<%
  local_assigns[:margin_bottom] ||= 6
  shared_helper = GovukPublishingComponents::Presenters::SharedHelper.new(local_assigns)

  id ||= "default-id-#{SecureRandom.hex(4)}"
  items ||= []
  anchor_navigation ||= false
  track_show_all_clicks ||= false
  track_sections ||= false

  accordion_classes = %w(gem-c-accordion govuk-accordion)
  accordion_classes << (shared_helper.get_margin_bottom)

  translations = {
    show_text: "components.accordion.show",
    hide_text: "components.accordion.hide",
    show_all_text: "components.accordion.show_all",
    hide_all_text: "components.accordion.hide_all",
    this_section_visually_hidden: "components.accordion.this_section_visually_hidden",
  }

  locales = {}

  data_attributes ||= {}
  ((data_attributes[:module] ||= "") << " " << "govuk-accordion gem-accordion").strip!
  data_attributes[:anchor_navigation] = anchor_navigation
  data_attributes[:track_show_all_clicks] = track_show_all_clicks
  data_attributes[:track_sections] = track_sections

  data_attributes_show_all ||= nil
  data_attributes[:show_all_attributes] = data_attributes_show_all if data_attributes_show_all

  translations.each do |key, translation|
    locales[key] = shared_helper.t_locale(translation)
    data_attributes[key] = t(translation)
  end

  unique_locales = locales.values.uniq

  if unique_locales.length > 1
    data_attributes[:locale] = locales
  else
    if unique_locales[0] != I18n.locale
      data_attributes[:locale] = unique_locales[0]
    end
  end

%>
<% if items.any? %>
  <%= tag.div(class: accordion_classes, id: id, data: data_attributes) do %>
    <% items.each_with_index do |item, i| %>
      <%
        # The GOVUK Frontend JavaScript for this component
        # uses a loop starting at 1 for accessing heading ID values,
        # hence the increment below
        index = i + 1

        item[:data_attributes] ||= nil

        section_classes = %w(govuk-accordion__section)
        section_classes << 'govuk-accordion__section--expanded' if item[:expanded]

        summary_classes = %w(govuk-accordion__section-summary govuk-body)
      %>
      <%= tag.div(class: section_classes) do %>
        <%= tag.div(class: "govuk-accordion__section-header") do %>
          <%=
            content_tag(
              shared_helper.get_heading_level,
              content_tag(
                'span',
                item[:heading][:text],
                class: "govuk-accordion__section-button",
                id: "#{id}-heading-#{index}"
              ),
              class: "govuk-accordion__section-heading",
              id: item[:heading][:id],
              data: item[:data_attributes]
            )
          %>
          <%= tag.div(item[:summary][:text], id: "#{id}-summary-#{index}", class: summary_classes) if item[:summary].present? %>
        <% end %>
        <%= tag.div(item[:content][:html], id: "#{id}-content-#{index}", class: "govuk-accordion__section-content", 'aria-labelledby': "#{id}-heading-#{index}") %>
      <% end %>
    <% end %>
  <% end %>
<% end %>