class DataUpdateScript < ApplicationRecord
  DIRECTORY = Rails.root.join("lib/data_update_scripts").freeze
  NAMESPACE = "DataUpdateScripts".freeze
  STATUSES = { enqueued: 0, working: 1, succeeded: 2, failed: 3 }.freeze

  enum status: STATUSES
  validates :file_name, uniqueness: true

  def self.filenames
    Dir.glob("*.rb", base: DIRECTORY).map { |f| Pathname.new(f).basename(".rb").to_s }
  end

  def self.load_script_ids
    filenames.
      map { |file_name| find_or_create_by(file_name: file_name) }.
      select(&:enqueued?).
      map(&:id)
  end

  def mark_as_run!
    update!(run_at: Time.now.utc, status: :working)
  end

  def mark_as_finished!
    update!(finished_at: Time.now.utc, status: :succeeded)
  end

  def mark_as_failed!
    update!(finished_at: Time.now.utc, status: :failed)
  end

  def file_class
    "#{self.class::NAMESPACE}::#{file_name.camelcase}".constantize
  end
end