using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
 
namespace ChromiumUpdate
{
    public partial class Form1 : Form
    {
        public const string VERSION = "0.2 BETA";
        WebClient webClient = new WebClient();
        private String latestver = "";
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
            webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
            String temp = "http://commondatastorage.googleapis.com/chromium-browser-snapshots/Win/" + latestver + "/mini_installer.exe";
            webClient.DownloadFileAsync(new Uri(temp), @"./mini_installer.exe");
            button1.Text = "Download in progress...";
            button1.Enabled = false;
            button2.Enabled = false;
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            byte[] buf = new byte[8192];
            HttpWebRequest request = (HttpWebRequest)
                WebRequest.Create("http://commondatastorage.googleapis.com/chromium-browser-snapshots/Win/LAST_CHANGE");
            HttpWebResponse response = (HttpWebResponse)
                request.GetResponse();
            Stream resStream = response.GetResponseStream();
 
            string tempString = null;
            int count = 0;
 
            do
            {
                count = resStream.Read(buf, 0, buf.Length);
 
                if (count != 0)
                {
                    tempString = Encoding.ASCII.GetString(buf, 0, count);
                    sb.Append(tempString);
                }
            }
            while (count > 0);
            latestver = sb.ToString();
        }
 
        private void button2_Click(object sender, EventArgs e)
        {
            webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
            webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);
            String temp = "http://commondatastorage.googleapis.com/chromium-browser-snapshots/Win/" + textBox1.Text + "/mini_installer.exe";
            try
            {
                webClient.DownloadFileAsync(new Uri(temp), @"./mini_installer.exe");
                button1.Enabled = false;
                button2.Enabled = false;
                button2.Text = "Download in progress...";
            }
            catch (Exception Z)
            {
                MessageBox.Show(textBox1.Text+" is not a valid Chromium build number.");
            }
        }
        private void ProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;
        }
        private void Completed(object sender, AsyncCompletedEventArgs e)
        {
            MessageBox.Show("Download completed!");
            button1.Enabled = true;
            button2.Enabled = true;
            Process.Start(@"mini_installer.exe");
        }
       
    }
}