from dataclasses import dataclass


@dataclass(frozen=True)
class DBSettings:
    pg_user: str
    pg_pass: str
    pg_host: str
    pg_port: int
    pg_db: str

    @property
    def db_url(self) -> str:
        return "postgresql+asyncpg://{}:{}@{}:{}/{}".format(
            self.pg_user,
            self.pg_pass,
            self.pg_host,
            self.pg_port,
            self.pg_db,
        )