using Gdsi.Config;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace Gdsi.Helper
{
    public class Http
    {
		private static string smethod_0(string string_0)
		{
			byte[] bytes = Encoding.UTF8.GetBytes(string_0);
			byte[] array = SHA256.Create().ComputeHash(bytes);
			StringBuilder stringBuilder = new StringBuilder();
			for (int i = 0; i < array.Length; i++)
			{
				stringBuilder.Append(array[i].ToString("x2"));
			}
			return stringBuilder.ToString();
		}

		private static string smethod_1()
		{
			return Convert.ToInt64((DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds).ToString();
		}

		private static string smethod_2(int int_0, bool bool_0, bool bool_1, bool bool_2, bool bool_3, string string_0 = "")
		{
			byte[] array = new byte[4];
			new RNGCryptoServiceProvider().GetBytes(array);
			Random random = new Random(BitConverter.ToInt32(array, 0));
			string text = null;
			string text2 = string_0;
			if (bool_0)
			{
				text2 += "0123456789";
			}
			if (bool_1)
			{
				text2 += "abcdefghijklmnopqrstuvwxyz";
			}
			if (bool_2)
			{
				text2 += "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
			}
			if (bool_3)
			{
				text2 += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
			}
			for (int i = 0; i < int_0; i++)
			{
				text += text2.Substring(random.Next(0, text2.Length - 1), 1);
			}
			return text;
		}

		public static string HttpPostByHeader(string url, string param, Dictionary<string, string> dicHeader = null)
		{
			HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
			httpWebRequest.Method = "POST";
			httpWebRequest.ContentType = "application/json;charset=UTF-8";
			if (dicHeader == null)
			{
				dicHeader = new Dictionary<string, string>();
				string text = smethod_1();
				string text2 = smethod_2(32, bool_0: true, bool_1: true, bool_2: false, bool_3: false);
				string value = GdsiConfig.paasid;
				string text3 = GdsiConfig.key;
				string value2 = smethod_0(text + text3 + text2 + text);
				dicHeader.Add("x-tif-paasid", value);
				dicHeader.Add("x-tif-signature", value2);
				dicHeader.Add("x-tif-timestamp", text);
				dicHeader.Add("x-tif-nonce", text2);
			}
			if (dicHeader != null && dicHeader.Count != 0)
			{
				foreach (KeyValuePair<string, string> item in dicHeader)
				{
					httpWebRequest.Headers.Add(item.Key, item.Value);
				}
			}
			byte[] bytes = Encoding.UTF8.GetBytes(param);
			httpWebRequest.ContentLength = bytes.Length;
			string text4 = "";
			try
			{
				Stream requestStream = httpWebRequest.GetRequestStream();
				requestStream.Write(bytes, 0, bytes.Length);
				requestStream.Close();
				HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
				Stream responseStream = httpWebResponse.GetResponseStream();
				string text5 = "";
				StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
				while ((text5 = streamReader.ReadLine()) != null)
				{
					text4 += text5;
				}
				return text4;
			}
			catch (Exception ex)
			{
				return ex.Message;
			}
		}
	}
}