Elegant way of handling multiple pool/sites IIS with Puppet

init.pp

class iis_server (
  $log_dir = 'E:\logs',
  $app_dir = 'E:\apps',
  Array[Hash] $site_instances = []
) {

# FYI, IIS allows pools of websites to be run in their own process and pool can have many sites
# IIS sites can also have many applications that run under the site context
  Class['iis_server::install'] -> Class['iis_server::defaults']

  include iis_server::install
  class{ 'iis_server::defaults':
    app_dir => $app_dir,
    log_dir => $log_dir,
  }
  $site_instances.each | Hash $instance| {
     iis_server::config{$instance['site_name']
       ensure                      => $instance['ensure'],
       application_pool_name       => $instance['pool_name'],
       site_name                   => $instance['site_name'],
       application_name            => $instance['application_name'],
       enable_ssl                  => true,
       web_port                    => $instance['web_port'],
       web_root                    => $inet_pub_www_root,
     }
  }
}