using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DTS.Common.Import.Persist
{
    public class PersistCalculator : IPersistCalculator
    {

        private double _done;
        private double _total;

        public double ProgressValue { get => _done / _total; }

        public void AddDone(double value)
        {
            _done += value;
        }

        public void AddDone()
        {
            _done++;
        }

        public void AddToTotal(double value)
        {
            if (value < 0)
            {
                throw new ArgumentOutOfRangeException("value", "value should not be less or equal to zero.");
            }
            _total += value;
        }

    }

    public interface IPersistCalculator
    {
        void AddDone();
        void AddDone(double value);
        double ProgressValue { get; }
        void AddToTotal(double value);

    }
}