require_relative '../base'
require_relative 'header/navigation'

module CCS::Components
  module GovUK
    # = GOV.UK Header
    #
    # This is used to generate the header component from the
    # {https://design-system.service.gov.uk/components/header GDS - Components - Header}
    #
    # @!attribute [r] navigation
    #   @return [Navigation] The initialised navigation section
    # @!attribute [r] service
    #   @return [Hash] The options for the service section

    class Header < Base
      private

      attr_reader :navigation, :service

      public

      # @param navigation [Hash] options for the navigation section of the header.
      #                          See {Components::GovUK::Header::Navigation#initialize Navigation#initialize} for details of the options.
      # @param menu_button [Hash] options for the menu button in the header.
      #                           See {Components::GovUK::Header::Navigation#initialize Navigation#initialize} for details of the options.
      # @param service [Hash] options for the service name
      # @param options [Hash] options that will be used in customising the HTML
      #
      # @option service [String] :name the name of the service, included in the header
      # @option service [String] :href URL for the service name anchor
      #
      # @option options [String] :classes additional CSS classes for the header HTML
      # @option options [String] :container_classes classes for the container
      # @option options [String] :homepage_url URL of the homepage. Defaults to +/+
      # @option options [String] :product_name product name, used when the product name follows on directly from ‘GOV.UK
      # @option options [Hash] :attributes additional attributes that will added as part of the header HTML

      def initialize(navigation: nil, menu_button: nil, service: nil, **options)
        super(**options)

        @options[:attributes][:role] = 'banner'
        @options[:container_classes] ||= 'govuk-width-container'
        @options[:homepage_url] ||= '/'

        @navigation = Navigation.new(navigation: navigation, menu_button: menu_button, context: @context) if navigation
        @service = service
      end

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

      def render
        tag.header(**options[:attributes]) do
          tag.div(class: "govuk-header__container #{options[:container_classes]}") do
            concat(header_logo)
            if service || navigation
              concat(tag.div(class: 'govuk-header__content') do
                concat(header_service_name) if service
                concat(navigation.render) if navigation
              end)
            end
          end
        end
      end

      # The default attributes for the breadcrumbs

      DEFAULT_ATTRIBUTES = { class: 'govuk-header', data: { module: 'govuk-header' } }.freeze

