<?php

namespace App\Models\Api\Follow;

use App\Exceptions\ModelException;
use App\Models\Api\Base\ApiBaseModel;
use App\Models\Api\Customer\CustomerUserExtendModel;
use Illuminate\Support\Facades\DB;

class FollowModel extends ApiBaseModel
{
    protected $table = 'customer_follow';
    protected $primaryKey = 'id';
    protected $fillable = [
        'id',
        'uid',
        'follow_uid',
        'created_at',
    ];

    /**
     * 添加订阅  订阅别人
     * @throws ModelException
     */
    function addFollow($uid, $follow_uid): \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Builder|array|null
    {
        $aItem['uid'] = $uid;
        $aItem['follow_uid'] = $follow_uid;
        $sDateTime = date('Y-m-d H:i:s');
        $aItem['created_at'] = $sDateTime;
        $res = $this->addItem($aItem);
        if ($res) {
            //增加到历史记录里
            $oFollowHistoryModel = new FollowHistoryModel();
            $oFollowHistoryModel->addFollowHistory(FollowHistoryModel::METHOD_FOLLOW, $uid, $follow_uid);

            try {
                DB::beginTransaction();

                //增加到user_extends中
                $oCustomerUserExtendModel = new CustomerUserExtendModel();
                $oCustomerUserExtendModel->incrFollowNum($uid);
                $oCustomerUserExtendModel->incrFansNum($follow_uid);

                DB::commit();
            }catch (\Exception $e){
                DB::rollBack();
                throw new ModelException($e->getMessage());
            }
        }

        return $res;
    }

    /**
     * 取消订阅
     * @throws ModelException
     */
    function unFollow($uid, $follow_uid)
    {
        $res = $this->newQuery()->where('uid', $uid)->where('follow_uid', $follow_uid)->delete();
        if ($res) {
            //增加到历史记录里
            $oFollowHistoryModel = new FollowHistoryModel();
            $oFollowHistoryModel->addFollowHistory(FollowHistoryModel::METHOD_UNFOLLOW, $uid, $follow_uid);

            try {
                DB::beginTransaction();

                //增加到user_extends中
                $oCustomerUserExtendModel = new CustomerUserExtendModel();
                $oCustomerUserExtendModel->decrFollowNum($uid);
                $oCustomerUserExtendModel->decrFansNum($follow_uid);

                DB::commit();
            }catch (\Exception $e){
                DB::rollBack();
                throw new ModelException($e->getMessage());
            }
        }
        return $res;
    }

    //获取user following(订阅)列表
    function getFollowList($uid): \Illuminate\Database\Eloquent\Collection|array
    {
        return $this->newQuery()->where('uid', $uid)->get();
    }

    //获取关注列表中大v用户
    function getFollowListWithFansLimit($uid,$iFansLimit = 2000,$col = ['a.follow_uid']): \Illuminate\Support\Collection
    {
        $oCustomerUserExtendModel = new CustomerUserExtendModel();
        $oFollowModel = new FollowModel();

        $oModel = DB::table($oFollowModel->getTable() . ' as a');
        return $oModel->where('a.uid', $uid)
            ->leftjoin($oCustomerUserExtendModel->getTable() . ' as b', 'a.follow_uid', '=', 'b.uid')
            ->where('b.fans_num','>=', $iFansLimit)
            ->get($col);
    }

    //检测是否双向关注
    function isEachOtherFollow($uid, $follow_uid): bool
    {
        $aFollow = $this->isFollow($uid, $follow_uid);
        $aFollow2 = $this->isFollow($follow_uid, $uid);
        if ($aFollow && $aFollow2) {
            return true;
        }
        return false;
    }

    function isFollow($uid, $follow_uid): \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Builder|null
    {
        return $this->newQuery()->where('uid', $uid)->where('follow_uid', $follow_uid)->first(['id']);
    }

    //获取关注数
    function getFollowCount($uid): int
    {
        return $this->newQuery()->where('uid', $uid)->count();
    }

    //获取被关注列表
    function getFansList($uid, $col = ['*'], $offset = null, $limit = null): \Illuminate\Database\Eloquent\Collection|array
    {
        $oModel = $this->newQuery();
        if ($offset) $oModel->offset($offset);
        if ($limit) $oModel->limit($offset);
        return $oModel->where('follow_uid', $uid)->get($col);
    }

    //检测是否被关注
    function isFollowed($uid, $follow_uid): \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Builder|null
    {
        return $this->newQuery()->where('uid', $follow_uid)->where('follow_uid', $uid)->first(['id']);
    }

    //获取粉丝数（被关注数）
    function getFansCount($uid): int
    {
        return $this->newQuery()->where('follow_uid', $uid)->count(['id']);
    }

    //获取活跃粉丝列表
    function getActiveFansUidList($uid, $col = ['a.*'], $offset = null, $limit = null): \Illuminate\Support\Collection
    {
        $oCustomerUserExtendModel = new CustomerUserExtendModel();
        $oFollowModel = new FollowModel();

        $oModel = DB::table($oFollowModel->getTable() . ' as a');
        if ($offset) $oModel->offset($offset);
        if ($limit) $oModel->limit($offset);
        return $oModel->where('a.follow_uid', $uid)
            ->leftjoin($oCustomerUserExtendModel->getTable() . ' as b', 'a.uid', '=', 'b.uid')
            ->where('b.is_active', CustomerUserExtendModel::IS_ACTIVE_YES)
            ->get($col);
    }

    //获取活跃粉丝计数
    function getActiveFansUidListCount($uid, $col = ['a.id']): int
    {
        $oCustomerUserExtendModel = new CustomerUserExtendModel();
        $oFollowModel = new FollowModel();
        return DB::table($oFollowModel->getTable() . ' as a')->where('a.follow_uid', $uid)
            ->leftjoin($oCustomerUserExtendModel->getTable() . ' as b', 'a.uid', '=', 'b.uid')
            ->where('b.is_active', CustomerUserExtendModel::IS_ACTIVE_YES)
            ->count($col);
    }


}