<?php

namespace app\admin\controller\data;

use app\common\controller\Backend;
use app\common\model\user\Study as StudyModel;
/**
 * 直播数据
 *
 * @icon fa fa-circle-o
 */
class Live extends Backend
{

    /**
     * Course模型对象
     * @var \app\admin\model\order\Course
     */
    protected $model = null;

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new StudyModel();
        $this->timeModel = new \app\admin\model\data\Time();
    }

    /**
     * 直播统计
     * @return void
     */
    public function total(){
        $time = $this->request->post('time/a',0);
        if(!$time){
            $this->success('获取成功', []);
        }

        if(count($time) == 1){
            $time = $time[0];
        }
        $unit = $this->request->post('unit',0);
        $this->timeModel = new \app\admin\model\data\Time();

        $time = $this->timeModel->getFilterStartEndTime($time,$unit);

        $where = [
            'start_time'=>['between',[$time['start'],$time['end']]]
        ];

        $data = $this->model
            ->where($where)
            ->field([
                "COUNT(DISTINCT user_id) AS study_user_count",
                "SUM(total_time) AS study_time_total",
                "COUNT(*) AS study_count",
                "COUNT(DISTINCT course_id) AS study_courses"
            ])
            ->find();


        if($data['study_time_total'] && $data['study_user_count']){
            $data['user_study_time_average'] = $data['study_time_total'] / $data['study_user_count'];
            $data['user_study_time_average'] = number_format($data['user_study_time_average']/ 60 / 60 ,2);
        }else{
            $data['user_study_time_average'] = 0;
        }

        if($data['study_time_total']){
            $data['study_time_total'] = number_format($data['study_time_total']/ 60 / 60,2 );
        }

        $data['study_time_total'] = floatval($data['study_time_total']);
        $data['user_study_time_average'] = floatval($data['user_study_time_average']);

        $this->success('获取成功', $data);
    }

    /**
     * 直播趋势
     * @return void
     */
    public function trend(){
        $time = $this->request->post('time/a',0);
        $courseId = input('course_id');

        if(!$time){
            $this->success('获取成功', []);
        }

        if(count($time) == 1){
            $time = $time[0];
        }
        $unit = $this->request->post('unit',0);
        $this->timeModel = new \app\admin\model\data\Time();
        $emptyData = [
            'study_user_count'=>0,
            'study_time_total'=>0,
            'study_count'=>0,
            'study_courses'=>0,
            'user_study_time_average'=>0
        ];

        $time = $this->timeModel->getFilterStartEndTime($time,$unit);


        if($unit == 'date'){
            $interval = 3600;
            $timeFormat = 'H:i';
            $timeFormatSql = '%H';
        }else{
            $interval = 86400;
            $timeFormat = 'Y-m-d';
            $timeFormatSql = '%Y-%m-%d';
        }

        $where = [
            'start_time'=>['between',[$time['start'],$time['end']]]
        ];

        if($courseId){
            $where['course_id']=$courseId;
        }

        $result = $this->model
            ->where($where)
            ->field([
                "FROM_UNIXTIME(start_time, '{$timeFormatSql}') as date", // 转换创建时间为日期
                "COUNT(DISTINCT user_id) AS study_user_count",
                "SUM(total_time) AS study_time_total",
                "COUNT(*) AS study_count",
                "COUNT(DISTINCT course_id) AS study_courses"
            ])
            ->group("FROM_UNIXTIME(start_time, '{$timeFormatSql}')")
            ->order("start_time", "desc")
            ->select();


        $list = [];
        if($result){
            foreach ($result as  $item){
                $timeUnit = $item['date'];
                if($unit == 'date'){
                    $timeUnit = $timeUnit.":00";
                }
                $list[$timeUnit] = $item;
            }
        }
        $data = [];
        for($i=$time['start'];$i<$time['end'];$i+=$interval){

            $timeUnit = date($timeFormat,$i);
            if(!isset($data[$timeUnit])){
                $data[$timeUnit] = $emptyData;
            }
            if(isset($list[$timeUnit])){
                $data[$timeUnit] = $list[$timeUnit];
            }

            if($data[$timeUnit]['study_time_total'] && $data[$timeUnit]['study_user_count']){
                $data[$timeUnit]['user_study_time_average'] = $data[$timeUnit]['study_time_total'] / $data[$timeUnit]['study_user_count'];
                $data[$timeUnit]['user_study_time_average'] = number_format($data[$timeUnit]['user_study_time_average']/ 60 / 60 ,2);
            }else{
                $data[$timeUnit]['user_study_time_average'] = 0;
            }

            if($data[$timeUnit]['study_time_total']){
                $data[$timeUnit]['study_time_total'] = number_format($data[$timeUnit]['study_time_total']/ 60 / 60,2 );
            }

        }
        $this->success('获取成功', $data);
    }

    /**
     * 排名
     * @return void
     */
    public function rank(){

        //当前是否为关联查询
        $this->relationSearch = false;
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        //如果发送的来源是Selectpage，则转发到Selectpage

        list($where, $sort, $order, $offset, $limit) = $this->buildparams();

        $liveIds = (new \app\admin\model\course\Course)->getLiveCourseIds();
        $list = $this->model
            ->setUniacid(false)
            ->with(['course'])
            ->field([
                'study.course_id', // 按课程分组
                'COUNT(*) as total_views', // 累计观看人次
                'COUNT(DISTINCT user_id) as total_users', // 累计观看人数
//                'AVG(total_time) as avg_watch_time', // 人均观看时长
//                '(SELECT COUNT(*) FROM '.$this->model->getTable().' AS t WHERE t.course_id = study.course_id) as course_views', // 课程浏览量
//                '(SELECT MAX(concurrent_users)
//            FROM (
//                SELECT COUNT(DISTINCT a.user_id) as concurrent_users
//                FROM '.$this->model->getTable().' a
//                JOIN '.$this->model->getTable().' b
//                ON a.start_time BETWEEN b.start_time AND b.end_time
//                OR b.start_time BETWEEN a.start_time AND a.end_time
//                WHERE a.course_id = b.course_id
//                GROUP BY a.start_time
//            ) as concurrent_table) as max_concurrent_users' // 最高同时学习人数
            ])
            ->group('study.course_id') // 按课程分组
            ->order($sort, $order)
            ->paginate($limit);


        $result = array("total" => $list->total(), "rows" => $list->items(),'attr'=>[]);
        $this->success('获取成功', $result);
    }
}