package com.ycl.jxkg.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.benmanes.caffeine.cache.Cache;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.ycl.jxkg.base.Result;
import com.ycl.jxkg.context.WebContext;
import com.ycl.jxkg.domain.entity.EducationResource;
import com.ycl.jxkg.domain.entity.Subject;
import com.ycl.jxkg.domain.entity.StudyRecord;
import com.ycl.jxkg.domain.vo.admin.education.EducationResourceVO;
import com.ycl.jxkg.mapper.ClassesUserMapper;
import com.ycl.jxkg.mapper.EducationResourceMapper;
import com.ycl.jxkg.mapper.SubjectMapper;
import com.ycl.jxkg.service.EducationResourceService;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

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

/**
 * @author：flq
 * @date：2024/6/18 10:53
 */
@Service
@RequiredArgsConstructor
public class EducationResourceServiceImpl implements EducationResourceService {

    private final EducationResourceMapper mapper;
    private final SubjectMapper subjectMapper;
    private final WebContext webContext;
    private final ClassesUserMapper classesUserMapper;
    @Autowired
    private Cache<String, Object> caffeineCache;
    @Override
    public Result add(EducationResourceVO form) {
        EducationResource educationResource = new EducationResource();
        BeanUtils.copyProperties(form, educationResource);
        educationResource.setContentUrl(JSON.toJSONString(form.getContentUrl()));
        if (!CollectionUtils.isEmpty(form.getAttachment())) {
            educationResource.setAttachment(JSON.toJSONString(form.getAttachment()));
        }
        educationResource.setCreateTime(new Date());
        educationResource.setUpdateTime(new Date());
        educationResource.setCreateUser(webContext.getCurrentUser().getId());
        mapper.add(educationResource);
        return Result.ok("添加成功");
    }

    @Override
    public Result update(EducationResourceVO form) {
        if (Objects.isNull(form.getId())) {
            throw new RuntimeException("请选择要修改的数据");
        }
        EducationResource educationResource = new EducationResource();
        BeanUtils.copyProperties(form, educationResource);
        educationResource.setContentUrl(JSON.toJSONString(form.getContentUrl()));
        if (!CollectionUtils.isEmpty(form.getAttachment())) {
            educationResource.setAttachment(JSON.toJSONString(form.getAttachment()));
        } else {
            educationResource.setAttachment("");
        }
        mapper.update(educationResource);
        return Result.ok("修改成功");
    }

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

    @Override
    public Result page(EducationResourceVO query) {
        PageInfo<EducationResourceVO> page = PageHelper.startPage(query.getPageNum(), query.getPageSize()).doSelectPageInfo(() ->
                mapper.page(query));
        page.getList().stream().forEach(item -> {
            item.setContentUrl(JSON.parseObject(item.getContentUrlString(), EducationResourceVO.UploadFile.class));
            item.setAttachment(JSON.parseArray(item.getAttachmentString(), EducationResourceVO.UploadFile.class));
        });
        return Result.ok(page.getList()).put("total", page.getTotal());
    }

    @Override
    public Result studentPage(EducationResourceVO query) {
        Integer id = webContext.getCurrentUser().getId();
        List<Integer> classes = classesUserMapper.getClassesByUserId(id);
        if (CollectionUtils.isEmpty(classes)) {
            //学生没有班级
            List<EducationResourceVO> list = new ArrayList<>();
            return Result.ok(list).put("total", 0);
        }
        query.setClassIds(classes);
        PageInfo<EducationResourceVO> page = PageHelper.startPage(query.getPageNum(), query.getPageSize()).doSelectPageInfo(() ->
                mapper.studentPage(query));
        page.getList().stream().forEach(item -> {
            item.setContentUrl(JSON.parseObject(item.getContentUrlString(), EducationResourceVO.UploadFile.class));
            item.setAttachment(JSON.parseArray(item.getAttachmentString(), EducationResourceVO.UploadFile.class));
        });
        return Result.ok(page.getList()).put("total", page.getTotal());
    }

    @Override
    public Result typeList() {
        List<Subject> subjects = subjectMapper.allSubject();
        return Result.ok(subjects);
    }
    //记录视频时长
    @Override
    public Result recordTime(Integer userId) {
        if (userId ==null){
            throw new RuntimeException("用户id为空");
        }
        StudyRecord studyRecord = (StudyRecord) caffeineCache.getIfPresent("STUDENT_"+userId);
        if (studyRecord != null) {
            //存在缓存
            Date lastTime = studyRecord.getLastTime();
            Date now = new Date();
            studyRecord.setStudyTime(studyRecord.getStudyTime()+(now.getTime()-lastTime.getTime())/1000);
            studyRecord.setLastTime(now);
        }else {
            //不存在缓存
            studyRecord = new StudyRecord();
            studyRecord.setStudentId(userId);
            studyRecord.setStudyTime(0L);
            studyRecord.setLastTime(new Date());
        }
        caffeineCache.put("STUDENT_" + userId, studyRecord);
        return Result.ok();
    }
}