<?php

namespace app\api\controller;

use app\common\controller\Api;
use think\Db;
use think\Session;

/**
 * 考试接口
 */
class Exam extends Api
{
    protected $noNeedLogin = ['index','examtext'];
    protected $noNeedRight = ['*'];

    /**
     * @ApiTitle    (考试题型分值接口)
     * @ApiSummary  (考试题型分值接口)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/index)
     *
     * @ApiParams   (name="study_id", type="int", required=true, description="学习系统id")
     *
     * @ApiReturn({
        "code": 1,
        "msg": "成功",
        "time": "1571492001",
        "data": {
            "examname": //考试名称
            "pass_mark": //及格分数,
            "dan_num": //单选题数量,
            "dan_score": //单选题分值,
            "duo_num": //多选题数量,
            "duo_score": //多选题分值,
            "pan_num": //判断题数量,
            "pan_score": //判断题分值
            "examdurationtime"://考试时长
        }
    })
     */
    public function index()
    {
        $study_id = $this->request->param('study_id');
        if(empty($study_id)){
            $this->error('缺少必要参数');
        }
        $data = Db::name('study')
            ->where('id',$study_id)
            ->field('examname,pass_mark,dan_num,dan_score,duo_num,duo_score,pan_num,pan_score,examdurationtime')
            ->find();
        $data['zong'] = bcmul($data['dan_num'],$data['dan_score']) + bcmul($data['duo_num'],$data['duo_score']) + bcmul($data['pan_num'],$data['pan_score']);
        $this->success('success',$data);
    }

    /**
     * @ApiTitle    (开始考试题型)
     * @ApiSummary  (开始考试题型)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/question)
     *
     * @ApiHeaders  (name=token, type=string, required=true, description="请求的Token")
     * @ApiParams   (name="study_id", type="int", required=true, description="学习系统id")
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {

    "exam_num"://第几次考试
    "third_exam_id"://考试记录id
    "dan": [
        {
        "id": //单选题id,
        "content": //题目,
        "type": //类型1文字选项2图片选项,
        "option": [
            {
                "name": //选项名称,
                "gender": //选项内容
            },
        ],
        "answer": "D"
        }
    ],
    "duo": [
    {
    "id": 1,
    "content": "<p>1+1等于几</p>",
    "type": 1,
    "option": [
    {
    "name": "A",
    "gender": "2"
    },
    ],
    "answer": "A,D"
    }
    ],
    "pan": [
    {
    "id": 1,
    "content": "<p>1+1是等于2吗</p>",
    "answer": "A",
    "option": [
    {
    "name": "A",
    "gender": "正确"
    },
    {
    "name": "B",
    "gender": "错误"
    }
    ]
    }
    ]


    }
    })
     */
    public function question()
    {
        $user_id = $this->auth->id;
        $qiniu = get_addon_config('qiniu')['cdnurl'];
        $study_id = $this->request->param('study_id');
        if(empty($study_id)){
            $this->error('缺少必要参数');
        }

        //查看用户该科目是否已经考过3次了
        $third_exam = Db::name('third_exam')
            ->where('user_id',$user_id)
            ->where('study_id',$study_id)
            ->order('exam_num desc')
            ->find();
        if(empty($third_exam)){
            $exam['user_id'] = $user_id;
            $exam['study_id'] = $study_id;
            $exam['exam_num'] = 1;
            $exam['createtime'] = time();
            $exam['updatetime'] = time();

            $info['third_exam_id'] = Db::name('third_exam')->insertGetId($exam);
        }else{
            if($third_exam['exam_num'] == 6){
                $this->error('您已经考过六次了');
            }
            $study = Db::name('study')->where('id',$study_id)->find();
            $where_exam = [
                'user_id' => $user_id,
                'study_id' => $study_id,
                'score' => ['egt',$study['pass_mark']]
            ];
            $third_exam_pass = Db::name('third_exam')->where($where_exam)->find();
            if($third_exam_pass) $this->error('已通过该考试');
            $exam['user_id'] = $user_id;
            $exam['study_id'] = $study_id;
            $exam['exam_num'] = $third_exam['exam_num'] + 1;
            $exam['createtime'] = time();
            $exam['updatetime'] = time();
            $info['third_exam_id'] =Db::name('third_exam')->insertGetId($exam);
        }

