<?php

namespace app\api\controller\course;

use app\common\controller\Api;
use app\common\model\user\Study as StudyModel;
use think\Cache;
/**
 * 课程
 */
class Course extends Api
{
    // 无需登录的接口,*表示全部
    protected $noNeedLogin = ['*'];
    protected $noNeedRight = '*';
    protected $SubscriptionModel;
    protected $groupBindModel;
    protected $model;

    public function _initialize()
    {
        header("Access-Control-Allow-Origin:*");
        parent::_initialize();

        $this->model = new \app\admin\model\course\Course;
        $this->styleModel = new StudyModel();
        $this->commentModel = new \app\common\model\course\Comment();
        $this->groupBindModel = new \app\api\model\course\GroupBind();
        $this->columnBindModel = new \app\api\model\course\ColumnBind();
        $this->SubscriptionModel = new \app\common\model\user\Subscription();
    }
    /**
     * 获取课程分组列表
     * @return void
     */
    public function getList(){

        $limit = input('limit',10);
        $page = input('page',1);
        $groupId = input('group');
        $isDeep = input('is_deep', 1);

        $searchKey = input('searchKey','');
        $sort = input('sort','time');
        $type = input('type','');

        if ($groupId) {
            $groupModel = new \app\admin\model\course\Group();
            $groupIds = [];
            
            if ($isDeep) {
                $groupIds = $this->getRelatedGroupIds($groupModel, $groupId);
            } else {
                $groupIds = [$groupId];
            }
           
            $list = $this->groupBindModel->getCourseListByGroupIds($groupIds, [
                'limit'=>$limit,
                'page'=>$page,
                'searchKey'=>$searchKey,
                'sort'=>$sort,
                'type'=>$type,
            ]);
        } else {
            $list = $this->groupBindModel->getCourseList(0, [
                'limit'=>$limit,
                'page'=>$page,
                'searchKey'=>$searchKey,
                'sort'=>$sort,
                'type'=>$type,
            ]);
        }
        
        $this->success('获取成功', $list);
    }

    /**
     * 获取分组及其所有相关分组ID（包括上级和下级）
     * @param object $groupModel
     * @param int $groupId
     * @return array
     */
    protected function getRelatedGroupIds($groupModel, $groupId)
    {
        $groupIds = [$groupId];
        
        $this->getParentGroupIds($groupModel, $groupId, $groupIds);
        
        $this->getChildGroupIdsRecursive($groupModel, $groupId, $groupIds);
        
        return array_unique($groupIds);
    }

    /**
     * 递归获取上级分组ID
     * @param object $groupModel
     * @param int $groupId
     * @param array $groupIds
     */
    protected function getParentGroupIds($groupModel, $groupId, &$groupIds)
    {
        $group = $groupModel
            ->where('id', $groupId)
            ->where('status', 1)
            ->where('uniacid', UNIACID)
            ->find();

        if ($group && $group['parent_id'] > 0) {
            $parent = $groupModel
                ->where('id', $group['parent_id'])
                ->where('status', 1)
                ->where('uniacid', UNIACID)
                ->find();
            
            if ($parent) {
                $groupIds[] = $parent['id'];
                $this->getParentGroupIds($groupModel, $parent['id'], $groupIds);
            }
        }
    }

    /**
     * 递归获取下级分组ID
     * @param object $groupModel
     * @param int $parentId
     * @param array $groupIds
     */
    protected function getChildGroupIdsRecursive($groupModel, $parentId, &$groupIds)
    {
        $children = $groupModel
            ->where('parent_id', $parentId)
            ->where('status', 1)
            ->where('uniacid', UNIACID)
            ->column('id');

        foreach ($children as $childId) {
            $groupIds[] = $childId;
            $this->getChildGroupIdsRecursive($groupModel, $childId, $groupIds);
        }
    }


    /**
     * 获取课程详情
     * @return void
     */
    public function detail(){
        $id = input('id',0);
        $addViews = input('add_views',0);//是否增加流量，因为直播需要频繁刷新


        $row = $this->model->get($id);

        if (!$row) {
            $this->error(__('No Results were found'));
        }
        $row = $row->toArray();
        $row = $this->model->structrue($row, 'decode');


        //增加浏览量
        if($addViews){
            $this->model->where(['id'=>$id])->setInc('views');
        }
        
        $buyData = \app\common\model\course\Course::getPrice($row['id']);

        $row = array_merge($row,$buyData);

        $row['subscription'] = \app\common\model\user\Subscription::getSubscriptionAuth($this->auth->id,$row['id']);
        //是否拥有付费会员卡免费权益（用于前端显示【加入学习】按钮）
        $row['vip_free_access'] = \app\common\model\user\Subscription::getVipFreeAccess($this->auth->id,$row['id']);

        if($row['type'] == 'live'){
            $row['try_read_content'] = $row['detail'];
            $row['try_read_status'] = 1;
            $row['live_start_time'] = strtotime($row['live_start_time']);
            $row['live_end_time'] = strtotime($row['live_end_time']);

