namespace Numbers.NumberFactory;

/// <summary>
///     Defines the ability to pick numbers which fulfill a certain condition from within a specified range
/// </summary>
/// <inheritdoc cref="IEnumerable{T}" />
public interface INumbers : IEnumerable<long>
{
    /// <summary>
    ///     Gets the n-th matching number in the range
    /// </summary>
    /// <param name="index">Index of the n-th number</param>
    public long this[int index] { get; }

    /// <summary>
    ///     Gets the lower bound of the number range
    /// </summary>
    public long LowerBound { get; }

    /// <summary>
    ///     Gets the upper bound of the number range
    /// </summary>
    public long UpperBound { get; }

    /// <summary>
    ///     Gets the amount of (filtered) numbers in the range
    /// </summary>
    public int Length { get; }
}