using EinmaleinsTrainer.Models;
using System;
using System.Linq;
using System.Collections.Generic;

namespace EinmaleinsTrainer.Services;

public class QuestionGenerator
{
    private readonly Random _random = new();

    public List<Question> Generate(List<int> rows, bool includeSquares)
    {
        var pool = new List<Question>();

        foreach (var r in rows)
        {
            for (int i = 1; i <= 10; i++)
                pool.Add(new Question { A = r, B = i });
        }

        if (includeSquares)
        {
            for (int i = 1; i <= 10; i++)
                pool.Add(new Question { A = i, B = i });
        }

        return pool.OrderBy(_ => _random.Next())
                   .Take(10)
                   .ToList();
    }
}