<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2018/12/13
 * Time: 下午4:59
 */

namespace app\main\service;

use app\common\library\Redis;
use app\common\library\Ssdb;
use app\common\model\UserCollect;
use app\main\constants\AdminConstants;
use app\main\constants\ApiConstants;
use app\main\constants\CacheConstants;
use app\main\constants\UserConstants;
use app\main\helper\ArrayHelper;
use app\main\helper\NumberHelper;
use app\main\helper\StringHelper;

/**
 * 用户统计分析
 * Class UserCollectService
 * @package app\main\service
 */
class UserCollectService extends BaseService
{

    protected $default = [
        'follow'                  => 0,
        'recharge'                => 0,
        'increase'                => 0,
        'increase_m'              => 0,
        'increase_f'              => 0,
        'increase_fllow'          => 0,
        'increase_recharge'       => 0,
        'unfollow_num'            => 0,
        'net_follow_num'          => 0,
        'day_recharge_user_money' => 0,
        'day_recharge_user_count' => 0,
    ];

    protected $replaceFields = [
        'adminId'              => 'admin_id',
        'increaseM'            => 'increase_m',
        'increaseF'            => 'increase_f',
        'increaseFllow'        => 'increase_fllow',
        'unfollowNum'          => 'unfollow_num',
        'netFollowNum'         => 'net_follow_num',
        'increaseRecharge'     => 'increase_recharge',
        'dayRechargeUserCount' => 'day_recharge_user_count',
        'dayRechargeUserMoney' => 'day_recharge_user_money',
        'date'                 => 'createdate',
    ];

    /**
     * @var UserCollectService
     */
    protected static $self = NULL;

    /**
     * @return UserCollectService
     */
    public static function instance()
    {
        if (self::$self == NULL) {
            self::$self = new self();
        }

        return self::$self;
    }


    /**
     * @return UserCollect
     */
    public function getUserCollectModel()
    {
        return model('UserCollect');
    }

    /**
     * 获取今日数据
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getMigrateTodayData($admin_id)
    {
        $default = $this->default;
        $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_USER_TODAY, ['adminId' => $admin_id])->data;
        if (!$data) {
            return $this->setData($default)->getReturn();
        }
        $replaceFields = $this->replaceFields;
        $data = ArrayHelper::array_replace_key($data, $replaceFields);
        $data = array_merge($default, $data);
        return $this->setData($data)->getReturn();
    }

    /**
     * 获取今天的用户统计数据
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectToday($admin_id)
    {
        $admin_id = (array)AdminService::instance()->getAdminId($admin_id)->data;
        $default = $this->default;
        $fields = [
            'IFNULL(SUM(increase),0)'          => 'increase',
            'IFNULL(SUM(increase_m),0)'        => 'increase_m',
            'IFNULL(SUM(increase_f),0)'        => 'increase_f',
            'IFNULL(SUM(increase_fllow),0)'    => 'increase_fllow',
            'IFNULL(SUM(increase_recharge),0)' => 'increase_recharge',
            'IFNULL(SUM(guide_follow_num),0)'  => 'guide_follow_num',
            'IFNULL(SUM(unfollow_num),0)'      => 'unfollow_num',
            'IFNULL(SUM(net_follow_num),0)'    => 'net_follow_num',
            'IFNULL(SUM(day_recharge_user_money),0)'    => 'day_recharge_user_money',
            'IFNULL(SUM(day_recharge_user_count),0)'    => 'day_recharge_user_count',
        ];
        try {
            //取数据库数据
            $where = [
                'type'       => UserConstants::USER_COLLECT_TYPE_DAY,
                'createdate' => date('Ymd', time()),
                'admin_id'   => ['in', $admin_id],
            ];
            $data = $this->getUserCollectModel()
                ->where($where)
                ->field($fields)
                ->find()
                ->toArray();
            if ($data) {
                if ($data['increase']) {
                    $data['follow'] = NumberHelper::getFloat($data['increase_fllow'] * 100 / $data['increase']);
                    $data['recharge'] = NumberHelper::getFloat($data['increase_recharge'] * 100 / $data['increase']);
                    $data['guide_follow_num_percent'] = NumberHelper::getFloat($data['guide_follow_num'] * 100 / $data['increase']);
                    $data['unfollow_num_percent'] = NumberHelper::getFloat($data['unfollow_num'] * 100 / $data['increase']);
                    $data['net_follow_num_percent'] = NumberHelper::getFloat($data['net_follow_num'] * 100 / $data['increase']);
                } else {
                    $data['follow'] = 0;
                    $data['recharge'] = 0;
                    $data['guide_follow_num_percent'] = 0;
                    $data['unfollow_num_percent'] = 0;
                    $data['net_follow_num_percent'] = 0;
                }
            } else {
                $data = $default;
            }

