<?php namespace App\Http\Controllers\Api\Video;

use App\Http\Controllers\Api\Api;
use App\Models\Video\LearnAnswer as Model;
use App\Models\Video\Answer as VideoAnswer;
use App\Models\Video\Question as VideoQuestion;
use App\Models\Video\LearnQuestion;
use App\Models\Video\LearnRecord;
use App\Models\CustomScore;
use Illuminate\Support\Facades\DB;

/**
 * 课程
 *
 * @author    刘相欣
 *
 */
class LearnAnswer extends Api{
	
    
    /**
     * 获取答题记录      /api/video_learn_answer/get_list
     * 
     */
    public function get_list(Model $Model,VideoQuestion $VideoQuestion,VideoAnswer $VideoAnswer){
        // 用户登录
        $uid                        = $this->checkLogin();
        // 接收参数
        $recordId                   = request('record_id',0);
        // 如果不是课中习题
        if( !$recordId )            return json_send(['code'=>'error','msg'=>'请选择学习记录']);
        // 查询答题记录
        $answerList                 = $Model->query()
                                    ->where([['record_id','=',$recordId]])
                                    ->select(['id','record_id','course_id','question_id','answer_id','is_answer','get_score'])
                                    ->get()->toArray();
        // 循环答题
        foreach ($answerList as $key => $value) {
            // 题目标题
            $value['question_title']= $VideoQuestion->getOne($value['question_id'],'title');
			$value['answer_list'] 	= $VideoAnswer->getListByQuestion($value['question_id']);
			$value['answer_list'] 	= array_values($value['answer_list']);
            // 重组
			$answerList[$key]		= $value;
        }
        // 返回结果
        return                      json_send(['code'=>'success','msg'=>'获取成功','data'=>$answerList]);
    }

    /**
     * 上报课中习题答案     /api/video_learn_answer/play_exam
     * 
     */
    public function play_exam(Model $Model,LearnQuestion $LearnQuestion,VideoQuestion $VideoQuestion,VideoAnswer $VideoAnswer,CustomScore $CustomScore,LearnRecord $LearnRecord){
        // 用户登录
        $uid                        = $this->checkLogin();
        // 接收参数
        $data['custom_uid']         = $uid;
		$data['record_id']          = request('record_id',0);
        $data['course_id']          = request('course_id',0);
        $data['question_id']        = request('question_id',0);
        $data['answer_id']          = request('answer_id',0);
		// 
		if( ! $data['record_id'] )	return json_send(['code'=>'error','msg'=>'请选择学习记录']);
		if( ! $data['course_id'] )	return json_send(['code'=>'error','msg'=>'请选择学习课程']);
		if( ! $data['question_id'] )return json_send(['code'=>'error','msg'=>'请选择习题问题']);
		if( ! $data['answer_id'] )	return json_send(['code'=>'error','msg'=>'请选择习题答案']);
		// 判断是不是课中习题
        $isLearnQuestion            = $LearnQuestion->getOne($data['course_id'],$data['question_id']);
        // 如果不是课中习题
        if( !$isLearnQuestion )     return json_send(['code'=>'error','msg'=>'题目有误或者题目已停用']);

        // 通过记录ID。查询问题是否已经回答
		$havaAnswer					= $Model->query()->where([['record_id','=',$data['record_id']],['custom_uid','=',$uid],['question_id','=',$data['question_id']]])->first();
		// 如果答过题
		if( $havaAnswer )			return json_send(['code'=>'error','msg'=>'已答题，请无重复作答']);
		// 查询该用户该课程该题答题记录
        $answerRecord               = $Model->where([['custom_uid','=',$uid],['course_id','=',$data['course_id']],['question_id','=',$data['question_id']]])->first();
        // 获取题目分数
        $data['score']              = (int) $VideoQuestion->getOne($data['question_id'],'score');
        // 获取答案
        $data['is_answer']          = (int) $VideoAnswer->getOne($data['question_id'],$data['answer_id'],'is_answer');
        // 如果没有答题记录，并且题目答案正确，则获取分数
        $data['get_score']          = (!$answerRecord && $data['is_answer']) ? $data['score'] : 0;

        // 获取题目数量
        $learnData['question_total']= count($LearnQuestion->getList($data['course_id']));
        // 查询答题数量
        $learnData['answer_total']  = ($Model->query()->where([['record_id','=',$data['record_id']],['custom_uid','=',$uid]])->count()) + 1;
		// 查询答对数量
        $learnData['isanswer_total']= ($Model->query()->where([['record_id','=',$data['record_id']],['custom_uid','=',$uid],['is_answer','=',1]])->count()) + ($data['is_answer'] ? 1 : 0);
        // 查询答题总积分
        $learnData['get_score']     = intval($Model->query()->where([['record_id','=',$data['record_id']],['custom_uid','=',$uid]])->sum('get_score')) + $data['get_score'];

        // 开始事务
        DB::beginTransaction();
        // 保存答题记录
        $data['id']                 = $Model->add($data);
        // 答题记录保存失败
        if ( !$data['id'] )     {
            // 回滚事务
            DB::rollBack();
            // 失败提醒
            return              json_send(['code'=>'error', 'msg'=>'答题记录失败，请重试']);
        }
        // 如果有获取积分
        if ($data['get_score']) {
            // 积分奖励
            $result             = $CustomScore->trade($uid,$data['id'],$data['get_score'],10,1,'课中评测奖励');
            // 积分奖励失败
            if( isset($result['error']) )      {
                // 回滚事务
                DB::rollBack();
                // 失败提醒
                return          json_send(['code'=>'error', 'msg'=>'积分下发失败，请重试','data'=>['error'=>$result['error']]]);
            }
        }
        // 写入/修改学习记录
        $result                 = $LearnRecord->edit($data['record_id'],$learnData);
        // 写入失败
        if( !$result )          {
            // 回滚事务
            DB::rollBack();
            // 失败提醒
            return              json_send(['code'=>'error', 'msg'=>'学习记录失败，请重试','data'=>['error'=>'学习记录写入失败']]);
        }
        // 提交事务
        DB::commit();
        // 成功提醒
        return                  json_send(['code'=>'success', 'msg'=>'提交成功','data'=>$data]);
    }
}