require_relative '../base'
require_relative 'footer/navigation'
require_relative 'footer/meta'

module CCS
  module Components
    module GovUK
      # = GOV.UK Footer
      #
      # This is used to generate the footer component from the
      # {https://design-system.service.gov.uk/components/footer GDS - Components - Footer}
      #
      # @!attribute [r] navigation
      #   @return [Array<Navigation>] An array of the initialised navigation sections
      # @!attribute [r] meta
      #   @return [Meta] The initialised meta section

      class Footer < Base
        private

        attr_reader :navigation, :meta

        public

        # @param navigation [Array<Hash>] an array of sections for the footer navigation.
        #                                 See {Components::GovUK::Footer::Navigation#initialize Navigation#initialize} for details of the items in the array.
        # @param meta [Hash] ptions for the meta section of the footer.
        #                    See {Components::GovUK::Footer::Meta#initialize Meta#initialize} for details of the options.
        # @param options [Hash] options that will be used in customising the HTML
        #
        # @option options [String] :classes additional CSS classes for the footer HTML
        # @option options [String] :container_class classes that can be added to the inner container
        # @option options [ActiveSupport::SafeBuffer,String] :content_licence The content licence information, see {CCS::Components::GovUK::Footer#footer_content_licence footer_content_licence} for default
        # @option options [ActiveSupport::SafeBuffer,String] :copyright The copyright information, (default: '© Crown copyright')
        # @option options [Hash] :attributes additional attributes that will added as part of the HTML

        def initialize(navigation: nil, meta: nil, **options)
          super(**options)

          @options[:attributes][:role] = 'contentinfo'
          @options[:copyright] ||= '© Crown copyright'

          @navigation = navigation&.map { |navigation_item| Navigation.new(context: @context, **navigation_item) }
          @meta = Meta.new(context: @context, **meta) if meta
        end

        # rubocop:disable Metrics/AbcSize

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

        def render
          tag.footer(**options[:attributes]) do
            tag.div(class: "govuk-width-container #{options[:container_classes]}".rstrip) do
              if navigation
                concat(tag.div(class: 'govuk-footer__navigation') do
                  navigation.each { |navigation_item| concat(navigation_item.render) }
                end)
                concat(tag.hr(class: 'govuk-footer__section-break'))
              end
              concat(tag.div(class: 'govuk-footer__meta') do
                concat(tag.div(class: 'govuk-footer__meta-item govuk-footer__meta-item--grow') do
                  concat(meta.render) if meta
                  concat(footer_logo)
                  concat(footer_content_licence)
                end)
                concat(footer_copyright)
              end)
            end
          end
        end

        # rubocop:enable Metrics/AbcSize

        # The default attributes for the breadcrumbs

        DEFAULT_ATTRIBUTES = { class: 'govuk-footer' }.freeze

        private

        # Generates the logo used in the footer
        #
        # @return [ActiveSupport::SafeBuffer]

        def footer_logo
          tag.svg(
            class: 'govuk-footer__licence-logo',
            aria: { hidden: 'true' },
            focusable: 'false',
            xmlns: 'http://www.w3.org/2000/svg',
            viewBox: '0 0 483.2 195.7',
            height: '17',
            width: '41'
          ) do
            tag.path(
              fill: 'currentColor',
              d: 'M421.5 142.8V.1l-50.7 32.3v161.1h112.4v-50.7zm-122.3-9.6A47.12 47.12 0 0 1 221 97.8c0-26 21.1-47.1 47.1-47.1 16.7 0 31.4 8.7 39.7 21.8l42.7-27.2A97.63 97.63 0 0 0 268.1 0c-36.5 0-68.3 20.1-85.1 49.7A98 98 0 0 0 97.8 0C43.9 0 0 43.9 0 97.8s43.9 97.8 97.8 97.8c36.5 0 68.3-20.1 85.1-49.7a97.76 97.76 0 0 0 149.6 25.4l19.4 22.2h3v-87.8h-80l24.3 27.5zM97.8 145c-26 0-47.1-21.1-47.1-47.1s21.1-47.1 47.1-47.1 47.2 21 47.2 47S123.8 145 97.8 145'
            )
          end
        end

        # Generates the content licence for the footer
        #
        # @return [ActiveSupport::SafeBuffer]

        def footer_content_licence
          tag.span(class: 'govuk-footer__licence-description') do
            if options[:content_licence]
              concat(options[:content_licence])
            else
              concat('All content is available under the')
              concat(link_to('Open Government Licence v3.0', 'https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/', class: 'govuk-footer__link', rel: 'license'))
              concat(', except where otherwise stated')
            end
          end
        end

        # Generates the copyright used in the footer
        #
        # @return [ActiveSupport::SafeBuffer]

        def footer_copyright
          tag.div(class: 'govuk-footer__meta-item') do
            link_to(options[:copyright], 'https://www.nationalarchives.gov.uk/information-management/re-using-public-sector-information/uk-government-licensing-framework/crown-copyright/', class: 'govuk-footer__link govuk-footer__copyright-logo')
          end
        end
      end
    end
  end
end