using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Lab
{
    /// <summary>
    /// Interaction logic for FibonacciWindow.xaml
    /// </summary>

    public partial class FibonacciWindow : Window
    {
        private void ClickBack(object sender, RoutedEventArgs e) => Close();

        private void ClickCalc(object sender, RoutedEventArgs e)
        {
            OutBox.Text = "";
            InfoText.Text = "";

            if (!Parsers.TryParseInt(NBox.Text, out int n) || n <= 0) {
                InfoText.Text = "Введите целое N, N > 0.";
                return;
            }

            long a = 1;
            long b = 1;
            List<long> list = new List<long>();
            while (a < n) { list.Add(a); long next = a + b; a = b; b = next; }

            OutBox.Text = string.Join(", ", list);
            InfoText.Text = $"Найдено чисел: {list.Count}.";
        }

        public FibonacciWindow()
        {
            InitializeComponent();
        }
    }
}