using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Net.Security;
using System.Net;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace Admin.Core.Socket.Helper
{
    public class HttpRequestUtility
    {

        /// <summary>
        /// The default user agent
        /// </summary>
        private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
        private static CookieCollection cookieCollection = new CookieCollection();

        #region Post方式请求URL，并返回T类型
        /// <summary>
        /// Post方式请求URL，并返回T类型
        /// </summary>
        /// <typeparam name="T">接收JSON的数据类型</typeparam>
        /// <param name="url">传入的url</param>
        /// <returns>传入的对象</returns>
        public static T PostJson<T>(string url, string data, string token, string flag)
        {
           // JavaScriptSerializer js = new JavaScriptSerializer();
            string returnText = Post(url, data, token, flag);//使用get获取

            //T result = js.Deserialize<T>(returnText);

            T result = JsonConvert.DeserializeObject<T>(returnText);

            return result;
        }

        #endregion

        #region Post发送请求

        /// <summary>
        ///  Post发送请求
        /// </summary>
        /// <param name="url">请求的url</param>
        /// <param name="data">请求的数据</param>
        /// <param name="token">安全token</param>
        /// <param name="flag">标识login：登陆，user，rToken:获取用户、设备数据</param>
        /// <returns>返回值</returns>
        public static string Post(string url, string data, string token, string flag)
        {
            string result = string.Empty;
            try
            {
                var response = PostHttpResponse(url, data, token, 50000, DefaultUserAgent, flag, Encoding.UTF8, cookieCollection);
                var stream = response.GetResponseStream();
                StreamReader reader = new StreamReader(stream);
                result = reader.ReadToEnd();
                stream.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }
        #endregion

        #region  创建Post方式的HTTP请求
        public static HttpWebResponse PostHttpResponse(string url, string content, string token, int? timeout, string userAgent, string flag, Encoding requestEncoding, CookieCollection cookies)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }
            if (requestEncoding == null)
            {
                throw new ArgumentNullException("requestEncoding");
            }
            HttpWebRequest request = null;
            //如果是发送HTTPS请求  
            if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.ProtocolVersion = HttpVersion.Version10;
            }
            else
            {
                request = WebRequest.Create(url) as HttpWebRequest;
            }
            request.Method = "POST";
            //获取token使用
            if (flag == "login")
            {
                SetHeaderValue(request.Headers, "X-Requested-With", "XMLHttpRequest");
                SetHeaderValue(request.Headers, "Content-type", "application/json");
            }
            if (flag == "user" || flag == "rtoken")
            {
                SetHeaderValue(request.Headers, "Authorization", "Bearer " + token);//刷新的token
            }
            if (flag == "Authorization")
            {
                SetHeaderValue(request.Headers, "Content-type", "application/json");
                SetHeaderValue(request.Headers, "Authorization", "Bearer " + token);
            }
            if (flag == "userInfo")
            {
                SetHeaderValue(request.Headers, "Content-type", "application/json");
                SetHeaderValue(request.Headers, "UserName", "admin");
                SetHeaderValue(request.Headers, "Password", "ZmVuZ3RhaXpoYW4xMjM=");
            }
            if (flag == "zhiwucloud")
            {
                SetHeaderValue(request.Headers, "Content-type", "application/x-www-form-urlencoded;charset=UTF-8");
                SetHeaderValue(request.Headers, "Authorization", "Basic MGUyZjNjN2RlMjRkNzkxYTA3MDY1NmI2NzhiMTBiMWUwYzg4NDg4MzphZGJlZmYxYjUyNjliMDE1YzBmYzZiNDJlZjhkZjQwN2ZkNjlhNmIw");
            }
            if (flag == "hnt")
            {
                SetHeaderValue(request.Headers, "Content-type", "application/json;charset=UTF-8");
            }
            if (!string.IsNullOrEmpty(userAgent))
            {
                request.UserAgent = userAgent;
            }
            else
            {
                request.UserAgent = DefaultUserAgent;
            }

            if (timeout.HasValue)
            {
                request.Timeout = timeout.Value;
            }
            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            //如果需要POST数据  
            byte[] data = requestEncoding.GetBytes(content);
            using (Stream stream = request.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }
            return request.GetResponse() as HttpWebResponse;
        }
        #endregion

