package utils

import (
	"crypto/rand"
	"encoding/hex"
	"math"

	"strings"
	"time"
)

func Now() time.Time {
	return time.Now().UTC()
}

func StripAfterDot(s string) string {
	if idx := strings.Index(s, "."); idx != -1 {
		return s[:idx]
	}
	return s
}

func NameFromEmail(email string) string {
	parts := strings.SplitN(email, "@", 2)
	if len(parts) > 0 {
		return parts[0]
	}
	return ""
}

func RoundFloat(val float32, precision uint) float32 {
    ratio := math.Pow(10, float64(precision))
    return float32(math.Round(float64(val)*ratio) / ratio)
}

func MustRandToken(n int) string {
	b := make([]byte, n)
	if _, err := rand.Read(b); err != nil {
		panic(err)
	}
	return hex.EncodeToString(b)
}