package business

import "time"

// reportDateDefaults fills missing bounds without discarding an explicit date.
// Reports include the end date, so a 30-day period starts 29 days earlier.
func reportDateDefaults(begin, end *time.Time, days int, now time.Time) (*time.Time, *time.Time) {
	if end == nil {
		local := now.In(portraitLocation)
		day := time.Date(local.Year(), local.Month(), local.Day(), 0, 0, 0, 0, portraitLocation)
		end = &day
	}
	if begin == nil {
		first := end.AddDate(0, 0, 1-days)
		begin = &first
	}
	return begin, end
}