package com.gunshi.project.xyt.util;


import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.List;
import java.util.Map;


public class DataHandleUtil {


    public static BigDecimal calcData(BigDecimal rz, Map<BigDecimal, BigDecimal> map,List<BigDecimal> list) {
        //库容曲线中最近的一组水位
        BigDecimal lowerRz = new BigDecimal(0);
        BigDecimal upperRz = new BigDecimal(0);

        //库容曲线中最近的一组水位对应的库容
        BigDecimal lowerW = new BigDecimal(0);
        BigDecimal upperW = new BigDecimal(0);

        for(int i=0;i<list.size();i++){
            if (rz.compareTo(list.get(i)) >= 0 && rz.compareTo(list.get(i+1)) <= 0) {
                lowerRz = list.get(i);
                upperRz = list.get(i+1);

                lowerW = map.get(lowerRz);
                upperW = map.get(upperRz);
                break;
            }
        }
        BigDecimal diff = rz.subtract(lowerRz);
        return lowerW.add(diff.multiply(upperW.subtract(lowerW)).divide(upperRz.subtract(lowerRz),2,RoundingMode.UP));
    }


}