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using Google.Protobuf;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Tango.PMR.Synchronization;

namespace Tango.Transport.Web
{
    public class JsonWebClient : ITransportWebClient
    {
        private HttpClient _httpClient;

        public JsonWebClient()
        {
            _httpClient = new HttpClient();
        }

        public void Dispose()
        {
            throw new NotImplementedException();
        }

        public Task<Response> Post<Request, Response>(String url, Request request) where Request : class, IMessage where Response : class, IMessage
        {
            return Task.Factory.StartNew<Response>(() =>
            {
                var req = new ByteArrayContent(Encoding.UTF8.GetBytes(request.ToString()));
                req.Headers.Add("Content-Type", "application/json");

                var response = _httpClient.PostAsync(url, req).Result;

                var data = response.Content.ReadAsStringAsync().Result;

                Response dummy = Activator.CreateInstance<Response>() as Response;

                return dummy.GetParser().ParseJson(data) as Response;
            });
        }

        public Task<Response> PostJson<Request, Response>(String url, Request request) where Request : class where Response : class
        {
            return Task.Factory.StartNew<Response>(() =>
            {
                var req = new ByteArrayContent(Encoding.UTF8.GetBytes(request.ToJsonString()));
                req.Headers.Add("Content-Type", "application/json");

                var response = _httpClient.PostAsync(url, req).Result;
                var data = response.Content.ReadAsStringAsync().Result;

                try
                {
                    response.EnsureSuccessStatusCode();
                }
                catch (HttpRequestException ex)
                {
                    throw new HttpRequestException(ex.Message + " " + JObject.Parse(data).GetValue("Message"));
                }

                return JsonConvert.DeserializeObject<Response>(data);
            });
        }
    }
}