package com.ycl.jxkg.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ycl.jxkg.domain.entity.ExamPaper;
import com.ycl.jxkg.domain.entity.TaskExam;
import com.ycl.jxkg.domain.entity.TextContent;
import com.ycl.jxkg.domain.entity.User;
import com.ycl.jxkg.domain.task.TaskItemObject;
import com.ycl.jxkg.mapper.ExamPaperMapper;
import com.ycl.jxkg.mapper.TaskExamMapper;
import com.ycl.jxkg.service.TaskExamService;
import com.ycl.jxkg.service.TextContentService;
import com.ycl.jxkg.service.enums.ActionEnum;
import com.ycl.jxkg.utils.DateTimeUtil;
import com.ycl.jxkg.utils.JsonUtil;
import com.ycl.jxkg.domain.vo.admin.exam.ExamResponseVO;
import com.ycl.jxkg.domain.vo.admin.task.TaskPageRequestVO;
import com.ycl.jxkg.domain.vo.admin.task.TaskRequestVO;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

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

@Service
@RequiredArgsConstructor
public class TaskExamServiceImpl extends ServiceImpl<TaskExamMapper,TaskExam> implements TaskExamService {

    private final TaskExamMapper taskExamMapper;
    private final TextContentService textContentService;
    private final ExamPaperMapper examPaperMapper;

    @Override
    public PageInfo<TaskExam> page(TaskPageRequestVO requestVM) {
        return PageHelper.startPage(requestVM.getPageIndex(), requestVM.getPageSize(), "id desc").doSelectPageInfo(() ->
                taskExamMapper.page(requestVM)
        );
    }

    @Override
    @Transactional
    public void edit(TaskRequestVO model, User user) {
        ActionEnum actionEnum = (model.getId() == null) ? ActionEnum.ADD : ActionEnum.UPDATE;
        TaskExam taskExam = new TaskExam();

        if (actionEnum == ActionEnum.ADD) {
            BeanUtils.copyProperties(model, taskExam);
            Date now = new Date();
            taskExam.setCreateUser(user.getId());
            taskExam.setCreateUserName(user.getUserName());
            taskExam.setCreateTime(now);

            //保存任务结构
            TextContent textContent = textContentService.jsonConvertInsert(model.getPaperItems(), now, p -> {
                TaskItemObject taskItemObject = new TaskItemObject();
                taskItemObject.setExamPaperId(p.getId());
                taskItemObject.setExamPaperName(p.getName());
                return taskItemObject;
            });
            textContentService.save(textContent);
            taskExam.setFrameTextContentId(textContent.getId());
            taskExamMapper.insert(taskExam);

        } else {
            TaskExam old = taskExamMapper.selectById(model.getId());
            if (Objects.isNull(old)) {
                throw new RuntimeException("数据不存在");
            }
            BeanUtils.copyProperties(taskExam, old);
            TextContent textContent = textContentService.getById(taskExam.getFrameTextContentId());
            //清空试卷任务的试卷Id，后面会统一设置
            List<Integer> paperIds = JsonUtil.toJsonListObject(textContent.getContent(), TaskItemObject.class)
                    .stream()
                    .map(d -> d.getExamPaperId())
                    .collect(Collectors.toList());
            examPaperMapper.clearTaskPaper(paperIds);

            //更新任务结构
            textContentService.jsonConvertUpdate(textContent, model.getPaperItems(), p -> {
                TaskItemObject taskItemObject = new TaskItemObject();
                taskItemObject.setExamPaperId(p.getId());
                taskItemObject.setExamPaperName(p.getName());
                return taskItemObject;
            });
            textContentService.updateById(textContent);
            taskExamMapper.updateById(old);
        }

        //更新试卷的taskId
        List<Integer> paperIds = model.getPaperItems().stream().map(d -> d.getId()).collect(Collectors.toList());
        examPaperMapper.updateTaskPaper(taskExam.getId(), paperIds);
        model.setId(taskExam.getId());
    }

    @Override
    public TaskRequestVO taskExamToVM(Integer id) {
        TaskExam taskExam = taskExamMapper.selectById(id);
        TaskRequestVO vo = new TaskRequestVO();
        BeanUtils.copyProperties(taskExam, vo);
        TextContent textContent = textContentService.getById(taskExam.getFrameTextContentId());
        List<ExamResponseVO> examResponseVOS = JsonUtil.toJsonListObject(textContent.getContent(), TaskItemObject.class).stream().map(tk -> {
            ExamPaper examPaper = examPaperMapper.selectById(tk.getExamPaperId());
            ExamResponseVO examResponseVO = new ExamResponseVO();
            BeanUtils.copyProperties(examPaper, examResponseVO);
            examResponseVO.setCreateTime(DateTimeUtil.dateFormat(examPaper.getCreateTime()));
            return examResponseVO;
        }).collect(Collectors.toList());
        vo.setPaperItems(examResponseVOS);
        return vo;
    }

    @Override
    public List<TaskExam> getByGradeLevel(Integer gradeLevel) {
        return taskExamMapper.getByGradeLevel(gradeLevel);
    }
}