/*
 * Project: Go CLI Tool
 * Category: Go Projects
 * Description: Command-line interface tool built with Go. Features file operations, text processing, command parsing, and system utilities.
 * Author: RSK World
 * Email: support@rskworld.in
 * Website: https://rskworld.in/contact.php
 * Year: 2026
 * Copyright (c) 2026 RSK World. All rights reserved.
 */

package random

import (
	"crypto/rand"
	"fmt"
	"math/big"
)

// GeneratePassword creates a random alphanumeric password of specified length.
func GeneratePassword(length int) {
	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_+"
	password := make([]byte, length)
	for i := range password {
		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(charset))))
		if err != nil {
			fmt.Printf("Error generating random number: %v\n", err)
			return
		}
		password[i] = charset[num.Int64()]
	}
	fmt.Printf("Generated Password: %s\n", string(password))
}

// GenerateUUID generates a proper UUID v4.
func GenerateUUID() {
	b := make([]byte, 16)
	_, err := rand.Read(b)
	if err != nil {
		fmt.Printf("Error generating UUID: %v\n", err)
		return
	}
	// Set version to 4 (UUID v4)
	b[6] = (b[6] & 0x0f) | 0x40
	// Set variant to RFC 4122
	b[8] = (b[8] & 0x3f) | 0x80
	fmt.Printf("UUID: %08x-%04x-%04x-%04x-%012x\n",
		b[0:4], b[4:6], b[6:8], b[8:10], b[10:16])
}