require_relative 'link'

module CCS
  module Components
    module GovUK
      class Footer < Base
        # = GOV.UK Footer Navigation
        #
        # The individual footer navigation item
        #
        # @!attribute [r] title
        #   @return [String] Title for the navigation section
        # @!attribute [r] navigation_links
        #   @return [Array<Link>] An array of the initialised navigation links
        # @!attribute [r] width
        #   @return [String] Width of the navigation section
        # @!attribute [r] columns
        #   @return [Integer] Number of columns to display the links in

        class Navigation
          include ActionView::Context
          include ActionView::Helpers

          private

          attr_reader :title, :navigation_links, :width, :columns

          public

          # @param title [String] the title for the navigation section
          # @param items [Array<Hash>] an array of links for the navigation section.
          #                            See {Components::GovUK::Footer::Link#initialize Link#initialize} for details of the items in the array.
          # @param width [String] ('full') width of each navigation section in the footer
          # @param columns [Integer] (nil) number of columns to display the links
          # @param context [ActionView::Base] the view context

          def initialize(title:, items:, context:, width: nil, columns: nil)
            @title = title
            @navigation_links = items.map { |navigation_link| Link.new(li_class: 'govuk-footer__list-item', context: context, **navigation_link) }
            @width = width || 'full'
            @columns = columns
          end

          # Generates the HTML for the GOV.UK Footer Navigation sections
          #
          # @return [ActiveSupport::SafeBuffer]

          def render
            tag.div(class: "govuk-footer__section govuk-grid-column-#{width}") do
              concat(tag.h2(title, class: 'govuk-footer__heading govuk-heading-m'))
              concat(tag.ul(class: "govuk-footer__list #{"govuk-footer__list--columns-#{columns}" if columns}".rstrip) do
                navigation_links.each { |navigation_link| concat(navigation_link.render) }
              end)
            end
          end
        end
      end
    end
  end
end