package com.panzhihua.common.listen;

import java.util.ArrayList;
import java.util.List;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.exception.ExcelDataConvertException;
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.ComCvtServeExcelVO;
import com.panzhihua.common.service.community.CommunityService;

import lombok.extern.slf4j.Slf4j;

/**
 * @description: 便民服务导入监听
 * @author: Null
 * @date: 2021/3/11 13:26
 */
@Slf4j
public class ComCvtServeExcelListen extends AnalysisEventListener<ComCvtServeExcelVO> {

    private static final int BATCH_COUNT = 5000;
    private CommunityService communityService;
    private Long communityId;
    private List<ComCvtServeExcelVO> list = new ArrayList<>();
    public ComCvtServeExcelListen(CommunityService communityService, Long communityId) {
        this.communityService = communityService;
        this.communityId = communityId;
    }

    @Override
    public void invoke(ComCvtServeExcelVO comCvtServeExcelVO, AnalysisContext analysisContext) {
        list.add(comCvtServeExcelVO);
        // 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));
            R r = this.communityService.listSaveConvenientServeExcelVO(list, this.communityId);
            if (!R.isOk(r)) {
                throw new ServiceException(r.getMsg());
            }
            // 清空list
            list.clear();
        }

    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        log.info("excel导入数据【{}】", JSONObject.toJSONString(list));
        R r = this.communityService.listSaveConvenientServeExcelVO(list, 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());
        }
    }

    /**
     * 在转换异常
     * 
     * @param exception
     * @param context
     * @throws Exception
     */
    @Override
    public void onException(Exception exception, AnalysisContext context) throws ServiceException {
        log.error("抛出异常:{}", exception.getMessage());
        if (exception instanceof ExcelDataConvertException) {
            ExcelDataConvertException excelDataConvertException = (ExcelDataConvertException)exception;
            log.error("第{}行，第{}列解析异常，数据为:{}", excelDataConvertException.getRowIndex(),
                excelDataConvertException.getColumnIndex(), excelDataConvertException.getCellData());
        } else {
            throw new ServiceException(exception.getMessage());
        }
    }
}