package com.gkhy.exam.system.service.impl;

import com.alibaba.fastjson2.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gkhy.exam.common.api.CommonPage;
import com.gkhy.exam.common.domain.entity.SysUser;
import com.gkhy.exam.common.enums.PaperStudentStateEnum;
import com.gkhy.exam.common.enums.PrivatizeEnum;
import com.gkhy.exam.common.enums.QuestionTypeEnum;
import com.gkhy.exam.common.enums.UserTypeEnum;
import com.gkhy.exam.common.exception.ApiException;
import com.gkhy.exam.common.utils.PageUtils;
import com.gkhy.exam.common.utils.SecurityUtils;
import com.gkhy.exam.common.utils.StringUtils;
import com.gkhy.exam.system.domain.ExExamPaper;
import com.gkhy.exam.system.domain.ExPaperStudent;
import com.gkhy.exam.system.domain.ExQuestion;
import com.gkhy.exam.system.domain.ExQuestionBank;
import com.gkhy.exam.system.mapper.ExExamPaperMapper;
import com.gkhy.exam.system.mapper.ExPaperStudentMapper;
import com.gkhy.exam.system.mapper.ExQuestionBankMapper;
import com.gkhy.exam.system.mapper.ExQuestionMapper;
import com.gkhy.exam.system.service.ExQuestionService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * <p>
 * 考题表 服务实现类
 * </p>
 *
 * @author kzy
 * @since 2024-06-06 13:53:17
 */
@Service
public class ExQuestionServiceImpl extends ServiceImpl<ExQuestionMapper, ExQuestion> implements ExQuestionService {
    @Autowired
    private ExPaperStudentMapper paperStudentMapper;
    @Autowired
    private ExExamPaperMapper examPaperMapper;
    @Autowired
    private ExQuestionBankMapper questionBankMapper;

    @Override
    public CommonPage selectQuestionList(ExQuestion question) {
//        if(question.getBankId()==null){
//            throw new ApiException("题库id不能为空");
//        }
//        ExQuestionBank questionBank=questionBankMapper.selectById(question.getBankId());
//        if(!questionBank.getPrivatize().equals(PrivatizeEnum.PUBLIC.getCode())){
//            SysUser currentUser=SecurityUtils.getLoginUser().getUser();
//            if(!currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
//                if(!question.getCompanyId().equals(currentUser.getCompanyId())){
//                    throw new ApiException("无权限查看其它企业题目");
//                }
//            }
//        }
        SysUser currentUser=SecurityUtils.getLoginUser().getUser();
        if(!currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            question.setCompanyId(currentUser.getCompanyId());
        }
        PageUtils.startPage();
        List<ExQuestion> questionList=baseMapper.selectQuestionList(question);
        return CommonPage.restPage(questionList);
    }

    @Override
    public ExQuestion selectQuestionById(Long questionId) {
        ExQuestion question= baseMapper.selectByQuestionId(questionId);
        if(question.getPrivatize().equals(PrivatizeEnum.PUBLIC.getCode())){
            return question;
        }
        SysUser currentUser=SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return question;
        }
        if(!question.getCompanyId().equals(currentUser.getCompanyId())){
            throw new ApiException("无权限查看其它企业题目");
        }
        return question;
    }

    @Override
    public int insertQuestion(ExQuestion question) {
        checkUserAllowed(question);
        SysUser user= SecurityUtils.getLoginUser().getUser();
        int totalCount=questionBankMapper.selectCountByBankId(question.getBankId());
        if(totalCount>1000){
            throw new ApiException("题库题目数量超过1000,不能再新增");
        }
        //公开的题库新增题目，题目也是公开
        ExQuestionBank questionBank=questionBankMapper.selectById(question.getBankId());
        if(user.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())&&questionBank.getPrivatize().equals(PrivatizeEnum.PRIVATE.getCode())){
            throw new ApiException("管理员不允许在私有题库创建题目");
        }else if (user.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())&&questionBank.getPrivatize().equals(PrivatizeEnum.PUBLIC.getCode())){
            question.setPrivatize(PrivatizeEnum.PUBLIC.getCode());
        }else{
            question.setCompanyId(user.getCompanyId());
            question.setPrivatize(PrivatizeEnum.PRIVATE.getCode());
        }
        validData(question);
        question.setCreateBy(user.getUsername());
        int row=baseMapper.insert(question);
        if(row<1){
            throw new ApiException("新增题目失败");
        }
        return row;
    }

