<?php

/**
 * Device Detector - The Universal Device Detection library for parsing User Agents
 *
 * @link https://matomo.org
 *
 * @license http://www.gnu.org/licenses/lgpl.html LGPL v3 or later
 */
declare (strict_types=1);
namespace DeviceDetector\Parser\Client\Browser\Engine;

use DeviceDetector\Parser\Client\AbstractClientParser;
/**
 * Class Version
 *
 * Client parser for browser engine version detection
 */
class Version extends AbstractClientParser
{
    /**
     * @var string
     */
    private $engine;
    /**
     * Version constructor.
     *
     * @param string $ua
     * @param string $engine
     */
    public function __construct(string $ua, string $engine)
    {
        parent::__construct($ua);
        $this->engine = $engine;
    }
    /**
     * @inheritdoc
     */
    public function parse() : ?array
    {
        if (empty($this->engine)) {
            return null;
        }
        if ('Gecko' === $this->engine || 'Clecko' === $this->engine) {
            $pattern = '~[ ](?:rv[: ]([0-9.]+)).*(?:g|cl)ecko/\\d{8,10}~i';
            if (\preg_match($pattern, $this->userAgent, $matches)) {
                return ['version' => \array_pop($matches)];
            }
        }
        $engineToken = $this->engine;
        if ('Blink' === $this->engine) {
            $engineToken = 'Chr[o0]me|Chromium|Cronet';
        }
        if ('Arachne' === $this->engine) {
            $engineToken = 'Arachne\\/5\\.';
        }
        if ('LibWeb' === $this->engine) {
            $engineToken = 'LibWeb\\+LibJs';
        }
        \preg_match("~(?:{$engineToken})\\s*[/_]?\\s*((?(?=\\d+\\.\\d)\\d+[.\\d]*|\\d{1,7}(?=(?:\\D|\$))))~i", $this->userAgent, $matches);
        if (!$matches) {
            return null;
        }
        return ['version' => \array_pop($matches)];
    }
}
