class Public::Api::V1::PortalsController < Public::Api::V1::Portals::BaseController
  before_action :ensure_custom_domain_request, only: [:show]
  before_action :redirect_to_portal_with_locale, only: [:show]
  before_action :portal
  before_action :set_portal_layout
  before_action :set_view_variant
  before_action :ensure_portal_feature_enabled
  before_action :load_home_data, only: [:show], if: -> { @portal_layout == 'documentation' }
  layout 'portal'

  def show
    @og_image_url = helpers.set_og_image_url('', @portal.header_text)
  end

  def sitemap
    @help_center_url = @portal.custom_domain || ChatwootApp.help_center_root
    # if help_center_url does not contain a protocol, prepend it with https
    @help_center_url = "https://#{@help_center_url}" unless @help_center_url.include?('://')
  end

  private

  def portal
    @portal ||= Portal.find_by!(slug: params[:slug], archived: false)
    @locale = params[:locale] || @portal.default_locale
  end

  def redirect_to_portal_with_locale
    return if params[:locale].present?

    portal
    redirect_to "/hc/#{@portal.slug}/#{@portal.default_locale}"
  end

  def load_home_data
    base_articles = @portal.articles.published.where(locale: @locale).includes(:author, :category)
    @visible_categories = @portal.categories
                                 .where(locale: @locale)
                                 .joins(:articles).where(articles: { status: :published })
                                 .order(position: :asc)
                                 .group('categories.id')
    @popular_topics = @visible_categories.first(3)
    @featured = base_articles.order_by_views.limit(6)
    @category_contributors = build_category_contributors(@visible_categories)
  end

  def build_category_contributors(categories)
    category_ids = categories.map(&:id)
    return {} if category_ids.empty?

    @portal.articles
           .published
           .where(locale: @locale, category_id: category_ids)
           .includes(:author)
           .group_by(&:category_id)
           .transform_values { |articles| articles.filter_map(&:author).uniq.first(3) }
  end
end