require 'action_view'

module CCS::Components
  module GovUK
    class StepByStepNavigation < Base
      class Section < Base
        # = GOV.UK Step by step navigation section heading
        #
        # The heading for a navigation section
        #
        # @!attribute [r] text
        #   @return [String] Text for the section heading
        # @!attribute [r] index
        #   @return [String] Index of the section
        # @!attribute [r] logic
        #   @return [String] Optional text to show in the sidebar

        class Heading
          include ActionView::Context
          include ActionView::Helpers

          private

          attr_reader :text, :index, :logic

          public

          # @param text [String] text for the section heading
          # @param index [String] the index of the section
          # @param logic [String] text to show instead of a number in the sidebar

          def initialize(text:, index:, logic: nil)
            @text = text
            @index = index
            @logic = logic
          end

          # rubocop:disable Metrics/AbcSize

          # Generates the HTML for the GOV.UK Step by step navigation section heading
          #
          # @return [ActiveSupport::SafeBuffer]

          def render
            tag.div(class: 'gem-c-step-nav__header js-toggle-panel', data: { position: index }) do
              tag.h2(class: 'gem-c-step-nav__title') do
                concat(tag.span(class: "gem-c-step-nav__circle gem-c-step-nav__circle--#{logic ? 'logic' : 'number'}") do
                  tag.span(class: 'gem-c-step-nav__circle-inner') do
                    tag.span(class: 'gem-c-step-nav__circle-background') do
                      concat(tag.span('Step', class: 'govuk-visually-hidden'))
                      concat(logic || index)
                    end
                  end
                end)
                concat(tag.span(class: 'js-step-title') do
                  tag.span(text, class: 'js-step-title-text')
                end)
              end
            end
          end

          # rubocop:enable Metrics/AbcSize
        end
      end
    end
  end
end