<?php
/**
 * Mirasvit
 *
 * This source file is subject to the Mirasvit Software License, which is available at https://mirasvit.com/license/.
 * Do not edit or add to this file if you wish to upgrade the to newer versions in the future.
 * If you wish to customize this module for your needs.
 * Please refer to http://www.magentocommerce.com for more information.
 *
 * @category  Mirasvit
 * @package   mirasvit/module-rma
 * @version   2.0.60
 * @copyright Copyright (C) 2019 Mirasvit (https://mirasvit.com/)
 */



namespace Mirasvit\Rma\Helper;

class StringHelper extends \Magento\Framework\DataObject
{
    /**
     * @param int $length
     * @return string
     */
    public function generateRandNum($length)
    {
        $characters = '0123456789';
        $randomString = '';
        for ($i = 0; $i < $length; ++$i) {
            $randomString .= $characters[rand(0, strlen($characters) - 1)];
        }

        return $randomString;
    }

    /**
     * @param int $length
     * @return string
     */
    public function generateRandString($length)
    {
        $characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $randomString = '';
        for ($i = 0; $i < $length; ++$i) {
            $randomString .= $characters[rand(0, strlen($characters) - 1)];
        }

        return $randomString;
    }

    /**
     * @param int $timestamp
     * @param int $detailLevel
     * @return string
     * Takes a unix timestamp and returns a relative time string such as "3 minutes ago",
     *   "2 months from now", "1 year ago", etc
     * The detailLevel parameter indicates the amount of detail. The examples above are
     * with detail level 1. With detail level 2, the output might be like "3 minutes 20
     *   seconds ago", "2 years 1 month from now", etc.
     * With detail level 3, the output might be like "5 hours 3 minutes 20 seconds ago",
     *   "2 years 1 month 2 weeks from now", etc.
     */
    public function nicetime($timestamp, $detailLevel = 1)
    {
        $periods = ['sec', 'min', 'hour', 'day', 'week', 'month', 'year', 'decade'];
        $lengths = ['60', '60', '24', '7', '4.35', '12', '10'];

        $now = time();

        // check validity of date
        if (empty($timestamp)) {
            return 'Unknown time';
        }

        // is it future date or past date
        if ($now > $timestamp) {
            $difference = $now - $timestamp;
            $tense = 'ago';
        } else {
            $difference = $timestamp - $now;
            $tense = 'from now';
        }

        if ($difference == 0) {
            return '1 sec ago';
        }

        $remainders = [];

        for ($j = 0; $j < count($lengths); ++$j) {
            $remainders[$j] = floor(fmod($difference, $lengths[$j]));
            $difference = floor($difference / $lengths[$j]);
        }

        $difference = round($difference);

        $remainders[] = $difference;

        $string = '';

        for ($i = count($remainders) - 1; $i >= 0; --$i) {
            if ($remainders[$i]) {
                $string .= $remainders[$i].' '.$periods[$i];

                if ($remainders[$i] != 1) {
                    $string .= 's';
                }

                $string .= ' ';

                --$detailLevel;

                if ($detailLevel <= 0) {
                    break;
                }
            }
        }

        return $string.$tense;
    }
}
