app/config.py

from functools import lru_cache
from typing import Optional

from pydantic import Field
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Central configuration for the HuggingFace backend."""

    default_num_items: int = Field(10, env="KALSHI_DEFAULT_NUM_ITEMS")
    skip_dub: bool = Field(False, env="KALSHI_SKIP_DUB")
    template_root: str = Field("kalshi(email)/kalshi(email)", env="KALSHI_TEMPLATE_DIR")
    template_archive_dir: str = Field("template_archive", env="KALSHI_TEMPLATE_ARCHIVE")
    header_path: str = Field("header.png", env="KALSHI_HEADER_PATH")
    header_link: str = Field("https://kalshi.com", env="KALSHI_HEADER_LINK")
    supabase_url: Optional[str] = Field(None, env="SUPABASE_URL")
    supabase_service_key: Optional[str] = Field(None, env="SUPABASE_SERVICE_KEY")
    storage_prefix: str = Field("", env="STORAGE_PREFIX")
    openai_api_key: Optional[str] = Field(None, env="OPENAI_API_KEY")

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = False


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    """Return a cached instance so imports stay cheap."""
    return Settings()