<?php
declare(strict_types=1);

// Synthetic upstream probe: measures the maximum JSON output a model app will return.
// No patient data, no clinical content, no attachments. Prints sizes and token usage only.
$serverRoot = dirname(__DIR__, 2) . DIRECTORY_SEPARATOR . 'server' . DIRECTORY_SEPARATOR;
chdir($serverRoot);
require $serverRoot . 'vendor/autoload.php';
$app = new \think\App($serverRoot);
$app->initialize();

use app\common\service\DifyChatService;

$model = (string) ($argv[1] ?? 'qwen');
$count = (int) ($argv[2] ?? 200);
$prompt = '这是一次接口容量测试，与任何患者无关。请只输出一个JSON对象，键为items，值为长度恰好为' . $count
    . '的数组，每个元素形如{"i":序号从1开始,"t":"第N条测试文本，用于测量输出长度，请写满约二十个汉字"}。不要输出解释文字。';
$started = microtime(true);
$response = DifyChatService::chat($model, [], $prompt, 'probe-output-limit-' . $model, [], [
    'strict_files' => true, 'timeout' => 240,
]);
$content = (string) ($response['content'] ?? '');
$decoded = json_decode($content, true);
echo json_encode([
    'model' => $model,
    'requested_items' => $count,
    'ok' => (bool) ($response['ok'] ?? false),
    'error_code' => $response['error_code'] ?? '',
    'latency_ms' => (int) ($response['latency_ms'] ?? 0),
    'wall_seconds' => round(microtime(true) - $started, 1),
    'content_bytes' => strlen($content),
    'usage' => $response['usage'] ?? null,
    'json_valid' => is_array($decoded),
    'json_error' => is_array($decoded) ? '' : json_last_error_msg(),
    'returned_items' => is_array($decoded) && is_array($decoded['items'] ?? null) ? count($decoded['items']) : null,
    'tail_sample' => mb_substr($content, -60),
], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES), "\n";