<?php

namespace app\utility;

use Hashids\Hashids;

class UnqId
{

    /**
     * @desc 生成密码
     * @param $string
     * @param $salt
     * @return string
     */
    public function encryptPassword($string, $salt): string
    {
        if (empty($string)) {
            return '';
        }

        $string = $salt.$string.$salt;
        return md5(md5($string).$salt);
    }

    /**
     * 校验密码是否正确
     * @param $string
     * @param $password
     * @param $salt
     * @return bool
     */
    public function checkPassword($string, $password, $salt): bool
    {
        $encryptPassword = $this->encryptPassword($string, $salt);
        return $encryptPassword == $password;
    }

    // 生成随机字符
    public function generateRandomCode($length = 15): string
    {
        $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
        $charLength = strlen($chars);
        $code = '';

        // 生成足够长度的安全随机数
        $randomBytes = random_bytes($length);

        for ($i = 0; $i < $length; $i++) {
            $code .= $chars[random_int(0, $charLength - 1)];
        }

        return $code;
    }

}