"""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

# 叙述者常见别名 — 归一化到 narrator_name 或「叙述者」
_NARRATOR_ALIASES: frozenset[str] = frozenset(
    {
        "我",
        "本人",
        "人物",
        "叙述者",
        "讲述者",
        "老人",
        "自己",
        "咱们",
    }
)


def normalize_subject(subject: str | None, narrator_name: str | None = None) -> str:
    """将代词/泛称映射为统一 subject，便于去重与检索。"""
    s = (subject or "").strip()
    if not s:
        return narrator_name or "叙述者"
    if s in _NARRATOR_ALIASES:
        return narrator_name or "叙述者"
    return s


def dedupe_key(f: dict, *, narrator_name: str | None = None) -> tuple:
    s = normalize_subject(f.get("subject"), narrator_name)
    p = (f.get("predicate") or "").strip()
    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}