<?php
/**
 * Created by PhpStorm.
 * User: Elton
 * Date: 2020/8/7
 * Time: 21:23
 * 清水小说
 */

namespace app\common\service;


use app\common\library\Ip;
use app\common\library\Redis;
use app\main\constants\CacheConstants;
use think\Config;

class WaterBookService extends BaseService
{
    private static $self;

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

        return self::$self;
    }

    /**
     * 校验展示给用户小说类型(清水 | 默认)
     * @param $channel_id
     * @param $uid
     * @param string $ip
     * @return bool (TRUE =>清水  FALSE=> 默认)
     */
    public function showBook($channel_id, $uid='', $ip='')
    {
        LogService::info('WaterBookService:params:channel_id:' . $channel_id . ',uid:' . $uid . ',IP:' . $ip);
        $white_uids = array_filter(explode(',', Config::get('site.white_water_uids')));
        if ($white_uids && in_array($uid, $white_uids)) {
            LogService::info('WaterBookService:params:清水书籍白名单用户');
            return false;
        }
        
        $result = false;
        // 读取Hash中的规则
        $waterRule = array_filter(Redis::instance()->hMGet(CacheConstants::LIGHT_RULE, ['*', $channel_id]));
        if($waterRule){

            // 所有城市CODE
            $aim_city = [];

            foreach ($waterRule as $k=>$item)
            {
                $item_arr = json_decode($item, true);
                $waterRule[$k] = $item_arr['c'] ?? '';
            }
            $waterRule = array_filter($waterRule);

            // 判断 * 的情况
            if (!empty($waterRule['*'])) {
                if ($waterRule['*'] == '*') {
                    LogService::info('WaterBookService:params:清水，*命中');
                    return true;
                } else {
                    $aim_city = array_merge($aim_city, explode(',', $waterRule['*']));
                }
            }

            // 校验渠道是否开启了清水
            if (!empty($waterRule[$channel_id])) {
                if ($waterRule[$channel_id] == '*') {
                    LogService::info('WaterBookService:params:清水，渠道城市为*命中');
                    return true;
                } else {
                    $aim_city = array_merge($aim_city, explode(',', $waterRule[$channel_id]));
                }
            }

            $aim_city = array_unique(array_filter($aim_city));

            if (!empty($ip)) {
                // ip 不为空，解析为 城市code
                $cityCode = Ip::citycode($ip);
                // 判断城市是否清水
                if (in_array($cityCode, $aim_city)) {
                    LogService::info('WaterBookService:params:清水，根据城市命中');
                    return true;
                }
            }else{
                // 没有IP参数，说明是微信回调过来的，前台页面进来都需要传IP
                if(!empty($aim_city)){
                    LogService::info('WaterBookService:params:微信回调，根据城市命中');
                    // 微信回调，只要有匹配的城市，返回清水 TRUE
                    return true;
                }
            }
        }

        if (!empty($uid)) {
            // uid 不为空，判断是否有uid 限制
            $water_uids = Config::get('site.water_uids');
            if (in_array($uid, explode(',', $water_uids))) {
                LogService::info('WaterBookService:params:清水，根据uid命中');
                return true;
            }
        }
        return $result;
    }

}