<?php

namespace App\Models\Post;

use App\Exceptions\ModelException;
use App\Models\Base\BaseModel;
use App\Models\Customer\CustomerUserExtendModel;
use App\Models\Follow\FollowModel;
use App\Tools\CollectOffsetLimit;

class PostPushBoxModel extends BaseModel
{

    protected $table = 'customer_post_push_box';
    protected $primaryKey = 'id';
    protected $fillable = [
        'id',
        'uid',
        'pid',
        'puuid',
        'is_like',
        'is_repost',
        'is_bookmark',
        'is_read',
        'created_at',
        'created_box_at',
        'deleted_at',
    ];

    const IS_LIKE_DEFAULT = 1;
    const IS_LIKE_YES = 2;
    const IS_LIKE_NO = 3;
    const IS_LIKE = [
        self::IS_LIKE_DEFAULT => '默认',
        self::IS_LIKE_YES => '喜欢',
        self::IS_LIKE_NO => '不喜欢',
    ];

    const IS_REPOST_DEFAULT = 1;
    const IS_REPOST_YES = 2;
    const IS_REPOST = [
        self::IS_REPOST_DEFAULT => '默认',
        self::IS_REPOST_YES => '已转发',
    ];

    const IS_BOOKMARK_DEFAULT = 1;
    const IS_BOOKMARK_YES = 2;
    const IS_BOOKMARK = [
        self::IS_BOOKMARK_DEFAULT => '默认',
        self::IS_BOOKMARK_YES => '已收藏',
    ];

    const IS_READ_DEFAULT = 1;
    const IS_READ_YES = 2;
    const IS_READ = [
        self::IS_READ_DEFAULT => '默认',
        self::IS_READ_YES => '已收藏',
    ];


    /**
     * 提交后调用事件
     * @throws ModelException
     */
    function newPostPushTask($id = null, $uuid = null)
    {
        $oPostModel = new PostModel();
        $oPost = null;
        if ($id) $oPost = $oPostModel->findItem($id);
        if ($uuid) $oPost = $oPostModel->findItemByWhere(['uuid' => $uuid]);
        if (!$oPost) throw new ModelException('post not found');
        $iConfigFansPushLimit = intval(env('CONFIG_FANS_PUSH_LIMIT', 2000));

        //查询粉丝数
        $CustomerUserExtendModel = new CustomerUserExtendModel();
        $CustomerUserExtend = $CustomerUserExtendModel->findItem($oPost->uid);
        if (!$CustomerUserExtend) throw new ModelException('user extend not found');

        //粉丝数少于$iConfigFansPushLimit的用户走写扩散流程（所有粉丝信箱插入一条）
        $bSendMode = $CustomerUserExtend->fans_num < $iConfigFansPushLimit;

        $iTotalCount = $this->countSendFans($bSendMode, $oPost->uid);   //计算发送总数
        //分批发送
        $oCollectOffsetLimit = new CollectOffsetLimit();
        $oCollectOffsetLimit->setITotalCount($iTotalCount)->runWhile(function ($offset, $limit) use ($oPost, $bSendMode) {
            $oFollowList = $this->getFansListWithPage($bSendMode, $oPost->uid, $offset, $limit);
            $this->sendPostToBox($oPost, $oFollowList);
        });

    }

    function getFansListWithPage($bAllFans, $uid, $offset = 0, $limit = 2000): \Illuminate\Database\Eloquent\Collection|array|\Illuminate\Support\Collection
    {
        $oFollowModel = new FollowModel();
        //粉丝数少于$iConfigFansPushLimit的用户走写扩散流程（所有粉丝信箱插入一条）
        if ($bAllFans) {
            $oFollowList = $oFollowModel->getFansList($uid, ['uid'], $offset, $limit);   //获取所有粉丝列表
        } else {  //读扩散流程（只针对活跃粉丝信箱插入一条）
            //获取活跃粉丝列表
            //@活跃粉丝数量过大需要分批处理
            $oFollowList = $oFollowModel->getActiveFansUidList($uid, ['a.uid'], $offset, $limit);
        }
        return $oFollowList;
    }

    function countSendFans($bAllFans, $uid): int
    {
        $oFollowModel = new FollowModel();
        if ($bAllFans) {
            $iCount = $oFollowModel->getFansCount($uid);   //获取所有粉丝列表
        } else {  //读扩散流程（只针对活跃粉丝信箱插入一条）
            //获取活跃粉丝列表
            $iCount = $oFollowModel->getActiveFansUidListCount($uid);
        }
        return $iCount;
    }

    //发送到推送信箱
    function sendPostToBox($oPost, $oFollowList): void
    {
        if (!$oFollowList) return;
        $date = date('Y-m-d H:i:s');
        foreach ($oFollowList as $oFollow) {
            $aItem['uid'] = $oFollow->uid;
            $aItem['pid'] = $oPost->id;
            $aItem['puuid'] = $oPost->uuid;
            $aItem['created_at'] = $oPost->created_at;
            $aItem['created_box_at'] = $date;
            $this->addItem($aItem);
        }
    }


    /**
     * 拉取推送信箱列表
     * @param $uid
     * @param $last_id //上次最后一条id
     * @param $limit
     * @return \Illuminate\Database\Eloquent\Collection|array
     */
    function getPushBoxList($uid, $last_id = 0, $limit = 20): \Illuminate\Database\Eloquent\Collection|array
    {
        //活跃用户直接拉取未读消息
        return $this->newQuery()->where('uid', $uid)->where('id', '>', $last_id)->where('is_read', self::IS_READ_DEFAULT)->orderBy('created_at', 'desc')->limit($limit)->get();
        //非活跃用户拉取大v消息，在用户状态更新时已经调用过，此处不用在做处理
    }

    //非活跃拉取已跟随大v最新文章。
    //放在用户状态更新时调用
    function pullBigFanMasterPost($uid)
    {
        //获取大v定义粉丝数,获取大于该粉丝数的大v文章
        $iConfigFansPushLimit = intval(env('CONFIG_FANS_PUSH_LIMIT', 2000));
        //@此处需针对大量数据进行分批获取
        $oFollowModel = new FollowModel();
        $oFollowList = $oFollowModel->getFollowListWithFansLimit($uid,$iConfigFansPushLimit,['a.follow_uid']);
        if ($oFollowList->isEmpty()) return null;
        $aFollowList = $oFollowList->toArray();
        $aFollowUid = array_column($aFollowList,'follow_uid');
        $oPostModel = new PostModel();
        $oPostList = $oPostModel->getPostListByUids($aFollowUid);

        //将推文发送到信箱
        $this->sendPostToBoxByUid($oPostList,$uid);

    }

    function sendPostToBoxByUid($oPostList, $uid): void
    {
        $date = date('Y-m-d H:i:s');
        foreach ($oPostList as $oPost) {
            $aItem['uid'] = $uid;
            $aItem['pid'] = $oPost->id;
            $aItem['puuid'] = $oPost->uuid;
            $aItem['created_at'] = $oPost->created_at;
            $aItem['created_box_at'] = $date;
            $this->addItem($aItem);
        }
    }

}