    @Override
    public int updateQuestion(ExQuestion question) {
        validData(question);
        checkUserAllowed(question);
        question.setUpdateBy(SecurityUtils.getUsername());
        int row=baseMapper.updateById(question);
        if(row<1){
            throw new ApiException("编辑题目失败");
        }
        return row;
    }

    public void validData(ExQuestion question){
        if(!question.getQuestionType().equals(QuestionTypeEnum.JUDGE.getCode())&&!question.getQuestionType().equals(QuestionTypeEnum.EASY.getCode())){
            if(StringUtils.isBlank(question.getContent())){
                throw new ApiException("题目内容不能为空");
            }
            try {
                JSONObject jsonObject = JSONObject.parseObject(question.getContent());
            }catch (Exception e){
                throw new ApiException("题目内容json格式不正确");
            }
            //确保答案是按字母顺序排序
            String answer=question.getAnswer();
            if(answer.contains(",")){
                String[] ans = answer.split(",");
                Arrays.sort(ans);
                question.setAnswer(String.join(",",ans));
            }
        }
        
    }

    public void checkUserAllowed(ExQuestion question) {
        SysUser currentUser= SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return;
        }
        if(currentUser.getUserType().equals(UserTypeEnum.STUDENT.getCode())){
            throw new ApiException("没有权限操作");
        }
        if(question.getCompanyId()!=null&&!currentUser.getCompanyId().equals(question.getCompanyId())){
            throw new ApiException("没有权限操作其他企业题目");
        }
    }

    @Override
    public int deleteQuestionById(Long questionId) {
        checkUserAllowed(baseMapper.selectById(questionId));
        return baseMapper.deleteById(questionId);
    }

    @Override
    public List<Map> getExerciseQuestionList(Long bankId) {
        return baseMapper.getExerciseQuestionList(bankId,SecurityUtils.getUserId());
    }

    @Override
    public ExQuestion getExerciseQuestionById(Long questionId) {
        return baseMapper.getExeriseQuestionById(questionId,SecurityUtils.getUserId());
    }

    @Override
    public List<ExQuestion> getExerciseQuestionByIds(List<Long> questionIds) {
        if(questionIds==null|| questionIds.isEmpty()){
            throw new ApiException("题目id列表不能为空");
        }
        if(questionIds.size()>30){
            throw new ApiException("批量id数量超过阀值");
        }
        return baseMapper.getExeriseQuestionByIds(questionIds,SecurityUtils.getUserId());
    }