        //该学习科目的题型信息 单选题数量  多选题数量  判断题数量
        $data = Db::name('study')
            ->where('id',$study_id)
            ->field('pass_mark,dan_num,dan_score,duo_num,duo_score,pan_num,pan_score')
            ->find();

        //判断第几次考试
        $is_have = Db::name('answer_detail')->where('user_id',$user_id)->where('study_id',$study_id)->order('id desc')->find();

        //添加用户考试记录详情表中
        $answer['user_id'] = $user_id;
        $answer['study_id'] = $study_id;
        $answer['createtime'] = time();
        $answer['updatetime'] = time();

        if(empty($is_have)){
            $info['exam_num'] = 1;
        }else{
            $info['exam_num'] = $is_have['study_exam_num'] + 1;
        }

        //单选题库
        $info['dan'] = Db::name('dan')
            ->field('id,content,type,option,answer')
            ->where('study_id',$study_id)
            ->orderRaw('rand()')
            ->limit($data['dan_num'])
            ->select();
        foreach ($info['dan'] as &$v){
            $answer['type'] = 1;
            $answer['question_id'] = $v['id'];
            if(empty($is_have)){
                $answer['study_exam_num'] = 1;
            }else{
                $answer['study_exam_num'] = $is_have['study_exam_num'] + 1;
            }
            Db::name('answer_detail')->insertGetId($answer);
            $v['option'] = json_decode($v['option'],true);
            if($v['type'] == 2){
                foreach ($v['option'] as &$val){
                    $val['gender'] = $qiniu.$val['gender'];
                }
            }
        }

        //多选题库
        $info['duo'] = Db::name('duo')
            ->field('id,content,type,option,answer')
            ->where('study_id',$study_id)
            ->orderRaw('rand()')
            ->limit($data['duo_num'])
            ->select();
        foreach ($info['duo'] as &$v){
            $answer['type'] = 2;
            $answer['question_id'] = $v['id'];
            if(empty($is_have)){
                $answer['study_exam_num'] = 1;
            }else{
                $answer['study_exam_num'] = $is_have['study_exam_num'] + 1;
            }
            Db::name('answer_detail')->insertGetId($answer);
            $v['option'] = json_decode($v['option'],true);
            if($v['type'] == 2){
                foreach ($v['option'] as &$val){
                    $val['gender'] = $qiniu.$val['gender'];
                }
            }
        }

        //判断题库
        $info['pan'] = Db::name('pan')
            ->field('id,content,answer')
            ->where('study_id',$study_id)
            ->orderRaw('rand()')
            ->limit($data['pan_num'])
            ->select();
        foreach ($info['pan'] as &$v){
            $answer['type'] = 3;
            $answer['question_id'] = $v['id'];
            if(empty($is_have)){
                $answer['study_exam_num'] = 1;
            }else{
                $answer['study_exam_num'] = $is_have['study_exam_num'] + 1;
            }
            Db::name('answer_detail')->insertGetId($answer);
            $v['option'] = array([
                'name'=>'A',
                'gender'=>'正确'
            ],
            [
                'name'=>'B',
                'gender'=>'错误'
            ]
            );
        }

        $this->success('success',$info);



    }

    /**
     * @ApiTitle    (考试次数)
     * @ApiSummary  (考试次数)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/examnum)
     *
     * @ApiHeaders  (name="token", type=string, required=true, description="请求的Token")
     * @ApiParams   (name="study_id", type="int", required=true, description="学习系统id")
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {
    }
    })
     */
    public function examnum()
    {
        $user_id = $this->auth->id;
        $study_id = $this->request->param('study_id');
        if(empty($study_id)){
            $this->error('缺少必要参数');
        }
        //查看用户该科目是否已经考过3次了
        $third_exam = Db::name('third_exam')
            ->where('user_id',$user_id)
            ->where('study_id',$study_id)
            ->order('exam_num desc')
            ->find();
        if($third_exam['exam_num'] == 6){
            $this->error('您已经考过六次了');
//            $this->success('success');
        }else{
            $this->success('success');
        }
    }

    /**
     * @ApiTitle    (考试须知)
     * @ApiSummary  (考试须知)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/examtext)
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {
    "content"://内容
    }
    })
     */
    public function examtext()
    {
        $data = Db::name('examtext')->where('id',1)->find();
        $this->success('success',$data);
    }

