using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using EasyCode.Core;
using EasyCode.Core.Data;
using EasyCode.Data;
using EasyCode.Entity;
using EasyCode.IService;
using EasyCode.ViewModel;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

namespace EasyCode.Service
{
 public class TokenProviderService : ITokenProviderService
 {
 private TokenProviderOptions _options;
 private IUnitOfWork<EasyCodeContext> _unitOfWork;
 public TokenProviderService(TokenProviderOptions options, IUnitOfWork<EasyCodeContext> unitOfWork)
 {
 _options = options;
 _unitOfWork = unitOfWork;
 }
 public ResponseTokenViewModel GeTokenViewModel(string username,string userid)
 {
 var refreshtoken = Guid.NewGuid().ToString("N");
 var now = DateTime.UtcNow;
 
 var claims = new List<Claim>()
 {
 new Claim(JwtRegisteredClaimNames.NameId,""),
 new Claim(JwtRegisteredClaimNames.Jti, ""),
 new Claim(JwtRegisteredClaimNames.Iat, new DateTimeOffset(now).ToUniversalTime().ToUnixTimeSeconds().ToString(), ClaimValueTypes.Integer64),
 new Claim(JwtRegisteredClaimNames.Sub, username),
 };
 var jwt = new JwtSecurityToken(
 issuer: _options.Issuer,
 audience: _options.Audience,
 claims: claims.ToArray(),
 notBefore: now,
 expires: now.AddMinutes(_options.Expiration),
 signingCredentials: new SigningCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(_options.SecretKey)), SecurityAlgorithms.HmacSha256));
 var encodedJwt = new JwtSecurityTokenHandler().WriteToken(jwt);
 _unitOfWork.DbContext.SysUserTokenses.Add(new SysUserTokens(){ ExpiresUtc = DateTime.UtcNow,Token = encodedJwt,UserId = userid, Value = refreshtoken,LoginProvider = "",Name = username});
 _unitOfWork.SaveChanges();
 ResponseTokenViewModel model = new ResponseTokenViewModel()
 {
 access_token = encodedJwt,
 refresh_token = refreshtoken,
 expires_in = (int)TimeSpan.FromSeconds(_options.Expiration*60).TotalSeconds,
 userName = username,
 firstname = username,
 lastname = username,
 createtime = DateTime.Now
 };
 return model;
 }

 public ResponseTokenViewModel GetRefreshToken(string refreshToken)
 {
 var model = GeTokenViewModel("","");
 return model;
 }
 }
}