using System;
using System.Collections.Generic;
using System.Timers;
using System.Web;
using System.Web.Configuration;

namespace CommonTool
{
    /// <summary>
    /// Session 帮助类
    /// </summary>
    public class SessionHelper
    {
		public static SessionHelper Instance { get; } = new SessionHelper();

		public void AddSessionUser<T>(T user,string sessionName= "SESSION_USER")
        {
            HttpContext rq = HttpContext.Current;
			rq.Session[sessionName] = user;
		}
        public T GetSessionUser<T>(string sessionName = "SESSION_USER")
        {
            try 
            { 
                HttpContext rq = HttpContext.Current;
                return (T)rq.Session[sessionName];
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
        }
		public void Clear(string sessionName = "SESSION_USER")
        {
            HttpContext rq = HttpContext.Current;
            rq.Session[sessionName] = null;
        }
    
		/// <summary>
		/// 添加Session，调动有效期为20分钟
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <param name="strValue">Session值</param>
		public void AddSession(string strSessionName, string strValue)
		{
			AddSession(strSessionName, strValue, 20);
		}

		/// <summary>
		/// 添加Session
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <param name="strValue">Session值</param>
		/// <param name="iExpires">调动有效期（分钟）</param>
		public void AddSession(string strSessionName, string strValue, int iExpires)
		{
			if (HttpContext.Current.Session[strSessionName] != null)
				DelSession(strSessionName);
			HttpContext.Current.Session[strSessionName] = strValue;
			HttpContext.Current.Session.Timeout = iExpires;
		}

		/// <summary>
		/// 添加Session数组，调动有效期为20分钟
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <param name="strValues">Session值数组</param>
		public void AddSessions(string strSessionName, string[] strValues)
		{
			AddSessions(strSessionName, strValues, 20);
		}

		/// <summary>
		/// 添加Session数组
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <param name="strValues">Session值数组</param>
		/// <param name="iExpires">调动有效期（分钟）</param>
		public void AddSessions(string strSessionName, string[] strValues, int iExpires)
		{
			if (HttpContext.Current.Session[strSessionName] != null)
				DelSession(strSessionName);
			HttpContext.Current.Session[strSessionName] = strValues;
			HttpContext.Current.Session.Timeout = iExpires;
		}

		/// <summary>
		/// 读取某个Session对象值
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <returns>Session对象值</returns>
		public string GetSession(string strSessionName)
		{
			return HttpContext.Current.Session[strSessionName] == null 
				? null 
				: HttpContext.Current.Session[strSessionName].ToString();
		}

		/// <summary>
		/// 读取某个Session对象值数组
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		/// <returns>Session对象值数组</returns>
		public string[] GetSessions(string strSessionName)
		{
			return HttpContext.Current.Session[strSessionName] == null
				? null
				: (string[]) HttpContext.Current.Session[strSessionName];
		}

		/// <summary>
		/// 删除某个Session对象
		/// </summary>
		/// <param name="strSessionName">Session对象名称</param>
		public void DelSession(string strSessionName)
		{
			HttpContext.Current.Session[strSessionName] = null;
		}
	}

	public class UserListSession
	{
		public UserListSession()
		{
			var timer = new Timer(5000);
			timer.Elapsed += myTimer_Elapsed;
			timer.Enabled = true;
			timer.AutoReset = true;
		}
		private void myTimer_Elapsed(object source, ElapsedEventArgs e)
		{
			List<SysUserInfo> expireUser = new List<SysUserInfo>();
			foreach (string key in M.Keys)
			{
				SysUserInfo userinfo = M[key];
				if (userinfo.IsExpire())
				{
					expireUser.Add(userinfo);
				}
			}
			foreach (SysUserInfo t in expireUser)
			{
				M.Remove(t.UserGuid);
				LogHelper.Info(t.UserNo + "超时，被清空！");
			}
			expireUser.Clear();
		}

		public static UserListSession Instance = new UserListSession();

		/// <summary>
		/// 检查用户的登录是否有效
		/// </summary>
		/// <returns></returns>
		public bool CheckLogin(UserType userType=UserType.GeneralUser)
		{
			bool lbRetval = false;
			string lcSessionName = WebConfigurationManager.AppSettings["UserInfoSession"];
			if (userType!=UserType.GeneralUser)
			{
				lcSessionName = WebConfigurationManager.AppSettings["SysUserInfoSession"];
			}
			string lcToken = SessionHelper.Instance.GetSession(lcSessionName);
			SessionHelper.Instance.DelSession(lcSessionName);
			if (string.IsNullOrEmpty(lcToken))
				return false;
			if (CheckLogin(lcToken))
			{
				SessionHelper.Instance.AddSession(lcSessionName, lcToken, 30);
				lbRetval = true;
			}
			return lbRetval;
		}
		/// <summary>
		/// 根据Token检查用户登录
		/// </summary>
		/// <param name="pcToken">Token</param>
		/// <returns></returns>
		public bool CheckLogin(string pcToken)
		{
			return Instance.IsContainsKey(pcToken);
		}

		public Dictionary<string, SysUserInfo> M = new Dictionary<string, SysUserInfo>();
		public void Add(String guid, SysUserInfo poUserInfo) => M.Add(guid, poUserInfo);

		public SysUserInfo GetUserInfoBySession(string pcSessionName)
		{
			//string lcSessionName = WebConfigurationManager.AppSettings["UserInfoSession"];
			string lcToken = SessionHelper.Instance.GetSession(pcSessionName);
			SessionHelper.Instance.DelSession(pcSessionName);
			if (string.IsNullOrEmpty(lcToken))
				return null;
			SessionHelper.Instance.AddSession(pcSessionName, lcToken, 30);
			return GetUserInfoByGuid(lcToken);
		}
		public SysUserInfo GetUserInfoByGuid(String pcGuid)
		{
			if (IsContainsKey(pcGuid))
			{
				return M[pcGuid];
			}
			return null;
		}
		public bool IsContainsKey(String pcGuid)
		{
			if (M.ContainsKey(pcGuid))
			{
				if (!M[pcGuid].IsExpire())
				{
					M[pcGuid].RefreshTime();
					return true;
				}
				M.Remove(pcGuid);
				return false;
			}
			return false;
		}
	}

	public class SysUserInfo
	{
		public SysUserInfo(string pcUserNo, string pcPassword, string pcUserName = "", UserType pcUserType = UserType.GeneralUser)
		{
			LastDateTime = DateTime.Now;
			UserNo = pcUserNo;
			Password = pcPassword;
			UserName = pcUserName;
			UserType = pcUserType;
		}

		public string UserNo { get; set; }
		public string Password { get; set; }
		public string UserName { get; set; }
		public UserType UserType { get; set; }
		public string UserGuid { get; set; }
		public DateTime LastDateTime { get; set; }
		public void RefreshTime() => LastDateTime = DateTime.Now;
		public bool IsExpire() => DateTime.Now > LastDateTime.AddHours(1);
	}

	public enum UserType
	{
		GeneralUser,
		SysUser,
		TeacherUser,
		SuperSysUser,
		Vip1,
		Vip2,
		Vip3,
		Vip4,
		Vip5,
		Vip6,
		Vip7
	}
}