using System;
using System.Collections.ObjectModel;

namespace WeldingCommon.Data.Services.History.Collection
{
    public class RollingCollection<T> : ObservableCollection<T>
    {
        public int MaxCount { get; }
        public RollingCollection(int maxCount)
        {
            if (maxCount <= 0) throw new ArgumentOutOfRangeException(nameof(maxCount));
            MaxCount = maxCount;
        }
        public void AddRolling(T item)
        {
            if (Count == MaxCount) RemoveAt(0);
            Add(item);
        }
        public void PrependRolling(T item)
        {
            Insert(0, item);
            if (Count > MaxCount) RemoveAt(Count - 1);
        }
    }
}