            //获取直播地址
            $row['live_room'] = (new \app\common\model\live\Room)->courseGetRoom($row['id']);

            if($row['live_type'] == 2){
                //要计算当前播放进度
                $row['live_current_time'] = time() - $row['live_start_time'];
            }

            if($row['subscription']){
                //判断有没有成为直播课程成员
                $userInfo = (new \app\admin\model\live\User)->joinLive($this->auth->id,$row['id']);

                if($userInfo['black']){
                    return $this->error("你已被管理员拉黑，无法观看直播");
                }
            }

        }
        $row = $this->courseDataLimit($row);

        $row['is_virtual_pay'] = \app\common\library\pay\VirtualPayService::isUseVirtualPay($row['type']);
        if ($row['is_virtual_pay']) {
            $row = \app\common\library\pay\VirtualPayService::convertPriceFields($row, ['price', 'price_marking']);
        }

        return $this->success("获取成功", $row);
    }


    /**
     * 课程数据限制
     * 根据是否已订阅返回相关数据
     * @param $courseInfo
     * @return void
     */
    public function courseDataLimit($courseInfo){

        $showField = ['sales_type','type','live_type','live_screen_ratio','live_current_time','live_room','limit_copy','bullet_screen','pay_type','warm_up_cover','type_text','views','video_path','video_patch','name','briefing','live_start_time','live_end_time','price','price_marking','createtime','cover','bind_data','audio_path','detail','id','try_listen_content','try_read_status','try_watch_status','try_watch_content','try_read_content','try_listen_status','subscription','vip_free_access'];

        foreach ($courseInfo as $key => &$item){
            if(!in_array($key,$showField)){
                unset($courseInfo[$key]);
            }
        }

        if(!$courseInfo['subscription']){
            $courseInfo['detail'] = '';
            $courseInfo['audio_path'] = [];
            $courseInfo['video_path'] = [];

            $bindDataFiled = ['id','filename','filesize','filetype','auth'];
            foreach ($courseInfo['bind_data'] as &$item){
                if(!isset($item['auth'])){
                    $item['auth'] = 'previewdown';
                }
                foreach ($item as $key => $value){
                    if(!in_array($key,$bindDataFiled)){
                        unset($item[$key]);
                    }
                }
            }
        }

        $courseInfo['study_num'] = $this->styleModel->getCourseStudyNum($courseInfo['id']);
        $courseInfo['comment_num'] = $this->commentModel->getCourseCommentCount($courseInfo['id']);

        $courseInfo['try_listen_status'] = !empty($courseInfo['try_listen_status']) ? true:false;
        $courseInfo['try_read_status'] = !empty($courseInfo['try_read_status']) ? true:false;
        $courseInfo['try_watch_status'] = !empty($courseInfo['try_watch_status']) ? true:false;
        //跑马灯
        $courseInfo['bullet_screen'] = $courseInfo['bullet_screen'] == 1 ? $this->auth->username : 0;

        $vodFileType = ['audio_path','video_path','try_listen_content','try_watch_content'];
        foreach ($vodFileType as $vodFile){
            if(isset($courseInfo[$vodFile]) && $courseInfo[$vodFile] && $courseInfo[$vodFile]['storage'] == 'alivod'){
                $courseInfo[$vodFile]['fullurl'] = \addons\alivod\library\Alivod::parseAliovdTag($courseInfo[$vodFile]['fullurl']);
            }
        }

        $courseInfo['detail'] = \addons\alivod\library\Alivod::parseContentAliovdTag($courseInfo['detail']);
        
        $courseInfo['try_read_content'] = \addons\alivod\library\Alivod::parseContentAliovdTag($courseInfo['try_read_content']);

        if($courseInfo['bind_data']){
            foreach ($courseInfo['bind_data'] as &$item){
                if(isset($item['fullurl'])){
                    try{
                        $parseVodTag = \addons\alivod\library\Alivod::getMezzanineInfo($item['fullurl']);
                        if($parseVodTag && isset($parseVodTag->Mezzanine) && isset($parseVodTag->Mezzanine->FileURL)){
                            $item['fullurl'] = $parseVodTag->Mezzanine->FileURL;
                        }
                    }catch (\Exception $e){}
                }
            }
        }

        return $courseInfo;
    }


    /**
     * 获取课程所属专栏
     * @return void
     */
    public function getBelongsColumn($course_id)
    {

        $cacheData = Cache::get(\app\common\constant\cache\Keys::COURSE_BELONGS_COLUMN.$course_id);

        if($cacheData){
            return $this->success("获取成功", $cacheData);
        }

        $list = $this->columnBindModel
            ->with(['column'])
            ->where([
                'course_id'=>$course_id,
                'column.status'=>1,
                'column_bind.type'=>1,
                'column_bind.status'=>1
            ])
            ->select();

        if($list){
            foreach ($list as &$item){
                $item->count = $this->columnBindModel->where([
                    'column_id'=>$item['column_id']
                ])->count();
                $item->getRelation('column')->visible(['name','cover','id']);
                $item->visible(['id','column','count']);
            }

            $list = collection($list)->toArray();
        }

        Cache::tag(\app\common\constant\cache\Keys::COURSE_TAG)->set(\app\common\constant\cache\Keys::COURSE_BELONGS_COLUMN.$course_id,$list);


        return $this->success("获取成功", $list);
    }

}