import requests

STANDS = [
    "https://lk-api-gateway-dev.ngcloud.ru/api/v1/svc",
    "https://lk-api-gateway-test.ngcloud.ru/api/v1/svc",
]


def detect_endpoint(token):
    """Пробуем токен против dev и test стендов, возвращаем рабочий URL."""
    for ep in STANDS:
        try:
            c = HttpClient(ep, token)
            data = c.get("/instances", params={"pageSize": 1, "page": 1})
            if data.get("results") is not None:
                return ep
        except Exception:
            continue
    return None


class HttpClient:
    def __init__(self, endpoint, token):
        self._endpoint = endpoint.rstrip("/")
        self._session = requests.Session()
        self._session.headers.update({
            "Authorization": f"Bearer {token}",
            "User-Agent": "Mozilla/5.0",
        })

    def get(self, path, **kwargs):
        kwargs.setdefault("timeout", 10)
        r = self._session.get(f"{self._endpoint}{path}", **kwargs)
        r.raise_for_status()
        return r.json()

    def post(self, path, data=None, **kwargs):
        kwargs.setdefault("timeout", 30)
        url = f"{self._endpoint}{path}"
        r = self._session.post(url, json=(data if data is not None else {}), **kwargs)
        if not r.ok:
            raise Exception(f"POST {path}: {r.status_code} {r.reason}: {r.text[:200]}")
        result = {}
        try:
            parsed = r.json()
            if isinstance(parsed, dict):
                result = parsed
        except Exception:
            pass
        loc = r.headers.get("Location", "")
        if loc:
            result["_location"] = loc
        return result