using System;
using System.IO;
using System.Net;
using System.Text;
using System.Windows.Forms;

namespace Login
{
    public partial class LoginForm : Form
    {
        public LoginForm()
        {
            InitializeComponent();
        }

        private void loginButton_Click(object sender, EventArgs e)
        {
            string username = usernameTextBox.Text;
            string password = passwordTextBox.Text;

            string postData = "scope=openid&client_id=36926892495301a63b2e9350a38d3d6dbf72ad81e571a3ebba4687250ec8f352c70b3e91229602f73e1335528f3caa00a5cf513f484d7003784e722f2ce7a216&redirect_uri=http%3A%2F%2Fwww.twitch.tv%2F&response_type=code&state=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJyZWRpcmVjdF9wYXRoIjoiaHR0cDovL3d3dy50d2l0Y2gudHYvIn0.bvJnmxyvmepBV4cxdGbNevMJj_ki4cTn0OxmJBy8Lkc&nonce=8f24aa00cd07af0f4ea4cac613566629aab5e1d1&from_embed=false&username=" + username + "&password=" + password;
            UTF8Encoding encoding = new UTF8Encoding();
            byte[] postValue = encoding.GetBytes(postData);
            HttpWebRequest postRequest = (HttpWebRequest)WebRequest.Create("https://passport.twitch.tv/authentications/new");
            postRequest.Method = WebRequestMethods.Http.Post;
            postRequest.ContentType = "application/x-www-form-urlencoded";
            postRequest.Referer = "https://passport.twitch.tv/authentications/new?client_id=36926892495301a63b2e9350a38d3d6dbf72ad81e571a3ebba4687250ec8f352c70b3e91229602f73e1335528f3caa00a5cf513f484d7003784e722f2ce7a216&embed=0&error_code=&nonce=8f24aa00cd07af0f4ea4cac613566629aab5e1d1&redirect_uri=http%3A%2F%2Fwww.twitch.tv%2F&response_type=code&scope=openid&state=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJyZWRpcmVjdF9wYXRoIjoiaHR0cDovL3d3dy50d2l0Y2gudHYvIn0.bvJnmxyvmepBV4cxdGbNevMJj_ki4cTn0OxmJBy8Lkc&stay_embedded=0&sudo_reason=&username=";
            postRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36";
            postRequest.ContentLength = postValue.Length;

            using (Stream postRequestStream = postRequest.GetRequestStream())
            {
                postRequestStream.Write(postValue, 0, postValue.Length);

                HttpWebResponse postResponse = (HttpWebResponse)postRequest.GetResponse();
                StreamReader postRequestReader = new StreamReader(postResponse.GetResponseStream());
                string document = postRequestReader.ReadToEnd();

                twitchWebBrowser.DocumentText = document;
            }
        }
    }
}