from __future__ import annotations

import copy
import json
import os
from pathlib import Path
from tempfile import NamedTemporaryFile
from typing import Any


def _data_dir() -> Path:
    root = Path(os.getenv("CC_DATA_DIR", ".data")).resolve()
    root.mkdir(parents=True, exist_ok=True)
    return root


def _file_path(name: str) -> Path:
    safe = name.replace("\\", "_").replace("/", "_")
    return _data_dir() / safe


def load_json(name: str, default: Any) -> Any:
    path = _file_path(name)
    if not path.exists():
        return copy.deepcopy(default)
    try:
        return json.loads(path.read_text(encoding="utf-8"))
    except Exception:
        return copy.deepcopy(default)


def save_json(name: str, data: Any) -> None:
    path = _file_path(name)
    path.parent.mkdir(parents=True, exist_ok=True)

    with NamedTemporaryFile("w", encoding="utf-8", delete=False, dir=str(path.parent)) as tmp:
        json.dump(data, tmp, ensure_ascii=False, indent=2)
        tmp_path = Path(tmp.name)

    tmp_path.replace(path)