    @Override
    public List<Map> getPaperQuestionList(Long paperId,Integer viewType) {
        LambdaQueryWrapper<ExPaperStudent> lambdaQueryWrapper = Wrappers.<ExPaperStudent>lambdaQuery()
                .eq(ExPaperStudent::getPaperId, paperId)
                .eq(ExPaperStudent::getStudentId, SecurityUtils.getUserId());
        ExPaperStudent paperStudent=paperStudentMapper.selectOne(lambdaQueryWrapper);
        if(paperStudent==null){
            throw new ApiException("您分配的试卷未查询到");
        }
        Long currentDateTime=System.currentTimeMillis();
        if(viewType==1){//更新考试开始时间
            if(paperStudent.getState()!= PaperStudentStateEnum.WAIT_EXAM.getCode()){
                throw new ApiException("考试已完成，不能重复考试");
            }
            ExExamPaper examPaper = examPaperMapper.selectById(paperStudent.getPaperId());
            if(examPaper.getLimited()==1){
                if(paperStudent.getStartTime()!=null && (currentDateTime-paperStudent.getStartTime()>=examPaper.getLimitTime()*60*1000)){
//                    paperStudent.setCompleted(1);
//                    paperStudentMapper.updateById(paperStudent);
                    throw new ApiException("考试已超时，不能再考试");
                }
                LocalDateTime deadline = examPaper.getDeadline();
                if(currentDateTime-deadline.toInstant(ZoneOffset.of("+8")).toEpochMilli()>0){
//                    paperStudent.setCompleted(1);
//                    paperStudentMapper.updateById(paperStudent);
                    throw new ApiException("已过考试截止时间，不能再考试");
                }
            }
            if(paperStudent.getStartTime()==null) {
                int row = paperStudentMapper.updateById(new ExPaperStudent().setId(paperStudent.getId()).setPaperId(paperStudent.getPaperId()).setStudentId(paperStudent.getStudentId()).setStartTime(currentDateTime));
                if (row < 1) {
                    throw new ApiException("设置考试开始时间失败");
                }
            }
        }else{
            if(!Objects.equals(paperStudent.getState(), PaperStudentStateEnum.DONE_REVIEW.getCode())){
//                if(paperStudent.getStartTime()!=null) {//判断考卷是否已完成
//                    ExExamPaper examPaper = examPaperMapper.selectById(paperStudent.getPaperId());
//                    if(examPaper.getLimited()==1) {
//                        if (currentDateTime-paperStudent.getStartTime()>=examPaper.getLimitTime()*60*1000){
//                            paperStudent.setCompleted(1);
//                            paperStudentMapper.updateById(paperStudent);
//                        }
//                    }
//                }
                throw new ApiException("试卷未审批完，无法查看");
            }
        }
        return baseMapper.getPaperQuestionList(paperId,paperStudent.getState(),SecurityUtils.getUserId(),viewType);
    }

    @Override
    public ExQuestion getPaperQuestionById(Long paperId, Long questionId) {
        LambdaQueryWrapper<ExPaperStudent> lambdaQueryWrapper = Wrappers.<ExPaperStudent>lambdaQuery()
                .eq(ExPaperStudent::getPaperId, paperId)
                .eq(ExPaperStudent::getStudentId, SecurityUtils.getUserId());
        ExPaperStudent paperStudent=paperStudentMapper.selectOne(lambdaQueryWrapper);
        if(paperStudent==null){
            throw new ApiException("您分配的试卷未查询到");
        }
        return baseMapper.getPaperQuestionById(paperId,questionId,paperStudent.getState(),SecurityUtils.getUserId());
    }

    @Override
    public List<ExQuestion> getPaperQuestionByIds(Long paperId, List<Long> questionIds) {
        if(questionIds.size()>30){
            throw new ApiException("批量id数量超过阀值");
        }
        LambdaQueryWrapper<ExPaperStudent> lambdaQueryWrapper = Wrappers.<ExPaperStudent>lambdaQuery()
                .eq(ExPaperStudent::getPaperId, paperId)
                .eq(ExPaperStudent::getStudentId, SecurityUtils.getUserId());
        ExPaperStudent paperStudent=paperStudentMapper.selectOne(lambdaQueryWrapper);
        if(paperStudent==null){
            throw new ApiException("您分配的试卷未查询到");
        }
        return baseMapper.getPaperQuestionByIds(paperId,questionIds,paperStudent.getState(),SecurityUtils.getUserId());
    }

    @Override
    public List<Long> getExerciseErrorQuestionList(Long bankId) {
        return baseMapper.getExerciseErrorQuestionList(bankId,SecurityUtils.getUserId());
    }

    @Override
    public List<ExQuestion> selectQuestionByPaperId(Long paperId) {
        return baseMapper.selectQuestionByPaperId(paperId);
    }
}