from functools import lru_cache

from pydantic import Field
from pydantic_settings import BaseSettings

from dotenv import load_dotenv
import os

load_dotenv()

class _BaseConfig(BaseSettings):
    environment: str = Field(default=os.getenv("ENVIRONMENT", "development"))
    
class _AppSettings(_BaseConfig):
    pass

class _DbSettings(_BaseConfig):
    username: str = Field(default=os.getenv("PG_USER"))
    password: str = Field(default=os.getenv("PG_PASSWORD"))
    db_name: str = Field(default=os.getenv("PG_DB_NAME"))


class _Settings(_BaseConfig):
    app: _AppSettings = _AppSettings()
    db: _DbSettings = _DbSettings()


@lru_cache
def get_settings() -> _Settings:
    return _Settings()