class JobLog < ApplicationRecord
  belongs_to :server, optional: true

  enum :status, { pending: 0, running: 1, completed: 2, failed: 3 }

  scope :recent, -> { order(created_at: :desc) }
  scope :for_server, ->(server_id) { where(server_id: server_id) }

  def duration
    return nil unless started_at && finished_at
    finished_at - started_at
  end

  def append_log(message)
    self.log_output ||= ""
    self.log_output += "[#{Time.current.strftime('%Y-%m-%d %H:%M:%S')}] #{message}\n"
    save
  end
end