using System;

namespace EinmaleinsTrainer.Models;

public class Question : IEquatable<Question>
{
    public int A { get; set; }
    public int B { get; set; }

    public int CorrectAnswer => A * B;

    public bool Equals(Question? other)
    {
        if (other is null) return false;

        return A == other.A &&
               B == other.B;
    }

    public override bool Equals(object? obj)
    {
        return Equals(obj as Question);
    }

    public override int GetHashCode()
    {
        return HashCode.Combine(A, B);
    }

    public override string ToString()
    {
        return $"{A} x {B}";
    }
}