using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace WX.CRM.Common.Employee
{
    public class ApiDock
    {
        public ApiDock(string _AppId, string _Secret)
        {
            this.AppId = _AppId;
            this.Secret = _Secret;
        }
        private string AppId { get; set; }
        private string Secret { get; set; }

        public void GetApidResult(string url, Dictionary<string, object> param)
        {

            //AppId = "crm_tg_dng8";
            //Secret = "d7AQhPg9PX+K80n2rDZthkzB9HFf4rwwE7fEQCmByFo=";
            //默认参数 

            //拼接验证头
            Dictionary<string, string> header = new Dictionary<string, string>();
            var timestamps = "2022-06-22T18:50:51+08";// DateTime.Now.ToString("yyyy-MM-ddTHH:mm:sszz");


            string ContentMd5 = GetContentMd5(param);//获取md5加密值
            var sign = GetSign(timestamps, ContentMd5, "get");
            var authorization = $"acs {AppId}:{sign}";

            header.Add("Authorization", authorization);
            //header.Add("Date", timestamps);
            header.Add("Content-MD5", ContentMd5);

            //请求
            var req = Get(url, param, header, timestamps);
            LogHelper.Info("wechat:" + req);

            //返回 

        }
        /// <summary>
        /// 内置请求
        /// </summary>
        /// <param name=""></param>
        /// <returns></returns>
        private string Get(string url, Dictionary<string, object> param, Dictionary<string, string> header, string timestamps)
        {
            //HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            ////请求设置
            //request.Method = "GET";
            //request.ContentType = "application/json;charset=UTF-8";
            //request.Timeout = 3000;//设置超时时间
            ////拼接请求头
            //foreach (var item in header)
            //{
            //    request.Headers.Add(item.Key, item.Value);
            //}
            //MethodInfo priMethod = request.Headers.GetType().GetMethod("AddWithoutValidate", BindingFlags.Instance | BindingFlags.NonPublic);
            //priMethod.Invoke(request.Headers, new[] { "Date", timestamps });

            ////拼接参数   
            //if (param.Any())
            //{
            //    var pStr = JsonConvert.SerializeObject(param);
            //    byte[] data = Encoding.UTF8.GetBytes(pStr);
            //    using (Stream stream = request.GetRequestStream())
            //    {
            //        stream.Write(data, 0, data.Length);
            //    }
            //}
            ////提交请求
            //HttpWebResponse response;
            //try
            //{
            //    response = (HttpWebResponse)request.GetResponse();

            //}
            //catch (WebException ex)
            //{
            //    response = (HttpWebResponse)ex.Response;
            //}
            ////解析请求结果
            //using (Stream myResponseStream = response.GetResponseStream())
            //{
            //    StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            //    string retString = myStreamReader.ReadToEnd();
            //    myStreamReader.Close();
            //    //记录请求情况
            //    LogHelper.Info($"url:{url},param:{JsonConvert.SerializeObject(param)},header:{JsonConvert.SerializeObject(header)},req:{retString}");
            //    return retString;
            //}
            var urlParam = string.Join("&", param.Select(m => m.Key + "=" + m.Value));
            if (url.IndexOf('?') > -1)
            {
                url = url + urlParam;
            }
            else
            {
                url = (url + "?" + urlParam);
            }

            HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(new Uri(url));
            MethodInfo priMethod = webReq.Headers.GetType().GetMethod("AddWithoutValidate", BindingFlags.Instance | BindingFlags.NonPublic);
            priMethod.Invoke(webReq.Headers, new[] { "Date", timestamps });

            foreach (var item in header)
            {
                webReq.Headers.Add(item.Key, item.Value);
            }

            webReq.Method = "get";
            //webReq.ContentType = "application/x-www-form-urlencoded";
            webReq.ContentType = "application/json;charset=UTF-8";
            //webReq.Timeout = 3000;//设置超时时间

            HttpWebResponse response = (HttpWebResponse)webReq.GetResponse();
            StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            var _Result = sr.ReadToEnd();
            sr.Close();
            response.Close();
            return _Result;

        }
        /// <summary>
        /// 获取时间戳
        /// </summary>
        /// <returns></returns>
        private string GetTimeStamp()
        {
            TimeSpan ts = DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0, 0);
            return Convert.ToInt64(ts.TotalSeconds).ToString();
        }
        /// <summary>
        /// 计算签名
        /// </summary>
        /// <param name="param"></param>
        /// <param name="timestamps"></param>
        /// <returns></returns>
        private string GetSign(string timestamps, string ContentMd5, string method)
        {
            var json = "{\"Method\":\"" + method + "\",\"Date\":\"" + timestamps + "\",\"Content-MD5\":\"" + ContentMd5 + "\"}";
            var bx = JsonConvert.DeserializeObject(json);
            //md5 加密
            return _md5(JsonConvert.SerializeObject(bx));
        }
        public string GetContentMd5(Dictionary<string, object> param)
        {

            //一次排序
            var newP = param.OrderBy(m => m.Key).ToDictionary(m => m.Key, n => n.Value);
            var pJosn = JsonConvert.SerializeObject(newP);
            //md5 加密
            return _md5(pJosn);
        }
        /// <summary>
        ///  计算 md5
        /// </summary>
        /// <param name="enCode"></param>
        /// <returns></returns>
        private string _md5(string enCode)
        {
            string md5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(enCode, "MD5");
            //string res = "";
            //byte[] data = Encoding.GetEncoding("utf-8").GetBytes(enCode);
            //MD5 md5 = new MD5CryptoServiceProvider();
            //byte[] bytes = md5.ComputeHash(data);
            //for (int i = 0; i < bytes.Length; i++)
            //{
            //    res += bytes[i].ToString("x2");
            //}
            return Utility.StrToBase64(md5);

        }

    }
}