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

namespace DownloadManager
{
    public partial class Form1 : MaterialSkin.Controls.MaterialForm
    {
        List<ToDownload> listOfToDownloadItems = new List<ToDownload>();
        BindingSource source = new BindingSource();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

            source.DataSource = listOfToDownloadItems;
            ToDownloadGrid.DataSource = source;

        }

        private void pathButton_Click(object sender, EventArgs e)
        {
            var folderBrowserDialog1 = new FolderBrowserDialog();
            DialogResult result = folderBrowserDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                var fileSavePath = folderBrowserDialog1.SelectedPath;
            }
        }

        private void downloadButton_Click(object sender, EventArgs e)
        {
            string fileName = nameBox.Text;
            string urlName = urlBox.Text;
            string fileNameEnd;

            if (urlName.Length == 0)
            {
                MessageBox.Show("You haven't set the url of the object to download!");
                return;
            }
            if (fileName.Length == 0)
            {
                fileNameEnd = System.IO.Path.GetFileName(urlName);
            }
            else
            {
                fileNameEnd = fileName;
            }



            var extension = System.IO.Path.GetExtension(urlName);
            string myLocalFilePath = @"C:\Users\Tim\Documents\pics\" + fileNameEnd + extension;



            using (var client = new WebClient())
            {
                inProgress.Text = "Downloading...";

                string[] split = urlName.Split('/');
                string NameWithoutExt = System.IO.Path.GetFileNameWithoutExtension(split[split.Length - 1]);

                ToDownload item = new ToDownload();
                item.ID = listOfToDownloadItems.Count;
                item.Name = NameWithoutExt;
                item.Status = "Downloading";

                client.OpenRead(urlName);
                Int64 bytes_total = Convert.ToInt64(client.ResponseHeaders["Content-Length"]);


                item.Size = SizeSuffix(bytes_total);
                item.Added = DateTime.Now;

                listOfToDownloadItems.Add(item);

                source.ResetBindings(false);
                client.DownloadProgressChanged += (sender2, e2) => Client_DownloadProgressChanged(sender2, e2, item.ID)
                client.DownloadFileCompleted += (sender3, e3) => Client_DownloadFileCompleted(sender3, e3, item.ID);
                client.DownloadFileAsync(new Uri(urlName), myLocalFilePath);


            }

        }

        private void Client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e, int ID)
        {
            //progress bar
            listOfToDownloadItems[ID].Status = "Downloading %" + e.ProgressPercentage;
                source.ResetBindings(false);


        }

        private void Client_DownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e, int ID)
        {
            //download complete

            listOfToDownloadItems[ID].Status = "Download Finished";
                source.ResetBindings(false);

        }


        static readonly string[] SizeSuffixes =
                   { "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };

        static string SizeSuffix(Int64 value, int decimalPlaces = 1)
        {
            if (decimalPlaces < 0) { throw new ArgumentOutOfRangeException("decimalPlaces"); }
            if (value < 0) { return "-" + SizeSuffix(-value); }
            if (value == 0) { return string.Format("{0:n" + decimalPlaces + "} bytes", 0); }

            // mag is 0 for bytes, 1 for KB, 2, for MB, etc.
            int mag = (int)Math.Log(value, 1024);

            // 1L << (mag * 10) == 2 ^ (10 * mag)
            // [i.e. the number of bytes in the unit corresponding to mag]
            decimal adjustedSize = (decimal)value / (1L << (mag * 10));

            // make adjustment when the value is large enough that
            // it would round up to 1000 or more
            if (Math.Round(adjustedSize, decimalPlaces) >= 1000)
            {
                mag += 1;
                adjustedSize /= 1024;
            }

            return string.Format("{0:n" + decimalPlaces + "} {1}",
                adjustedSize,
                SizeSuffixes[mag]);
        }

        private void urlBox_TextChanged(object sender, EventArgs e)
        {

        }

    }
}