            $pay = intval($data['increase_recharge'] ?? 0);
            //算 支付比例
            if ($pay && $data['increase']) {
                $data['recharge'] = round($pay * 100 / $data['increase'], 2);
            }

            return $this->setData($data)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData($default)->getReturn();
        }
    }

    /**
     * 获取昨日统计数据
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectYesterday($admin_id)
    {
        $admin_id = (array)AdminService::instance()->getAdminId($admin_id)->data;
        $default = $this->default;
        $fields = [
            'IFNULL(SUM(increase),0)'          => 'increase',
            'IFNULL(SUM(increase_m),0)'        => 'increase_m',
            'IFNULL(SUM(increase_f),0)'        => 'increase_f',
            'IFNULL(SUM(increase_fllow),0)'    => 'increase_fllow',
            'IFNULL(SUM(increase_recharge),0)' => 'increase_recharge',
            'IFNULL(SUM(guide_follow_num),0)'  => 'guide_follow_num',
            'IFNULL(SUM(unfollow_num),0)'      => 'unfollow_num',
            'IFNULL(SUM(net_follow_num),0)'    => 'net_follow_num',
            'IFNULL(SUM(day_recharge_user_money),0)'    => 'day_recharge_user_money',
            'IFNULL(SUM(day_recharge_user_count),0)'    => 'day_recharge_user_count',
        ];
        try {
            $where = [
                'type'       => UserConstants::USER_COLLECT_TYPE_DAY,
                'createdate' => date('Ymd', strtotime('-1 days')),
                'admin_id'   => ['in', $admin_id],
            ];
            $data = $this->getUserCollectModel()
                ->where($where)
                ->whereIn('admin_id', $admin_id)
                ->field($fields)
                ->find()
                ->toArray();

            if (!$data) {
                $data = $default;
            }

            return $this->setData($data)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData($default)->getReturn();
        }
    }

    /**
     * 获取月度统计数据
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectMonth($admin_id)
    {
        $admin_id = (array)AdminService::instance()->getAdminId($admin_id)->data;
        $default = $this->default;
        $fields = [
            'IFNULL(SUM(increase),0)'          => 'increase',
            'IFNULL(SUM(increase_m),0)'        => 'increase_m',
            'IFNULL(SUM(increase_f),0)'        => 'increase_f',
            'IFNULL(SUM(increase_fllow),0)'    => 'increase_fllow',
            'IFNULL(SUM(increase_recharge),0)' => 'increase_recharge',
            'IFNULL(SUM(guide_follow_num),0)'  => 'guide_follow_num',
            'IFNULL(SUM(unfollow_num),0)'      => 'unfollow_num',
            'IFNULL(SUM(net_follow_num),0)'    => 'net_follow_num',
            'IFNULL(SUM(day_recharge_user_money),0)'    => 'day_recharge_user_money',
            'IFNULL(SUM(day_recharge_user_count),0)'    => 'day_recharge_user_count',
        ];
        try {
            $where = [
                'type'     => UserConstants::USER_COLLECT_TYPE_DAY,
                'admin_id' => ['in', $admin_id],
            ];
            $data = $this->getUserCollectModel()
                ->where($where)
                ->where("createdate>=" . date('Ym') . "01")
                ->where("createdate<=" . date('Ymd', strtotime('-1 days')))
                ->field($fields)
                ->find()
                ->toArray();

            if (!$data) {
                $data = $default;
            }

            return $this->setData($data)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData($default)->getReturn();
        }
    }

