using NCC.Code;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
//using System.Net.Http.Formatting;
using System.Net.Http.Headers;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace Antis.Pay.Core
{
    public static class HTTPHelper
    {
        private static string USER_AGENT = string.Format("WXPaySDK/{3} ({0}) .net/{1} {2}", Environment.OSVersion, Environment.Version, WepayConfig.WEPAY_APP_MCH_ID, typeof(HTTPHelper).Assembly.GetName().Version);
        public static string Post(string url, string content, string contentType = "application/x-www-form-urlencoded")
        {
            string result = string.Empty;
            try
            {
                using (var client = new HttpClient())
                {
                    client.DefaultRequestHeaders.Accept.Clear();
                    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(contentType));
                    var stringContent = new StringContent(content, Encoding.UTF8);
                    var response = client.PostAsync(url, stringContent).Result;
                    result = response.Content.ReadAsStringAsync().Result;
                }
            }
            catch (Exception e)
            {
                throw new Exception("POST请求错误" + e.ToString());
            }
            return result;
        }

        public static string Post(string url, string xml, bool isUseCert, int timeout)
        {
            System.GC.Collect();//垃圾回收，回收没有正常关闭的http连接

            string result = "";//返回结果

            HttpWebRequest request = null;
            HttpWebResponse response = null;
            Stream reqStream = null;

            try
            {
                //设置最大连接数
                ServicePointManager.DefaultConnectionLimit = 200;
                Log4jHelper.LogInfo($"https验证方式之前");
                //设置https验证方式
                if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                {
                    Log4jHelper.LogInfo($"进入https验证方式");
                    ServicePointManager.ServerCertificateValidationCallback =
                            new RemoteCertificateValidationCallback(CheckValidationResult);

                    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3
                    | SecurityProtocolType.Tls
                    | (SecurityProtocolType)0x300 //Tls11
                    | (SecurityProtocolType)0xC00; //Tls12


                }

                /***************************************************************
                * 下面设置HttpWebRequest的相关属性
                * ************************************************************/
                request = (HttpWebRequest)WebRequest.Create(url);
                request.UserAgent = USER_AGENT;
                request.Method = "POST";
                request.Timeout = timeout * 1000;

                //设置代理服务器
                //WebProxy proxy = new WebProxy();                          //定义一个网关对象
                //proxy.Address = new Uri(WxPayConfig.PROXY_URL);              //网关服务器端口:端口
                //request.Proxy = proxy;

                //设置POST的数据类型和长度
                request.ContentType = "text/xml";
                byte[] data = System.Text.Encoding.UTF8.GetBytes(xml);
                request.ContentLength = data.Length;

                //是否使用证书
                if (isUseCert)
                {

                    string path = HttpContext.Current.Request.PhysicalApplicationPath;
                    X509Certificate2 cert = new X509Certificate2(path + WepayConfig.WECHAT_SSlCertPath, WepayConfig.WECHAT_SSlCertPass);
                    request.ClientCertificates.Add(cert);
                    Log4jHelper.LogInfo($"使用证书"+cert);
                }

                //往服务器写入数据
                reqStream = request.GetRequestStream();
                reqStream.Write(data, 0, data.Length);
                reqStream.Close();

                //获取服务端返回
                response = (HttpWebResponse)request.GetResponse();

                //获取服务端返回数据
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                result = sr.ReadToEnd().Trim();
                sr.Close();
            }
            catch (System.Threading.ThreadAbortException e)
            {
                Log4jHelper.LogInfo($"ThreadAbortException异常  {e.Message}");

                System.Threading.Thread.ResetAbort();
            }
            catch (WebException e)
            {
                Log4jHelper.LogInfo($"WebException异常 {e.Message}");


                if (e.Status == WebExceptionStatus.ProtocolError)
                {

                    //Log.Error("HttpService", "StatusCode : " + ((HttpWebResponse)e.Response).StatusCode);
                    //Log.Error("HttpService", "StatusDescription : " + ((HttpWebResponse)e.Response).StatusDescription);
                }
                throw;
            }
            catch (Exception e)
            {
                Log4jHelper.LogInfo($"Exception异常 {e.Message}");

                throw;
            }
            finally
            {
                //关闭连接和流
                if (response != null)
                {
                    response.Close();
                }
                if (request != null)
                {
                    request.Abort();
                }
            }
            return result;
        }

        public static string Get(string url, int timeout, string contentType = "application/x-www-form-urlencoded")
        {
            string result = string.Empty;
            try
            {
                using (var client = new HttpClient())
                {
                    client.Timeout = new TimeSpan(0, 0, 0, 0, timeout);
                    var response = client.GetAsync(url).Result;
                    result = response.Content.ReadAsStringAsync().Result;
                };
            }
            catch (Exception e)
            {
                throw new Exception("GET请求错误" + e.ToString());
            }
            return result;
        }






        public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {

            //直接确认，否则打不开    
            return true;
        }
    }
}