package searcher

// Opter Opter
type Opter interface {
	SetSkip(v int64) Opter
	Skip() int64
	SetLimit(v int64) Opter
	Limit() int64
	SetSort(key string, v int64) Opter
	Sort() D
}

type Option struct {
	skip  *int64
	limit *int64
	sort  D
}

const MaxLimit = 50

const MinLimit = 1

func (o *Option) Skip() int64 {
	if o.skip == nil {
		return 0
	}
	return *o.skip
}

func (o *Option) SetSkip(v int64) Opter {
	o.skip = &v
	return o
}

func (o *Option) Limit() int64 {
	if o.limit == nil {
		return MinLimit
	}
	if *o.limit > MaxLimit {
		return MaxLimit
	}
	return *o.limit
}

func (o *Option) SetLimit(v int64) Opter {
	o.limit = &v
	return o
}

func (o *Option) Sort() D {
	return o.sort
}

func (o *Option) SetSort(key string, v int64) Opter {
	o.sort = append(o.sort, E{Key: key, Value: v})
	return o
}