"""网关集成测试（需 fastapi + httpx，链路全 mock）。"""
import pytest

pytest.importorskip("fastapi")
pytest.importorskip("httpx")

from fastapi.testclient import TestClient

from gateway.api import app


@pytest.fixture()
def client():
    return TestClient(app)


def test_health(client):
    resp = client.get("/health")
    assert resp.status_code == 200
    data = resp.json()
    assert data["status"] == "ok"
    assert "code" in data["domains"]


def test_chat(client):
    resp = client.post("/chat", json={"query": "用 Python 写一个快速排序函数"})
    assert resp.status_code == 200
    data = resp.json()
    assert data["response"]
    assert data["domain"] == "code"
    assert "route" in data


def test_chat_empty_query(client):
    resp = client.post("/chat", json={"query": ""})
    assert resp.status_code == 422


def test_metrics(client):
    resp = client.get("/metrics")
    assert resp.status_code == 200
    data = resp.json()
    assert "router" in data
    assert "cache" in data