using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using JWT;
using JWT.Algorithms;
using JWT.Serializers;
using JWT.Builder;
using JWT.Exceptions;

namespace WebApplication1
{
    public  static class JwtHelper
    {
        static string secret = System.Configuration.ConfigurationManager.AppSettings["secret"].ToString();

        public static string CreateTocken(string UserName)
        {

            var tocken=JwtBuilder.Create().WithAlgorithm(new HMACSHA256Algorithm())
            .ExpirationTime(DateTime.Now.AddMinutes(10))
            .WithSecret(secret)
            .AddClaim("UserName",UserName)
            .AddClaim("DateTime",DateTime.Now)
            .WithValidationParameters(
                new ValidationParameters
                {
                   ValidateExpirationTime = true,
                }).Encode(); ;
           
            return tocken;
        }

        public static bool Validate(string tocken)
        {
            try
            {
                var mes = JwtBuilder.Create()
                                  .WithAlgorithm(new HMACSHA256Algorithm())
                                  .WithSecret(secret)
                                  .Decode(tocken);
                return true;
             
            }
            catch (TokenNotYetValidException )
            {

                throw new Exception("Token is not valid yet");
            }
            catch (TokenExpiredException)
            {
                throw new Exception("Token has expired");
            }
            catch (SignatureVerificationException)
            {
                throw new Exception("Token has invalid signature");
            }

        }

    }
}