      private

      # Generates the logo for header
      #
      # @return [ActiveSupport::SafeBuffer]

      def header_logo
        tag.div(class: 'govuk-header__logo') do
          link_to(options[:homepage_url], class: 'govuk-header__link govuk-header__link--homepage') do
            concat(tag.span(class: 'govuk-header__logotype') do
              concat(tag.svg(class: 'govuk-header__logotype-crown', xmlns: 'http://www.w3.org/2000/svg', height: '30', width: '36', aria: { hidden: 'true' }, focusable: 'false', viewBox: '0 0 132 97') do
                tag.path(fill: 'currentColor', 'fill-rule': 'evenodd', d: 'M25 30.2c3.5 1.5 7.7-.2 9.1-3.7 1.5-3.6-.2-7.8-3.9-9.2-3.6-1.4-7.6.3-9.1 3.9-1.4 3.5.3 7.5 3.9 9zM9 39.5c3.6 1.5 7.8-.2 9.2-3.7 1.5-3.6-.2-7.8-3.9-9.1-3.6-1.5-7.6.2-9.1 3.8-1.4 3.5.3 7.5 3.8 9zM4.4 57.2c3.5 1.5 7.7-.2 9.1-3.8 1.5-3.6-.2-7.7-3.9-9.1-3.5-1.5-7.6.3-9.1 3.8-1.4 3.5.3 7.6 3.9 9.1zm38.3-21.4c3.5 1.5 7.7-.2 9.1-3.8 1.5-3.6-.2-7.7-3.9-9.1-3.6-1.5-7.6.3-9.1 3.8-1.3 3.6.4 7.7 3.9 9.1zm64.4-5.6c-3.6 1.5-7.8-.2-9.1-3.7-1.5-3.6.2-7.8 3.8-9.2 3.6-1.4 7.7.3 9.2 3.9 1.3 3.5-.4 7.5-3.9 9zm15.9 9.3c-3.6 1.5-7.7-.2-9.1-3.7-1.5-3.6.2-7.8 3.7-9.1 3.6-1.5 7.7.2 9.2 3.8 1.5 3.5-.3 7.5-3.8 9zm4.7 17.7c-3.6 1.5-7.8-.2-9.2-3.8-1.5-3.6.2-7.7 3.9-9.1 3.6-1.5 7.7.3 9.2 3.8 1.3 3.5-.4 7.6-3.9 9.1zM89.3 35.8c-3.6 1.5-7.8-.2-9.2-3.8-1.4-3.6.2-7.7 3.9-9.1 3.6-1.5 7.7.3 9.2 3.8 1.4 3.6-.3 7.7-3.9 9.1zM69.7 17.7l8.9 4.7V9.3l-8.9 2.8c-.2-.3-.5-.6-.9-.9L72.4 0H59.6l3.5 11.2c-.3.3-.6.5-.9.9l-8.8-2.8v13.1l8.8-4.7c.3.3.6.7.9.9l-5 15.4v.1c-.2.8-.4 1.6-.4 2.4 0 4.1 3.1 7.5 7 8.1h.2c.3 0 .7.1 1 .1.4 0 .7 0 1-.1h.2c4-.6 7.1-4.1 7.1-8.1 0-.8-.1-1.7-.4-2.4V34l-5.1-15.4c.4-.2.7-.6 1-.9zM66 92.8c16.9 0 32.8 1.1 47.1 3.2 4-16.9 8.9-26.7 14-33.5l-9.6-3.4c1 4.9 1.1 7.2 0 10.2-1.5-1.4-3-4.3-4.2-8.7L108.6 76c2.8-2 5-3.2 7.5-3.3-4.4 9.4-10 11.9-13.6 11.2-4.3-.8-6.3-4.6-5.6-7.9 1-4.7 5.7-5.9 8-.5 4.3-8.7-3-11.4-7.6-8.8 7.1-7.2 7.9-13.5 2.1-21.1-8 6.1-8.1 12.3-4.5 20.8-4.7-5.4-12.1-2.5-9.5 6.2 3.4-5.2 7.9-2 7.2 3.1-.6 4.3-6.4 7.8-13.5 7.2-10.3-.9-10.9-8-11.2-13.8 2.5-.5 7.1 1.8 11 7.3L80.2 60c-4.1 4.4-8 5.3-12.3 5.4 1.4-4.4 8-11.6 8-11.6H55.5s6.4 7.2 7.9 11.6c-4.2-.1-8-1-12.3-5.4l1.4 16.4c3.9-5.5 8.5-7.7 10.9-7.3-.3 5.8-.9 12.8-11.1 13.8-7.2.6-12.9-2.9-13.5-7.2-.7-5 3.8-8.3 7.1-3.1 2.7-8.7-4.6-11.6-9.4-6.2 3.7-8.5 3.6-14.7-4.6-20.8-5.8 7.6-5 13.9 2.2 21.1-4.7-2.6-11.9.1-7.7 8.8 2.3-5.5 7.1-4.2 8.1.5.7 3.3-1.3 7.1-5.7 7.9-3.5.7-9-1.8-13.5-11.2 2.5.1 4.7 1.3 7.5 3.3l-4.7-15.4c-1.2 4.4-2.7 7.2-4.3 8.7-1.1-3-.9-5.3 0-10.2l-9.5 3.4c5 6.9 9.9 16.7 14 33.5 14.8-2.1 30.8-3.2 47.7-3.2z')
              end)
              concat(tag.span('GOV.UK', class: 'govuk-header__logotype-text'))
            end)
            concat(tag.span(options[:product_name], class: 'govuk-header__product-name')) if options[:product_name]
          end
        end
      end

      # Generates the service name section
      #
      # @return [ActiveSupport::SafeBuffer]

      def header_service_name
        if service[:href]
          link_to(service[:name], service[:href], class: 'govuk-header__link govuk-header__service-name')
        else
          tag.span(service[:name], class: 'govuk-header__service-name')
        end
      end
    end
  end
end