"""mcp_server 测试：参数解析 + 非回环强制 token + ASGI 鉴权中间件。"""
import asyncio

import pytest

from ppclock.mcp_server import (TOKEN_ENV, TokenAuthMiddleware,
                                parse_args)


class TestParseArgs:
    def test_defaults(self):
        a = parse_args([])
        assert a.transport == "stdio"
        assert a.host == "127.0.0.1"
        assert a.port == 8972
        assert a.mac is None
        assert a.connect_timeout == 90.0
        assert a.idle_timeout == 300.0

    def test_http_flags(self):
        a = parse_args(["--transport", "http", "--host", "0.0.0.0",
                        "--port", "9000", "--mac", "AA:BB:CC:DD:EE:FF",
                        "--connect-timeout", "120", "--idle-timeout", "60"])
        assert a.transport == "http" and a.host == "0.0.0.0"
        assert a.port == 9000 and a.mac == "AA:BB:CC:DD:EE:FF"
        assert a.connect_timeout == 120.0 and a.idle_timeout == 60.0


def run_middleware(token_set, auth_header):
    """驱动 TokenAuthMiddleware，返回 (status, app_called)。"""
    captured = {}

    async def app(scope, receive, send):
        captured["called"] = True
        await send({"type": "http.response.start", "status": 200, "headers": []})
        await send({"type": "http.response.body", "body": b"ok"})

    sent = []

    async def send(msg):
        sent.append(msg)

    headers = []
    if auth_header is not None:
        headers.append((b"authorization", auth_header.encode()))
    scope = {"type": "http", "headers": headers}
    mw = TokenAuthMiddleware(app, token_set)
    asyncio.run(mw(scope, None, send))
    status = next(m["status"] for m in sent if m["type"] == "http.response.start")
    return status, captured.get("called", False)


class TestTokenAuth:
    def test_no_header_401(self):
        status, called = run_middleware("secret", None)
        assert status == 401 and called is False

    def test_wrong_token_401(self):
        status, called = run_middleware("secret", "Bearer nope")
        assert status == 401 and called is False

    def test_right_token_passes(self):
        status, called = run_middleware("secret", "Bearer secret")
        assert status == 200 and called is True


class TestBindGuard:
    def test_non_loopback_requires_token(self, monkeypatch):
        from ppclock.mcp_server import main
        monkeypatch.delenv(TOKEN_ENV, raising=False)
        with pytest.raises(SystemExit):
            main(["--transport", "http", "--host", "0.0.0.0"])