# Copyright 2016-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# 
# Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at
# 
# http://aws.amazon.com/apache2.0/
# 
# or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Description: Creates a VPC and 3 subnets with automatically assigned CIDR ranges. Outputs the calculated ranged.

Resources:
  # Create a new VPC for the example
  Vpc:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 192.168.0.0/23

  # Call the custom resource, specify 3 subnets of different sizes.
  # The resource will have a property called CidrBlocks with an array of 3 CIDR block definitions
  CidrFindr:
    Type: Custom::CidrFindr
    Properties:
      ServiceToken: !ImportValue CidrFindr
      VpcId: !Ref Vpc  # Refer to the VPC created above
      Sizes: [24, 25, 26]  # 3 subnets of differing sizes

  Subnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref Vpc
      CidrBlock: !GetAtt CidrFindr.CidrBlock1
      
  Subnet2:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref Vpc
      CidrBlock: !GetAtt CidrFindr.CidrBlock2
      
  Subnet3:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref Vpc
      CidrBlock: !GetAtt CidrFindr.CidrBlock3

Outputs:
  Subnet1Cidr:
    Description: Subnet 1 CIDR Block
    Value: !GetAtt CidrFindr.CidrBlock1
  Subnet2Cidr:
    Description: Subnet 2 CIDR Block
    Value: !GetAtt CidrFindr.CidrBlock2
  Subnet3Cidr:
    Description: Subnet 3 CIDR Block
    Value: !GetAtt CidrFindr.CidrBlock3