<?php
/**
 * Created by PhpStorm.
 * User: Elton
 * Date: 2019/9/7
 * Time: 11:39
 */

namespace app\common\service;


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

class GussNovelService
{
    private static $self;

    public static function instance()
    {
        if(self::$self == null){
            self::$self = new self();
        }
        return self::$self;
    }

    public function getNovelEndRecommendModel(){
        return model('NovelEndRecommend');
    }

    /**
     * 猜猜你喜欢，获取书籍
     * @param string $sex 性别  0=未知,1=男性,2=女性
     * @param int $num 书籍数量
     * @return array|false|mixed|\PDOStatement|string|\think\Collection
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public function getLikedNovels($sex = '1', $num = 4,$isWater=false)
    {
        $novelsFileCacheKey = $isWater ? 'NFCK:W:' . $sex : 'NFCK:' . $sex;
        if ($novels = Cache::get($novelsFileCacheKey)) {
            if ($novels === 1) {
                LogService::info('novels_file缓存命中,内容空');
                return [];
            } else {
                LogService::info('novels_file缓存命中');
                return $novels;
            }
        }

        $novels = $this->getNovelEndRecommendModel()->getBooksBySex($sex,$isWater);
        // 今日阅读数
        $bookNumKey = 'B-N';
        // 获取测书书库中书籍ids
        $novelsBookIds = [];
        $data = [];
        if ( !empty( $novels ) ) {
            $novelsBookIds = array_column( $novels, 'book_id' );
            $books = model('Book')->getBooksInfo( $novelsBookIds );
            $booksInfo = [];
            if( !empty($books) ){
                foreach ($books as $k => $v){
                    // 如果书籍已经入库，则不显示
                    if($v['state'] != -1){
                        $booksInfo[$v['id']] = $v;
                    }
                }
            }
            foreach ($novels as $key=>$book) {
                //没有bookInfo 的去掉
                if ( !isset( $booksInfo[$book['book_id']] ) ){
                    continue;
                }
                $bookInfo = $booksInfo[$book['book_id']];
                $book = array_merge($book, $bookInfo);
                $data[] = $book;
            }

        }
        // B-N + read_num
        // 根据阈值去重， 书籍点击率大于推荐书籍阈值，剔除
//        if ($novels) {
//            foreach ($novels as $key=>$book) {
//                // 排重
//                if($book_id == $book['book_id']){
//                    unset($novels[$key]);
//                }
//                if(($book['read_num'] + $book['bn_num']) >= $book['click_threshold']){
//                    unset($novels[$key]);
//                }
//            }
//        }
        if ($data) {
            //wudd  跟阅读记录过滤互斥书籍
//            $data = BookRelationService::instance()->filterLikeBookRelation($data, $num);
            $data = array_slice($data, 0, $num);
        }
        if ($data && !empty($data)) {
            LogService::info('novels_redis缓存命中');
            cache::set($novelsFileCacheKey, $data, 600);
        } else {
            LogService::info('novels_redis缓存命中,内容空');
            cache::set($novelsFileCacheKey, 1, 600);
        }

        return $data;
    }


    /**
     * 将数组中的某个值作为KEY
     * @param $arr
     * @param $keyname
     * @return array
     */
    private function _convertArr($arr, $keyname)
    {
        $res = [];
        if ($arr && is_array($arr)) {
            foreach ($arr as $key => $item) {
                $res[$item[$keyname]] = $item;
            }
        }
        return $res;
    }

}