module Workarea
  decorate Order::Item, with: :gift_wrapping do
    decorated do
      field :gift_wrap_quantities, type: Hash, default: {}
      field :gift_wraps_attributes, type: Array, default: []
    end

    def allow_gift_wrapping?
      !!product_attributes.with_indifferent_access[:allow_gift_wrapping]
    end

    # Adjusts gift_wrap_quantities whenever quantity changes
    # NOTE: this would need to be modified when supporting multiple gift
    # wrap options across the quantity of a single item.
    #
    # @param [Integer] quantity the new quantity
    #
    # @return [Integer]
    #
    def quantity=(quantity)
      super.tap do
        return unless quantity_changed? && gift_wrap_quantities.present?

        gift_wrap_quantities.each_key do |sku|
          gift_wrap_quantities[sku] = quantity
        end
      end
    end

    def gift_wrap_skus
      gift_wrap_quantities.keys
    end

    def reset_gift_wrapping
      self.gift_wrap_quantities = {}
      self.gift_wraps_attributes = []
    end

    def add_gift_wrap(attributes, qty = nil)
      sku = attributes['sku']

      gift_wrap_quantities[sku] ||= 0
      gift_wrap_quantities[sku] += (qty || quantity).to_i

      if gift_wrap_quantities[sku] > quantity
        gift_wrap_quantities[sku] = quantity
      end

      gift_wraps_attributes << attributes
      gift_wraps_attributes.uniq! { |a| a['_id'] }
    end
  end
end