package utils

import (
	"time"
)

func VeryBeginOfDate(date time.Time) time.Time {
	return time.Date(date.Year(), date.Month(), date.Day(), 0, 0, 0, 0, date.Location())
}

func VeryEndOfDate(date time.Time) time.Time {
	return time.Date(date.Year(), date.Month(), date.Day(), 23, 59, 59, 999999999, date.Location())
}

func DifferenceInMonth(t1, t2 time.Time) int {
	var differYear, differMonth int
	if t1.After(t2) {
		differYear = t1.Year() - t2.Year()
		differMonth = int(t1.Month() - t2.Month())
	} else {
		differYear = t2.Year() - t1.Year()
		differMonth = int(t2.Month() - t1.Month())
	}
	return differYear*12 + differMonth
}

func IsNextMonth(t1, t2 time.Time) bool {
	return DifferenceInMonth(t1, t2) == 1
}