<?php

namespace app\common\model;

use think\Model;
use app\common\library\Redis;

class SignRecommand extends Model
{
    // 表名
    protected $table = 'sign_recommand';
    
    // 自动写入时间戳字段
    protected $autoWriteTimestamp = 'int';

    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = 'updatetime';
    
    // 追加属性
    protected $append = [
        'sex_text',
        'status_text'
    ];
    
    public function getSexList()
    {
        return ['1' => __('Sex 1'),'2' => __('Sex 2')];
    }     

    public function getStatusList()
    {
        return ['normal' => __('Normal'),'hidden' => __('Hidden')];
    }     


    public function getSexTextAttr($value, $data)
    {        
        $value = $value ? $value : $data['sex'];
        $list = $this->getSexList();
        return isset($list[$value]) ? $list[$value] : '';
    }


    public function getStatusTextAttr($value, $data)
    {        
        $value = $value ? $value : $data['status'];
        $list = $this->getStatusList();
        return isset($list[$value]) ? $list[$value] : '';
    }

    /**
     * 根据性别获取推荐书籍
     * @param bool $sex 1 = 男 , 2 = 女
     * @return false|mixed|\PDOStatement|string|\think\Collection
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public function getBooksBySex($sex = '1',$limit=3,$isWater=false){
        $redis = Redis::instance();
        $key = $isWater ? 'SRB:W:'.$sex :'SRB:'.$sex;
        $waterWhere = $isWater ? ' and classify_white_list=1' : '';
        if(!$redis->exists($key)){
            $obj = $this->alias('sr')->where(['sr.status'=>'normal','sr.sex'=>$sex]);
            $obj->join('book','book.id=book_id and book.state=1'.$waterWhere,'inner');
            $source = $obj->select();
            if(empty($source)){
                return null;
            }
            foreach($source as $item){
                $redis->sadd($key,$item['book_id'].':'.$item['book_name']);
            }
            $redis->expire($key,900);
            if(count($source) >= $limit){
                shuffle($source);
                return array_slice($source,0,$limit);
            }
            return $source;
        }else{
            $data = array();
            $source = $redis->srandmember($key,$limit);
            foreach($source as $item){
                $map = explode(':',$item);
                array_push($data,['book_id'=>array_shift($map),'book_name'=>implode($map)]);
            }
            return $data;
        }
    }


}