using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using Bowin.Common.JSON;
using System.Web;

namespace EMISOnline.Utility.FormValidate
{
    public static class SSO
    {
        public static string SSOLogin()
        {
            string fromUrl = ""; 
            string currentUrl = HttpContext.Current.Request.Url.AbsoluteUri;
            string getTicketUrl = Const.SSO_HOST + "Account/GetTicket?url=" + currentUrl;
            string authUrl = Const.SSO_HOST + "Account/AuthTicket";
            string ticket = HttpContext.Current.Request["ticket"];

            if (HttpContext.Current.Request.UrlReferrer != null)
            {
                fromUrl = HttpContext.Current.Request.UrlReferrer.AbsolutePath;
            }

            if (ticket == null && !fromUrl.StartsWith(Const.SSO_HOST))
            {
                HttpContext.Current.Response.Redirect(getTicketUrl);
                return "";
            }
            else if (ticket == null && fromUrl.StartsWith(Const.SSO_HOST))
            {
                return "";
            }
            else
            {
                WebRequest webRequest = (HttpWebRequest)WebRequest.Create(authUrl + "?ticket=" + ticket);
                webRequest.Method = "POST";
                webRequest.ContentType = "text/json";
                webRequest.ContentLength = 0;
                StreamReader sr = new StreamReader(webRequest.GetResponse().GetResponseStream());
                string loginID = sr.ReadToEnd();
                sr.Close();

                return loginID.JsonToObject<string>();
            }
        }
    }
}