    /**
     * @ApiTitle    (考试记录)
     * @ApiSummary  (考试记录)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/exam_record)
     *
     * @ApiHeaders  (name="token", type=string, required=true, description="请求的Token")
     * @ApiParams   (name="study_id", type="int", required=true, description="学习系统id")
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {
        "examname": //考试名称,
        "record": [
        {
            "id": //id,
            "exam_num": //第几次考试,
            "score": //考试成绩,
            "createtime": //考试时间
            "is_pass"://是否已过 1通过2未过
        }
        ]
    }
    })
     */
    public function exam_record()
    {
        $user_id = $this->auth->id;
        $study_id = $this->request->param('study_id');
        if(empty($study_id)){
            $this->error('缺少必要参数');
        }

        $study = Db::name('study')
            ->where('id',$study_id)
            ->field('id,examname,pass_mark')
            ->find();
        $data['examname'] = $study['examname'];

//        $data['record'] = Db::name('third_exam')
//            ->where('user_id',$user_id)
//            ->where('study_id',$study_id)
//            ->order('exam_num')
//            ->field('id,exam_num,score,createtime')
//            ->select();
//        foreach ($data['record'] as &$v){
//            if($v['score'] >= $study['pass_mark']){
//                $v['is_pass'] = 1;
//            }else{
//                $v['is_pass'] = 2;
//            }
//            $v['createtime'] = date('Y-m-d',$v['createtime']);
//        }

        $data['record'] = [];
        for ($i=1;$i<=6;$i++){
            $exam = Db::name('third_exam')
                ->where('user_id',$user_id)
                ->where('study_id',$study_id)
                ->where('exam_num',$i)
                ->field('id,exam_num,score,createtime')
                ->find();
            if($exam){
                if($exam['score'] >= $study['pass_mark']){
                    $exam['is_pass'] = 1;
                }else{
                    $exam['is_pass'] = 2;
                }
                $exam['createtime'] = date('Y-m-d',$exam['createtime']);
            }else{
                $exam = [
                    'id' => 0,
                    'exam_num' => $i,
                    'score' => 0,
                    'createtime' => 0,
                    'is_pass' => 2
                ];
            }
            $data['record'][] = $exam;
        }

        $this->success('success',$data);

    }


    /**
     * @ApiTitle    (提交答案)
     * @ApiSummary  (提交答案)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/exam_answer)
     *
     * @ApiHeaders  (name="token", type=string, required=true, description="请求的Token")
     * @ApiParams   (name="study_id", type="int", required=true, description="学习系统id")
     * @ApiParams   (name="question_id", type="int", required=true, description="题目id")
     * @ApiParams   (name="type", type="int", required=true, description="类型1单选2多选3判断")
     * @ApiParams   (name="answer", type="string", required=true, description="用户答案")
     * @ApiParams   (name="study_exam_num", type="string", required=true, description="用户第几次考试")
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {
    }
    ]
    }
    })
     */
    public function exam_answer()
    {
        $user_id = $this->auth->id;
        $study_id = $this->request->param('study_id');
        $question_id = $this->request->param('question_id/a');
        $type = $this->request->param('type');
        $answer = $this->request->param('answer');

        // 题目ID过滤
        $question_id = implode(',',array_filter($question_id));
        
        $study_exam_num = $this->request->param('study_exam_num');
        if(empty($study_id) || empty($question_id) || empty($type) || empty($study_exam_num)){
            $this->error('缺少必要参数');
        }
        //单选题
        if($type == 1){
            $this->judge($user_id,$study_id,1,$question_id,$study_exam_num,$answer);
        }elseif ($type == 2){
            $this->judge($user_id,$study_id,2,$question_id,$study_exam_num,$answer);
        }elseif ($type == 3){
            $this->judge($user_id,$study_id,3,$question_id,$study_exam_num,$answer);
        }else{
            $this->error('类型错误');
        }
    }

