package com.panzhihua.common.listen;

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

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSONObject;
import com.panzhihua.common.exceptions.ServiceException;
import com.panzhihua.common.model.vos.R;
import com.panzhihua.common.model.vos.community.ComMngRealCompanyExcelVO;
import com.panzhihua.common.service.community.CommunityService;
import com.panzhihua.common.utlis.ListUtils;
import com.panzhihua.common.utlis.StringUtils;

import lombok.extern.slf4j.Slf4j;

/**
 * @description: 实有单位导入监听
 * @author: Null
 * @date: 2021/3/11 13:26
 */
@Slf4j
public class ComMngRealCompanyExcelListen extends AnalysisEventListener<ComMngRealCompanyExcelVO> {

    private static final int BATCH_COUNT = 5000;
    private CommunityService communityService;
    private Long communityId;
    private List<ComMngRealCompanyExcelVO> list = new ArrayList<>();

    public ComMngRealCompanyExcelListen(CommunityService communityService, Long communityId) {
        this.communityService = communityService;
        this.communityId = communityId;
    }

    @Override
    public void invoke(ComMngRealCompanyExcelVO comMngRealCompanyExcelVO, AnalysisContext analysisContext) {
        if (StringUtils.isEmpty(comMngRealCompanyExcelVO.getCreditCode())) {
            throw new ServiceException("统一社会信用代码不可为空");
        }
        list.add(comMngRealCompanyExcelVO);
        // 达到BATCH_COUNT了，需要去存储一次数据库，防止数据几万条数据在内存，容易OOM
        if (list.size() >= BATCH_COUNT) {
            log.info("excel导入数据【{}】", JSONObject.toJSONString(list));
            // 根据list中的creditCode来去重
            List<ComMngRealCompanyExcelVO> newVoList = list.stream()
                .filter(ListUtils.distinctByKey(ComMngRealCompanyExcelVO::getCreditCode)).collect(Collectors.toList());
            R r = this.communityService.listSaveMngRealCompanyExcelVO(newVoList, this.communityId);
            if (!R.isOk(r)) {
                throw new ServiceException(r.getMsg());
            }
            list.clear(); // 清空list
        }

    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        log.info("excel导入数据【{}】", JSONObject.toJSONString(list));
        // 根据list中的creditCode来去重
        List<ComMngRealCompanyExcelVO> newVoList = list.stream()
            .filter(ListUtils.distinctByKey(ComMngRealCompanyExcelVO::getCreditCode)).collect(Collectors.toList());
        R r = this.communityService.listSaveMngRealCompanyExcelVO(newVoList, this.communityId);// 确保最后遗留的数据保存在数据库中
        if (!R.isOk(r)) {
            throw new ServiceException(r.getMsg());
        }
    }
}