class SvelteOnRails::TurboStream

def configs
  @configs ||= begin
                 conf = SvelteOnRails::Configuration.instance
                 unless conf.configs[:turbo_stream]
                   raise '[svelte-on-rails] missing configuration: :turbo_stream'
                 end
                 unless conf.configs[:turbo_stream]['target_html_id']
                   raise '[svelte-on-rails] missing configuration: turbo_stream/target_html_id'
                 end
                 unless conf.configs[:turbo_stream]['channel']
                   raise '[svelte-on-rails] missing configuration: turbo_stream/channel'
                 end
                 conf.configs[:turbo_stream]
               end
end

def dispatch_event(event: 'stream-action', event_detail: nil, selector: nil, component: nil, channel: nil)
  if event != 'stream-action' && !selector
    raise "Another event name than the default one is only possible together with a selector"
  end
  args = {
    eventDetail: event_detail,
    component: component,
    event: event,
    selector: selector
  }
  args_enc = Base64.strict_encode64(args.to_json)
  Turbo::StreamsChannel.send(
    "broadcast_append_to",
    channel || configs['channel'],
    target: configs['target_html_id'],
    content: "<div style=\"display: none;\" data-controller=\"svelte-on-rails-turbo-stream\" data-args=\"#{args_enc}\"></div>"
  )
end