import os
from typing import Optional
from dataclasses import dataclass

try:
    # Load variables from a local .env if present
    from dotenv import load_dotenv  # type: ignore

    load_dotenv()
except Exception:
    # If python-dotenv isn't installed, skip silently. Env vars still work.
    pass


@dataclass
class Settings:
    llm_provider: str = os.getenv("LLM_PROVIDER", "mock").lower()
    default_model: str = os.getenv("LLM_MODEL", "mock-echo-001")
    temperature: float = float(os.getenv("LLM_TEMPERATURE", "1.0"))
    openai_api_key: Optional[str] = os.getenv("OPENAI_API_KEY")
    dashscope_api_key: Optional[str] = (
        os.getenv("DASHSCOPE_API_KEY") or os.getenv("APIKEY")
    )
    upload_path: Optional[str] = os.getenv(
        "UPLOAD_PATH", "https://api.piaoquantv.com/ad/file/upload"
    )


def get_settings() -> Settings:
    return Settings()