<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare(strict_types=1);

namespace addon\iot\controller\backend;

use think\facade\Db;
use think\facade\View;
use ywxapp\controller\BackendBase;
use addon\iot\model\Connection;
use addon\iot\model\Message;

/**
 * 概览控制器（实时运行仪表盘 + 最近消息）
 *
 * 实时指标由页面轮询 statsData 接口获取，此处仅取最近消息；
 * 原独立的 stats 实时监控页已并入概览页。
 */
class Overview extends BackendBase
{
    /**
     * 概览页
     */
    public function index()
    {
        $recent = Message::order('id', 'desc')->limit(10)->select()->toArray();
        // JSON_HEX_* 转义后由模板 {$recentJson|raw} 输出，供前端 layui.table 本地渲染
        View::assign('recentJson', (string) json_encode($recent, JSON_UNESCAPED_UNICODE
            | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT));
        return View::fetch('admin/index');
    }

    /**
     * 运行监控数据接口（供概览页轮询实时指标）
     */
    public function statsData()
    {
        $row = Db::name('iot_stats')->where('id', 1)->find();
        if (!$row) {
            $row = [
                'uptime' => 0, 'clients_online' => 0, 'clients_total' => 0,
                'subscriptions' => 0, 'messages_received' => 0, 'messages_sent' => 0,
                'retained' => 0, 'timestamp' => time(),
            ];
        }
        // 以连接表的实时在线数补全（更贴近 DB 视角的在线状态）
        try {
            $row['db_online'] = Connection::where('status', 1)->count();
        } catch (\Throwable $e) {
            $row['db_online'] = $row['clients_online'] ?? 0;
        }
        $this->result->success($row);
    }
}