package utils

import (
	"math/rand"
	"time"

	"github.com/bwmarrin/discordgo"
)

// TruncateString UTF8 truncation of string to `i` length
func TruncateString(s string, i int) string {
	runes := []rune(s)
	if len(runes) > i {
		return string(runes[:i])
	}
	return s
}

// SliceContainsChannelType looks for int value in a slice
func SliceContainsChannelType(s []discordgo.ChannelType, e discordgo.ChannelType) bool {
	for _, a := range s {
		if a == e {
			return true
		}
	}
	return false
}

// SliceContainsString looks for int value in a slice
func SliceContainsString(s []string, e string) bool {
	for _, a := range s {
		if a == e {
			return true
		}
	}
	return false
}

// RandIdx returns a random number within the specified range.
func RandIdx(n int) uint {
	if n == 0 {
		return 0
	}
	rand.Seed(time.Now().UnixNano())
	return uint(rand.Intn(n))
}