package analytic

import "time"

func normalizeLimitOffset(limit, offset int) (int, int) {
	if limit <= 0 {
		limit = 50
	}
	if limit > 100 {
		limit = 100
	}
	if offset < 0 {
		offset = 0
	}
	return limit, offset
}

// convert age range -> DOB range
func ageRangeToDOB(minAge, maxAge *int, now time.Time) (dobFrom, dobTo *time.Time) {
	// maxAge => DOB >= now-(maxAge+1y)+1day
	// eg: now is : 3/31/2026; maxAge=30 => (now - 31)= 3/31/1994 => +=1
	if maxAge != nil {
		t := now.AddDate(-*maxAge-1, 0, 0).Add(24 * time.Hour)
		dobFrom = &t
	}
	// minAge => DOB <= now-minAge
	if minAge != nil {
		t := now.AddDate(-*minAge, 0, 0)
		dobTo = &t
	}
	return
}