<?php

namespace app\common\service\iot;

use think\facade\Config;
use app\common\service\HttpService;

class IotService
{
    /**
     * @var HttpService HTTP服务
     */
    protected $httpService;

    /**
     * @var array 配置
     */
    protected $config;

    public function __construct()
    {
        $this->httpService = new HttpService();
        $this->config = $this->getConfig();
    }

    /**
     * 控制设备开关
     */
    public function controlDevice(string $deviceId, int $powerState)
    {
        // 验证参数
        if (empty($deviceId)) {
            throw new \Exception('未配置空开设备');
        }

        if (!in_array($powerState, [0, 1])) {
            throw new \Exception('电源状态值无效');
        }

        // 生成签名
        $timestamp = time();
        $sign = $this->generateSign($timestamp);

        // 构建URL
        $url = "{$this->config['base_url']}/{$this->config['app_key']}/device/control/?sign={$sign}&ts={$timestamp}";

        // 构建请求数据
        $data = [
            'device' => $deviceId,
            'power' => $powerState
        ];

        // 发送请求
        return $this->httpService->json($url, 'POST', $data);
    }

    /**
     * 生成签名
     */
    protected function generateSign(int $timestamp): string
    {
        $appSecret = $this->config['app_secret'];
        return md5(md5($appSecret) . $timestamp);
    }

    /**
     * 获取配置
     */
    protected function getConfig(): array
    {

        $config = Config::get('door.other', []);

        // 优先从配置读取，没有则使用默认值
        return [
            'base_url' => 'https://iot-api.unisoft.cn',
            'app_key' => 'ptyVWcgl9p',
            'app_secret' => 'c9fc117f9ec942449c7e61812cd245b4',
        ];
    }
}