package com.moral.api.service.impl;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.moral.api.entity.HistorySecondRadar;
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import com.moral.api.mapper.HistorySecondRadarMapper;
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import com.moral.api.pojo.query.radar.RadarListCond;
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import com.moral.api.pojo.vo.radar.HistorySecondRadarListVo;
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import com.moral.api.pojo.vo.radar.RadarListVo;
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import com.moral.api.service.HistorySecondRadarService;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import org.springframework.stereotype.Service;
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import java.math.BigDecimal;
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import java.math.RoundingMode;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* <p>
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* 服务实现类
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* </p>
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*
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* @author moral
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* @since 2026-05-14
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*/
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@Service
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public class HistorySecondRadarServiceImpl extends ServiceImpl<HistorySecondRadarMapper, HistorySecondRadar> implements HistorySecondRadarService {
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private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
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private static final double HEIGHT_INTERVAL = 7.5;
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@Override
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public RadarListVo radarList(RadarListCond cond) {
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RadarListVo radarListVo = new RadarListVo();
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List<String> time = new ArrayList<>();
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List<HistorySecondRadarListVo> list = this.baseMapper.listRadar(cond);
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List<List<double[]>> pm25 = new ArrayList<>();
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List<List<double[]>> pm10 = new ArrayList<>();
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for(HistorySecondRadarListVo ot : list){
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pm10.add(convertSingleRecordToJson(ot.getRadarDataPm10(),cond.getHigh1(),cond.getHigh2()));
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pm25.add(convertSingleRecordToJson(ot.getRadarDataPm25(),cond.getHigh1(),cond.getHigh2()));
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time.add(ot.getTimeStr());
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}
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radarListVo.setPm25(pm25);
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radarListVo.setTime(time);
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radarListVo.setPm10(pm10);
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return radarListVo;
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}
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private List<double[]> convertSingleRecordToJson(String rawData,int high1,int high2){
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if (rawData == null || rawData.isEmpty()) {
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return new ArrayList<>();
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}
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try {
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// 3. 分割字符串
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String[] valuesStr = rawData.split("\\*");
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// 4. 预分配列表大小，假设约2000个数据，减少扩容
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List<double[]> seriesData = new ArrayList<>(valuesStr.length);
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for (int i = 10; i < valuesStr.length; i++) {
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// 简单的空值检查，避免 NumberFormatException
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if (valuesStr[i].isEmpty()) continue;
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double height = (i + 1) * HEIGHT_INTERVAL;
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if(height> high1 && height < high2){
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double pm25Value = Double.parseDouble(valuesStr[i]);
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pm25Value = new BigDecimal(Double.toString(pm25Value))
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.setScale(1, RoundingMode.HALF_UP)
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.doubleValue();
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// 使用 double 数组存储 [浓度, 高度]，比对象更节省内存
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seriesData.add(new double[]{pm25Value, height});
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}
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}
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// 5. 序列化为 JSON
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return seriesData;
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} catch (Exception e) {
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// 生产环境中建议记录日志，而不是打印堆栈
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System.err.println("处理数据出错: " + e.getMessage());
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return new ArrayList<>();
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}
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}
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}
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