var (
	// DefaultConfig is the default CasbinAuth middleware config.
	DefaultConfig = Config{
		Skipper: middleware.DefaultSkipper,
		UserGetter: func(c echo.Context) (string, error) {
			username, _, _ := c.Request().BasicAuth()
			return username, nil
		},
		ErrorHandler: func(c echo.Context, internal error, proposedStatus int) error {
			err := echo.NewHTTPError(proposedStatus, internal.Error())
			err.Internal = internal
			return err
		},
	}
)

type Config struct {
	// Skipper defines a function to skip middleware.
	Skipper middleware.Skipper

	// Enforcer CasbinAuth main rule.
	// One of Enforcer or EnforceHandler fields is required.
	Enforcer *casbin.Enforcer

	// EnforceHandler is custom callback to handle enforcing.
	// One of Enforcer or EnforceHandler fields is required.
	EnforceHandler func(c echo.Context, user string) (bool, error)

	// Method to get the username - defaults to using basic auth
	UserGetter func(c echo.Context) (string, error)

	// Method to handle errors
	ErrorHandler func(c echo.Context, internal error, proposedStatus int) error
}