"""ServiceRoot: ``GET /redfish/v1/`` (readable without credentials)."""

from __future__ import annotations

from collections.abc import Mapping
from typing import Any

from .common import link, links, text


def parse_service_root(root: Mapping[str, Any]) -> dict[str, Any]:
    """Version, identity and top-level links of a Redfish service.

    ``vendor`` and ``product`` exist from ServiceRoot 1.5 on; ``oem_vendors`` (the keys under
    ``Oem``) is what older services offer for picking a quirk module.
    """
    found = links(root)
    sessions = link(root, "Links", "Sessions")
    if sessions is not None:
        found["Sessions"] = sessions
    oem = root.get("Oem")
    return {
        "name": text(root.get("Name")),
        "redfish_version": text(root.get("RedfishVersion")),
        "uuid": text(root.get("UUID")),
        "vendor": text(root.get("Vendor")),
        "product": text(root.get("Product")),
        "oem_vendors": sorted(oem) if isinstance(oem, Mapping) else [],
        "links": found,
    }