package com.cdzy.activity.service.impl;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.lang.UUID;
import com.cdzy.activity.component.ImageConfig;
import com.cdzy.activity.enums.ActivityStatus;
import com.cdzy.activity.mapper.ActivityMapper;
import com.cdzy.activity.mapper.ActivityUserMapper;
import com.cdzy.activity.model.Activity;
import com.cdzy.activity.model.ActivityUser;
import com.cdzy.activity.model.vo.ActivityVo;
import com.cdzy.activity.service.ActivityService;
import com.cdzy.activity.uitls.FileUtils;
import com.cdzy.activity.uitls.ImageToBase64Converter;
import com.mybatisflex.core.query.QueryWrapper;
import com.mybatisflex.spring.service.impl.ServiceImpl;
import jakarta.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

import static com.cdzy.activity.model.table.ActivityTableDef.ACTIVITY;

/**
 * 活动状态检测变动。
 *
 * @author attiya
 * @since 2025-09-17
 */
@Service
public class ActivityServiceImpl extends ServiceImpl<ActivityMapper, Activity> implements ActivityService {

    @Resource
    private ActivityMapper activityMapper;

    @Resource
    private ActivityUserMapper activityUserMapper;

    @Resource
    private ImageConfig imageConfig;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void saveActivity(ActivityVo activity) throws IOException {
        MultipartFile activityCover = activity.getActivityCover();
        String convert = null;
        if (activityCover != null) {
            String uuid = UUID.randomUUID().toString();
            String fileExtension = FileUtils.getFileExtension(activityCover);
            String destPath = imageConfig.getActivityUrl() + "/" + uuid + fileExtension;
            FileUtils.copyMultipartFile(activityCover, destPath, true);
            convert = uuid + fileExtension;
        }
        Activity entity = Activity.builder()
                .activityName(activity.getActivityName())
                .activityCover(convert)
                .activitySponsor(activity.getActivitySponsor())
                .activityDescription(activity.getActivityDescription())
                .activityLocation(activity.getActivityLocation())
                .registrationStartTime(activity.getRegistrationStartTime())
                .registrationEndTime(activity.getRegistrationEndTime())
                .startTime(activity.getStartTime())
                .endTime(activity.getEndTime())
                .maxNum(activity.getMaxNum())
                .limitPeople(activity.getLimitPeople())
                .limitRegister(activity.getLimitRegister())
                .status(ActivityStatus.UN_START_REGISTERING)
                .activityType(activity.getActivityType())
                .build();
        activityMapper.insert(entity);

        List<Long> userIds = activity.getUserIds();
        if (userIds != null && !userIds.isEmpty()) {
            List<ActivityUser> list = new ArrayList<>();
            for (Long userId : userIds) {
                list.add(new ActivityUser(entity.getActivityId(), userId));
            }
            activityUserMapper.insertBatch(list);
        }
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateActivity(ActivityVo activity) throws IOException {
        Activity entity = activityMapper.selectOneById(activity.getActivityId());
        if (entity != null) {
            entity.setActivityName(activity.getActivityName());
            MultipartFile activityCover = activity.getActivityCover();
            String convert = entity.getActivityCover();
            if (activityCover != null) {
                String uuid = UUID.randomUUID().toString();
                String fileExtension = FileUtils.getFileExtension(activityCover);
                String destPath = imageConfig.getActivityUrl() + "/" + uuid + fileExtension;
                FileUtils.copyMultipartFile(activityCover, destPath, true);
                FileUtil.del(imageConfig.getActivityUrl() + "/" + convert);
                convert = uuid + fileExtension;
            }
            entity.setActivityCover(convert);
            entity.setActivitySponsor(activity.getActivitySponsor());
            entity.setActivityDescription(activity.getActivityDescription());
            entity.setActivityLocation(activity.getActivityLocation());
            entity.setRegistrationStartTime(activity.getRegistrationStartTime());
            entity.setRegistrationEndTime(activity.getRegistrationEndTime());
            entity.setStartTime(activity.getStartTime());
            entity.setEndTime(activity.getEndTime());
            entity.setMaxNum(activity.getMaxNum());
            entity.setLimitPeople(activity.getLimitPeople());
            entity.setLimitRegister(activity.getLimitRegister());
            entity.setActivityType(activity.getActivityType());
            activityMapper.update(entity);


            QueryWrapper activityUserQueryWrapper = new QueryWrapper()
                    .eq(ActivityUser::getActivityId, activity.getActivityId());
            activityUserMapper.deleteByQuery(activityUserQueryWrapper);
            List<Long> userIds = activity.getUserIds();
            if (userIds != null && !userIds.isEmpty()) {
                List<ActivityUser> list = new ArrayList<>();
                for (Long userId : userIds) {
                    list.add(new ActivityUser(entity.getActivityId(), userId));
                }
                activityUserMapper.insertBatch(list);
            }
        } else {
            throw new RuntimeException("该活动不存在");
        }
    }

    @Override
    public void checkStatus() {
        LocalDateTime now = LocalDateTime.now();
        QueryWrapper queryWrapper = QueryWrapper.create()
                .where(ACTIVITY.STATUS.ne(ActivityStatus.FINISHED));
        List<Activity> activities = activityMapper.selectListByQuery(queryWrapper);
        if (activities != null && !activities.isEmpty()) {
            for (Activity activity : activities) {
                switch (activity.getStatus()) {
                    case ActivityStatus.UN_START_REGISTERING:
                        if (now.isAfter(activity.getRegistrationStartTime())) {
                            activity.setStatus(ActivityStatus.REGISTERING);
                        }
                        break;
                    case ActivityStatus.REGISTERING:
                        if (now.isAfter(activity.getRegistrationEndTime())) {
                            activity.setStatus(ActivityStatus.STOP_REGISTER);
                        }
                        break;
                    case ActivityStatus.STOP_REGISTER:
                        if (now.isAfter(activity.getStartTime())) {
                            activity.setStatus(ActivityStatus.STARTED);
                        }
                        break;
                    case ActivityStatus.STARTED:
                        if (now.isAfter(activity.getStartTime())) {
                            activity.setStatus(ActivityStatus.FINISHED);
                        }
                        break;
                }
            }
            updateBatch(activities);
        }
    }
}