<?php
namespace app\service;

use Swoole\Client;

class SwooleService
{
    private static ?self $instance = null;

    private string $host = 'ossup.jzvisa.com';
    private int $port = 19501;
    private float $timeout = 3.0;

    // 私有化构造函数，保留原来的单例调用方式
    private function __construct()
    {
    }

    // 获取单例
    public static function getInstance(): self
    {
        if (self::$instance === null) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    // 发送任务：短连接模式，每次连接、发送、关闭
    public function sendTask(array $task): bool
    {
        $client = new Client(SWOOLE_SOCK_TCP);

        try {
            if (!$client->connect($this->host, $this->port, $this->timeout)) {
                throw new \RuntimeException(
                    "Cannot connect to Swoole Server {$this->host}:{$this->port}, error: {$client->errCode}"
                );
            }

            $data = json_encode($task, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

            if ($data === false) {
                throw new \RuntimeException('JSON encode failed: ' . json_last_error_msg());
            }

            // 你的服务端使用 \r\n 作为 package_eof，所以这里必须加 \r\n
            $sendResult = $client->send($data . "\r\n");

            return $sendResult !== false;
        } finally {
            if ($client->isConnected()) {
                $client->close();
            }
        }
    }

    // 保留 close 方法，避免旧代码调用时报错
    public function close(): void
    {
        self::$instance = null;
    }
}