<?php

namespace app\admin\controller\fc;

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

/**
 * 同城-数据总览
 *
 * 后台核心看板：今日/累计发布量、待审核数、今日/累计订单额、会员数、商家数、
 * 分销佣金（待结算/已结算）、提现待审数，以及近 14 天趋势（发布量 / 订单额 / 新增注册用户）。
 * 数据一律由本控制器直接查库（fa_fc_* / fa_user），不在视图里写 SQL，也不走 /api/v1/admin/**。
 *
 * @icon fa fa-dashboard
 */
class Dashboard extends Backend
{
    /** 趋势统计天数 */
    const TREND_DAYS = 14;

    /**
     * 查看
     */
    public function index()
    {
        $todayStart = strtotime('today');
        $todayEnd   = $todayStart + 86400 - 1;

        /* ---------- 核心指标 ---------- */
        $metrics = [
            // 发布量
            'todayPost'         => (int)Db::name('fc_post')->where('createtime', 'between', [$todayStart, $todayEnd])->count(),
            'totalPost'         => (int)Db::name('fc_post')->count(),
            'pendingPost'       => (int)Db::name('fc_post')->where('audit_status', 0)->count(),
            // 订单额（仅统计已支付订单；paytime 缺失时回落 createtime）
            'todayOrderAmount'  => round((float)Db::name('fc_order')->where('status', 'paid')
                ->whereTime('paytime|createtime', 'between', [$todayStart, $todayEnd])->sum('amount'), 2),
            'totalOrderAmount'  => round((float)Db::name('fc_order')->where('status', 'paid')->sum('amount'), 2),
            // 用户 / 商家
            'memberCount'       => (int)Db::name('fc_user_ext')->where('is_member', 1)->count(),
            'merchantCount'     => (int)Db::name('fc_merchant')->count(),
            'userCount'         => (int)Db::name('user')->count(),
            // 分销佣金
            '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),
            // 提现待审核
            'withdrawAuditing'  => (int)Db::name('fc_withdraw')->where('status', 'auditing')->count(),
        ];

        /* ---------- 近 14 天趋势 ---------- */
        $dateStart = $todayStart - (self::TREND_DAYS - 1) * 86400;
        $days      = [];
        for ($i = 0; $i < self::TREND_DAYS; $i++) {
            $days[] = date('Y-m-d', $dateStart + $i * 86400);
        }

        // 每天发布量
        $postsMap = [];
        $posts = Db::name('fc_post')
            ->where('createtime', 'between time', [$dateStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(`createtime`,'%Y-%m-%d') AS day, COUNT(*) AS num")
            ->group('day')
            ->select();
        foreach ($posts as $row) {
            $postsMap[$row['day']] = (int)$row['num'];
        }

        // 每天订单额（已支付；paytime 为空时按 createtime 归属）
        $ordersMap = [];
        $orders = Db::name('fc_order')
            ->where('status', 'paid')
            ->whereTime('paytime|createtime', 'between', [$dateStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(IFNULL(`paytime`,`createtime`),'%Y-%m-%d') AS day, SUM(`amount`) AS num")
            ->group('day')
            ->select();
        foreach ($orders as $row) {
            $ordersMap[$row['day']] = round((float)$row['num'], 2);
        }

        // 每天新增注册用户（fa_user.createtime）
        $membersMap = [];
        $members = Db::name('user')
            ->where('createtime', 'between time', [$dateStart, $todayEnd])
            ->fieldRaw("FROM_UNIXTIME(`createtime`,'%Y-%m-%d') AS day, COUNT(*) AS num")
            ->group('day')
            ->select();
        foreach ($members as $row) {
            $membersMap[$row['day']] = (int)$row['num'];
        }

        /* ---------- 今日较昨日的变化（用于首页涨跌标识） ---------- */
        $yesterday                  = date('Y-m-d', $todayStart - 86400);
        $metrics['yesterdayPost']   = isset($postsMap[$yesterday]) ? $postsMap[$yesterday] : 0;
        $metrics['yesterdayOrder']  = isset($ordersMap[$yesterday]) ? $ordersMap[$yesterday] : 0;
        $metrics['postDelta']       = $metrics['todayPost'] - $metrics['yesterdayPost'];
        $metrics['orderDelta']      = round($metrics['todayOrderAmount'] - $metrics['yesterdayOrder'], 2);

        $trend = [
            'dates'   => $days,
            'posts'   => [],
            'orders'  => [],
            'members' => [],
        ];
        $trendRows = [];
        foreach ($days as $day) {
            $postNum   = isset($postsMap[$day]) ? $postsMap[$day] : 0;
            $orderNum  = isset($ordersMap[$day]) ? $ordersMap[$day] : 0;
            $memberNum = isset($membersMap[$day]) ? $membersMap[$day] : 0;

            $trend['posts'][]   = $postNum;
            $trend['orders'][]  = $orderNum;
            $trend['members'][] = $memberNum;

            $trendRows[] = [
                'date'    => $day,
                'posts'   => $postNum,
                'orders'  => $orderNum,
                'members' => $memberNum,
            ];
        }

        $this->view->assign('metrics', $metrics);
        $this->view->assign('trendRows', $trendRows);
        $this->view->assign('updatedAt', date('Y-m-d H:i'));
        $this->assignconfig('trend', $trend);

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