using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using Newtonsoft.Json;

namespace WebAPIBase.Utils
{
    /// <summary>
    /// 使用HttpWebRequest远程访问
    /// </summary>
    public class HttpWebRequestHelper
    {
        public static string RequestPost(string url, List<Dictionary<string, string>> requestdata)
        {
            try
            {
                string requestBody = "";
                byte[] postData = null;
                if (requestdata != null)
                {
                    requestBody = JsonConvert.SerializeObject(requestdata);
                    //using (Stream postStream = new MemoryStream())
                    //{
                    //    byte[] postData = Encoding.ASCII.GetBytes(requestBody);                        
                    //    postStream.Write(postData, 0, postData.Length);
                    //}
                    postData = Encoding.UTF8.GetBytes(requestBody);
                }
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
                req.ContentType = "application/json";
                //req.MediaType = "application/json";
                //req.Accept = "application/json";
                req.Method = "POST";
                req.ContentLength = postData == null ? 0 : postData.Length;

                //WebHeaderCollection headers = new WebHeaderCollection();
                //headers.Add("Authorization: Token" + authtoken);
                //httpWebRequest.Headers = headers;

                if (!string.IsNullOrEmpty(requestBody))
                {
                    using (Stream postStream = req.GetRequestStream())
                    {
                        postStream.Write(postData, 0, postData.Length);
                    }
                }
                HttpWebResponse res = (HttpWebResponse)req.GetResponse(); // Fails on this line. 
                using (StreamReader streamReader = new StreamReader(res.GetResponseStream()))
                {
                    string json = streamReader.ReadToEnd();
                    //LogHelper.Info("request json:" + json);
                    return json;
                }
            }
            catch (Exception ex)
            {
                throw;
            }
        }

        public static string RequestGet(string url, List<Dictionary<string, string>> requestdata)
        {
            var loginName = "";
            var pwd = "";
            foreach(var item in requestdata)
            {
                if(item.ContainsKey("loginName"))
                {
                    loginName = item["loginName"];
                }
                if(item.ContainsKey("pwd"))
                {
                    pwd = item["pwd"];
                }
            }
            url = url + "?loginName=" + loginName + "&pwd=" + pwd;
            NLog.LogManager.GetCurrentClassLogger().Info("url:" + url);
            try
            {
               
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
                //req.ContentType = "application/json";
                //req.MediaType = "application/json";
                //req.Accept = "application/json";
                req.Method = "GET";
                
                HttpWebResponse res = (HttpWebResponse)req.GetResponse(); // Fails on this line. 
                using (StreamReader streamReader = new StreamReader(res.GetResponseStream()))
                {
                    string json = streamReader.ReadToEnd();
                    //LogHelper.Info("request json:" + json);
                    return json;
                }
            }
            catch (Exception ex)
            {
                throw;
            }
        }

    }
}