        #region 往head头部加信息
        // <summary>
        /// 往head头部加信息
        /// </summary>
        /// <param name="header"></param>
        /// <param name="name"></param>
        /// <param name="value"></param>
        public static void SetHeaderValue(WebHeaderCollection header, string name, string value)
        {
            var property = typeof(WebHeaderCollection).GetProperty("InnerCollection", BindingFlags.Instance | BindingFlags.NonPublic);
            if (property != null)
            {
                var collection = property.GetValue(header, null) as NameValueCollection;
                collection[name] = value;
            }

        }

        #endregion

        #region Checks the validation result.
        /// <summary>
        /// Checks the validation result.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="certificate">The certificate.</param>
        /// <param name="chain">The chain.</param>
        /// <param name="errors">The errors.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true; //总是接受  
        }
        #endregion

        #region Get方式请求URL，并返回T类型
        /// <summary>
        /// GET方式请求URL，并返回T类型
        /// </summary>
        /// <typeparam name="T">接收JSON的数据类型</typeparam>
        /// <param name="url">传入的url</param>
        /// <param name="encoding"></param>
        /// <param name="maxJsonLength">允许最大JSON长度</param>
        /// <returns>传入的对象</returns>
        public static T GetJson<T>(string url, string token, string flag)
        {
           // JavaScriptSerializer js = new JavaScriptSerializer();
            string returnText = Get(url, token, flag);//使用get获取
                                                      // T result = js.Deserialize<T>(returnText);
            string rt = returnText.Replace("params", "param");

            T result = JsonConvert.DeserializeObject<T>(rt);
            return result;
        }

        #endregion

        #region Get发送请求

        /// <summary>
        ///  Post发送请求
        /// </summary>
        /// <param name="url">请求的url</param>
        /// <param name="data">请求的数据</param>
        /// <param name="token">安全token</param>
        /// <param name="flag">标识login：登陆，user，rToken:获取用户、设备数据</param>
        /// <returns>返回值</returns>
        public static string Get(string url, string token, string flag)
        {
            string result = string.Empty;
            try
            {
                var response = GetHttpResponse(url, token, 50000, DefaultUserAgent, flag, Encoding.UTF8, cookieCollection);
                using (var stream = response.GetResponseStream())
                {
                    StreamReader reader = new StreamReader(stream);
                    result = reader.ReadToEnd();
                    stream.Close();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }
        #endregion

        #region  创建Get方式的HTTP请求
        public static HttpWebResponse GetHttpResponse(string url, string token, int? timeout, string userAgent, string flag, Encoding requestEncoding, CookieCollection cookies)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }
            if (requestEncoding == null)
            {
                throw new ArgumentNullException("requestEncoding");
            }
            HttpWebRequest request = null;
            //如果是发送HTTPS请求  
            if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.ProtocolVersion = HttpVersion.Version10;
            }
            else
            {
                request = WebRequest.Create(url) as HttpWebRequest;
            }
            request.Method = "GET";
            //获取token使用

            if (flag == "user" || flag == "rtoken")
            {
                SetHeaderValue(request.Headers, "Authorization", "Bearer " + token);//刷新的token
            }
            if (flag == "zhiwucloud")
            {
                SetHeaderValue(request.Headers, "Content-type", "application/json");
                //SetHeaderValue(request.Headers, "Authorization", "Basic MGUyZjNjN2RlMjRkNzkxYTA3MDY1NmI2NzhiMTBiMWUwYzg4NDg4MzphZGJlZmYxYjUyNjliMDE1YzBmYzZiNDJlZjhkZjQwN2ZkNjlhNmIw");
            }

            if (!string.IsNullOrEmpty(userAgent))
            {
                request.UserAgent = userAgent;
            }
            else
            {
                request.UserAgent = DefaultUserAgent;
            }

            if (timeout.HasValue)
            {
                request.Timeout = timeout.Value;
            }
            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            return request.GetResponse() as HttpWebResponse;
        }
        #endregion

    }
}