package gapr

import "time"

func WithRandomSeed(i int64) optionFunc {
	return func(o *options) {
		o.RandomSeed = i
	}
}

func WithTagName(tag string) optionFunc {
	return func(o *options) {
		o.TagName = tag
	}
}

func WithMapper(mapper KeyMapper) optionFunc {
	return func(o *options) {
		o.Mapper = mapper
	}
}

func defaultOptions() options {
	return options{
		TagName:    "gapr",
		RandomSeed: time.Now().UTC().Unix(),
		Mapper:     identityKeyMapper,
	}
}

type Option interface {
	apply(o *options)
}

type optionFunc func(o *options)

func (f optionFunc) apply(o *options) {
	f(o)
}

type options struct {
	TagName    string
	RandomSeed int64
	Mapper     KeyMapper
}