<?php

use app\common\service\ai\DeepSeekClient;

require __DIR__ . '/../../server/vendor/autoload.php';

function fail(string $message): void
{
    fwrite(STDERR, $message . PHP_EOL);
    exit(1);
}

$client = (new ReflectionClass(DeepSeekClient::class))->newInstanceWithoutConstructor();
$method = new ReflectionMethod(DeepSeekClient::class, 'extractResponsesContent');
$method->setAccessible(true);

try {
    $content = $method->invoke($client, null);
} catch (Throwable $e) {
    fail('Responses 返回体解析遇到 null 时不应抛异常: ' . get_class($e) . ' ' . $e->getMessage());
}

if ($content !== '') {
    fail('Responses 返回体为 null 时应解析为空字符串，实际为: ' . var_export($content, true));
}

echo 'DeepSeekClient 非 JSON/null 返回体解析防护测试通过' . PHP_EOL;