from pydantic_settings import BaseSettings, SettingsConfigDict

"""
    pool_pre_ping=True,  # Verify connection before using
    pool_size=20,  # Maximum number of permanent connections
    max_overflow=10,  # Maximum number of additional connections
    pool_recycle=600,  # Recycle connections after 1 hour
    pool_timeout=30,  # Wait up to 30 seconds for a connection
    echo=True,  # Set to True for debugging SQL queries
"""


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

    DB: str = ""
    USER: str = ""
    PASSWORD: str = ""
    HOST: str = ""
    PORT: str = 0
    ENGINE: str = ""
    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_")


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