package dev.dinauer.metrics.service.model;

import java.util.Objects;

public class Metric
{
    private int count;
    private double sum;
    private double average;
    private Double min;
    private Double max;

    public Metric()
    {
        this.count = 0;
        this.sum = 0;
        this.average = 0.0F;
        this.min = null;
        this.max = null;
    }

    public void add(double value)
    {
        count = count + 1;
        sum = sum + value;
        average = calculateAverage(sum, count);
        if (Objects.isNull(min) || value < min)
        {
            min = value;
        }
        if (Objects.isNull(max) || value > max)
        {
            max = value;
        }
    }

    private double calculateAverage(double sum, int count)
    {
        if (count == 0)
        {
            return 0;
        }
        return sum / count;
    }

    public int getCount()
    {
        return count;
    }

    public double getSum()
    {
        return sum;
    }

    public double getAverage()
    {
        return average;
    }

    public Double getMin()
    {
        return min;
    }

    public Double getMax()
    {
        return max;
    }
}