package configuration

import (
	"log"

	"github.com/fsnotify/fsnotify"
)

type ChangeNotifier struct {
	channels []chan<- Configuration
}

func NewChangeNotifier() *ChangeNotifier {
	return &ChangeNotifier{
		channels: make([]chan<- Configuration, 0),
	}
}

func (p *ChangeNotifier) Subscribe(ch chan<- Configuration) {
	p.channels = append(p.channels, ch)
}

func (p *ChangeNotifier) Notify(config Configuration) {
	for _, ch := range p.channels {
		select {
		case ch <- config:
		default:
		}
	}
}

func (p *ChangeNotifier) OnConfigChange(in fsnotify.Event) {
	log.Print("Reloading configuration")
	config := Global()
	p.Notify(config)
}