# /projects/bfoj/AttrLLM/loader/utils.py
import os
import random
import platform
from dataclasses import dataclass
from typing import Dict, Any, Optional

try:
    import torch
except Exception:
    torch = None

@dataclass
class DeviceInfo:
    python_version: str
    platform: str
    cuda_available: bool
    cuda_device: Optional[str]
    torch_version: Optional[str]

def device_info() -> Dict[str, Any]:
    """Return a dict with basic runtime & device diagnostics."""
    cuda_avail = bool(torch and torch.cuda.is_available())
    return {
        "python_version": platform.python_version(),
        "platform": platform.platform(),
        "torch_version": getattr(torch, "__version__", None),
        "cuda_available": cuda_avail,
        "cuda_device": (torch.cuda.get_device_name(0) if (cuda_avail and torch) else None),
    }

def set_seed(seed: int) -> None:
    """Seed Python & Torch RNGs for reproducibility (best-effort)."""
    random.seed(seed)
    if torch:
        try:
            torch.manual_seed(seed)
            if torch.cuda.is_available():
                torch.cuda.manual_seed_all(seed)
        except Exception:
            pass
    os.environ["PYTHONHASHSEED"] = str(seed)