using System.Text;
using Galaeth.Core.Configuration;
using Microsoft.IdentityModel.Tokens;

namespace Galaeth.ApiServer.Extensions;

/// <summary>
/// Extensions for <see cref="JwtConfiguration"/>.
/// </summary>
public static class JwtConfigurationExtensions
{
    /// <summary>
    /// Generate an instance of <see cref="TokenValidationParameters"/> from <see cref="JwtConfiguration"/>.
    /// </summary>
    /// <param name="config">Instance of <see cref="JwtConfiguration"/>.</param>
    /// <returns>Instance of <see cref="TokenValidationParameters"/>.</returns>
    public static TokenValidationParameters ToTokenValidationParameters(this JwtConfiguration config)
    {
        return new TokenValidationParameters()
        {
            ValidateIssuer = config.ValidateIssuer,
            ValidateAudience = config.ValidateAudience,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidAudience = config.Audience,
            ValidAudiences =
                [config.Audience],
            ValidIssuer = config.Issuer,
            IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(config.SecretKey)),
        };
    }
}