    /**
     * 获取总数据
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getTotalData($admin_id)
    {
        $admin_id = (array)AdminService::instance()->getAdminId($admin_id)->data;
        $default = $this->default;
        $fields = [
            'IFNULL(SUM(increase),0)'          => 'increase',
            'IFNULL(SUM(increase_m),0)'        => 'increase_m',
            'IFNULL(SUM(increase_f),0)'        => 'increase_f',
            'IFNULL(SUM(increase_fllow),0)'    => 'increase_fllow',
            'IFNULL(SUM(increase_recharge),0)' => 'increase_recharge',
            'IFNULL(SUM(guide_follow_num),0)'  => 'guide_follow_num',
            'IFNULL(SUM(unfollow_num),0)'      => 'unfollow_num',
            'IFNULL(SUM(net_follow_num),0)'    => 'net_follow_num',
            'IFNULL(SUM(day_recharge_user_money),0)'    => 'day_recharge_user_money',
            'IFNULL(SUM(day_recharge_user_count),0)'    => 'day_recharge_user_count',
        ];
        try {
            $where = [
                'type'     => UserConstants::USER_COLLECT_TYPE_DAY,
                'admin_id' => ['in', $admin_id],
            ];
            $data = $this->getUserCollectModel()
                ->field($fields)
                ->where($where)
                ->where("createdate<=" . date('Ymd', strtotime('-1 days')))
                ->find()
                ->toArray();

            if (!$data) {
                $data = $default;
            }

            return $this->setData($data)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData($default)->getReturn();
        }
    }

    /**
     * 获取渠道30日数据
     * @param $admin_id
     * @param $where
     * @param $sort
     * @param $order
     * @param $offset
     * @param $limit
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectDateListData($admin_id, $where = '', $sort = 'createdate', $order = 'desc', $offset = 0, $limit = 10, $group = AdminConstants::ADMIN_GROUP_ID_CHANNEL)
    {
        try {
            $total = 0;
            $list = [];
            if ($group == AdminConstants::ADMIN_GROUP_ID_SUPER_ADMIN) {
                $admin_id = 0;
            }
            if (VisitLimitService::instance()->checkMigratedV2()) {
                $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_USER_TOTAL, ['adminId' => $admin_id])->data;
                if ($data) {
                    $list = [];
                    foreach ($data['thirty'] as $item) {
                        if ($item['date'] == date('Ymd')) {
                            continue;
                        }

                        $date = ArrayHelper::array_replace_key($item, $this->replaceFields);
                        $list[] = array_merge($this->default, $date);
                    }

                    usort($list, function($v1, $v2){
                        return $v1['createdate'] < $v2['createdate'];
                    });

                    $total = count($list);
                    $list = array_slice($list, $offset, $limit);
                }
            } else {
                $beginDate = date('Ymd', strtotime('-31 days'));
                $endDate = date('Ymd', strtotime('-1 days'));
                $total = $this->getUserCollectModel()
                    ->where($where)
                    ->where('admin_id', $admin_id)
                    ->where('createdate', '>=', $beginDate)
                    ->where('createdate', '<=', $endDate)
                    ->where(['type' => UserConstants::USER_COLLECT_TYPE_DAY])
                    ->count();

                //总的数据
                $list = $this->getUserCollectModel()
                    ->where($where)
                    ->where('admin_id', $admin_id)
                    ->where(['type' => UserConstants::USER_COLLECT_TYPE_DAY])
                    ->where('createdate', '>=', $beginDate)
                    ->where('createdate', '<=', $endDate)
                    ->order($sort, $order)
                    ->limit($offset, $limit)
                    ->select();
            }

            $result = ["total" => $total, "rows" => $list];
            return $this->setData($result)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData([
                'total' => 0,
                'rows'  => [],
            ])->getReturn();
        }
    }

