require 'lib/executors/stack_executor'

class StackBootstrapWorker < Worker

  # @options:
  #   'stack_attributes', required
  #   'without_bootstrap', optional. false by default
  #   'skip_rollback', optional. false by default
  def perform(options)
    call do
      puts_and_flush JSON.pretty_generate(options)
      stack_attrs = options.fetch('stack_attributes')
      without_bootstrap = options['without_bootstrap'] || false
      skip_rollback = options['skip_rollback'] || false

      save_report(stack_attrs)

      create_stack(stack_attrs)
      if !executor.wait_till_stack_is_created
        puts_and_flush "Stack creating error"
        return 1
      end

      begin
        executor.persist_new_servers
        if without_bootstrap
          puts_and_flush "\n\nBootstrap has been skipped. Stack has been successfully created."
          0
        else
          bootstrap_or_rollback_if_failed(skip_rollback: skip_rollback)
        end
      rescue StandardError => e
        puts_and_flush "\nAn error occured."
        rollback_stack! unless skip_rollback
        raise e
      end
    end
  end

  private

  def executor
    @executor ||= Devops::Executor::StackExecutor.new(out: out)
  end

  # let it stay inside method to improve readability of #perform method
  def create_stack(stack_attrs)
    @stack = executor.create_stack(stack_attrs)
  end

  def bootstrap_or_rollback_if_failed(options)
    bootstrap_result = executor.bootstrap_just_persisted(jid)
    puts_and_flush Devops::Messages.t("worker.stack_bootstrap.bootstrap_result.#{bootstrap_result.reason}")
    if bootstrap_result.bootstrap_error? && !options[:skip_rollback]
      rollback_stack!
    end
    bootstrap_result.code
  end


  def rollback_stack!
    puts_and_flush "\nStart rollback of a stack"
    executor.delete_stack
    puts_and_flush "Stack rollback has been completed"
  end

  def save_report(stack_attrs)
    update_report(
      "created_by" => stack_attrs['owner'],
      "project" => stack_attrs["project"],
      "deploy_env" => stack_attrs["deploy_env"],
      "type" => ::Devops::Model::Report::STACK_TYPE,
      "subreports" => [],
      "stack" => stack_attrs['name']
    )
  end
end