package gelfexporter

type config struct {
	GelfUrl string
	AppName string
	Tag     string
}

// newConfig creates a validated Config configured with options
func newConfig(options ...Option) (config, error) {
	cfg := config{}
	for _, opt := range options {
		cfg = opt.apply(cfg)
	}
	return cfg, nil
}

// Option sets the value of an option for a Config.
type Option interface {
	apply(config) config
}

func WithGelfUrl(url string) Option {
	return gelfUrlOption(url)
}

type gelfUrlOption string

func (o gelfUrlOption) apply(cfg config) config {
	cfg.GelfUrl = string(o)
	return cfg
}

func WithAppName(url string) Option {
	return appName(url)
}

type appName string

func (o appName) apply(cfg config) config {
	cfg.AppName = string(o)
	return cfg
}

func WithTag(tagStr string) Option {
	return tag(tagStr)
}

type tag string

func (o tag) apply(cfg config) config {
	cfg.Tag = string(o)
	return cfg
}