using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Diagnostics;
    using System.Drawing;
    using System.Drawing.Imaging;
    using System.IO;
    using System.Linq;
    using System.Net;
    using System.Text;
    using System.Threading;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    using unfreez_wrapper;

    namespace Extract
    {
        public partial class Form1 : Form
        {
            string[] statements;
            List<string> urls = new List<string>();
            WebClient client;

            public Form1()
            {
                InitializeComponent();

                label3.Text = "";

                ExtractLinks();
            }

            private void ExtractLinks()
            {
                using (WebClient client = new WebClient())
                {
                    client.Headers.Add("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36");
                    client.DownloadFile("https://de.sat24.com/de/eu/infraPolair/", @"D:\localfile.html");

                    var file = File.ReadAllText(@"D:\localfile.html");

                    int idx = file.IndexOf("arrayImageTimes.push");
                    int idx1 = file.IndexOf("</script>", idx);

                    string results = file.Substring(idx, idx1 - idx);
                    statements = results.Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);

                    for (int i = 0; i < statements.Length; i++)
                    {
                        if (i == 10)
                        {
                            break;
                        }

                        string number = statements[i].Split('\'')[1];

                        urls.Add("https://de.sat24.com/image?type=infraPolair&region=eu&timestamp=" + number);
                    }
                }
            }

            private async Task DownloadAsync()
            {
                using (var client = new WebClient())
                {
                    client.DownloadFileCompleted += (s, e) => label1.Text = "Download file completed.";
                    client.DownloadProgressChanged += (s, e) => progressBar1.Value = e.ProgressPercentage;
                    client.DownloadProgressChanged += (s, e) => label2.Text = FormatBytes(e.BytesReceived);
                    client.DownloadProgressChanged += (s, e) =>
                    {
                        label3.Text = "%" + e.ProgressPercentage.ToString();
                        label3.Left = Math.Min(
                            (int)(progressBar1.Left + e.ProgressPercentage / 100f * progressBar1.Width),
                            progressBar1.Width - label3.Width
                        );
                    };
                    for (int i = 0; i < urls.Count; i++)
                    {
                        await client.DownloadFileTaskAsync(new Uri(urls[i]), @"d:\satImages\img" + i + ".gif");
                    }
                }
            }

            void wc_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
            {

            }

            private void Form1_Load(object sender, EventArgs e)
            {

            }

            private async void Button1_Click(object sender, EventArgs e)
            {
                await DownloadAsync();
            }

            private void timer1_Tick(object sender, EventArgs e)
            {

            }

            private string FormatBytes(long bytes)
            {
                string[] Suffix = { "B", "KB", "MB", "GB", "TB" };
                int i;
                double dblSByte = bytes;
                for (i = 0; i < Suffix.Length && bytes >= 1024; i++, bytes /= 1024)
                {
                    dblSByte = bytes / 1024.0;
                }

                return String.Format("{0:0.00} {1}", dblSByte, Suffix[i]);
            }
        }
    }