package com.mindskip.xzs.service.impl;

import ch.qos.logback.core.joran.util.beans.BeanUtil;
import com.alibaba.fastjson.JSON;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.mindskip.xzs.base.RestResponse;
import com.mindskip.xzs.context.WebContext;
import com.mindskip.xzs.domain.ExamPaperAnswer;
import com.mindskip.xzs.domain.Question;
import com.mindskip.xzs.domain.SelfPractice;
import com.mindskip.xzs.domain.enums.PracticeQuestionTypeEnum;
import com.mindskip.xzs.domain.enums.PracticeTypeEnum;
import com.mindskip.xzs.domain.enums.QuestionTypeEnum;
import com.mindskip.xzs.domain.vo.QuestionContentVO;
import com.mindskip.xzs.domain.vo.QuestionVO;
import com.mindskip.xzs.domain.vo.SelfPracticeVO;
import com.mindskip.xzs.domain.vo.SubjectQuestionVO;
import com.mindskip.xzs.repository.QuestionMapper;
import com.mindskip.xzs.repository.QuestionSubjectMapper;
import com.mindskip.xzs.repository.SelfPracticeMapper;
import com.mindskip.xzs.repository.SubjectMapper;
import com.mindskip.xzs.service.SelfPracticeService;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * @author：xp
 * @date：2024/5/9 16:16
 */
@Service
@RequiredArgsConstructor
public class SelfPracticeServiceImpl implements SelfPracticeService {

    private final SelfPracticeMapper selfPracticeMapper;
    private final WebContext webContext;
    private final QuestionSubjectMapper questionSubjectMapper;
    private final SubjectMapper subjectMapper;
    private final QuestionMapper questionMapper;

    @Override
    public RestResponse add(SelfPracticeVO vo) {
        SelfPractice entity = new SelfPractice();
        BeanUtils.copyProperties(vo, entity);
        entity.setSubjects(JSON.toJSONString(vo.getSubjects()));
        entity.setCreateTime(new Date());
        entity.setUpdateTime(new Date());
        entity.setDeleted(0);
        entity.setDoNum(0);
        entity.setUserId(webContext.getCurrentUser().getId());
        selfPracticeMapper.add(entity);
        return RestResponse.ok("创建成功");
    }

    @Override
    public RestResponse page(SelfPracticeVO query) {
        if (! Objects.equals(3, webContext.getCurrentUser().getRole())) {
            query.setUserId(webContext.getCurrentUser().getId());
        }
        PageInfo<SelfPracticeVO> info = PageHelper.startPage(query.getPageNum(), query.getPageSize()).doSelectPageInfo(() ->
                selfPracticeMapper.page(query));
        info.getList().stream().forEach(item -> {
            List<Integer> subjects = JSON.parseArray(item.getSubjectString(), Integer.class);
            item.setSubjects(subjects);
            List<String> subjectNames = subjectMapper.selectSubjectName(subjects);
            if (! CollectionUtils.isEmpty(subjectNames)) {
                item.setSubjectNames(subjectNames.stream().collect(Collectors.joining("、")));
            }
            item.setTotalQuestionNum(questionSubjectMapper.countQuestionNum(subjects));
        });
        return RestResponse.ok(info);
    }

    @Override
    public RestResponse remove(List<Integer> ids) {
        selfPracticeMapper.remove(ids);
        return RestResponse.ok("删除成功");
    }

    @Override
    public RestResponse startPractice(Integer id) {
        SelfPractice en = selfPracticeMapper.selectById(id);
        if (Objects.isNull(en)) {
            throw new RuntimeException("练习不存在");
        }
        List<Integer> subjectIds = JSON.parseArray(en.getSubjects(), Integer.class);
        if (PracticeTypeEnum.ORDERED.getValue().equals(en.getPracticeType())) {
            List<SubjectQuestionVO> list = new ArrayList<>(2);
            // 顺序做题，把选择的题库的题(id)全部查出来，前端有个序号面板，点击哪道题做哪道
            for (Integer subjectId : subjectIds) {
                String subjectName = subjectMapper.selectSubjectNameById(subjectId);
                // todo根据做题记录查询做没做过
                List<Integer> questionIds = new ArrayList<>();
                if (PracticeQuestionTypeEnum.ALL.getValue().equals(en.getQuestionType())) {
                    questionIds = questionSubjectMapper.questionsBySubjectId(subjectId);
                } else {
                    questionIds = questionSubjectMapper.questionsBySubjectIdAndQuestionType(subjectId, PracticeQuestionTypeEnum.getDataBaseValueByValue(en.getQuestionType()));
                }
                SubjectQuestionVO subjectQuestionVO = new SubjectQuestionVO();
                subjectQuestionVO.setSubjectId(subjectId);
                subjectQuestionVO.setSubjectName(subjectName);
                subjectQuestionVO.setQuestionIds(questionIds);
                list.add(subjectQuestionVO);
            }
            return RestResponse.ok(list);
        } else if (PracticeTypeEnum.RANDOM.getValue().equals(en.getPracticeType())) {
            // 随机练习，是一道题一道题练习
            List<QuestionVO> one = questionSubjectMapper.getRandomQuestionId(subjectIds, PracticeQuestionTypeEnum.getDataBaseValueByValue(en.getQuestionType()), 1);
            if (one.size() < 1) {
                throw new RuntimeException("没有找到题目，可能所选课目包含题目不足");
            }
            QuestionVO questionVO = one.get(0);
            jsonQuestion(questionVO);
            return RestResponse.ok(questionVO);
        }
        return RestResponse.ok();
    }

    @Override
    public RestResponse subjectQuestionNum(List<Integer> subjectIds) {
        Integer num = questionSubjectMapper.countQuestionNum(subjectIds);
        return RestResponse.ok(num);
    }

    @Override
    public RestResponse randomOneQuestion(Integer id) {
        SelfPractice en = selfPracticeMapper.selectById(id);
        if (Objects.isNull(en)) {
            throw new RuntimeException("练习不存在");
        }
        List<Integer> subjectIds = JSON.parseArray(en.getSubjects(), Integer.class);
        List<QuestionVO> one = questionSubjectMapper.getRandomQuestionId(subjectIds, PracticeQuestionTypeEnum.getDataBaseValueByValue(en.getQuestionType()), 1);
        if (one.size() < 1) {
            throw new RuntimeException("没有找到题目，可能所选课目包含题目不足");
        }
        QuestionVO questionVO = one.get(0);
        jsonQuestion(questionVO);

        return RestResponse.ok(questionVO);
    }

    /**
     * 处理题目内容JSON
     *
     * @param questionVO
     */
    public void jsonQuestion(QuestionVO questionVO) {
        if (StringUtils.hasText(questionVO.getContentJson())) {
            QuestionContentVO questionContent = JSON.parseObject(questionVO.getContentJson(), QuestionContentVO.class);
            questionVO.setContent(questionContent);
        }
        if (QuestionTypeEnum.MultipleChoice.getCode().equals(questionVO.getQuestionType())) {
            // 多选题需要返回答案数量，学员选中对应数量才查询答案
            if (StringUtils.hasText(questionVO.getCorrect())) {
                questionVO.setAnswerNum(questionVO.getCorrect().split(",").length);
            }
        }
        questionVO.setContentJson("");
        questionVO.setCorrect("");
        questionVO.getContent().setCorrect("");
        questionVO.getContent().setAnalyze("");
    }
}