using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading;
using System.Web;

namespace POSV.OtherMember.Utils
{
    public class MemberHttpUtils
    {
        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        private static int TIMEOUT = 30 * 1000;
        

        private static HttpClient GetHttpClient()
        {
            HttpClient httpClient = null;


            var handler = new HttpClientHandler();
            if (handler.SupportsAutomaticDecompression)
            {
                handler.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
            }

            handler.Proxy = null;
            handler.UseDefaultCredentials = false;
            
            Interlocked.CompareExchange(ref httpClient, new HttpClient(handler) { BaseAddress = new Uri(MemberApiUtils.URL) }, null);

            httpClient.DefaultRequestHeaders.Connection.Add("Keep-Alive");
            httpClient.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36");
            //_httpClient.DefaultRequestHeaders.Add("Content-Type" , "application/x-www-form-urlencoded; charset=UTF-8");
            httpClient.DefaultRequestHeaders.Add("Accept", "*/*");
            httpClient.DefaultRequestHeaders.Add("Accept-Encoding", "gzip, deflate"); //声明给服务器，客户端支持gzip解压
            httpClient.DefaultRequestHeaders.Add("Accept-Language", "zh-cn,en-us;q=0.7,en;q=0.3");
            httpClient.DefaultRequestHeaders.Add("Pragma", "no-cache");
            httpClient.DefaultRequestHeaders.Add("Cache-Control", "no-cache");

            httpClient.DefaultRequestHeaders.Add("JW-API-VERSION", "1.0.0");

            //zhangy 2019-11-24 10:13
            httpClient.MaxResponseContentBufferSize = int.MaxValue;
            httpClient.DefaultRequestHeaders.ExpectContinue = false;
            httpClient.Timeout = TimeSpan.FromMilliseconds(TIMEOUT);

            return httpClient;
        }


        public static string PostAsync(SortedList<string, string> parameters)
        {
            Stopwatch watch = Stopwatch.StartNew();

            ServicePointManager.Expect100Continue = false;
            //提升系统外联的最大并发web访问数
            ServicePointManager.DefaultConnectionLimit = 512;
            ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;

            try
            {

                var stringParams = MemberJsonUtils.Serialize(parameters);

                logger.Info("请求参数:{0}", stringParams);


                Console.WriteLine("请求参数:" + stringParams);


                var httpClient = GetHttpClient();

                var content = new StringContent(stringParams, Encoding.UTF8, "application/json");

                var task = httpClient.PostAsync(MemberApiUtils.URL, content);

                task.Result.EnsureSuccessStatusCode();

                HttpResponseMessage response = task.Result;

                var result = response.Content.ReadAsStringAsync();

                var responseDetails = result.Result;


                Console.WriteLine("应答信息:" + responseDetails);


                //logger.Info("Sucessfully sent HTTP request to api Invoices with repsonse" + responseDetails);

                return responseDetails;
            }
            catch (Exception ex)
            {
                string message = "调用PostAsync方法发生错误";
                if (parameters != null && parameters.ContainsKey("method"))
                {
                    message = "调用<" + parameters["method"] + ">发生错误";
                }
                logger.Error(ex, message);

                throw new Exception(message);
            }
            finally
            {
                string methodName = "NoDefined";
                if (parameters != null && parameters.ContainsKey("method"))
                {
                    methodName = parameters["method"];
                }
                logger.Info("调用<{0}>方法,耗时<{1}>毫秒", methodName, watch.ElapsedMilliseconds);
            }
        }


    }
}