using System;
using System.Runtime.Serialization;

namespace MECF.Framework.Common.CommonData
{
	[Serializable]
	[DataContract]
	public class FdcDataItem
	{
		[DataMember]
		public string Name { get; set; }

		[DataMember]
		public float MaxValue { get; set; }

		[DataMember]
		public float MinValue { get; set; }

		[DataMember]
		public float MeanValue
		{
			get
			{
				if (SampleCount == 0)
				{
					return 0f;
				}
				return Total / (float)SampleCount;
			}
		}

		[DataMember]
		public float StdValue
		{
			get
			{
				if (SampleCount <= 1)
				{
					return 0f;
				}
				return (float)Math.Sqrt(Math.Abs((SqrtTotal - 2f * (Total / (float)SampleCount) * Total + (float)SampleCount * (Total / (float)SampleCount) * (Total / (float)SampleCount)) / (float)(SampleCount - 1)));
			}
		}

		[DataMember]
		public float SetPoint { get; set; }

		[DataMember]
		public float Total { get; set; }

		[DataMember]
		public float SqrtTotal { get; set; }

		[DataMember]
		public int SampleCount { get; set; }

		public void Clear()
		{
			MaxValue = float.MinValue;
			MinValue = float.MaxValue;
			SetPoint = 0f;
			Total = 0f;
			SampleCount = 0;
			SqrtTotal = 0f;
		}

		public void Update(float value)
		{
			if (value < MinValue)
			{
				MinValue = value;
			}
			if (value > MaxValue)
			{
				MaxValue = value;
			}
			Total += value;
			SqrtTotal += value * value;
			SampleCount++;
		}
	}
}