using System.Threading.Tasks;

using System.Net.Http;

using Newtonsoft.Json;

using System.Net.Http.Headers;

    /// <summary>

    /// Http Method Helper

    /// </summary>

    public static class HttpHelper

    {

        private static HttpClient instance = null;

        public static HttpClient GetClient()

        {

            if (instance == null)

                instance = new HttpClient();

            return instance;

        }

        /// <summary>

        /// Get Method

        /// </summary>

        public static async Task<T> Get<T>(string url)

        {

            try

            {

                var client = GetClient();

                var responseMsg = await client.GetAsync(url);

                if (responseMsg.IsSuccessStatusCode)

                {

                    string strJson = await responseMsg.Content.ReadAsStringAsync();

                    return JsonConvert.DeserializeObject<T>(strJson);

                }

                else

                {

                    return default(T);

                }

            }

            catch

            {

                instance = new HttpClient();

                return default(T);

            }

        }

        /// <summary>

        /// Post Method

        /// </summary>

        public static async Task<T> Post<T>(string url, dynamic para)

        {

            try

            {

                if (para != null)

                {

                    var requestJson = JsonConvert.SerializeObject(para);

                    HttpContent httpContent = new StringContent(requestJson);

                    httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

                    var client = GetClient();

                    var responseJson = await client.PostAsync(url, httpContent).Result.Content.ReadAsStringAsync();

                    return JsonConvert.DeserializeObject<T>(responseJson);

                }

                return default(T);

            }

            catch

            {

                instance = new HttpClient();

                return default(T);

            }

        }

    }