using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Net;
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 Lab5_siszarp
{
    /// <summary>
    /// Logika interakcji dla klasy MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        public static uint Mianownik_Del(uint k)
        {
            uint result = 1;
            for (uint i = 1; i <=k; i++)
            {
                result *= i;
            }

            return result;
        }

        public static uint Licznik_Del(uint n, uint k)
        {
            uint result = 1;
            for (uint i = 1; i <= k; i++)
            {
                result *= (n - i + 1);
            }

            return result;
        }

        private void Click_Taski(object sender, RoutedEventArgs e)
        {
            if ((!int.TryParse(K_val.Text, out int k) || !int.TryParse(N_val.Text, out int n)))
                return;

            var tpl = Tuple.Create<int, int>(n, k);

            Task<int> task_l = Task.Factory.StartNew<int>(
                (tuple) =>
                {
                    var temp = (Tuple<int, int>)tuple;
                    int result = 1;
                    for (int i = 1; i <= temp.Item2; i++)
                    {
                        result *= (temp.Item1 - i + 1);
                    }

                    return result;
                }, tpl
                );

            Task<int> task_m = Task.Factory.StartNew<int>(
                (K) =>
                {
                    int result = 1;
                    for (int i = 1; i <= (int)K; i++)
                    {
                        result *= i;
                    }
                    return result;
                }, k
                );

            Task_val.Text = (task_l.Result / task_m.Result).ToString();
        }

        private void Click_Delegaty(object sender, RoutedEventArgs e)
        {
            if ((!uint.TryParse(K_val.Text, out uint k) || !uint.TryParse(N_val.Text, out uint n)))
                return;

            Func<uint, uint, uint> l_d= Licznik_Del;
            Func<uint, uint> m_d = Mianownik_Del;
            IAsyncResult result_l = l_d.BeginInvoke(n, k, null, null);
            IAsyncResult result_m = m_d.BeginInvoke(k, null, null);

            while (!result_l.IsCompleted || !result_m.IsCompleted) ;
            Del_val.Text = (l_d.EndInvoke(result_l) / m_d.EndInvoke(result_m)).ToString();
        }

        private async void Click_Async(object sender, RoutedEventArgs e)
        {
            if ((!int.TryParse(K_val.Text, out int k) || !int.TryParse(N_val.Text, out int n)))
                return;

            var tpl = Tuple.Create<int, int>(n, k);

            int res_l = await Task.Factory.StartNew<int>(
                (tuple) =>
                {
                    var temp = (Tuple<int, int>)tuple;
                    int result = 1;
                    for (int i = 1; i <= temp.Item2; i++)
                    {
                        result *= (temp.Item1 - i + 1);
                    }

                    return result;
                }, tpl
                );

            int res_m = await Task.Factory.StartNew<int>(
                (K) =>
                {
                    int result = 1;
                    for (int i = 1; i <= (int)K; i++)
                    {
                        result *= i;
                    }
                    return result;
                }, k
                );
            Async_val.Text = (res_l / res_m).ToString();
        }

        private void Click_Fib(object sender, RoutedEventArgs e)
        {
            if ((!int.TryParse(i_val.Text, out int fibo)))
                return;

            BackgroundWorker bw = new BackgroundWorker();
            bw.DoWork += ((object sndr, DoWorkEventArgs args) => {
                BackgroundWorker worker = sndr as BackgroundWorker;
                int fib = (int)args.Argument;
                long t1 = 0, t2 = 1, i = 0;
                for (int n = 1; n <= fib; ++n)
                {
                    System.Threading.Thread.Sleep(20);
                    worker.ReportProgress(n * 100 / fib);
                    if (n == 1) continue;

                    i = t1 + t2;
                    t1 = t2;
                    t2 = i;
                }

                args.Result = i;
            });
            bw.ProgressChanged += ((object sndr, ProgressChangedEventArgs args) => {
                progress_bar.Value = args.ProgressPercentage;
            });
            bw.RunWorkerCompleted += ((object sndr, RunWorkerCompletedEventArgs args) => {
                progress_bar.Value = 100.0;
                Fib_res.Text = args.Result.ToString();
            });
            bw.WorkerReportsProgress = true;
            bw.RunWorkerAsync(fibo);
        }

