from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", extra="ignore")

    app_name: str = "Subfeed"

    database_url: str = "postgresql+psycopg://subfeed:subfeed@db:5432/subfeed"

    # Session cookie signing key.
    secret_key: str = "change-me-session-key"
    # Fernet key (urlsafe base64, 32 bytes) for encrypting stored refresh tokens.
    token_encryption_key: str = ""

    google_client_id: str = ""
    google_client_secret: str = ""
    oauth_redirect_url: str = "http://localhost:8080/auth/callback"

    # Comma-separated invite list / admin list of Google account emails.
    allowed_emails: str = ""
    admin_emails: str = ""

    # Origin of a separately served frontend dev server (enables CORS). Empty in production.
    frontend_origin: str = ""

    @property
    def allowed_email_set(self) -> set[str]:
        return {e.strip().lower() for e in self.allowed_emails.split(",") if e.strip()}

    @property
    def admin_email_set(self) -> set[str]:
        return {e.strip().lower() for e in self.admin_emails.split(",") if e.strip()}


settings = Settings()