# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/

class Sequencer
  class Unit
    module Import
      module Freshdesk
        module Ticket
          class Mapping < Sequencer::Unit::Base
            include ::Sequencer::Unit::Import::Common::Mapping::Mixin::ProvideMapped

            uses :resource, :id_map

            # Since the imports rely on a fresh Zammad installation, we
            #   can require the default priority and state names to be present.
            def priority_map
              @priority_map ||= {
                1 => ::Ticket::Priority.find_by(name: '1 low')&.id, # low
                2 => ::Ticket::Priority.find_by(name: '2 normal')&.id, # medium
                3 => ::Ticket::Priority.find_by(name: '3 high')&.id, # high
                4 => ::Ticket::Priority.find_by(name: '3 high')&.id, # urgent
              }.freeze
            end

            def state_map
              @state_map ||= {
                2 => ::Ticket::State.find_by(name: 'open')&.id, # open
                3 => ::Ticket::State.find_by(name: 'open')&.id, # pending
                4 => ::Ticket::State.find_by(name: 'closed')&.id, # resolved
                5 => ::Ticket::State.find_by(name: 'closed')&.id, # closed
              }.freeze
            end

            def process # rubocop:disable Metrics/AbcSize
              provide_mapped do
                {
                  title:       resource['subject'],
                  number:      resource['id'],
                  group_id:    group_id,
                  priority_id: priority_map[resource['priority']],
                  state_id:    state_map[resource['status']],
                  owner_id:    owner_id,
                  customer_id: customer_id,
                  created_at:  resource['created_at'],
                  updated_at:  resource['updated_at'],
                }
              end
            end

            private

            def group_id
              id_map.dig('Group', resource['group_id']) || ::Group.find_by(name: 'Support')&.id || 1
            end

            def customer_id
              id_map['User'][resource['requester_id']]
            end

            def owner_id
              id_map['User'][resource['responder_id']]
            end
          end
        end
      end
    end
  end
end