<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\TextUI\Command;

use function file_get_contents;
use function sprintf;
use function version_compare;
use PHPUnit\Runner\Version;

/**
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 *
 * @codeCoverageIgnore
 */
final class VersionCheckCommand implements Command
{
    public function execute(): Result
    {
        $latestVersion           = file_get_contents('https://phar.phpunit.de/latest-version-of/phpunit');
        $latestCompatibleVersion = file_get_contents('https://phar.phpunit.de/latest-version-of/phpunit-' . Version::majorVersionNumber());

        $notLatest           = version_compare($latestVersion, Version::id(), '>');
        $notLatestCompatible = version_compare($latestCompatibleVersion, Version::id(), '>');

        if (!$notLatest && !$notLatestCompatible) {
            return Result::from(
                'You are using the latest version of PHPUnit.' . PHP_EOL,
            );
        }

        $buffer = 'You are not using the latest version of PHPUnit.' . PHP_EOL;

        if ($notLatestCompatible) {
            $buffer .= sprintf(
                'The latest version compatible with PHPUnit %s is PHPUnit %s.' . PHP_EOL,
                Version::id(),
                $latestCompatibleVersion,
            );
        }

        if ($notLatest) {
            $buffer .= sprintf(
                'The latest version is PHPUnit %s.' . PHP_EOL,
                $latestVersion,
            );
        }

        return Result::from($buffer);
    }
}
