package tools

import "time"

func TimeUntilFriday() time.Duration {
	today := time.Now()
	weekday := today.Weekday()
	switch weekday {
	case time.Monday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+4, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)
	case time.Tuesday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+3, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)
	case time.Wednesday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+2, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)
	case time.Thursday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+1, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)
	case time.Friday:
		friday := time.Date(today.Year(), today.Month(), today.Day(), 17, 0, 0, 0, today.Location())
		if friday.Sub(today) > 0 {
			return friday.Sub(today)
		} else if friday.Sub(today) < 0 {
			friday = time.Date(today.Year(), today.Month(), today.Day()+7, 17, 0, 0, 0, today.Location())
			return friday.Sub(today)
		} else {
			return 0
		}
	case time.Saturday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+6, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)
	case time.Sunday:
		friday := time.Date(today.Year(), today.Month(), today.Day()+5, 17, 0, 0, 0, today.Location())
		return friday.Sub(today)

	}
	return 0
}