require "db/mongo/models/stack/stack_factory"
require "db/mongo/models/project"
require "workers/stack_bootstrap/stack_synchronizer"
require "workers/stack_bootstrap/servers_bootstrapper"
require "workers/stack_bootstrap/stack_servers_persister"

class StackBootstrapWorker < Worker

  # options must contain 'stack_attributes'
  def perform(options)
    call do
      stack_attrs = options.fetch('stack_attributes')

      without_bootstrap = stack_attrs.delete('without_bootstrap')
      @out.puts "Received 'without_bootstrap' option" if without_bootstrap

      save_report(stack_attrs)

      @stack = create_stack(stack_attrs)
      if !sync_stack
        puts_and_flush "Stack creating error"
        return 1
      end

      begin
        @servers_by_priorities = persist_stack_servers
        return 0 if without_bootstrap

        bootstrap_result = bootstrap_servers_by_priority
        puts_and_flush Devops::Messages.t("worker.stack_bootstrap.bootstrap_result.#{bootstrap_result.reason}")
        rollback_stack!(@stack) if bootstrap_result.bootstrap_error?
        bootstrap_result.code
      rescue StandardError => e
        puts_and_flush "\nAn error occured."
        rollback_stack!(@stack)
        raise e
      end
    end
  end

  private

  def persist_stack_servers
    StackServersPersister.new(@stack, out).persist
  end

  def bootstrap_servers_by_priority
    PrioritizedGroupsBootstrapper.new(out, jid, @servers_by_priorities).bootstrap_servers_by_priority
  end

  # builds and persist stack model, initiate stack creating in cloud
  def create_stack(stack_attrs)
    stack = Devops::Model::StackFactory.create(stack_attrs["provider"], stack_attrs, @out)
    mongo.stack_insert(stack)
  end

  def sync_stack
    sync_result = StackSynchronizer.new(@stack, out).sync

    if sync_result.ok?
      puts_and_flush "\nStack '#{@stack.name}' has been created"
      true
    else
      puts_and_flush "An error ocurred during stack synchronization: #{sync_result.reason}"
      false
    end
  end

  def rollback_stack!(stack)
    puts_and_flush "\nStart rollback of a stack"
    begin
      stack.delete_stack_in_cloud!
      Devops::Db.connector.stack_servers_delete(stack.name)
      Devops::Db.connector.stack_delete(stack.id)
      puts_and_flush "Stack rollback has been completed"
    rescue StandardError, Sinatra::NotFound # Sinatra::NotFound often raised in tests
      puts_and_flush "Stack rollback failed"
    end
  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