"""基础测试模块，测试核心业务逻辑和 API 端点。"""

import pytest
from httpx import AsyncClient, ASGITransport
from app.main import app
from app.services import get_greeting, get_system_info


class TestServices:
    """服务层单元测试。"""

    def test_get_greeting_default(self):
        """测试无参数时返回默认问候语。"""
        result = get_greeting()
        assert result == "Hello, World!"

    def test_get_greeting_with_name(self):
        """测试传入名字时返回个性化问候语。"""
        result = get_greeting("FastAPI")
        assert result == "Hello, FastAPI!"

    def test_get_system_info_structure(self):
        """测试系统信息返回正确的字段结构。"""
        info = get_system_info()
        assert "message" in info
        assert "timestamp" in info
        assert "service" in info
        assert "version" in info
        assert info["message"] == "Hello, World!"
        assert info["service"] == "Simple Hello API"


@pytest.mark.asyncio
class TestAPI:
    """API 端点集成测试。"""

    async def test_root_endpoint(self):
        """测试根路径返回正确的系统信息。"""
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/")
            assert response.status_code == 200
            data = response.json()
            assert data["message"] == "Hello, World!"
            assert "timestamp" in data

    async def test_hello_endpoint(self):
        """测试 /hello/{name} 返回正确的问候语。"""
        transport = ASGITransport(app=app)
        async with AsyncClient(transport=transport, base_url="http://test") as client:
            response = await client.get("/hello/Python")
            assert response.status_code == 200
            data = response.json()
            assert data["message"] == "Hello, Python!"