package helper

import (
	"fmt"
	"time"
)

func GetMonday(ts time.Time) time.Time {
	if ts.Weekday() != time.Monday {
		if ts.Weekday() == time.Sunday {
			return ts.AddDate(0, 0, -6)
		} else {
			return ts.AddDate(0, 0, -int(ts.Weekday()-1))
		}
	}
	return ts
}

func IsWeekend(ts time.Time) bool {
	return ts.Weekday() == time.Saturday || ts.Weekday() == time.Sunday
}

func GetKW(t time.Time) int {
	_, kw := t.ISOWeek()
	return kw
}

// Converts duration to string
func FormatDuration(d time.Duration) string {
	hours := int(d.Abs().Hours())
	minutes := int(d.Abs().Minutes()) % 60
	sign := ""
	if d < 0 {
		sign = "-"
	}
	switch {
	case hours > 0 && minutes == 0:
		return fmt.Sprintf("%s%dh", sign, hours)
	case hours > 0:
		return fmt.Sprintf("%s%dh %dmin", sign, hours, minutes)
	case minutes > 0:
		return fmt.Sprintf("%s%dmin", sign, minutes)
	default:
		return ""
	}
}