<?php

namespace app\admin\controller\fc;

use app\common\controller\Backend;
use think\Db;

/**
 * 同城分类信息 - 数据总览与运营看板
 *
 * 后台核心运营仪表盘：
 * 1. 今日核心指标与昨日对比（发布量 / 订单额 / 新增用户 / 浏览曝光量）
 * 2. 待办督办中心（帖子待审 / 商家待审 / 提现待审 / 举报待处理）
 * 3. 多时段多维趋势分析（近 7 天 / 14 天 / 30 天，支持发布量、订单额、新增用户、浏览量平滑折线图）
 * 4. 营收来源构成分析（会员购买 / 发帖付费 / 置顶推广 / 付费查看等占比环形图）
 * 5. 热门分类发帖分布与同城区域活跃排行
 * 6. 用户、会员、商户与分销生态资产全景
 *
 * @icon fa fa-dashboard
 */
class Dashboard extends Backend
{
    /**
     * 数据总览首页入口与数据下发
     *
     * @return string|\think\response\Json
     */
    public function index()
    {
        $todayStart = strtotime('today');
        $todayEnd   = $todayStart + 86400 - 1;
        $yesterdayStart = $todayStart - 86400;
        $yesterdayEnd   = $todayStart - 1;

        /* =========================================================
         * 1. 核心 KPI（今日、较昨日对比、累计总量）
         * ========================================================= */
        // 发布量
        $todayPost     = (int)Db::name('fc_post')->where('createtime', 'between', [$todayStart, $todayEnd])->count();
        $yesterdayPost = (int)Db::name('fc_post')->where('createtime', 'between', [$yesterdayStart, $yesterdayEnd])->count();
        $totalPost     = (int)Db::name('fc_post')->count();

        // 订单额与笔数（仅统计已支付订单）
        $todayOrderAmount = round((float)Db::name('fc_order')->where('status', 'paid')
            ->whereTime('paytime|createtime', 'between', [$todayStart, $todayEnd])->sum('amount'), 2);
        $yesterdayOrderAmount = round((float)Db::name('fc_order')->where('status', 'paid')
            ->whereTime('paytime|createtime', 'between', [$yesterdayStart, $yesterdayEnd])->sum('amount'), 2);
        $totalOrderAmount = round((float)Db::name('fc_order')->where('status', 'paid')->sum('amount'), 2);
        $todayOrderCount  = (int)Db::name('fc_order')->where('status', 'paid')
            ->whereTime('paytime|createtime', 'between', [$todayStart, $todayEnd])->count();
        $totalOrderCount  = (int)Db::name('fc_order')->where('status', 'paid')->count();

        // 用户与会员
        $todayUser     = (int)Db::name('user')->where('createtime', 'between', [$todayStart, $todayEnd])->count();
        $yesterdayUser = (int)Db::name('user')->where('createtime', 'between', [$yesterdayStart, $yesterdayEnd])->count();
        $totalUser     = (int)Db::name('user')->count();
        $memberCount   = (int)Db::name('fc_user_ext')->where('is_member', 1)->count();
        $merchantCount = (int)Db::name('fc_merchant')->count();
        $recommendMerchantCount = (int)Db::name('fc_merchant')->where('recommend', 1)->count();

        // 浏览量 PV
        $todayViews     = (int)Db::name('fc_view_log')->where('createtime', 'between', [$todayStart, $todayEnd])->count();
        $yesterdayViews = (int)Db::name('fc_view_log')->where('createtime', 'between', [$yesterdayStart, $yesterdayEnd])->count();
        $totalViews     = (int)Db::name('fc_post')->sum('views');

        $metrics = [
            'todayPost'            => $todayPost,
            'yesterdayPost'        => $yesterdayPost,
            'postDelta'            => $todayPost - $yesterdayPost,
            'totalPost'            => $totalPost,

            'todayOrderAmount'     => $todayOrderAmount,
            'yesterdayOrderAmount' => $yesterdayOrderAmount,
            'orderDelta'           => round($todayOrderAmount - $yesterdayOrderAmount, 2),
            'totalOrderAmount'     => $totalOrderAmount,
            'todayOrderCount'      => $todayOrderCount,
            'totalOrderCount'      => $totalOrderCount,

            'todayUser'            => $todayUser,
            'yesterdayUser'        => $yesterdayUser,
            'userDelta'            => $todayUser - $yesterdayUser,
            'totalUser'            => $totalUser,
            'memberCount'          => $memberCount,
            'merchantCount'        => $merchantCount,
            'recommendMerchant'    => $recommendMerchantCount,

            'todayViews'           => $todayViews,
            'yesterdayViews'       => $yesterdayViews,
            'viewsDelta'           => $todayViews - $yesterdayViews,
            'totalViews'           => $totalViews,
        ];

