using System.Collections;

namespace Numbers.NumberString;

/// <summary>
///     Represents a string consisting of digits and letters intermixed
/// </summary>
/// <inheritdoc cref="IEnumerable{T}" />
/// <inheritdoc cref="IComparable{T}" />
public sealed class NumberString : IEnumerable<int>, IComparable<NumberString>
{
    // TODO
    // private readonly string _text;
    // private int? _numericValue;

    /// <summary>
    ///     Creates a new instance of <see cref="NumberString" /> based on the given text.
    ///     As a simplification, the text is assumed to be a valid number string.
    /// </summary>
    /// <param name="text">A string containing digits and letters</param>
    public NumberString(string text)
    {
        // TODO
    }

    /// <summary>
    ///     Gets the numeric value contained in the number string
    /// </summary>
    public int NumericValue => -1; // TODO

    /// <summary>
    ///     Gets the digit at the given index.
    ///     If the index is out of range, -1 is returned.
    /// </summary>
    /// <param name="index">Digit index</param>
    public int this[int index]
    {
        get
        {
            // TODO
            return -1;
        }
    }

    public int CompareTo(NumberString? other) => -1; // TODO

    public IEnumerator<int> GetEnumerator() => null!; // TODO

    IEnumerator IEnumerable.GetEnumerator() => null!; // TODO

    public override bool Equals(object? obj)
    {
        // TODO
        return false;
    }

    public override int GetHashCode() => -1; // TODO

    public static bool operator >(NumberString a, NumberString b) => false; // TODO

    public static bool operator <(NumberString a, NumberString b) => false; // TODO

    public static bool operator ==(NumberString a, NumberString b) => false; // TODO

    public static bool operator !=(NumberString a, NumberString b) => false; // TODO
}