package com.zdjizhi.etl;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.date.DateUtil;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.LinkedHashMap;
import java.util.Map;

import static com.zdjizhi.common.FlowWriteConfig.LOG_AGGREGATE_DURATION;


/**
 * @author 94976
 */
public class DnsRelationProcessFunction extends ProcessWindowFunction<Map<String, Object>, Map<String, Object>, Tuple3<String, String, String>, TimeWindow> {

    private static final Logger logger = LoggerFactory.getLogger(DnsRelationProcessFunction.class);

    /**
     * 拆分dns_record
     * 聚合统计
     * 五种：a/aaaa/cname/mx/ns
     *
     * @param elements
     * @return
     */
    @Override
    public void process(Tuple3<String, String, String> keys, Context context, Iterable<Map<String, Object>> elements, Collector<Map<String, Object>> out) {

        try {
            long sessions = 0L;
            long startTime = DateUtil.currentSeconds();
            long endTime = DateUtil.currentSeconds();
            for (Map<String, Object> log : elements) {
                sessions++;
                long logStartTime = Convert.toLong(log.get("start_time"));
                startTime = logStartTime < startTime ? logStartTime : startTime;
                endTime = logStartTime > endTime ? logStartTime : endTime;
            }
            Map<String, Object> newDns = new LinkedHashMap<>();
            newDns.put("start_time", startTime);
            newDns.put("end_time", endTime + LOG_AGGREGATE_DURATION);
            newDns.put("record_type", keys.f0);
            newDns.put("qname", keys.f1);
            newDns.put("record", keys.f2);
            newDns.put("sessions", sessions);
            out.collect(newDns);
        } catch (Exception e) {
            logger.error("dns relation 日志聚合失败: {}", e);
        }
    }
}