"""General helpers."""

from __future__ import annotations

import json
import os
import random
from pathlib import Path
import numpy as np
import torch


def set_seed(seed: int) -> None:
    random.seed(seed)
    np.random.seed(seed)
    torch.manual_seed(seed)
    torch.cuda.manual_seed_all(seed)


def ensure_dir(path: str | os.PathLike) -> Path:
    p = Path(path)
    p.mkdir(parents=True, exist_ok=True)
    return p


def save_json(obj, path: str | os.PathLike) -> None:
    path = Path(path)
    path.parent.mkdir(parents=True, exist_ok=True)
    with open(path, "w", encoding="utf-8") as f:
        json.dump(obj, f, indent=2)


def load_json(path: str | os.PathLike):
    with open(path, "r", encoding="utf-8") as f:
        return json.load(f)