require "ui_bibz/ui/ux/table/components/store"
module UiBibz::Ui::Ux

  # Create a select pagination per page
  #
  # ==== Attributes
  #
  # * +options+ - Options of element
  # * +html_options+ - Html Options of element
  #
  # ==== Options
  #
  # You can add HTML attributes using the +html_options+.
  # You can pass arguments in options attribute:
  # * +store+ - Store generate by '+table_search_pagination+' method
  #
  # ==== Signatures
  #
  #   UiBibz::Ui::Ux::TablePaginationPerPage.new(store: @store)
  #
  # ==== Helper
  #
  #    table_pagination_per_page(options = {})
  #
  class TablePaginationPerPage < UiBibz::Ui::Base
    include WillPaginate::ActionView

    # Initialize per_page_field with component item
    # per_page_field require WillPaginate gem
    def initialize options = nil, html_options = nil
      @per_page_field = UiBibz::Ui::Core::Component.new nil, options, html_options
    end

    # Render html tag
    def render
      if @per_page_field.options[:wrap_form] != false
        form_tag(url_for(url_parameters), method: :get) do
          per_page_html
        end
      else
        per_page_html
      end
    end

  private

    def store
      @store ||= if @per_page_field.options[:store].nil?
        raise 'Store is nil!'
      elsif @per_page_field.options[:store].try(:records).nil?
        raise 'Store can be created only with "table_search_pagination" method!'
      else
        Store.new @per_page_field.options.delete :store
      end
    end

    def url_parameters
      { controller: store.controller, action: store.action, id: store.param_id }
    end

    def per_page_html
      content_tag :div, class: 'table-pagination-per-page' do
        concat results_count_html
        concat UiBibz::Utils::Internationalization.new("ui_bibz.table.pagination.per_page", default: "Per page: ").translate
        concat select_tag('per_page', options_for_select([5, 10, 20, 30, 50, 100, 200, 500], store.per_page), class: 'form-control')
        concat tag(:input, type: 'hidden', name: 'store_id', value: store.id) unless store.id.nil? # If there is more 1 table in html page
      end
    end

    def results_count_html
      "#{ page_entries_info store.records } | ".html_safe
    end

    def from_current_results
      store.limit_value * store.current_page - store.limit_value + 1
    end

    def to_current_results
      store.limit_value * store.current_page
    end

  end
end