        private void Click_IP(object sender, RoutedEventArgs e)
        {
            string[] hostNames = { "www.microsoft.com", "www.apple.com",
            "www.google.com", "www.ibm.com", "cisco.netacad.net",
            "www.oracle.com", "www.nokia.com", "www.hp.com", "www.dell.com",
            "www.samsung.com", "www.toshiba.com", "www.siemens.com",
            "www.amazon.com", "www.sony.com", "www.canon.com", "www.alcatellucent.com",
            "www.acer.com", "www.motorola.com" };

            var IPs = hostNames.AsParallel().Select(str => {
                string res = str + " => ";
                try
                {
                    res += Dns.GetHostAddresses(str).Last().ToString();
                }
                catch (System.Net.Sockets.SocketException)
                {
                    res += "No connection :(";
                }
                return res;
            }).ToList();

            foreach(string ip in IPs)
            {
                Adr_box.AppendText(ip + '\n');
            }
        }
    }
}


<Window x:Class="Lab5_siszarp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Lab5_siszarp"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <TextBox Name="K_val" HorizontalAlignment="Left" Height="32" Margin="30,49,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="152"/>
        <Label Content="K" HorizontalAlignment="Left" Height="34" Margin="30,21,0,0" VerticalAlignment="Top" Width="152" RenderTransformOrigin="0.493,1.407"/>
        <Label Content="N" HorizontalAlignment="Left" Height="31" Margin="30,104,0,0" VerticalAlignment="Top" Width="152"/>
        <TextBox Name="N_val" HorizontalAlignment="Left" Height="30" Margin="30,135,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="152"/>
        <Button Content="Taski" HorizontalAlignment="Left" Height="21" Margin="275,23,0,0" VerticalAlignment="Top" Width="99" Click="Click_Taski"/>
        <Button Content="Delegaty" HorizontalAlignment="Left" Height="23" Margin="275,81,0,0" VerticalAlignment="Top" Width="99" Click="Click_Delegaty"/>
        <Button Content="Async await" HorizontalAlignment="Left" Height="30" Margin="275,135,0,0" VerticalAlignment="Top" Width="99" Click="Click_Async"/>
        <TextBox Name="Task_val" IsReadOnly="True" HorizontalAlignment="Left" Height="21" Margin="394,23,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="114"/>
        <TextBox Name="Del_val" IsReadOnly="True" HorizontalAlignment="Left" Height="23" Margin="394,81,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="114"/>
        <TextBox Name="Async_val" IsReadOnly="True" HorizontalAlignment="Left" Height="30" Margin="394,135,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="114"/>
        <Label Content="Fibonacci" HorizontalAlignment="Left" Height="31" Margin="30,207,0,0" VerticalAlignment="Top" Width="112"/>
        <Label Content="i:" HorizontalAlignment="Left" Height="27" Margin="30,243,0,0" VerticalAlignment="Top" Width="18"/>
        <TextBox Name="i_val" HorizontalAlignment="Left" Height="27" Margin="53,243,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="129"/>
        <Button Content="Licz" HorizontalAlignment="Left" Height="27" Margin="202,243,0,0" VerticalAlignment="Top" Width="59" Click="Click_Fib"/>
        <ProgressBar Name="progress_bar" HorizontalAlignment="Left" Height="11" Margin="30,290,0,0" VerticalAlignment="Top" Width="231"/>
        <TextBox Name="Fib_res" IsReadOnly="True" HorizontalAlignment="Left" Height="26" Margin="30,306,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="231"/>
        <Label Content="DNS" HorizontalAlignment="Left" Height="31" Margin="275,207,0,0" VerticalAlignment="Top" Width="52"/>
        <Button Content="Zbierz IP" HorizontalAlignment="Left" Height="31" Margin="327,207,0,0" VerticalAlignment="Top" Width="81" Click="Click_IP"/>
        <TextBox Name="Adr_box" IsReadOnly="True" HorizontalAlignment="Left" Height="89" Margin="275,243,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="233"/>

    </Grid>
</Window>