package com.walker.di.excel;

import com.alibaba.excel.context.AnalysisContext;
import com.walker.di.BusinessImportException;
import com.walker.infrastructure.ApplicationRuntimeException;

import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 支持批量加载导入的监听器实现。
 * @author 时克英
 * @date 2023-02-03
 */
public class BatchDataListener extends DefaultDataListener{

    // 处理数据计数器
    private long currentDataRowCount = 0;
    private long saveSizeOnce = 200;
    private long sleepMillSeconds = 0;

    public BatchDataListener(LoadListener loadListener) {
        super(loadListener);
        if(loadListener == null){
            throw new IllegalArgumentException("LoadListener is required!");
        }
    }

    @Override
    public void invoke(Map<Integer, String> integerStringMap, AnalysisContext analysisContext) {
//        logger.debug(integerStringMap.toString());
        this.increaseOneData(integerStringMap);
        this.currentDataRowCount ++;

        // 到达200条后，自动保存
        if(this.currentDataRowCount >= this.saveSizeOnce){
//            try {
//                this.loadListener.onSave(rows, this.headers);
//                this.rows.clear();
//                this.rows = null;
//            } catch (DataImportException e) {
//                throw new ApplicationRuntimeException("loadListener保存导入数据错误:" + e.getMessage(), e);
//            }
            this.doSaveOnce();
            // 复位行计数器
            this.currentDataRowCount = 0;

            if(sleepMillSeconds > 0){
                try {
                    TimeUnit.MILLISECONDS.sleep(sleepMillSeconds);
                    logger.debug("-----> sleep: " + sleepMillSeconds);
                } catch (InterruptedException e) {
                    logger.error("间隔等待(防止CUP过高)，出现异常:" + e.getMessage());
                }
            }
        }
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        logger.info(".........Excel操作完成!");
        if(this.rows != null){
            logger.warn("excel已加载完毕，发现存在未保存数据，立即保存:" + this.rows.size());
            this.doSaveOnce();
        }
        if(this.headers != null){
            this.headers.clear();
        }
    }

    private void doSaveOnce(){
        try {
            this.loadListener.onSave(rows, this.headers);
            this.rows.clear();
            this.rows = null;

        } catch (BusinessImportException e) {
            // 2023-02-06 如果业务保存数据出错，中断操作，同时刷新并关闭错误记录器，确保能记录之前的校验错误内容。
            if(this.loadListener.getErrorWriter() != null){
                this.loadListener.getErrorWriter().close();
            }
            throw new ApplicationRuntimeException("loadListener保存导入数据错误:" + e.getMessage(), e);
//            logger.error("loadListener保存导入数据错误, 继续执行完，防止 errorWrite中断写入。 error:" + e.getMessage(), e);
        }
    }

    /**
     * 设置每次保存记录数量，这是数据库写入数量。
     * @param saveSizeOnce
     */
    public void setSaveSizeOnce(long saveSizeOnce) {
        this.saveSizeOnce = saveSizeOnce;
    }

    public void setSleepMillSeconds(long sleepMillSeconds) {
        this.sleepMillSeconds = sleepMillSeconds;
    }
}