package bbgo

type Notifier interface {
	NotifyTo(channel, format string, args ...interface{}) error
	Notify(format string, args ...interface{}) error
}

type NullNotifier struct{}

func (n *NullNotifier) NotifyTo(channel, format string, args ...interface{}) error {
	return nil
}

func (n *NullNotifier) Notify(format string, args ...interface{}) error {
	return nil
}

type Notifiability struct {
	notifiers            []Notifier
	SessionChannelRouter *PatternChannelRouter
	SymbolChannelRouter  *PatternChannelRouter
	ObjectChannelRouter  *ObjectChannelRouter
}

func (m *Notifiability) RouteSymbol(symbol string) (channel string, ok bool) {
	return m.SymbolChannelRouter.Route(symbol)
}

func (m *Notifiability) RouteSession(session string) (channel string, ok bool) {
	return m.SessionChannelRouter.Route(session)
}

func (m *Notifiability) RouteObject(obj interface{}) (channel string, ok bool) {
	return m.ObjectChannelRouter.Route(obj)
}

func (m *Notifiability) AddNotifier(notifier Notifier) {
	m.notifiers = append(m.notifiers, notifier)
}

func (m *Notifiability) Notify(msg string, args ...interface{}) (err error) {
	for _, n := range m.notifiers {
		if err2 := n.Notify(msg, args...); err2 != nil {
			err = err2
		}
	}

	return err
}

func (m *Notifiability) NotifyTo(channel, msg string, args ...interface{}) (err error) {
	for _, n := range m.notifiers {
		if err2 := n.NotifyTo(channel, msg, args...); err2 != nil {
			err = err2
		}
	}

	return err
}