package mcfetch

import (
	"regexp"
	"strings"
)

// IsValidUsername checks if the username is valid
func IsValidUsername(username string) bool {
	if len(username) < 3 || len(username) > 16 {
		return false
	}
	validChars := "abcdefghijklmnopqrstuvwxyz1234567890_"
	for _, char := range strings.ToLower(username) {
		if !strings.ContainsRune(validChars, char) {
			return false
		}
	}
	return true
}

// IsValidUUID checks if a UUID is valid
func IsValidUUID(uuid string) bool {
	matched, _ := regexp.MatchString("^[0-9a-fA-F]{32}$", strings.ReplaceAll(uuid, "-", ""))
	return matched
}

// UndashUUID removes dashes from UUIDs
func UndashUUID(uuid string) string {
	return strings.ReplaceAll(uuid, "-", "")
}

// DashUUID adds dashes to UUIDs at standard positions
func DashUUID(uuid string) string {
	return uuid[:8] + "-" + uuid[8:12] + "-" + uuid[12:16] + "-" + uuid[16:20] + "-" + uuid[20:]
}