    /**
     * 获取VIP30日数据汇总
     * @param $admin_id
     * @param int $offset
     * @param int $limit
     * @return \app\main\model\object\ReturnObject
     */
    public function getMigratedUserCollectDateAggsListData($admin_id, $offset = 0, $limit = 10)
    {
        $total = 0;
        $list = [];
        $admin_ids = (array)AdminService::instance()->getAdminId($admin_id)->data;
        if ($admin_ids != [-1]) {
            $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_VIP_USER_TOTAL, ['ids' => $admin_ids])->data;
            if ($data) {
                $list = [];
                foreach ($data['thirty'] as $item) {
                    if ($item['date'] == date('Ymd')) {
                        continue;
                    }

                    $date = ArrayHelper::array_replace_key($item, $this->replaceFields);
                    $list[] = array_merge($this->default, $date);
                }

                usort($list, function ($v1, $v2) {
                    return $v1['createdate'] < $v2['createdate'];
                });

                $total = count($list);
                $list = array_slice($list, $offset, $limit);
            }
        }

        $result = ["total" => $total, "rows" => $list];
        return $this->setData($result)->getReturn();
    }

    /**
     * @param $admin_id
     * @param $where
     * @param $sort
     * @param $order
     * @param $offset
     * @param $limit
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectDateAggsListData($admin_id, $offset = 0, $limit = 10)
    {
        $fields = [
            'IFNULL(SUM(increase),0)'                => 'increase',
            'IFNULL(SUM(increase_m),0)'              => 'increase_m',
            'IFNULL(SUM(increase_f),0)'              => 'increase_f',
            'IFNULL(SUM(increase_fllow),0)'          => 'increase_fllow',
            'IFNULL(SUM(increase_recharge),0)'       => 'increase_recharge',
            'IFNULL(SUM(guide_follow_num),0)'        => 'guide_follow_num',
            'IFNULL(SUM(unfollow_num),0)'            => 'unfollow_num',
            'IFNULL(SUM(net_follow_num),0)'          => 'net_follow_num',
            'IFNULL(SUM(day_recharge_user_money),0)' => 'day_recharge_user_money',
            'IFNULL(SUM(day_recharge_user_count),0)' => 'day_recharge_user_count',
            'DATE_FORMAT(createdate,"%Y-%m-%d")'     => 'createdate',
        ];
        try {
            $total = 0;
            $list = [];
            $admin_id = (array)AdminService::instance()->getAdminId($admin_id)->data;
            if ($admin_id != [-1]) {
                $beginDate = date('Ymd', strtotime('-31 days'));
                $endDate = date('Ymd', strtotime('-1 days'));
                $total = $this->getUserCollectModel()
                    ->whereIn('admin_id', $admin_id)
                    ->where('createdate', '>=', $beginDate)
                    ->where('createdate', '<=', $endDate)
                    ->where(['type' => UserConstants::USER_COLLECT_TYPE_DAY])
                    ->group('createdate')
                    ->count();

                //总的数据
                $list = $this->getUserCollectModel()
                    ->whereIn('admin_id', $admin_id)
                    ->where(['type' => UserConstants::USER_COLLECT_TYPE_DAY])
                    ->where('createdate', '>=', $beginDate)
                    ->where('createdate', '<=', $endDate)
                    ->order('createdate', 'desc')
                    ->limit($offset, $limit)
                    ->group('createdate')
                    ->field($fields)
                    ->select();

                foreach ($list as $key => $val) {
                    if ($val['increase']) {
                        $list[$key]['follow'] = NumberHelper::getFloat($val['increase_fllow']/ $val['increase']* 100);
                        $list[$key]['recharge'] = NumberHelper::getFloat($val['increase_recharge']/ $val['increase']* 100);
                        $list[$key]['guide_follow_num_percent'] = NumberHelper::getFloat($val['guide_follow_num']/ $val['increase']* 100);
                        $list[$key]['unfollow_num_percent'] = NumberHelper::getFloat($val['unfollow_num']/ $val['increase']* 100);
                        $list[$key]['net_follow_num_percent'] = NumberHelper::getFloat($val['net_follow_num']/ $val['increase']* 100);
                    } else {
                        $list[$key]['follow'] = 0;
                        $list[$key]['recharge'] = 0;
                        $list[$key]['guide_follow_num_percent'] = 0;
                        $list[$key]['unfollow_num_percent'] = 0;
                        $list[$key]['net_follow_num_percent'] = 0;
                    }
                }
            }

