import os
from dataclasses import dataclass

@dataclass
class AppConfig:
    hf_model_repo: str
    sql_backend: str # "bigquery" or "motherduck"
    gcp_project: str | None = None
    motherduck_db: str | None = None
    motherduck_token: str | None = None


@classmethod
def from_env(cls):
    return cls(
        hf_model_repo=os.getenv("HF_MODEL_REPO", "your-username/your-private-tabular-model"),
        sql_backend=os.getenv("SQL_BACKEND", "motherduck"),
        gcp_project=os.getenv("GCP_PROJECT"),
        motherduck_db=os.getenv("MOTHERDUCK_DB", "default"),
        motherduck_token=os.getenv("MOTHERDUCK_TOKEN")
)