
                    choices=[
                        SimpleNamespace(
                            message=SimpleNamespace(
                                tool_calls=[
                                    SimpleNamespace(
                                        function=SimpleNamespace(name="goto_age", arguments="{}")
                                    )
                                ]
                            )
                        )
                    ]
                )

        class FakeClient:
            def __init__(self, **_kwargs):
                self.chat = SimpleNamespace(completions=FakeCompletions())
                self.closed = False

            async def close(self):
                self.closed = True

        cfg = AssistantConfig(
            type="workflow",
            model="deepseek-chat",
            llm_api_key="secret",
            llm_base_url="https://llm.test/v1",
        )
        router = WorkflowLLMRouter(cfg)
        edges = [
            {
                "id": "age",
                "data": {"condition": "用户已经回答姓名", "priority": 10},
            }
        ]

        with patch("services.workflow_router.AsyncOpenAI", FakeClient):
            selected = await router.select_edge(
                node_name="询问姓名",
                node_prompt="询问用户姓名",
                edges=edges,
                history=[{"role": "user", "message": "我叫李白"}],
                variables={"customer_type": "new"},
                edge_name=lambda _edge: "goto_age",
                edge_description=lambda _edge: "用户已经回答姓名",
            )

        self.assertEqual(selected, "goto_age")
        self.assertEqual(requests[0]["tool_choice"], "required")
        self.assertEqual(
            [message["role"] for message in requests[0]["messages"]],
            ["system", "user"],
        )
        self.assertNotIn("developer", str(requests[0]["messages"]))


if __name__ == "__main__":
    unittest.main()