            $result = ["total" => $total, "rows" => $list];
            return $this->setData($result)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData([
                'total' => 0,
                'rows'  => [],
            ])->getReturn();
        }
    }

    /**
     * 获取指定渠道今日数据
     * @param $admin_ids
     * @return \app\main\model\object\ReturnObject
     */
    public function getMigrateUserCollectChannelListDetail($admin_ids)
    {
        $list = [];
        $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_VIP_USER_TODAY, ['ids' => $admin_ids])->data;
        $admins = AdminService::instance()->getAdminConfigModel()->field([
            'replace(JSON_EXTRACT(json,"$.authorizer_info.nick_name"),\'"\',\'\')' => 'wx_nickname',
            'admin_id'                                                             => 'admin_id',
        ])->whereIn('admin_id', $admin_ids)->select();
        $names = [];
        foreach ($admins as $admin) {
            $names[$admin['admin_id']] = $admin['wx_nickname'];
        }
        foreach ($data as $item) {
            $date = ArrayHelper::array_replace_key($item, $this->replaceFields);
            if (array_key_exists($item['adminId'], $names) && $names[$item['adminId']]) {
                $date['wx_nickname'] = $names[$item['adminId']];
                $list[] = array_merge($this->default, $date);
            }
        }

        return $this->setData($list)->getReturn();
    }

    /**
     * 获取单页渠道数据
     * @param $admin_id
     * @param int $offset
     * @param int $limit
     * @return \app\main\model\object\ReturnObject
     */
    public function getMigrateUserCollectChannelList($admin_id, $offset = 0, $limit = 10)
    {
        $admin_ids = (array)AdminService::instance()->getAdminId($admin_id)->data;
        //手动分页
        $filterIds = array_slice($admin_ids, $offset, $limit);
        $result = $this->getMigrateUserCollectChannelListDetail($filterIds)->data;
        $total = count($result);
        $result = ["total" => $total, "rows" => $result];
        return $this->setData($result)->getReturn();
    }

    /**
     * 获取渠道商今日用户统计
     * @param $admin_id
     * @param $offset
     * @param $limit
     * @return \app\main\model\object\ReturnObject
     */
    public function getUserCollectChannelList($admin_id, $offset = 0, $limit = 10)
    {
        try {
            $admin_ids = (array)AdminService::instance()->getAdminId($admin_id)->data;
            $today = date('Ymd');
            //查询总数量
            $total = AdminService::instance()->getAdminConfigModel()
                ->join('user_collect',
                    "user_collect.admin_id = admin_config.admin_id and user_collect.type = 1 and createdate = '$today'", 'left')
                ->where(['admin_config.admin_id' => ['in', $admin_ids]])
                ->count();
            #region 从数据库中取出列表数据
            $list = AdminService::instance()->getAdminConfigModel()
                ->join('user_collect',
                    "user_collect.admin_id = admin_config.admin_id and user_collect.type = 1 and createdate = '$today'", 'left')
                ->where(['admin_config.admin_id' => ['in', $admin_ids]])
                ->field([
                    'replace(JSON_EXTRACT(admin_config.json,"$.authorizer_info.nick_name"),\'"\',\'\')' => 'wx_nickname',
                    'admin_config.admin_id'                                                             => 'admin_id',
                    'increase',
                    'increase_m',
                    'increase_f',
                    'increase_fllow',
                    'increase_recharge',
                    'guide_follow_num',
                    'unfollow_num',
                    'net_follow_num',
                    'day_recharge_user_money',
                    'day_recharge_user_count',
                ])
                ->limit($offset, $limit)
                ->select();