    //判断用户回答是否正确以及得多少分
    public function judge($user_id,$study_id,$type,$question_id,$study_exam_num,$answer){
        $study = Db::name('study')->where('id',$study_id)->find();
        if($type == 1){
            //查询出该条题目详情
            $data = Db::name('answer_detail')
                ->where('user_id',$user_id)
                ->where('study_id',$study_id)
                ->where('type',1)
                ->where('question_id',$question_id)
                ->where('study_exam_num',$study_exam_num)
                ->find();
            if(empty($data)){
                $this->error('参数有误');
            }else{
                //查询该题的正确答案
                $correct = Db::name('dan')
                    ->where('id',$question_id)
                    ->value('answer');
                //判断用户是否回答正确
                if($correct == $answer){
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>$study['dan_score']]);
                }else{
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>0]);
                }
                //算出总得分
                $score = Db::name('answer_detail')
                    ->where('user_id',$user_id)
                    ->where('study_id',$study_id)
                    ->where('study_exam_num',$study_exam_num)
                    ->field('sum(score) as num')
                    ->find();
                Db::name('third_exam')->where('user_id',$user_id)->where('study_id',$study_id)->where('exam_num',$study_exam_num)->update(['score'=>$score['num']]);
            }
        }elseif ($type == 2){
            //查询出该条题目详情
            $data = Db::name('answer_detail')
                ->where('user_id',$user_id)
                ->where('study_id',$study_id)
                ->where('type',2)
                ->where('question_id',$question_id)
                ->where('study_exam_num',$study_exam_num)
                ->find();
            if(empty($data)){
                $this->error('参数有误');
            }else{
                //查询该题的正确答案
                $correct = Db::name('duo')
                    ->where('id',$question_id)
                    ->value('answer');

                if(!empty($correct)){
                    $correct = str_split(str_replace([',','，',' '],'',$correct));
                }
                $answer1 = [];
                if(!empty($answer)){
                    $answer1 = explode(',',$answer);
                }
                $result = count($answer1) > count($correct) ? array_diff($answer1,$correct) : array_diff($correct,$answer1);

                //判断用户是否回答正确
                if(empty($result)){
                    //回答正确
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>$study['duo_score']]);
                }else{
                    //回答错误
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>0]);
                }

                //算出总得分
                $score = Db::name('answer_detail')
                    ->where('user_id',$user_id)
                    ->where('study_id',$study_id)
                    ->where('study_exam_num',$study_exam_num)
                    ->field('sum(score) as num')
                    ->find();
                Db::name('third_exam')->where('user_id',$user_id)->where('study_id',$study_id)->where('exam_num',$study_exam_num)->update(['score'=>$score['num']]);
            }
        }elseif ($type == 3){
            //查询出该条题目详情
            $data = Db::name('answer_detail')
                ->where('user_id',$user_id)
                ->where('study_id',$study_id)
                ->where('type',3)
                ->where('question_id',$question_id)
                ->where('study_exam_num',$study_exam_num)
                ->find();
            if(empty($data)){
                $this->error('参数有误');
            }else{
                //查询该题的正确答案
                $correct = Db::name('pan')
                    ->where('id',$question_id)
                    ->value('answer');
                //判断用户是否回答正确
                if($correct == $answer){
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>$study['pan_score']]);
                }else{
                    Db::name('answer_detail')->where('id',$data['id'])->update(['answer'=>$answer,'score'=>0]);
                }
                //算出总得分
                $score = Db::name('answer_detail')
                    ->where('user_id',$user_id)
                    ->where('study_id',$study_id)
                    ->where('study_exam_num',$study_exam_num)
                    ->field('sum(score) as num')
                    ->find();
                Db::name('third_exam')->where('user_id',$user_id)->where('study_id',$study_id)->where('exam_num',$study_exam_num)->update(['score'=>$score['num']]);
            }
        }
    }


    /**
     * @ApiTitle    (交卷)
     * @ApiSummary  (交卷)
     * @ApiMethod   (POST)
     * @ApiRoute    (/api/exam/tijiao)
     *
     * @ApiHeaders  (name="token", type=string, required=true, description="请求的Token")
     * @ApiParams   (name="id", type="inter", required=true, description="考试记录id")
     *
     * @ApiReturn({
    "code": 1,
    "msg": "成功",
    "time": "1571492001",
    "data": {
          "num"://考试机会
          "score"://分数
    }
    ]
    }
    })
     */
    public function tijiao()
    {
        $id = $this->request->param('id');
        if(empty($id)){
            $this->error('缺少必要参数');
        }
        $data = Db::name('third_exam')
            ->where('id',$id)
            ->find();
        $info['num'] = 6 - $data['exam_num'];
        $info['score'] = $data['score'];
        $this->success('success',$info);
    }

    



}