package com.mindskip.xzs.controller.wechat.student;

import com.mindskip.xzs.base.RestResponse;
import com.mindskip.xzs.controller.wechat.BaseWechatApiController;
import com.mindskip.xzs.domain.*;
import com.mindskip.xzs.domain.enums.ExamPaperAnswerStatusEnum;
import com.mindskip.xzs.domain.enums.QuestionTypeEnum;
import com.mindskip.xzs.event.CalculateExamPaperAnswerCompleteEvent;
import com.mindskip.xzs.event.UserEvent;
import com.mindskip.xzs.service.ExamPaperAnswerService;
import com.mindskip.xzs.service.ExamPaperService;
import com.mindskip.xzs.service.SubjectService;
import com.mindskip.xzs.service.enums.ResultEnum;
import com.mindskip.xzs.utility.DateTimeUtil;
import com.mindskip.xzs.utility.ExamUtil;
import com.mindskip.xzs.utility.PageInfoHelper;
import com.mindskip.xzs.viewmodel.admin.exam.ExamPaperEditRequestVM;
import com.mindskip.xzs.viewmodel.student.exampaper.ExamPaperAnswerPageResponseVM;
import com.mindskip.xzs.viewmodel.student.exampaper.ExamPaperAnswerPageVM;
import com.mindskip.xzs.viewmodel.student.exampaper.ExamPaperSubmitResult;
import com.github.pagehelper.PageInfo;
import com.mindskip.xzs.viewmodel.student.exam.ExamPaperReadVM;
import com.mindskip.xzs.viewmodel.student.exam.ExamPaperSubmitItemVM;
import com.mindskip.xzs.viewmodel.student.exam.ExamPaperSubmitVM;
import lombok.AllArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.validation.Valid;
import java.util.*;
import java.util.stream.Collectors;


/**
 * @version 2.2.0
 * @description: 答卷
 * Copyright (C), 2020-2021, 武汉思维跳跃科技有限公司
 * @date 2021 /9/7 9:45
 */
@Controller("WechatStudentExamPaperAnswerController")
@RequestMapping(value = "/api/wx/student/exampaper/answer")
@AllArgsConstructor
@ResponseBody
public class ExamPaperAnswerController extends BaseWechatApiController {

    private final ExamPaperAnswerService examPaperAnswerService;
    private final SubjectService subjectService;
    private final ApplicationEventPublisher eventPublisher;
    private final ExamPaperService examPaperService;

    /**
     * 答卷分页
     *
     * @param model the model
     * @return the rest response
     */
    @RequestMapping(value = "/pageList", method = RequestMethod.POST)
    public RestResponse<PageInfo<ExamPaperAnswerPageResponseVM>> pageList(@Valid ExamPaperAnswerPageVM model) {
        model.setCreateUser(getCurrentUser().getId());
        PageInfo<ExamPaperAnswer> pageInfo = examPaperAnswerService.studentPage(model);
        PageInfo<ExamPaperAnswerPageResponseVM> page = PageInfoHelper.copyMap(pageInfo, e -> {
            ExamPaperAnswerPageResponseVM vm = modelMapper.map(e, ExamPaperAnswerPageResponseVM.class);
            Subject subject = subjectService.selectById(vm.getSubjectId());
            vm.setDoTime(ExamUtil.secondToVM(e.getDoTime()));
            vm.setSystemScore(ExamUtil.scoreToVM(e.getSystemScore()));
            vm.setUserScore(ExamUtil.scoreToVM(e.getUserScore()));
            vm.setPaperScore(ExamUtil.scoreToVM(e.getPaperScore()));
            vm.setSubjectName(subject.getName());
            vm.setCreateTime(DateTimeUtil.dateFormat(e.getCreateTime()));
            return vm;
        });
        return RestResponse.ok(page);
    }


    /**
     * 答卷批改
     *
     * @param request the request
     * @return the rest response
     */
    @RequestMapping(value = "/judgeSubmit", method = RequestMethod.POST)
    public RestResponse judgeSubmit(HttpServletRequest request) {
        ExamPaperSubmitVM examPaperSubmitVM = requestToJudgeExamPaperSubmitVM(request);
        boolean notJudge = examPaperSubmitVM.getAnswerItems().stream().anyMatch(i -> i.getDoRight() == null && i.getScore() == null);
        if (notJudge) {
            return RestResponse.fail(2, "有未批改题目");
        }

        ExamPaperAnswer examPaperAnswer = examPaperAnswerService.selectById(examPaperSubmitVM.getId());
        ExamPaperAnswerStatusEnum examPaperAnswerStatusEnum = ExamPaperAnswerStatusEnum.fromCode(examPaperAnswer.getStatus());
        if (examPaperAnswerStatusEnum == ExamPaperAnswerStatusEnum.Complete) {
            return RestResponse.fail(3, "试卷已完成");
        }
        ExamPaperSubmitResult examPaperSubmitResult = examPaperAnswerService.judge(examPaperSubmitVM, getCurrentUser());
        User user = getCurrentUser();
        UserEventLog userEventLog = new UserEventLog(user.getId(), user.getUserName(), user.getRealName(), new Date());
        String content = user.getUserName() + " 批改试卷：" + examPaperAnswer.getPaperName() + " 得分：" + examPaperSubmitResult.getMessage();
        userEventLog.setContent(content);
        eventPublisher.publishEvent(new UserEvent(userEventLog));
        return RestResponse.ok(examPaperSubmitResult.getMessage());
    }


