using System;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using Newtonsoft.Json;

namespace Server.Helper;

internal class DingDing
{
	public static void Send(string WebHook, string secret, string content)
	{
		_ = DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0, 0);
		long num = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000L) / 10000;
		string s = num + "\n" + secret;
		ASCIIEncoding aSCIIEncoding = new ASCIIEncoding();
		byte[] bytes = aSCIIEncoding.GetBytes(secret);
		byte[] bytes2 = aSCIIEncoding.GetBytes(s);
		string text;
		using (HMACSHA256 hMACSHA = new HMACSHA256(bytes))
		{
			text = HttpUtility.UrlEncode(Convert.ToBase64String(hMACSHA.ComputeHash(bytes2)), Encoding.UTF8);
		}
		string text2 = WebHook + "&timestamp=" + num + "&sign=" + text;
		string s2 = JsonConvert.SerializeObject(new
		{
			msgtype = "text",
			text = new { content }
		});
		Console.WriteLine(text2);
		HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(text2);
		httpWebRequest.Method = "POST";
		httpWebRequest.ContentType = "application/json;charset=utf-8";
		byte[] bytes3 = Encoding.UTF8.GetBytes(s2);
		httpWebRequest.ContentLength = bytes3.Length;
		using (Stream stream = httpWebRequest.GetRequestStream())
		{
			stream.Write(bytes3, 0, bytes3.Length);
		}
		using StreamReader streamReader = new StreamReader(((HttpWebResponse)httpWebRequest.GetResponse()).GetResponseStream(), Encoding.UTF8);
		streamReader.ReadToEnd();
	}
}