package tools

import "time"

func GetStartOfLastMonth() time.Time {
	d := time.Now().AddDate(0, -1, 0)
	return GetZeroTime(d)
}

func GetFirstDateOfMonth(d time.Time) time.Time {
	d = d.AddDate(0, 0, -d.Day()+1)
	return GetZeroTime(d)
}

func GetFirstDateOfNextMonth(d time.Time) time.Time {
	lastDay := GetFirstDateOfMonth(d).AddDate(0, 1, -1)
	return lastDay.Add(24 * time.Hour)
}

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

func GetTodayStartPoint() time.Time {
	now := time.Now()
	return time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, time.Local)
}

func GetYesterdayStartPoint() time.Time {
	now := time.Now().Add(-24 * time.Hour)
	return time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, time.Local)
}

func GetSevenDayStartPoint() time.Time {
	now := time.Now().Add(-24 * 7 * time.Hour)
	return time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, time.Local)
}

func GetNextDayStartPoint() time.Time {
	next := time.Now().Add(24 * time.Hour)
	return time.Date(next.Year(), next.Month(), next.Day(), 0, 0, 0, 0, time.Local)
}

func GetToday23Clock() time.Time {
	now := time.Now()
	return time.Date(now.Year(), now.Month(), now.Day(), 23, 0, 0, 0, time.Local)
}

func GetTomorrow23Clock() time.Time {
	next := time.Now().Add(24 * time.Hour)
	return time.Date(next.Year(), next.Month(), next.Day(), 23, 0, 0, 0, time.Local)
}