using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace Ant.Common
{
    public class WebApiHelper
    {


        /// <summary>
        /// 用户需要登录才能Post请求接口
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="url"></param>
        /// <param name="data"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static T PostAuthorized<T>(string url, string data, string token)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(data);
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);


            //写数据
            request.Method = "POST";
            request.ContentLength = bytes.Length;
            request.ContentType = "application/json";
            Stream reqstream = request.GetRequestStream();
            reqstream.Write(bytes, 0, bytes.Length);

            //读数据
            request.Timeout = 300000;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            string strResult = streamReader.ReadToEnd();

            //关闭流
            reqstream.Close();
            streamReader.Close();
            streamReceive.Close();
            request.Abort();
            response.Close();

            return JsonConvert.DeserializeObject<T>(strResult);
        }


        /// <summary>
        /// 不需要授权的接口
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="url"></param>
        /// <param name="data"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static T Post<T>(string url, string data)
        {
            byte[] bytes = Encoding.UTF8.GetBytes(data);
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            //写数据
            request.Method = "POST";
            request.ContentLength = bytes.Length;
            request.ContentType = "application/json";
            Stream reqstream = request.GetRequestStream();
            reqstream.Write(bytes, 0, bytes.Length);

            //读数据
            request.Timeout = 300000;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            string strResult = streamReader.ReadToEnd();

            //关闭流
            reqstream.Close();
            streamReader.Close();
            streamReceive.Close();
            request.Abort();
            response.Close();

            return JsonConvert.DeserializeObject<T>(strResult);
        }



        /// <summary>
        /// 用户需要登录Get请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="webApi"></param>
        /// <param name="queryStr"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static T GetMap<T>(string webApi)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webApi);
                request.Method = "GET";
                //request.ContentType = "application/json";
                request.Timeout = 90000;
                request.Headers.Set("Pragma", "no-cache");
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream streamReceive = response.GetResponseStream();
                StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
                string strResult = streamReader.ReadToEnd();

                streamReader.Close();
                streamReceive.Close();
                request.Abort();
                response.Close();

                return JsonConvert.DeserializeObject<T>(strResult);
            }
            catch (Exception ex)
            {
            }
            return default(T);

        }

        /// <summary>
        /// 用户需要登录Get请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="webApi"></param>
        /// <param name="queryStr"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static T Get<T>(string webApi, string query, string queryStr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webApi + "?" + queryStr);
            request.Method = "GET";
            request.ContentType = "application/json";
            request.Timeout = 90000;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            string strResult = streamReader.ReadToEnd();

            streamReader.Close();
            streamReceive.Close();
            request.Abort();
            response.Close();

            return JsonConvert.DeserializeObject<T>(strResult);
        }





        /// <summary>
        /// 用户需要登录Get请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="webApi"></param>
        /// <param name="queryStr"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static DataTable Get(string webApi, string query, string queryStr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webApi + "?" + queryStr);
            request.Method = "GET";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Timeout = 90000;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            XmlDocument doc = new XmlDocument();
            doc = ReadXmlResponse(request.GetResponse());//读取服务端返回的结果

            var dt = ConvertXMLToDataSet(doc.InnerXml);

            return dt.Tables[0];

            //Stream streamReceive = response.GetResponseStream();
            //StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            //string strResult = streamReader.ReadToEnd();
            //streamReader.Close();
            //streamReceive.Close();
            //request.Abort();
            //response.Close();
            //return strResult;
        }

        /// <summary>
        /// 用户需要登录Get请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="webApi"></param>
        /// <param name="queryStr"></param>
        /// <param name="staffId"></param>
        /// <returns></returns>
        public static DataTable Get(string webApi, string query, string queryStr, int timeout)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webApi + "?" + queryStr);
            request.Method = "GET";
            request.ContentType = "application/x-www-form-urlencoded";
            request.Timeout = timeout;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            XmlDocument doc = new XmlDocument();
            doc = ReadXmlResponse(request.GetResponse());//读取服务端返回的结果
            var dt = ConvertXMLToDataSet(doc.InnerXml);
            return dt.Tables[0];
        }

        /// <summary>
        /// 获取XML转DataTable
        /// </summary>
        /// <param name="xmlData"></param>
        /// <returns></returns>
        private static DataSet ConvertXMLToDataSet(string xmlData)
        {
            StringReader stream = null;
            XmlTextReader reader = null;
            try
            {
                DataSet xmlDS = new DataSet();
                stream = new StringReader(xmlData);
                reader = new XmlTextReader(stream);
                xmlDS.ReadXml(reader);
                return xmlDS;
            }
            catch (Exception ex)
            {
                string strTest = ex.Message;
                return null;
            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
        }


        /// <summary>
        /// 读取服务端返回的结果
        /// </summary>
        private static XmlDocument ReadXmlResponse(WebResponse response)
        {
            StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            String retXml = sr.ReadToEnd();
            sr.Close();
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(retXml);
            return doc;
        }

        /// <summary>
        /// 拼接get参数
        /// </summary>
        /// <param name="parames"></param>
        /// <returns></returns>
        public static Tuple<string, string> GetQueryString(Dictionary<string, string> parames)
        {
            // 第一步：把字典按Key的字母顺序排序
            IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parames);
            IEnumerator<KeyValuePair<string, string>> dem = sortedParams.GetEnumerator();

            // 第二步：把所有参数名和参数值串在一起
            StringBuilder query = new StringBuilder("");  //签名字符串
            StringBuilder queryStr = new StringBuilder(""); //url参数
            if (parames == null || parames.Count == 0)
                return new Tuple<string, string>("", "");

            while (dem.MoveNext())
            {
                string key = dem.Current.Key;
                string value = dem.Current.Value;
                if (!string.IsNullOrEmpty(key))
                {
                    query.Append(key).Append(value);
                    queryStr.Append("&").Append(key).Append("=").Append(value);
                }
            }

            return new Tuple<string, string>(query.ToString(), queryStr.ToString().Substring(1, queryStr.Length - 1));
        }

        /// <summary>
        /// 用户需要登录Get请求
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="webApi">API接口</param>
        /// <param name="query">请求接口需要加密的数据</param>
        /// <param name="queryStr">请求接口传递的参数</param>
        /// <param name="token">凭证</param>
        /// <param name="sign">是否需要参数签名</param>
        /// <returns></returns>
        public static T GetAuthorized<T>(string webApi, string query, string queryStr, string token, bool sign = true)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(webApi + "?" + queryStr);
            request.Method = "GET";
            request.ContentType = "application/json";
            request.Timeout = 90000;
            request.Headers.Set("Pragma", "no-cache");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream streamReceive = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(streamReceive, Encoding.UTF8);
            string strResult = streamReader.ReadToEnd();

            streamReader.Close();
            streamReceive.Close();
            request.Abort();
            response.Close();

            return JsonConvert.DeserializeObject<T>(strResult);
        }


    }

}