using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace ln.collections
{
    public class ArrayStream<T>
    {
        public T[] Elements { get; }
        public int Position { get; set; }

        public ArrayStream(T[] elements)
        {
            Elements = elements;
            Position = 0;
        }
        public ArrayStream(IEnumerable<T> elements)
        {
            Elements = elements.ToArray();
            Position = 0;
        }

        public T Current => Elements[Position];
        public T Next() => Next(1);
        public T Next(int forward) => Elements[Position + 1 + forward];

        public bool MoveNext()
        {
            if (Position >= Elements.Length)
                throw new EndOfStreamException();

            Position++;
            return (Position < Elements.Length);
        }

        public bool EndOfStream => (Position < Elements.Length);

    }
}