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.Navigation;
using System.Windows.Shapes;

namespace WpfApp3
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void oblicz_Click(object sender, RoutedEventArgs e)
        {
            double a = Convert.ToDouble(paramter_a.Text);
            double b = Convert.ToDouble(paramter_b.Text);
            double c = Convert.ToDouble(paramter_c.Text);

            if (a != 0) funkcjaKwadratowa(a, b, c);
            else if (b != 0) fukncjaLiniowa(b, c);
            else rownanie(c);

        }

        private void rownanie(double a)
        {
            komentarz.Content = String.Format("Rozwiazywanie rownania f(x) = {0}", a);


            if (a == 0)
            {
                out_x1.Content = "inf.";
                out_x2.Content = "inf.";
            }

            else
            {
                out_x1.Content = "brak";
                out_x2.Content = "brak";
            }
        }

        private void fukncjaLiniowa(double a, double b)
        {
            komentarz.Content = String.Format("Rozwiazywanie rownania f(x) = {0}x + {1}", a, b);

            out_x1.Content = (-b) / a;
            out_x2.Content = "brak";
        }

        private void funkcjaKwadratowa(double a, double b, double c)
        {
            komentarz.Content = String.Format("Rozwiazywanie rownania f(x) = {0}x^2 + {1}x + {2}", a, b, c);

            double delta = (b * b) - (4 * a * c);
            if (delta > 0)
            {
                double x1 = (-b - Math.Sqrt(delta) / (2 * a));
                double x2 = (-b + Math.Sqrt(delta) / (2 * a));

                out_x1.Content = x1;
                out_x2.Content = x2;
            }

            else if (delta == 0)
            {
                out_x1.Content = (-b) / (2 * a);
                out_x2.Content = "brak";
            }

            else
            {
                out_x1.Content = "brak";
                out_x2.Content = "brak";
            }
        }
    }
}