if states[:payment]
  event :payment_failed do
    transition to: :payment, from: :confirm
  end

  after_transition to: :complete, do: :persist_user_credit_card # no
  before_transition to: :payment, do: :set_shipments_cost # no
  before_transition to: :payment, do: :create_tax_charge! # yes
  before_transition to: :payment, do: :assign_default_credit_card # no

  before_transition to: :confirm, do: :add_store_credit_payments # yes

  # see also process_payments_before_complete below which needs to
  # be added in the correct sequence.
end

before_transition from: :cart, do: :ensure_line_items_present # no

if states[:address]
  before_transition from: :address, do: :create_tax_charge! # yes
  before_transition to: :address, do: :assign_default_addresses! # no
  before_transition from: :address, do: :persist_user_address! # no
end

if states[:delivery]
  before_transition to: :delivery, do: :ensure_shipping_address # no
  before_transition to: :delivery, do: :create_proposed_shipments, unless: :unreturned_exchange? #no
  before_transition to: :delivery, do: :ensure_available_shipping_rates # no
  before_transition to: :delivery, do: :set_shipments_cost # yes
  before_transition from: :delivery, do: :apply_free_shipping_promotions # no
end

before_transition to: :resumed, do: :ensure_line_item_variants_are_not_deleted
before_transition to: :resumed, do: :validate_line_item_availability

# Sequence of before_transition to: :complete
# calls matter so that we do not process payments
# until validations have passed
before_transition to: :complete, do: :validate_line_item_availability, unless: :unreturned_exchange? #no
before_transition to: :complete, do: :ensure_available_shipping_rates # no
before_transition to: :complete, do: :ensure_promotions_eligible # no
before_transition to: :complete, do: :ensure_line_item_variants_are_not_deleted # no
before_transition to: :complete, do: :ensure_inventory_units, unless: :unreturned_exchange? #no
if states[:payment]
  before_transition to: :complete, do: :process_payments_before_complete # yes
end

after_transition to: :complete, do: :finalize! # yes
after_transition to: :resumed,  do: :after_resume
after_transition to: :canceled, do: :after_cancel

after_transition from: any - :cart, to: any - [:confirm, :complete] do |order|
  order.update_totals # yes
  order.persist_totals # yes
end