using JWT.Algorithms;
using JWT.Builder;
using JWT.Exceptions;
using Org.BouncyCastle.Asn1.Pkcs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WMS.Util;

namespace WMS.BZUtil
{
    public interface IOperator
    {
        /// <summary>
        /// 生成jwt令牌
        /// </summary>
        /// <param name="userId">用户id</param>
        /// <param name="userName">用户名称</param>
        /// <param name="account">用户账号</param>
        /// <returns></returns>
        string EncodeToken(string userId, string userName, string account, string EncryptTokenNo, string warehouseNo);
        /// <summary>
        /// 解密jwt令牌
        /// </summary>
        /// <param name="token">令牌</param>
        /// <returns>TokenExpiredException 时间过期,SignatureVerificationException 签证不正确</returns>
        string DecodeToken(string token);
    }
    public class Operator : IOperator
    {        
        /// <summary>
        /// 生成jwt令牌
        /// </summary>
        /// <param name="userId">用户id</param>
        /// <param name="userName">用户名称</param>
        /// <param name="account">用户账号</param>
        /// <returns></returns>
        public string EncodeToken(string userId, string userName, string account,string EncryptTokenNo,string warehouseNo)
        {
            var token = new JwtBuilder()
            .WithAlgorithm(new HMACSHA256Algorithm())
            .WithSecret(ConfigHelper.GetConfig().JwtSecret)
            .AddClaim("iat", DateTimeOffset.UtcNow.ToUnixTimeSeconds())
            .AddClaim("exp", DateTimeOffset.UtcNow.AddHours(ConfigHelper.GetConfig().JwtExp).ToUnixTimeSeconds()) // 设置12小时过期
            .AddClaim("UserId", userId).AddClaim("UserName", userName).AddClaim("Account", account).AddClaim("EncryptTokenNo", EncryptTokenNo).AddClaim("WarehouseNo", warehouseNo)
            .Encode();

            return token;
        }
        /// <summary>
        /// 解密jwt令牌
        /// </summary>
        /// <param name="token">令牌</param>
        /// <returns>TokenExpiredException 时间过期,SignatureVerificationException 签证不正确</returns>
        public string DecodeToken(string token)
        {
            try
            {
                var json = new JwtBuilder()
                    .WithAlgorithm(new HMACSHA256Algorithm())
                    .WithSecret(ConfigHelper.GetConfig().JwtSecret)
                    .MustVerifySignature()
                    .Decode(token);
                return json;
                //Console.WriteLine(json);
            }
            catch (TokenExpiredException)
            {
                return "TokenExpiredException";
                //Console.WriteLine("Token has expired");
            }
            catch (SignatureVerificationException)
            {
                return "SignatureVerificationException";
                //Console.WriteLine("Token has invalid signature");
            }
        }
    }

    /// <summary>
    /// 令牌中的信息
    /// </summary>
    public class Payload
    {
        /// <summary>
        /// 用户Id
        /// </summary>
        public string UserId { get; set; }
        /// <summary>
        /// 用户名称
        /// </summary>
        public string UserName { get; set; }
        /// <summary>
        /// 用户账号
        /// </summary>
        public string Account { get; set; }

        public string WarehouseNo { get; set; }

        public string EncryptTokenNo { get; set; }
    }
}