            $result = [];
            foreach ($list as $item) {
                $tmp = [
                    'wx_nickname'       => $item['wx_nickname'],
                    'admin_id'          => $item['admin_id'],
                    'increase'          => (int)$item['increase'],
                    'increase_m'        => (int)$item['increase_m'],
                    'increase_f'        => (int)$item['increase_f'],
                    'increase_fllow'    => (int)$item['increase_fllow'],
                    'increase_recharge' => (int)$item['increase_recharge'],
                    'guide_follow_num'  => (int)$item['guide_follow_num'],
                    'unfollow_num'      => (int)$item['unfollow_num'],
                    'net_follow_num'    => (int)$item['net_follow_num'],
                    'day_recharge_user_count'    => (int)$item['day_recharge_user_count'],
                    'day_recharge_user_money'    => (float)$item['day_recharge_user_money'],
                ];
                $result[] = $tmp;
            }

            $result = ["total" => $total, "rows" => $result];
            return $this->setData($result)->getReturn();
        } catch (\Exception $e) {
            LogService::exception($e);
            return $this->setData([])->getReturn();
        }
    }

    /**
     * 获取渠道-VIP-admin数据汇总-新
     * @param $admin_id
     * @param $group
     * @return \app\main\model\object\ReturnObject
     */
    public function getMigrateCollectData($admin_id, $group)
    {
        $default = $this->default;
        $result = [
            'todayData'     => $default,
            'yesterdayData' => $default,
            'totalData'     => $default,
            'monthData'     => $default,
        ];
        $replaceFields = $this->replaceFields;
        //超管按照单渠道数据统计
        if (in_array($group, [AdminConstants::ADMIN_GROUP_ID_SUPER_ADMIN])) {
            $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_USER_TOTAL, ['adminId' => 0])->data;
        } else {
            //获取关联的渠道
            $admin_ids = (array)AdminService::instance()->getAdminId($admin_id)->data;
            //没有关联渠道直接返回默认值
            if ($admin_ids == [-1]) {
                return $this->setData($result)->getReturn();
            }
            //渠道数据为1则按照渠道数据查询
            if (count($admin_ids) == 1) {
                $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_USER_TOTAL, ['adminId' => $admin_ids[0]])->data;
                //多个渠道按照渠道数据汇总
            } else {
                $data = ApiService::instance()->getCollectFromApi(ApiConstants::API_VIP_USER_TOTAL, ['ids' => $admin_ids])->data;
            }
        }

        if ($data) {
            $all = ArrayHelper::array_replace_key($data['all'], $replaceFields);
            $result['totalData'] = array_merge($default, $all);
            $month = ArrayHelper::array_replace_key($data['month'], $replaceFields);
            $result['monthData'] = array_merge($default, $month);
            if (!empty($data['thirty'])) {
                foreach ($data['thirty'] as $date) {
                    if ($date['date'] == date('Ymd')) {
                        $date = ArrayHelper::array_replace_key($date, $replaceFields);
                        $result['todayData'] = array_merge($default, $date);
                    }else if ($date['date'] == date('Ymd', time() - 86400)) {
                        $date = ArrayHelper::array_replace_key($date, $replaceFields);
                        $result['yesterdayData'] = array_merge($default, $date);
                    }
                }
            }
        }

        return $this->setData($result)->getReturn();
    }

    /**
     * 获取渠道-VIP-admin汇总数据-旧
     * @param $admin_id
     * @return \app\main\model\object\ReturnObject
     */
    public function getCollectData($admin_id)
    {
        $return = [];
        $return['totalData'] = UserCollectService::instance()->getTotalData($admin_id)->data;

        $return['todayData'] = UserCollectService::instance()->getUserCollectToday($admin_id)->data;

        $return['yesterdayData'] = UserCollectService::instance()->getUserCollectYesterday($admin_id)->data;

        $return['monthData'] = UserCollectService::instance()->getUserCollectMonth($admin_id)->data;

        return $this->setData($return)->getReturn();
    }
}