using Microsoft.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using vendorApproverBackend.Entities;

namespace vendorApproverBackend.Services;

public class TokenService
{
    private readonly IConfiguration _config;

    public TokenService(IConfiguration config)
    {
        _config = config;
    }

    public string CreateToken(User user)
    {
        var userRole = user.Role.ToString().Replace("ROLE_", "");

        var claims = new List<Claim>
        {
            new Claim(ClaimTypes.Name, user.Username),
            new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
            new Claim(ClaimTypes.Email, user.Email),
            new Claim(ClaimTypes.Role, userRole)
        };

        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config["Jwt:Key"]));
        var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha512Signature);

        var tokenDescriptor = new SecurityTokenDescriptor
        {
            Subject = new ClaimsIdentity(claims),
            Expires = DateTime.Now.AddDays(7),
            SigningCredentials = creds,
            Issuer = _config["Jwt:Issuer"],
            Audience = _config["Jwt:Audience"]
        };

        var tokenHandler = new JwtSecurityTokenHandler();
        var token = tokenHandler.CreateToken(tokenDescriptor);

        return tokenHandler.WriteToken(token);
    }
}