module RailsConnector
  class ObjParamsParser
    def initialize(host, port)
      @host = host
      @port = port
    end

    def parse(obj, params)
      raise "Required parameter 'obj' is missing." unless params.present?
      raise "Parameter 'obj' is not a hash." unless params.is_a?(Hash)

      if obj
        convert_params(params, obj)

        if widget_pool_params = params['_widget_pool']
          convert_widget_pool_params(widget_pool_params, obj)
        end
      end

      params
    end

    private

    def convert_widget_pool_params(widget_pool_params, obj)
      widget_pool_params.each_pair do |widget_id, widget_params|
        widget = obj.widget_from_pool(widget_id)

        if widget_params.present?
          convert_params(widget_params, widget)
        end
      end
    end

    def convert_params(params, obj)
      params.each do |key, value|
        type = obj.type_of_attribute(key.to_s)

        params[key] = case type
        when 'html'
          ContentConversion.convert_html_links(value, @host, @port)
        when 'linklist'
          ContentConversion.convert_linklist_urls(value, @host, @port)
        else
          value
        end
      end
    end
  end
end