"""Enrichment 共享：去重键与 object_json 规范化（sync/async 共用）。"""

from __future__ import annotations

import json
from typing import Any


def dedupe_key(f: dict) -> tuple:
    s = f.get("subject") or ""
    p = f.get("predicate") or ""
    o = f.get("object_json")
    try:
        oj = json.dumps(o, sort_keys=True, ensure_ascii=False) if o is not None else ""
    except (TypeError, ValueError):
        oj = str(o)
    return (str(s), str(p), oj)


def normalize_object_json(obj: Any) -> dict | list | None:
    if obj is None:
        return None
    if isinstance(obj, (dict, list)):
        return obj
    return {"value": obj}