# frozen_string_literal: true

CurrentZoneLoader.module_eval do
  extend ActiveSupport::Concern

  def current_zone
    return @current_zone if defined?(@current_zone)

    @current_zone = if (session_region_name = session['region']&.[]('name'))
                      Spree::Zones::Product.find_by(name: session_region_name)
                    elsif request_iso_code.present?
                      @current_zone = flow_zone
                      @current_zone ||= Spree::Country.find_by(iso: request_iso_code)&.product_zones&.active&.first
                    end

    @current_zone ||= Spree::Zones::Product.find_by(name: 'International') ||
                      Spree::Zones::Product.new(name: 'International', taxon_ids: [], currencies: %w[USD CAD])

    current_zone_name = @current_zone.name
    session['region'] = { name: current_zone_name, available_currencies: @current_zone.available_currencies,
                          request_iso_code: request_iso_code }

    RequestStore.store[:session] = session
    Rails.logger.debug("Using product zone: #{current_zone_name}")
    @current_zone
  end

  def flow_zone # rubocop:disable Metrics/AbcSize
    return unless Spree::Zones::Product.active
                                       .where("meta -> 'flow_data' ->> 'country' = ?",
                                              ISO3166::Country[request_iso_code]&.alpha3).exists?

    request_ip = if Rails.env.production?
                   request.ip
                 else
                   Spree::Config[:debug_request_ip_address] || request.ip
                   # Germany ip: 85.214.132.117, Sweden ip: 62.20.0.196, Moldova ip: 89.41.76.29
                 end
    flow_io_session = FlowcommerceSpree::Session.create(ip: request_ip, visitor: visitor_id_for_flow_io)
    # :create method will issue a request to flow.io. The experience, contained in the
    # response, will be available in the session object - flow_io_session.experience

    if (zone = Spree::Zones::Product.active.find_by(name: flow_io_session.experience&.key&.titleize))
      session['_f60_session'] = flow_io_session.id
      session['_f60_expires_at'] = flow_io_session.expires_at.to_s
    end

    zone
  end

  # composes an unique visitor id for FlowcommerceSpree::Session model
  def visitor_id_for_flow_io
    guest_token = cookies.signed[:guest_token]
    uid = if guest_token
            Digest::SHA1.hexdigest(guest_token)
          else
            session_id = session[:session_id]
            session_id ? Digest::SHA1.hexdigest(session_id) : Digest::SHA1.hexdigest(request.ip + request.user_agent)
          end

    "session-#{uid}"
  end
end