<?php
// +----------------------------------------------------------------------
// | LARAVEL8.0 框架 [ LARAVEL ][ RXThinkCMF ]
// +----------------------------------------------------------------------
// | 版权所有 2017~2021 LARAVEL研发中心
// +----------------------------------------------------------------------
// | 官方网站: http://www.laravel.cn
// +----------------------------------------------------------------------
// | Author: laravel开发员 <laravel.qq.com>
// +----------------------------------------------------------------------

namespace App\Services\Api;

use App\Models\ExamAccessLogModel;
use App\Models\VideoCategoryModel;
use App\Models\VideoCoursesModel;
use App\Models\VideoLearnLogModel;
use App\Models\VideoModel;
use App\Services\BaseService;
use App\Services\ConfigService;
use App\Services\RedisService;

/**
 * 视频课服务-服务类
 * @author laravel开发员
 * @since 2020/11/11
 * @package App\Services\Api
 */
class CourseService extends BaseService
{
    // 静态对象
    protected static $instance = null;

    /**
     * 构造函数
     * @author laravel开发员
     * @since 2020/11/11
     */
    public function __construct()
    {
        $this->model = new VideoCoursesModel();
    }

    /**
     * 静态入口
     */
    public static function make()
    {
        if (!self::$instance) {
            self::$instance = new static();
        }
        return self::$instance;
    }

    /**
     * 获取
     * @param $type
     * @param int $num
     * @return array|mixed
     */
    public function getListByType($type, $num = 0)
    {
        $num = $num? $num : \App\Services\ConfigService::make()->getConfigByCode('show_course_num', 4);
        $cacheKey = "caches:videos:type_list_{$type}_{$num}";
        $datas = RedisService::get($cacheKey);
        if($datas){
            return $datas;
        }

        $datas = VideoModel::where(['type'=>$type,'status'=>1,'mark'=>1])
            ->select(['id','video_name','poster','type','description','is_recommend','status'])
            ->orderBy('is_recommend','asc')
            ->orderBy('create_time','desc')
            ->limit($num)
            ->get();
        $datas = $datas? $datas->toArray() : [];
        if($datas){
            foreach ($datas as &$item){
                $item['poster'] = $item['poster'] ? get_image_url($item['poster']) : '';
                $item['poster_error'] = 0;
            }

            RedisService::set($cacheKey, $datas, rand(3600, 7200));
        }

        return $datas;
    }

    /**
     * 获取分类下视频课
     * @param int
     * @return array|mixed
     */
    public function getListByCate($params)
    {
        $type = isset($params['type'])? $params['type'] : 0;
        $sc = isset($params['sc'])? $params['sc'] : 0;
        $cacheKey = "caches:videos:list_by_cate:{$type}_".md5(json_encode($params));
        $datas = RedisService::get($cacheKey);

        // 视频课访问次数统计
        if(empty($sc)){
            ExamAccessLogModel::saveLog(date('Y-m-d'), $type, 20);
        }
        if($datas){
            return $datas;
        }

        //
        $datas = VideoCategoryModel::with(['courses'=>function($query) use($params){
                $kw = isset($params['keyword'])? trim($params['keyword']) : '';
                if($kw){
                    $query->where(function($query) use($kw){
                        $query->where('video_name',"like","%{$kw}%")
                            ->orwhere('description',"like","%{$kw}%");
                    });
                }

                $type = isset($params['type'])? intval($params['type']) : 0;
                if($type>0){
                    $query->where('type',$type);
                }
            }])->distinct()
            ->from('videos_categorys as a')
            ->where(['a.status'=>1,'a.mark'=>1])
            ->select(['a.id','a.name','a.sort','a.icon'])
            ->orderBy('a.sort','desc')
            ->get();
        $datas = $datas? $datas->toArray() : [];
        if($datas){
            foreach ($datas as &$item){
                $item['icon'] = $item['icon']? get_image_url($item['icon']) : '';
            }
            RedisService::set($cacheKey, $datas, rand(300,600));
        }

        return $datas;
    }

    /**
     * 获取视频集下课程列表
     * @param int
     * @return array|mixed
     */
    public function getListByGroup($groupId,$params,$pageSize)
    {
        $page = isset($params['page'])? $params['page'] : 1;
        $type = isset($params['type'])? $params['type'] : 0;
        $cid = isset($params['cid'])? $params['cid'] : 0;
        $sc = isset($params['sc'])? $params['sc'] : 0;
        $cacheKey = "caches:videos:list_by_group:{$groupId}_{$page}_{$pageSize}_{$type}".md5(json_encode($params));
        $datas = RedisService::get($cacheKey);
        // 视频课访问次数统计
        if(empty($sc)){
            ExamAccessLogModel::saveLog(date('Y-m-d'), $type, 20);
        }