        /* =========================================================
         * 2. 待办督办中心（待审核事项与预警）
         * ========================================================= */
        $pendingPost = (int)Db::name('fc_post')->where('audit_status', 0)->count();
        $pendingMerchant = (int)Db::name('fc_merchant')->where('audit_status', 0)->count();
        $pendingWithdraw = (int)Db::name('fc_withdraw')->where('status', 'auditing')->count();
        $pendingWithdrawAmount = round((float)Db::name('fc_withdraw')->where('status', 'auditing')->sum('amount'), 2);
        $pendingReport = (int)Db::name('fc_report')->where('status', 'pending')->count();
        $pendingTotal = $pendingPost + $pendingMerchant + $pendingWithdraw + $pendingReport;

        $pending = [
            'total'                 => $pendingTotal,
            'post'                  => $pendingPost,
            'merchant'              => $pendingMerchant,
            'withdraw'              => $pendingWithdraw,
            'withdrawAmount'        => $pendingWithdrawAmount,
            'report'                => $pendingReport,
        ];

        /* =========================================================
         * 3. 平台生态与分销资产
         * ========================================================= */
        $commissionPending = round((float)Db::name('fc_commission')->where('status', 0)->sum('amount'), 2);
        $commissionSettled = round((float)Db::name('fc_commission')->where('status', 1)->sum('amount'), 2);
        $distributorCount  = (int)Db::name('fc_dist_relation')->distinct(true)->field('parent_id')->count();

        $ecosystem = [
            'commissionPending' => $commissionPending,
            'commissionSettled' => $commissionSettled,
            'distributorCount'  => $distributorCount,
            'memberRate'        => $totalUser > 0 ? round(($memberCount / $totalUser) * 100, 1) : 0,
        ];

        /* =========================================================
         * 4. 营收构成分析（按订单类型统计已支付实收）
         * ========================================================= */
        $orderTypeLabels = [
            'member'   => 'VIP会员购买',
            'post'     => '发布信息付费',
            'payview'  => '付费查看电话',
            'recharge' => '钱包充值',
            'top'      => '置顶推广套餐',
            'refresh'  => '信息刷新',
        ];

        $rawRevenue = Db::name('fc_order')
            ->where('status', 'paid')
            ->fieldRaw("type, count(*) as count, sum(amount) as amount")
            ->group('type')
            ->order('amount', 'desc')
            ->select();

        $revenueTotalSum = 0;
        $revenueTypes = [];
        foreach ($rawRevenue as $r) {
            $amt = round((float)$r['amount'], 2);
            $cnt = (int)$r['count'];
            $label = isset($orderTypeLabels[$r['type']]) ? $orderTypeLabels[$r['type']] : ($r['type'] ? $r['type'] : '其他服务');
            $revenueTotalSum += $amt;
            $revenueTypes[] = [
                'type'   => $r['type'],
                'label'  => $label,
                'count'  => $cnt,
                'amount' => $amt,
            ];
        }

        foreach ($revenueTypes as &$item) {
            $item['percent'] = $revenueTotalSum > 0 ? round(($item['amount'] / $revenueTotalSum) * 100, 1) : 0;
        }
        unset($item);

        /* =========================================================
         * 5. 热门分类发帖分布与同城区域排行
         * ========================================================= */
        // 一级分类发帖分布
        $rawCategories = Db::name('fc_category')
            ->alias('c')
            ->join('__FC_POST__ p', '(p.category_id = c.id OR p.category_id IN (SELECT sub.id FROM ' . config('database.prefix') . 'fc_category sub WHERE sub.pid = c.id))', 'LEFT')
            ->where('c.pid', 0)
            ->field('c.id, c.name, count(p.id) as post_count')
            ->group('c.id')
            ->order('post_count', 'desc')
            ->select();

        $categoryTotal = 0;
        $categoryRanks = [];
        foreach ($rawCategories as $c) {
            $cnt = (int)$c['post_count'];
            $categoryTotal += $cnt;
            $categoryRanks[] = [
                'id'    => $c['id'],
                'name'  => $c['name'],
                'count' => $cnt,
            ];
        }
        foreach ($categoryRanks as &$cItem) {
            $cItem['percent'] = $categoryTotal > 0 ? round(($cItem['count'] / $categoryTotal) * 100, 1) : 0;
        }
        unset($cItem);

        // 同城热门地区 Top 5
        $rawAreas = Db::name('fc_post')
            ->fieldRaw("IF(area != '', area, city) as region_name, count(*) as count")
            ->where("area != '' OR city != ''")
            ->group('region_name')
            ->order('count', 'desc')
            ->limit(5)
            ->select();
        $areaRanks = [];
        $areaMaxCount = 1;
        foreach ($rawAreas as $ar) {
            $cnt = (int)$ar['count'];
            if ($cnt > $areaMaxCount) {
                $areaMaxCount = $cnt;
            }
            $areaRanks[] = [
                'region_name' => $ar['region_name'] ? $ar['region_name'] : '未知区域',
                'count'       => $cnt,
            ];
        }
        foreach ($areaRanks as &$arItem) {
            $arItem['percent'] = round(($arItem['count'] / $areaMaxCount) * 100, 1);
        }
        unset($arItem);

