sanger/sequencescape

# frozen_string_literal: true
# Use in migrations to deprecate request classes
# Usage:
# include RequestClassDeprecator
# deprecate_class('ClassName',options)
# options an otional hash
# {
# new_type: The new request type for affected requests. 'transfer' by default
# state_change: Hash of from_state => to_state applied to affected requests
# }
module RequestClassDeprecator
  class Request < ApplicationRecord
    self.table_name = 'requests'
  end

  def transfer_request
    RequestType.find_by!(key: 'transfer')
  end

  # rubocop:todo Metrics/MethodLength
  def deprecate_class(request_class_name, options = {}) # rubocop:todo Metrics/AbcSize
    state_changes = options.fetch(:state_change, {})
    new_request_type = options.fetch(:new_type, transfer_request)
    new_class_name = new_request_type.request_class_name

    ActiveRecord::Base.transaction do
      RequestType
        .where(request_class_name: request_class_name)
        .find_each do |rt|
          say "Deprecating: #{rt.name}"
          rt.update!(deprecated: true)

          rt_requests = Request.where(request_type_id: rt.id, sti_type: request_class_name)

          state_changes.each do |from_state, to_state|
            say "Moving #{rt.name} from #{from_state} to #{to_state}", true
            mig = rt_requests.where(state: from_state).update_all(state: to_state) # rubocop:disable Rails/SkipsModelValidations
            say "Moved: #{mig}", true
          end

          say 'Updating requests:'
          mig = rt_requests.update_all(sti_type: new_class_name, request_type_id: new_request_type.id) # rubocop:disable Rails/SkipsModelValidations
          say "Updated: #{mig}", true
          PlatePurpose::Relationship
            .where(transfer_request_type_id: rt.id)
            .update_all(transfer_request_type_id: new_request_type.id) # rubocop:disable Rails/SkipsModelValidations
        end
    end
  end
  # rubocop:enable Metrics/MethodLength
end