using System.Collections;

namespace RhSolutions.ExcelTable;

public class ExcelColumnsEnumerator: IEnumerator<ExcelColumn>
{
    public Range Range { get; }
    public ExcelTable ParentTable { get; }
    private int position = 0;
    object IEnumerator.Current
    {
        get
        {
            return Current;
        }
    }

    public ExcelColumn Current
    {
        get
        {
            try
            {
                return new ExcelColumn(Range.Columns[position], ParentTable);
            }
            catch (IndexOutOfRangeException)
            {
                throw new InvalidOperationException();
            }
        }
    }

    public ExcelColumnsEnumerator(Range range, ExcelTable table)
    {
        Range = range;
        ParentTable = table;
    }

    public bool MoveNext()
    {
        position++;
        return (position <= Range.Columns.Count);
    }

    public void Reset()
    {
        position = 0;
    }

    public void Dispose()
    {

    }
}