using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Script.Serialization;

namespace ARC.GMP.Utils
{
    public class TokenManager
    {
        public async Task<string> GetToken(string baseAddress, string clientId, string userName, string Password, string userDomain, string userId)
        {
            string result = "";
            ServicePointManager.DefaultConnectionLimit = 10;
            HttpClient client = null;
            HttpResponseMessage response = null;
            try
            {
                using (client = new HttpClient())
                {
                    client.BaseAddress = new Uri(baseAddress);
                    client.DefaultRequestHeaders.Accept.Clear();
                    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                    HttpContent tokenContent = new FormUrlEncodedContent(
                       new Dictionary<string, string> {
                           { "grant_type", "password" },
                           { "client_Id", clientId },
                           { "username", userName },
                           { "password", Password },
                           { "logon_userdomain", userDomain },
                           { "logon_userid", userId } });

                    // New code:
                    using (response = await client.PostAsync("Token", tokenContent))
                    {
                        if (response.IsSuccessStatusCode)
                        {
                            var byteResponse = await response.Content.ReadAsByteArrayAsync();
                            JObject obj = JObject.Parse(Encoding.UTF8.GetString(byteResponse));
                            result = (string)obj["access_token"];
                            response.Dispose();
                        }
                        else
                        {
                            result = "";
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                result = "{\"Status\":\"Timedout\",\"StatusDescription\":" + ex.Message + "}";
            }
            finally
            {
                if (client != null) client.Dispose();
                if (response != null) response.Dispose();
            }
            return result;
        }
    }
}