namespace Dpz.Core.Auth;

public static class AuthHelper
{
    private const string ShellViewPath = "~/Views/Shared/_Shell.cshtml";

    public const string UserVerificationRequiredMessage =
        "Passkey 未完成用户验证。请重新点击 Passkey 登录，并在浏览器弹窗中选择 Windows Hello、PIN、指纹或人脸验证；如果仍失败，请重新绑定 Passkey。";

    public const string GenericWebAuthnVerificationFailureMessage = "Passkey 验证失败，请重新开始";

    public static string ToBase64Url(byte[] source)
    {
        return Convert.ToBase64String(source).TrimEnd('=').Replace('+', '-').Replace('/', '_');
    }

    public static byte[] FromBase64Url(string source)
    {
        var value = source.Replace('-', '+').Replace('_', '/');
        return Convert.FromBase64String(
            value.PadRight(value.Length + (4 - value.Length % 4) % 4, '=')
        );
    }

    public static bool IsUserVerificationRequired(Fido2VerificationException exception) =>
        exception.Message.Contains("User Verified flag not set", StringComparison.Ordinal);

    extension(Controller controller)
    {
        public ViewResult ShellView(AuthShellViewModel model)
        {
            return controller.View(ShellViewPath, model);
        }
    }

    extension<T>(IPagedList<T> pagedList)
    {
        public ResponseResult<PagedListWarp<T>> ToPagedResult()
        {
            return ResponseResult<PagedListWarp<T>>.Ok(pagedList.ToPagedListWarp());
        }
    }

    extension<T>(ActionResult<T> result)
    {
        public ResponseResult<T> ToResponseResult()
        {
            if (result.Value is not null)
            {
                return ResponseResult<T>.Ok(result.Value);
            }

            return result.Result switch
            {
                OkObjectResult { Value: T value } => ResponseResult<T>.Ok(value),
                BadRequestObjectResult badRequest => ResponseResult<T>.Fail(
                    badRequest.Value?.ToString() ?? "上传失败"
                ),
                ObjectResult { Value: string message } => ResponseResult<T>.Fail(message),
                _ => ResponseResult<T>.Fail("上传失败"),
            };
        }
    }
}