using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Security.Cryptography;
using System.Text;
using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using RT.Application.Services.Contract;

namespace RT.Application.Services.Implementation;

public class TokenService(IConfiguration configuration) : ITokenService
{
    public (string token, DateTime expiresAt) GenerateToken(string userId, string email, string userName)
    {
        var key     = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["Jwt:Key"]!));
        var creds   = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
        var expires = DateTime.UtcNow.AddMinutes(double.Parse(configuration["Jwt:ExpiresMinutes"] ?? "60"));

        var claims = new[]
        {
            new Claim(JwtRegisteredClaimNames.Sub,   userId),
            new Claim(JwtRegisteredClaimNames.Email, email),
            new Claim(JwtRegisteredClaimNames.Name,  userName),
            new Claim(JwtRegisteredClaimNames.Jti,   Guid.NewGuid().ToString()),
        };

        var token = new JwtSecurityToken(
            issuer:   configuration["Jwt:Issuer"],
            audience: configuration["Jwt:Audience"],
            claims:   claims,
            expires:  expires,
            signingCredentials: creds);

        return (new JwtSecurityTokenHandler().WriteToken(token), expires);
    }

    public (string token, DateTime expiresAt) GenerateRefreshToken()
    {
        var token   = Convert.ToBase64String(RandomNumberGenerator.GetBytes(64));
        var expires = DateTime.UtcNow.AddDays(double.Parse(configuration["Jwt:RefreshExpiresDays"] ?? "7"));
        return (token, expires);
    }
}