from __future__ import annotations


class ZaloUserError(Exception):
    pass


class ZaloUserAuthError(ZaloUserError):
    pass


class ZaloUserConnectionError(ZaloUserError):
    pass


class ZaloUserSendError(ZaloUserError):
    pass


class ZaloUserQRExpiredError(ZaloUserAuthError):
    pass


class ZaloUserQRDeclinedError(ZaloUserAuthError):
    pass


class ZaloUserNotAuthenticatedError(ZaloUserAuthError):
    pass


class ZaloUserWatchdogTimeoutError(ZaloUserConnectionError):
    pass


def classify_http_error(status_code: int, body: str = "") -> ZaloUserError:
    if status_code == 401:
        return ZaloUserAuthError(f"Authentication failed: {body}")
    if status_code == 403:
        return ZaloUserAuthError(f"Access denied: {body}")
    if 500 <= status_code < 600:
        return ZaloUserConnectionError(f"Sidecar error ({status_code}): {body}")
    return ZaloUserError(f"HTTP {status_code}: {body}")