from __future__ import annotations

import os
from dataclasses import dataclass


@dataclass(frozen=True)
class AppConfig:
    model_name: str = "meta/llama-3.3-70b-instruct"
    nvidia_env_key: str = "NVIDIA_API_KEY"
    base_url: str = "https://integrate.api.nvidia.com/v1"


def load_environment() -> str | None:
    api_key = os.getenv(AppConfig.nvidia_env_key)
    print(f"NVIDIA API Key loaded: {'✓' if api_key else '✗'}")
    if not api_key:
        print(f"⚠️  {AppConfig.nvidia_env_key} not set in environment")
    return api_key