        if($datas){
            return $datas;
        }

        $list = $this->model->leftJoin('videos as b','b.id','=','videos_courses.video_id')
            ->with(['vip'])
            ->where(['videos_courses.video_id'=> $groupId,'videos_courses.status'=>1,'videos_courses.mark'=>1,'b.status'=>1,'b.mark'=>1])
            ->where(function($query) use($params){
                $kw = isset($params['keyword'])? trim($params['keyword']) : '';
                if($kw){
                    $query->where('videos_courses.course_name',"like","%{$kw}%")
                        ->orwhere('videos_courses.description',"like","%{$kw}%");
                }
            })
            ->where(function($query) use($cid){
                if($cid){
                    $query->whereNotIn('videos_courses.id', [$cid]);
                }
            })
            ->select(['videos_courses.id','videos_courses.video_id','videos_courses.course_name','videos_courses.course_url','videos_courses.fee','videos_courses.poster','videos_courses.description','videos_courses.sort'])
            ->withCount(['courses','learns'])
            ->orderBy('videos_courses.sort','desc')
            ->orderBy('videos_courses.id','asc')
            ->paginate($pageSize > 0 ? $pageSize : 9999999);
        $list = $list? $list->toArray() :[];
        if($list){
            foreach ($list['data'] as &$item){

            }
        }
        $rows = isset($list['data'])? $list['data'] : [];
        $datas = [
            'pageSize'=> $pageSize,
            'total'=> isset($list['total'])? $list['total'] : 0,
            'list'=> $rows
        ];
        if($rows){
            RedisService::set($cacheKey, $datas, rand(300,600));
        }

        return $datas;
    }

    /**
     * 视频课详情
     * @param $userId 用户
     * @param $id 课程ID
     * @return array|mixed
     */
    public function getInfo($userId, $id)
    {
        $cacheKey = "caches:videos:info_{$userId}_{$id}";
        $data = RedisService::get($cacheKey, $cacheKey);
        if($data){
            return $data;
        }

        $data = $this->model->from('videos_courses as videos_courses')
            ->leftJoin('videos as b','b.id','=','videos_courses.video_id')
            ->leftJoin('videos_learn_logs as c',function($join) use($userId){
                $join->on('c.course_id','=','videos_courses.id')
                    ->where(['c.user_id'=>$userId,'c.status'=>1,'c.mark'=>1]);
            })
            ->with(['vip'])
            ->where(['videos_courses.id'=>$id,'videos_courses.status'=>1,'videos_courses.mark'=>1])
            ->select(['videos_courses.id','videos_courses.video_id','videos_courses.course_name','videos_courses.course_url','videos_courses.fee','videos_courses.poster','videos_courses.description','videos_courses.sort','c.id as learn_id','b.type'])
            ->first();
        $data = $data? $data->toArray() : [];
        if($data){
            // 验证付费视频是否有播放权限
            $fee = isset($data['fee'])? $data['fee'] : 0;
            $data['learn_id'] = !empty($data['learn_id'])? $data['learn_id'] : 0;
            $buyVipData = isset($data['vip'])? $data['vip'] : [];
            $data['buy_vip'] = $buyVipData? 1 : 0;
            $data['can_play'] = $buyVipData || $fee<=0? 1 : 0;
            $data['preview_time'] = ConfigService::make()->getConfigByCode('course_play_preview_time', 3);
            $data['courses_count'] = $this->model->where(['video_id'=> $data['video_id'],'status'=>1,'mark'=>1])->count('id');
            $data['learns_count'] = VideoLearnLogModel::where(['video_id'=> $data['video_id'],'status'=>1,'mark'=>1])->count('id');

            // 播放
            RedisService::set($cacheKey, $data, rand(5, 10));
        }

        $this->model->where(['id'=> $id])->increment('views', 1);
        return $data;
    }

    /**
     * 课程学习记录
     * @param $userId 用户
     * @param $id 课程ID
     * @return array|false|mixed
     */
    public function learn($userId, $id)
    {
        $cacheKey = "caches:videos:learn_{$userId}_{$id}";
        $data = RedisService::get($cacheKey, $cacheKey);
        if($data){
            $this->error = '课程已学习过';
            return $data;
        }

        $info = $this->model->where(['id'=> $id,'mark'=>1])->select(['id','video_id'])->first();
        $videoId = isset($info['video_id'])? $info['video_id'] : 0;
        if(empty($info)){
            $this->error = '课程不存在';
            return false;
        }

        if($videoId<=0){
            $this->error = '课程集参数错误';
            return false;
        }

        // 是否已有学习记录
        if($learnInfo = VideoLearnLogModel::where(['user_id'=>$userId,'course_id'=>$id,'video_id'=>$videoId])->select(['id','user_id','course_id','video_id'])->first()){
            RedisService::set($cacheKey, $learnInfo->toArray(), rand(300, 600));
            $this->error = '课程已学习过';
            return false;
        }

        $data = ['user_id'=> $userId,'course_id'=>$id,'video_id'=>$videoId,'create_time'=>time(),'status'=>1,'mark'=>1];
        $data['id'] = VideoLearnLogModel::insertGetId($data);
        RedisService::set($cacheKey, $data, rand(300, 600));
        $this->error = '课程学习完成';
        return false;
    }
}