class NotebooksController < ApplicationController
    before_action :set_notebook, only: [:update, :destroy]

    after_action only: [:index] { set_pagination_headers :notebooks }

    def index
      @notebooks = Notebook.page(page).per(per_page)

      render json: @notebooks
    end

    private
      def set_notebook
        @notebook = Notebook.find(params[:id])
      end

    def notebook_params
      params.require(:notebook).permit!
    end

    def page
      @page ||= params[:page] || 1
    end

    def per_page
      @per_page ||= params[:per_page] || 40
    end

    def set_pagination_headers(v_name)
      pc = instance_variable_get("@#{v_name}")

      headers["X-Total-Count"] = pc.total_count

      links = []
      links << page_link(1, "first") unless pc.first_page?
      links << page_link(pc.prev_page, "prev") if pc.prev_page
      links << page_link(pc.next_page, "next") if pc.next_page
      links << page_link(pc.total_pages, "last") unless pc.last_page?
      headers["Link"] = links.join(",") if links.present?
    end

    def page_link(page, rel)
     base_uri = request.url.split("?").first

    end
end