using learun.util;
using System;
using System.Text;
using System.Threading.Tasks;

namespace learun.wechat
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.06
	/// 描 述：Token
	/// </summary>
	public class Token
	{
		/// <summary>
		///
		/// </summary>
		public static Token _Token;

		/// <summary>
		///
		/// </summary>
		public string access_token { get; set; }

		/// <summary>
		///
		/// </summary>
		public int expires_in { get; set; }

		private DateTime createTokenTime = DateTime.Now;

		/// <summary>
		/// 到期时间(防止时间差，提前1分钟到期)
		/// </summary>
		/// <returns></returns>
		public DateTime TookenOverdueTime
		{
			get { return createTokenTime.AddSeconds(expires_in - 60); }
		}

		/// <summary>
		/// 刷新Token
		/// </summary>
		public static async Task Renovate()
		{
			if (_Token == null)
			{
				await GetNewToken();
			}

			Token._Token.createTokenTime = DateTime.Now;
		}

		/// <summary>
		///
		/// </summary>
		/// <returns></returns>
		public static async Task<bool> IsTimeOut()
		{
			if (_Token == null)
			{
				await GetNewToken();
			}

			return DateTime.Now >= Token._Token.TookenOverdueTime;
		}

		/// <summary>
		///
		/// </summary>
		/// <returns></returns>
		public static async Task<Token> GetNewToken()
		{
			string strulr = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid={0}&corpsecret={1}";

			string corpID = ConfigHelper.GetConfig().CorpId; //企业ID
			string Secret = ConfigHelper.GetConfig().CorpSecret;//管理员组ID

			HttpHelper http = new HttpHelper();

			string respone = await http.Get(string.Format(strulr, corpID, Secret), Encoding.UTF8);

			var token = respone.ToObject<Token>();

			Token._Token = token;

			return token;
		}

		/// <summary>
		///
		/// </summary>
		/// <returns></returns>
		public static async Task<string> GetToken()
		{
			if (_Token == null)
			{
				await GetNewToken();
			}
			return _Token.access_token;
		}
	}
}