"""Settings management."""

from pathlib import Path
from pydantic import Field
from pydantic_settings import (
    BaseSettings,
    SettingsConfigDict,
)
from sqlalchemy import URL


DEFAULT_DATABASE = "sshecret.db"


class BackendSettings(BaseSettings):
    """Backend settings."""

    model_config = SettingsConfigDict(
        env_file=".backend.env", env_prefix="sshecret_backend_"
    )

    database: str = Field(default=DEFAULT_DATABASE)
    admin_token: str | None = Field(default=None, alias="sshecret_admin_backend_token")
    sshd_token: str | None = Field(default=None, alias="sshecret_sshd_backend_token")

    @property
    def db_url(self) -> URL:
        """Construct database url."""
        return URL.create(drivername="sqlite", database=self.database)

    @property
    def async_db_url(self) -> URL:
        """Construct database url with sync handling."""
        return URL.create(drivername="sqlite+aiosqlite", database=self.database)

    @property
    def db_exists(self) -> bool:
        """Check if databatase exists."""
        return Path(self.database).exists()


def get_settings() -> BackendSettings:
    """Get settings."""
    return BackendSettings()