from pydantic_settings import BaseSettings, SettingsConfigDict


class Configs(BaseSettings):
    """
    Postgresql configuration settings.
    """

    DB: str = ""
    USER: str = ""
    PASSWORD: str = ""
    HOST: str = ""
    PORT: int = 0
    ENGINE: str = "postgresql+psycopg2"
    POOL_PRE_PING: bool = True
    POOL_SIZE: int = 20
    MAX_OVERFLOW: int = 10
    POOL_RECYCLE: int = 600
    POOL_TIMEOUT: int = 30
    ECHO: bool = True

    @property
    def url(self):
        """Generate the database URL."""
        return f"{self.ENGINE}://{self.USER}:{self.PASSWORD}@{self.HOST}:{self.PORT}/{self.DB}"

    model_config = SettingsConfigDict(env_prefix="POSTGRES_")


#  singleton instance of the POSTGRESQL configuration settings
postgres_configs = Configs()