Lottery/Lottery/Lottery.cs

namespace Lottery
{
    internal record Sample(int Lower, int Upper, int Count);

    /// <summary>
    /// Abstract base class for lotteries.
    /// Sample property must be overridden.
    /// </summary>
    internal abstract class Lottery
    {
        protected virtual Sample Sample => throw new NotImplementedException();
        public virtual string Play() => $"Numbers: {string.Join(", ", Generator.Generate(Sample))}";
    }

    /// <summary>
    /// Concrete Lotto Lottery class.
    /// Generates six balls from 1 to 59.
    /// </summary>
    internal class LottoLottery : Lottery
    {
        protected override Sample Sample { get; } = new(Lower: 1, Upper: 59, Count: 6);
    }

    /// <summary>
    /// Abstract base class for Lotteries with Special values.
    /// It subclasses Lottery.
    /// SpecialSample and SpecialIdentifier properties must be overridden.
    /// </summary>
    internal abstract class LotteryWithSpecial : Lottery
    {
        protected virtual Sample SpecialSample => throw new NotImplementedException();
        protected virtual string SpecialIdentifier => throw new NotImplementedException();

        public override string Play()
        {
            return string.Join("\n", [
                $"Numbers: {string.Join(", ", Generator.Generate(Sample))}",
                $"{SpecialIdentifier}: {string.Join(", ", Generator.Generate(SpecialSample))}",
            ]);
        }
    }

    /// <summary>
    /// Concrete class for EuroMillions lottery.
    /// Generates five balls from 1 to 50 and two lucky stars from 1 to 12.
    /// </summary>
    internal class EuroMillionsLottery : LotteryWithSpecial
    {
        protected override Sample Sample { get; } = new(Lower: 1, Upper: 50, Count: 5);
        protected override Sample SpecialSample { get; } = new(Lower: 1, Upper: 12, Count: 2);
        protected override string SpecialIdentifier => "Lucky Stars";
    }

    /// <summary>
    /// Concrete class for SetForLifeLottery lottery.
    /// Generates five balls from 1 to 47 and one life ball from 1 to 10.
    /// </summary>
    internal class SetForLifeLottery : LotteryWithSpecial
    {
        protected override Sample Sample { get; } = new(Lower: 1, Upper: 47, Count: 5);
        protected override Sample SpecialSample { get; } = new(Lower: 1, Upper: 10, Count: 1);
        protected override string SpecialIdentifier => "Life Ball";
    }

    /// <summary>
    /// Concrete class for ThunderballLottery lottery.
    /// Generates fives balls from 1 to 39 and one thunderball from 1 to 14.
    /// </summary>
    internal class ThunderballLottery : LotteryWithSpecial
    {
        protected override Sample Sample { get; } = new(Lower: 1, Upper: 39, Count: 5);
        protected override Sample SpecialSample { get; } = new(Lower: 1, Upper: 14, Count: 1);
        protected override string SpecialIdentifier => "Thunderball";
    }

    /// <summary>
    /// Concrete class for PowerballLottery lottery.
    /// Generates five balls from 1 to 69 and one powerball from 1 to 26.
    /// </summary>
    internal class PowerballLottery : LotteryWithSpecial
    {
        protected override Sample Sample { get; } = new(Lower: 1, Upper: 69, Count: 5);
        protected override Sample SpecialSample { get; } = new(Lower: 1, Upper: 26, Count: 1);
        protected override string SpecialIdentifier => "Powerball";
    }
}