module CountsListing
  extend ActiveSupport::Concern

  def index
    locale = resolve_locale!
    resource = is_a?(CountsPostsController) ? 'posts' : 'tags'
    query = CountsQuery.new(version_scope, resource, request.query_parameters.except('locale')
        .merge('locale' => locale.code))
    result = { count: query.count, page: query.page, limit: query.limit }
    if query.mode == 'summary'
      result.merge!(query.summary)
    else
      result[:versions] = CountsVersionRepr.many(
          query.details, resource:, language_code: locale.language_code)
    end
    render json: result
  rescue ArgumentError, TypeError
    head :bad_request
  end
end