## Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
## SPDX-License-Identifier: MIT-0

AWSTemplateFormatVersion: '2010-09-09'

Description: 'Cloudformation Template to create a VPC with 2 public subnets in 2 AZs needed for Metrics & Analytics Solution.'

Metadata:
  'AWS::CloudFormation::Interface':
    ParameterGroups:
    - Label:
        default: 'VPC Parameters'
      Parameters:
      - ClassB
    ParameterLabels:
      ClassB:
        default: ClassB 2nd Octet
        
Parameters:
  ClassB:
    Description: 'Specify the 2nd Octet of IPv4 CIDR block for the VPC (10.XXX.0.0/16) in the range [0-255]'
    Type: Number
    Default: 0
    ConstraintDescription: 'Must be in the range [0-255]'
    MinValue: 0
    MaxValue: 255

Resources:
  VPC:
    Type: 'AWS::EC2::VPC'
    Properties:
      CidrBlock: !Sub '10.${ClassB}.0.0/16'
      EnableDnsSupport: true
      EnableDnsHostnames: true
      InstanceTenancy: default
      Tags:
      - Key: Name
        Value: !Sub '${AWS::StackName}-VPC'
        
  InternetGateway:
    Type: 'AWS::EC2::InternetGateway'
    Properties:
      Tags:
      - Key: Name
        Value: !Sub '10.${ClassB}.0.0/16'
        
  VPCGatewayAttachment:
    Type: 'AWS::EC2::VPCGatewayAttachment'
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway
 
  NATEIPA:
    DependsOn: VPCGatewayAttachment
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc  
      
  NATEIPB:
    DependsOn: VPCGatewayAttachment
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc  
     
  SubnetAPublic:
    Type: 'AWS::EC2::Subnet'
    Properties:
      AvailabilityZone: !Select [0, !GetAZs '']
      CidrBlock: !Sub '10.${ClassB}.0.0/20'
      MapPublicIpOnLaunch: true
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join
                 - '_'
                 - - 'Metrics-Analytics'
                   - !Select [0, !GetAZs '']
                   - 'Public'
      - Key: Reach
        Value: public
        
  SubnetBPublic:
    Type: 'AWS::EC2::Subnet'
    Properties:
      AvailabilityZone: !Select [1, !GetAZs '']
      CidrBlock: !Sub '10.${ClassB}.16.0/20'
      MapPublicIpOnLaunch: true
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join
                 - '_'
                 - - 'Metrics-Analytics'
                   - !Select [1, !GetAZs '']
                   - 'Public'        
      - Key: Reach
        Value: public
        
  RouteTablePublic:
    Type: 'AWS::EC2::RouteTable'
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join
                 - '_'
                 - - !Sub '10.${ClassB}.0.0/16'
                   - 'Public'

  RouteTableAssociationAPublic:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref SubnetAPublic
      RouteTableId: !Ref RouteTablePublic
      
  RouteTableAssociationBPublic:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref SubnetBPublic
      RouteTableId: !Ref RouteTablePublic
      
  RouteTablePublicInternetRoute:
    Type: 'AWS::EC2::Route'
    DependsOn: VPCGatewayAttachment
    Properties:
      RouteTableId: !Ref RouteTablePublic
      DestinationCidrBlock: '0.0.0.0/0'
      GatewayId: !Ref InternetGateway

  NetworkAclPublic:
    Type: 'AWS::EC2::NetworkAcl'
    Properties:
      VpcId: !Ref VPC
      Tags:
      - Key: Name
        Value: !Join
                 - '_'
                 - - !Sub '10.${ClassB}.0.0/16'
                   - 'NACL'
                   - 'Public'

  SubnetNetworkAclAssociationAPublic:
    Type: 'AWS::EC2::SubnetNetworkAclAssociation'
    Properties:
      SubnetId: !Ref SubnetAPublic
      NetworkAclId: !Ref NetworkAclPublic
      
  SubnetNetworkAclAssociationBPublic:
    Type: 'AWS::EC2::SubnetNetworkAclAssociation'
    Properties:
      SubnetId: !Ref SubnetBPublic
      NetworkAclId: !Ref NetworkAclPublic
      
  NetworkAclEntryInPublicAllowAll:
    Type: 'AWS::EC2::NetworkAclEntry'
    Properties:
      NetworkAclId: !Ref NetworkAclPublic
      RuleNumber: 99
      Protocol: -1
      RuleAction: allow
      Egress: false
      CidrBlock: '0.0.0.0/0'
      
  NetworkAclEntryOutPublicAllowAll:
    Type: 'AWS::EC2::NetworkAclEntry'
    Properties:
      NetworkAclId: !Ref NetworkAclPublic
      RuleNumber: 99
      Protocol: -1
      RuleAction: allow
      Egress: true
      CidrBlock: '0.0.0.0/0'
      
     
Outputs:
  TemplateID:
    Description: 'Template ID'
    Value: 'VPC-3AZs'
    
  StackName:
    Description: 'Stack name'
    Value: !Sub '${AWS::StackName}'

  VPC:
    Description: 'VPC'
    Value: !Ref VPC
    Export:
      Name: !Sub '${AWS::StackName}-VPC'
      
  ClassB:
    Description: 'Class B'
    Value: !Ref ClassB
    Export:
      Name: !Sub '${AWS::StackName}-ClassB'
      
  CidrBlock:
    Description: 'The set of IP addresses for the VPC'
    Value: !GetAtt 'VPC.CidrBlock'
    Export:
      Name: !Sub '${AWS::StackName}-CidrBlock'
    
  AZs:
    Description: 'AZs'
    Value: 2
    Export:
      Name: !Sub '${AWS::StackName}-AZs'
      
  AZA:
    Description: 'AZ of A'
    Value: !Select [0, !GetAZs '']
    Export:
      Name: !Sub '${AWS::StackName}-AZA'
      
  AZB:
    Description: 'AZ of B'
    Value: !Select [1, !GetAZs '']
    Export:
      Name: !Sub '${AWS::StackName}-AZB'
      
  SubnetsPublic:
    Description: 'Subnets public'
    Value: !Join [',', [!Ref SubnetAPublic, !Ref SubnetBPublic]]
    Export:
      Name: !Sub '${AWS::StackName}-SubnetsPublic'
      
  RouteTablesPublic:
    Description: 'Route tables public'
    Value: !Ref RouteTablePublic
    Export:
      Name: !Sub '${AWS::StackName}-RouteTablePublic'
      
  SubnetAPublic:
    Description: 'Subnet A public'
    Value: !Ref SubnetAPublic
    Export:
      Name: !Sub '${AWS::StackName}-SubnetAPublic'
      
  SubnetBPublic:
    Description: 'Subnet B public'
    Value: !Ref SubnetBPublic
    Export:
      Name: !Sub '${AWS::StackName}-SubnetBPublic'