from functools import lru_cache
from typing import Optional
from os import getenv
from pydantic import BaseSettings, PostgresDsn

class Settings(BaseSettings):
  database_url: Optional[PostgresDsn]

@lru_cache
def get_settings() -> Settings:
  settings = Settings()  # type: ignore
  
  # if (db := getenv("POSTGRES_DB")) is not None:
  #   # settings.database_url = PostgresDsn.build(
  #   #       scheme="postgresql",
  #   #       user=settings.database_url.user,
  #   #       password=settings.database_url.password,
  #   #       host=settings.database_url.host,
  #   #       port=settings.database_url.port,
  #   #       path=f"/{db}",
  #   # )
  #   settings.database_url = PostgresDsn.build(
  #         scheme="postgresql",
  #         user='barbie',
  #         password='redStar4,1',
  #         host='localhost',
  #         port='5432',
  #         path=f"/{db}",
  #   )
  if (db := getenv("CONNECTION_STRING")) is not None:
    settings.database_url = getenv("CONNECTION_STRING")
  
  return settings