// <copyright file="JwtOptionsExtensions.cs" company="alveus.dev">
// Copyright (c) alveus.dev. All rights reserved. Licensed under the MIT License.
// </copyright>

using System.Text;
using Astral.Core.Options;
using Microsoft.IdentityModel.Tokens;

namespace Astral.ApiServer.Extensions;

/// <summary>
/// Extensions for <see cref="JwtOptions" />.
/// </summary>
public static class JwtOptionsExtensions
{
    /// <summary>
    /// Generate an instance of <see cref="TokenValidationParameters" /> from <see cref="JwtOptions" />.
    /// </summary>
    /// <param name="config">Instance of <see cref="JwtOptions" />.</param>
    /// <returns>Instance of <see cref="TokenValidationParameters" />.</returns>
    public static TokenValidationParameters ToTokenValidationParameters(this JwtOptions 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))
        };
    }
}