using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using Project1.interfaces.observer;
using Project1.utilities;
using Project1.globals;

namespace Project1.GUI
{
    public partial class DownloadForm : Form,IObserver
    {
        private string strUri;
        private string strfileName;
        private string strDownloadPath;
        Int64 kbFileSize;
        FileGrabber fg;

        public DownloadForm(Uri uri, String downloadPath)
        {
            InitializeComponent();
            this.Show();
            
            lblKBDownloaded.Text = "0KB";
            lblPercentComplete.Text = "0% complete";
            strUri = uri.ToString();
            this.strDownloadPath = downloadPath;
            strfileName = uri.Segments[uri.Segments.Length - 1];
            lblFileName.Text = strfileName;
            this.Show();
            initialiseDownload(uri);
        }

        private void initialiseDownload(Uri uri){
            try
            {
                fg = new FileGrabber(uri);
                fg.RegisterObserver(this);
                kbFileSize = fg.FileSize / 1024;
                lblSize.Text = kbFileSize.ToString() + "KB";


                if (fg.downloadFile(strDownloadPath))
                {
                    MessageBox.Show("Download Complete");
                }
                this.Close();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
                this.Close();
            }

            
        }

        public void update()
        {
            Int64 kbRead = fg.BytesRead / 1024;
            lblPercentComplete.Text = fg.PercentComplete.ToString() + "% Complete";
            lblKBDownloaded.Text = kbRead.ToString() + " / " + kbFileSize;
            
        }
    }
}