    /**
     * 试卷提交
     *
     * @param request the request
     * @return the rest response
     */
    @RequestMapping(value = "/answerSubmit", method = RequestMethod.POST)
    public RestResponse answerSubmit(HttpServletRequest request) {
        ExamPaperSubmitVM examPaperSubmitVM = requestToExamPaperSubmitVM(request);
        User user = getCurrentUser();
        ExamPaperSubmitResult examPaperSubmitResult = examPaperAnswerService.calculateExamPaperAnswer(examPaperSubmitVM, user);
        if (ResultEnum.FAIL == examPaperSubmitResult.getResultEnum()) {
            return RestResponse.fail(2, examPaperSubmitResult.getMessage());
        }
        ExamPaperAnswerInfo examPaperAnswerInfo = examPaperSubmitResult.getExamPaperAnswerInfo();
        ExamPaperAnswer examPaperAnswer = examPaperAnswerInfo.getExamPaperAnswer();
        Integer userScore = examPaperAnswer.getUserScore();
        String scoreVm = ExamUtil.scoreToVM(userScore);
        UserEventLog userEventLog = new UserEventLog(user.getId(), user.getUserName(), user.getRealName(), new Date());
        String content = user.getUserName() + " 提交试卷：" + examPaperAnswerInfo.getExamPaper().getName()
                + " 得分：" + scoreVm
                + " 耗时：" + ExamUtil.secondToVM(examPaperAnswer.getDoTime());
        userEventLog.setContent(content);
        eventPublisher.publishEvent(new CalculateExamPaperAnswerCompleteEvent(examPaperAnswerInfo));
        eventPublisher.publishEvent(new UserEvent(userEventLog));
        return RestResponse.ok(scoreVm);
    }


    /**
     * 答卷查看
     *
     * @param id the id
     * @return the rest response
     */
    @PostMapping(value = "/read/{id}")
    public RestResponse<ExamPaperReadVM> read(@PathVariable Integer id) {
        ExamPaperReadVM vm = new ExamPaperReadVM();
        ExamPaperAnswer examPaperAnswer = examPaperAnswerService.selectById(id);
        ExamPaperEditRequestVM paper = examPaperService.examPaperToVM(examPaperAnswer.getExamPaperId());
        ExamPaperSubmitVM answer = examPaperAnswerService.examPaperAnswerToVM(examPaperAnswer.getId());
        vm.setPaper(paper);
        vm.setAnswer(answer);
        return RestResponse.ok(vm);
    }


    private ExamPaperSubmitVM requestToExamPaperSubmitVM(HttpServletRequest request) {
        ExamPaperSubmitVM examPaperSubmitVM = new ExamPaperSubmitVM();
        examPaperSubmitVM.setId(Integer.parseInt(request.getParameter("id")));
        examPaperSubmitVM.setDoTime(Integer.parseInt(request.getParameter("doTime")));
        List<String> parameterNames = Collections.list(request.getParameterNames()).stream()
                .filter(n -> n.contains("_"))
                .collect(Collectors.toList());
        //题目答案按序号分组
        Map<String, List<String>> questionGroup = parameterNames.stream().collect(Collectors.groupingBy(p -> p.substring(0, p.indexOf("_"))));
        List<ExamPaperSubmitItemVM> answerItems = new ArrayList<>();
        questionGroup.forEach((k, v) -> {
            ExamPaperSubmitItemVM examPaperSubmitItemVM = new ExamPaperSubmitItemVM();
            String p = v.get(0);
            String[] keys = p.split("_");
            examPaperSubmitItemVM.setQuestionId(Integer.parseInt(keys[1]));
            examPaperSubmitItemVM.setItemOrder(Integer.parseInt(keys[0]));
            QuestionTypeEnum typeEnum = QuestionTypeEnum.fromCode(Integer.parseInt(keys[2]));
            if (v.size() == 1) {
                String content = request.getParameter(p);
                examPaperSubmitItemVM.setContent(content);
                if (typeEnum == QuestionTypeEnum.MultipleChoice) {
                    examPaperSubmitItemVM.setContentArray(Arrays.asList(content.split(",")));
                } else if (typeEnum == QuestionTypeEnum.GapFilling) {
                    examPaperSubmitItemVM.setContentArray(Arrays.asList(content));
                }
            } else {  //多个空 填空题
                List<String> answers = v.stream().sorted(Comparator.comparingInt(ExamUtil::lastNum)).map(inputKey -> request.getParameter(inputKey)).collect(Collectors.toList());
                examPaperSubmitItemVM.setContentArray(answers);
            }
            answerItems.add(examPaperSubmitItemVM);
        });
        examPaperSubmitVM.setAnswerItems(answerItems);
        return examPaperSubmitVM;
    }

    private ExamPaperSubmitVM requestToJudgeExamPaperSubmitVM(HttpServletRequest request) {
        Integer answerId = Integer.parseInt(request.getParameter("answerId"));
        ExamPaperSubmitVM examPaperSubmitVM = examPaperAnswerService.examPaperAnswerToVM(answerId);
        List<String> parameterNames = Collections.list(request.getParameterNames()).stream()
                .filter(n -> n.contains("_"))
                .collect(Collectors.toList());
        parameterNames.forEach(judge -> {
            String[] keys = judge.split("_");
            examPaperSubmitVM.getAnswerItems().stream()
                    .filter(d -> d.getId().equals(Integer.parseInt(keys[1])))
                    .findFirst().ifPresent(item ->
                    {
                        if (StringUtils.isBlank(request.getParameter(judge))) {
                            item.setScore(null);
                        } else {
                            item.setScore(request.getParameter(judge));
                        }
                    }
            );
        });
        return examPaperSubmitVM;
    }
}