<?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;

use think\facade\Db;
use ywxapp\controller\FrontendBase;

/**
 * IoT 插件前台展示页（免登录门面，对外介绍功能/能力/优势）
 *
 * GET /iot/index/index
 *
 * 遵循插件前台开发约定（与 articles/Index 同构）：
 *   - 继承 FrontendBase：视图根自动切到 addon/iot/view/frontend/，
 *     noNeedLogin 默认 ['*'] 游客放行，fetch 叠加皮肤覆盖层；
 *   - 控制器放 controller/ 根（非 api/backend 子目录），
 *     路由用字符串目标 'addon\iot\controller\Index@index'。
 * 数据侧只读聚合指标，全部 try/catch 兜底 —— 任何一张表缺失/异常都
 * 降级为 0，绝不 500（门面页的可用性 > 数据完整性）。
 */
class Index extends FrontendBase
{
    /**
     * 展示页
     */
    public function index()
    {
        $this->assign('stats', $this->liveStats());
        $this->assign('apiGroups', $this->apiCatalog());
        $this->assign('now', date('Y-m-d H:i'));
        return $this->fetch('index/index');
    }

    /**
     * 实时聚合指标（每项独立兜底，缺表/异常返回 0）
     */
    protected function liveStats(): array
    {
        $count = function (string $table, array $where = []): int {
            try {
                return (int) Db::name($table)->where($where)->count();
            } catch (\Throwable $e) {
                return 0;
            }
        };
        // Broker 快照（iot_stats id=1，Broker 进程每 2s 写入）
        $broker = ['uptime' => 0, 'clients_online' => 0, 'messages_received' => 0, 'retained' => 0];
        try {
            $row = Db::name('iot_stats')->where('id', 1)->find();
            if ($row) {
                $broker = array_merge($broker, array_intersect_key($row, $broker));
            }
        } catch (\Throwable $e) {
        }
        return [
            'uptime'      => $this->fmtUptime((int) $broker['uptime']),
            'online'      => (int) $broker['clients_online'],
            'recv'        => (int) $broker['messages_received'],
            'retained'    => (int) $broker['retained'],
            'devices'     => $count('iot_device'),
            'points'      => $count('iot_sensor_point'),
            'alerts'      => $count('iot_alert'),
            'scenes'      => $count('iot_scene'),
            'shares'      => $count('iot_share', ['status' => 1]),
            'ota_pkgs'    => $count('iot_ota'),
        ];
    }

    /** 供模板格式化运行时长（时:分:秒） */
    protected function fmtUptime(int $s): string
    {
        return sprintf('%d:%02d:%02d', intdiv($s, 3600), intdiv($s % 3600, 60), $s % 60);
    }

    /**
     * App API 能力域统计：从 route/app.php 自动解析（路由唯一真源）。
     * 宣传页只展示功能域划分与接口数量——不输出任何端点路径 / 主题字符串
     * （公开页面不做攻击者的侦察地图；详细契约见 docs/guide/iot_api_reference.md）。
     *
     * 解析约定：只匹配数组目标规则（本插件全部 App API 均为 [Xxx::class,'action'] 书写；
     * backend/* 与前台页是字符串目标，天然不会被误收）。
     * 同一 controller+action 只计首次出现：新域前缀 URL 注册在前、文件末尾的
     * 旧 client/* 兼容别名在后，去重避免兼容别名把数量翻倍。
     */
    protected function apiCatalog(): array
    {
        try {
            $file = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'route' . DIRECTORY_SEPARATOR . 'app.php';
            if (!is_file($file) || !preg_match_all(
                "#Route::(get|post)\(\s*'([^']+)'\s*,\s*\[(\w+)::class\s*,\s*'(\w+)'\]#",
                (string) @file_get_contents($file),
                $ms,
                PREG_SET_ORDER
            )) {
                return [];
            }
        } catch (\Throwable $e) {
            return [];
        }
        $domains = [
            'mqtt'    => ['ico' => '📡', 'label' => 'Broker 运维',   'blurb' => '运行状态、指标快照与消息直发'],
            'client'  => ['ico' => '📱', 'label' => '设备与会员',   'blurb' => '绑定认领、共享授权、短时票据与命令下发'],
            'monitor' => ['ico' => '📈', 'label' => '实时监测',     'blurb' => '历史曲线、分钟级聚合、告警与设备日志'],
            'scene'   => ['ico' => '⚡', 'label' => '场景联动',     'blurb' => '规则引擎、设备分组与批量控制'],
            'ota'     => ['ico' => '🚀', 'label' => '固件升级',     'blurb' => '升级包管理与分批推送进度跟踪'],
            '_root'   => ['ico' => '🔑', 'label' => '设备入云激活', 'blurb' => '出厂预置令牌换领一机一密凭证'],
        ];
        $groups = [];
        $seen   = [];   // "controller/action" => true：兼容别名去重
        foreach ($ms as $m) {
            [, , $rule, $ctrl, $action] = $m;
            $key = $ctrl . '/' . $action;
            if (isset($seen[$key])) {
                continue;
            }
            $seen[$key] = true;
            $domain = strpos($rule, '/') === false ? '_root' : strtok($rule, '/');
            if (!isset($domains[$domain])) {
                continue;   // 未知前缀不入目录
            }
            $groups[$domain] = $groups[$domain] ?? ($domains[$domain] + ['count' => 0]);
            $groups[$domain]['count']++;
        }
        return array_values($groups);
    }
}