        /* =========================================================
         * 6. 多时段趋势数据计算（近 7 天 / 14 天 / 30 天）
         * ========================================================= */
        $maxTrendDays = 30;
        $trendStart   = $todayStart - ($maxTrendDays - 1) * 86400;

        // 发帖趋势
        $postsMap = [];
        $postsQuery = Db::name('fc_post')
            ->where('createtime', 'between', [$trendStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(`createtime`,'%Y-%m-%d') AS day, COUNT(*) AS num")
            ->group('day')
            ->select();
        foreach ($postsQuery as $row) {
            $postsMap[$row['day']] = (int)$row['num'];
        }

        // 订单额趋势
        $ordersMap = [];
        $ordersQuery = Db::name('fc_order')
            ->where('status', 'paid')
            ->whereTime('paytime|createtime', 'between', [$trendStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(IFNULL(`paytime`,`createtime`),'%Y-%m-%d') AS day, SUM(`amount`) AS num")
            ->group('day')
            ->select();
        foreach ($ordersQuery as $row) {
            $ordersMap[$row['day']] = round((float)$row['num'], 2);
        }

        // 新增用户趋势
        $usersMap = [];
        $usersQuery = Db::name('user')
            ->where('createtime', 'between', [$trendStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(`createtime`,'%Y-%m-%d') AS day, COUNT(*) AS num")
            ->group('day')
            ->select();
        foreach ($usersQuery as $row) {
            $usersMap[$row['day']] = (int)$row['num'];
        }

        // 浏览量趋势
        $viewsMap = [];
        $viewsQuery = Db::name('fc_view_log')
            ->where('createtime', 'between', [$trendStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(`createtime`,'%Y-%m-%d') AS day, COUNT(*) AS num")
            ->group('day')
            ->select();
        foreach ($viewsQuery as $row) {
            $viewsMap[$row['day']] = (int)$row['num'];
        }

        // 计算 7/14/30 天数据包
        $ranges = [7, 14, 30];
        $allTrends = [];
        foreach ($ranges as $span) {
            $startTs = $todayStart - ($span - 1) * 86400;
            $dates = [];
            $posts = [];
            $orders = [];
            $users = [];
            $views = [];
            $rows = [];
            for ($i = 0; $i < $span; $i++) {
                $day = date('Y-m-d', $startTs + $i * 86400);
                $p = isset($postsMap[$day]) ? $postsMap[$day] : 0;
                $o = isset($ordersMap[$day]) ? $ordersMap[$day] : 0;
                $u = isset($usersMap[$day]) ? $usersMap[$day] : 0;
                $v = isset($viewsMap[$day]) ? $viewsMap[$day] : 0;

                $dates[] = $day;
                $posts[] = $p;
                $orders[] = $o;
                $users[] = $u;
                $views[] = $v;
                $rows[] = [
                    'date'   => $day,
                    'posts'  => $p,
                    'orders' => $o,
                    'users'  => $u,
                    'views'  => $v,
                ];
            }
            $allTrends[$span] = [
                'dates'  => $dates,
                'posts'  => $posts,
                'orders' => $orders,
                'users'  => $users,
                'views'  => $views,
                'rows'   => array_reverse($rows),
            ];
        }

        // 如果是 AJAX 请求局部刷新趋势，可直接返回对应时段数据
        if ($this->request->isAjax() && $this->request->get('action') === 'trend') {
            $days = (int)$this->request->get('days', 14);
            $trendData = isset($allTrends[$days]) ? $allTrends[$days] : $allTrends[14];
            return json(['code' => 1, 'msg' => 'ok', 'data' => $trendData]);
        }

        // 默认 14 天用于模板首屏初始化
        $defaultTrend = $allTrends[14];

        /* =========================================================
         * 7. 视图变量绑定与前端配置传递
         * ========================================================= */
        $this->view->assign('metrics', $metrics);
        $this->view->assign('pending', $pending);
        $this->view->assign('ecosystem', $ecosystem);
        $this->view->assign('revenueTypes', $revenueTypes);
        $this->view->assign('categoryRanks', $categoryRanks);
        $this->view->assign('areaRanks', $areaRanks);
        $this->view->assign('trendRows', $defaultTrend['rows']);
        $this->view->assign('updatedAt', date('Y-m-d H:i'));

        // 向前端 RequireJS 传入完整时段数据包及分类分布，供平滑渲染交互
        $this->assignconfig('allTrends', $allTrends);
        $this->assignconfig('revenueTypes', $revenueTypes);
        $this->assignconfig('categoryRanks', $categoryRanks);

        return $this->view->fetch();
    }
}