class AddSecondaryAzToVpc

# File migrations/20130827000001_add_secondary_az_to_vpc.rb, line 4
def execute
  vpc_receipt = load_receipt("aws_vpc_receipt")

  vpc = Bosh::AwsCliPlugin::VPC.find(ec2, vpc_receipt["vpc"]["id"])

  new_az = vpc_receipt["original_configuration"]["vpc"]["subnets"]["cf_elb2"]["availability_zone"]

  subnets = {
    "bosh2" => {"availability_zone" => new_az, "cidr" => "10.10.64.0/24", "default_route" => "igw"},
    "cf2" => {"availability_zone" => new_az, "cidr" => "10.10.80.0/20", "default_route" => "cf_nat_box1"},
    "services2" => {"availability_zone" => new_az, "cidr" => "10.10.96.0/20", "default_route" => "cf_nat_box1"},
  }

  existing_subnets = vpc.subnets

  subnets.reject! { |subnet, _|
    existing_subnets.include?(subnet).tap do |should_skip|
      say "  Skipping already-present subnet #{subnet.inspect}" if should_skip
    end
  }


  vpc.create_subnets(subnets) { |msg| say "  #{msg}" }
  vpc.create_nat_instances(subnets)
  vpc.setup_subnet_routes(subnets) { |msg| say "  #{msg}" }

  vpc_receipt["vpc"]["subnets"] = vpc.subnets
ensure
  save_receipt("aws_vpc_receipt", vpc_receipt)
end