using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace wcftest.sql
{
    class getToken
    {
        /// <summary>
        /// 设置头属性公有方法
        /// </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;
            }
        }
        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="timeStamp"></param>
        /// <param name="nonce"></param>
        /// <param name="paramjson"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static string GetSignature(string timeStamp, string nonce, string data)
        {

            var hash = System.Security.Cryptography.MD5.Create();
            //拼接签名数据
            string appkey = "PT20180001";
            string appscret = "EC83335F-F695-41D5-8304-B5BFC351E5C0";

            //timeStamp = "1615911903352";
            //nonce = "25883581687";
            //data="{\"createDate\":\"2021/3/16 16:32:10\"}";

            data = data.Replace(".0,", ",");
            data = data.Replace(".0}", "}");
            var signStr = timeStamp + nonce + appkey + appscret + data;
            //将字符串中字符按升序排序
            var sortStr = string.Concat(signStr.OrderBy(c => c));
            var bytes = Encoding.UTF8.GetBytes(sortStr);
            //使用MD5加密
            var md5Val = hash.ComputeHash(bytes);
            //把二进制转化为大写的十六进制
            StringBuilder result = new StringBuilder();
            foreach (var c in md5Val)
            {
                result.Append(c.ToString("X2"));
            }
            return result.ToString().ToUpper();
        }
        public string token(string url, string jsonstr,string type)
        {

            Encoding encoding = Encoding.UTF8;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);//webrequest请求api地址  
            //公有设置头文件
            SetHeaderValue(request.Headers, "Content-Type", "application/json");
            SetHeaderValue(request.Headers, "apiType", "client");
            SetHeaderValue(request.Headers, "appKey", "PT20180001");
            SetHeaderValue(request.Headers, "appSecret", "EC83335F-F695-41D5-8304-B5BFC351E5C0");
            TimeSpan ts = DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            string time = Convert.ToInt64(ts.TotalMilliseconds).ToString();
            //string time = DateTime.Now.Ticks.ToString();
            SetHeaderValue(request.Headers, "timestamp", time);
            Random rd = new Random();
            long n = (long)Math.Floor((new Random()).NextDouble() * 100000000000D);
            string num = n.ToString().PadLeft(11, '0');
            SetHeaderValue(request.Headers, "nonce", num);
            SetHeaderValue(request.Headers, "signature", GetSignature(time, num, jsonstr));

            request.Accept = "text/html,application/xhtml+xml,*/*";
            //request.Accept = "*/*";
            request.ContentType = "application/json";
            request.Method = type.ToUpper().ToString();//get或者post  
            byte[] buffer = encoding.GetBytes(jsonstr);
            request.ContentLength = buffer.Length;
            request.GetRequestStream().Write(buffer, 0, buffer.Length);
            try
            {
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    return reader.ReadToEnd();
                }
            }
            catch (WebException ex)
            {
                HttpWebResponse resp = (HttpWebResponse)ex.Response;

                Stream responseStream = resp.GetResponseStream();

                StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);

                string sReturn = sr.ReadToEnd().Trim();

                resp.Close();

                sr.Close();

                Console.WriteLine(sReturn);
            }
            return "";
        
        }
    }
}