package event

// Should be called manager?

// Bus can be implemente in other sturcts
type Bus interface {
	Emitter
	Receiver
}

// EventBus implementation
type eventBus struct {
	handlers map[string]*[]HandlerFunc
}

// NewBus Creates and Initializes an eventBus
func NewBus() Bus {
	return &eventBus{handlers: map[string]*[]HandlerFunc{}}
}
func (e *eventBus) Emit(evt Event) {
	handlerList, ok := e.handlers[evt.Name()]
	if !ok {
		return
	}
	for _, handler := range *handlerList {
		handler(evt)
	}

}

func (e *eventBus) On(name string, handler HandlerFunc) {
	handlerList, ok := e.handlers[name]
	if !ok {
		handlerList = &[]HandlerFunc{}
		e.handlers[name] = handlerList
	}

	*handlerList = append(*handlerList, handler)

}