Description:  Add Route into Route Table for Transit Gateway

Parameters:
  # TGW ID
  TransitGatewayId:
    Type: String
  # Shared VPC Subnet ID
  VPC1PublicRouteTable1: 
    Type: String
  VPC1PublicRouteTable2: 
    Type: String
  VPC1PrivateRouteTable1: 
    Type: String
  VPC1PrivateRouteTable2: 
    Type: String
  # Application VPC Subnet ID
  VPC2PrivateRouteTable1: 
    Type: String
  VPC2PrivateRouteTable2: 
    Type: String
  VPC3PrivateRouteTable1: 
    Type: String
  VPC3PrivateRouteTable2: 
    Type: String
  VPC4PrivateRouteTable1: 
    Type: String
  VPC4PrivateRouteTable2: 
    Type: String
  # VPC CIDR
  VPC1CIDR:
    Type: String
  VPC2CIDR:
    Type: String
  VPC3CIDR:
    Type: String
  VPC4CIDR:
    Type: String

Resources:
  # Shared VPC - Private Route table
  # AZ1
  VPC1TGWPublicRoute21:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable1
       DestinationCidrBlock: !Ref VPC2CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPublicRoute31:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable1
       DestinationCidrBlock: !Ref VPC3CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPublicRoute41:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable1
       DestinationCidrBlock: !Ref VPC4CIDR
       TransitGatewayId: !Ref TransitGatewayId
  # AZ2
  VPC1TGWPublicRoute22:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable2
       DestinationCidrBlock: !Ref VPC2CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPublicRoute32:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable2
       DestinationCidrBlock: !Ref VPC3CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPublicRoute42:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PublicRouteTable2
       DestinationCidrBlock: !Ref VPC4CIDR
       TransitGatewayId: !Ref TransitGatewayId

  # Shared VPC - Private Route table
  # AZ1
  VPC1TGWPrivateRoute21:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC2CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPrivateRoute31:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC3CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPrivateRoute41:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC4CIDR
       TransitGatewayId: !Ref TransitGatewayId
  # AZ2
  VPC1TGWPrivateRoute22:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC2CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPrivateRoute32:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC3CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC1TGWPrivateRoute42:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC1PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC4CIDR
       TransitGatewayId: !Ref TransitGatewayId

  # VPC2 - Private Route table
  VPC2TGWRoute1:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC2PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC2TGWRoute2:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC2PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId
  
  # VPC3 - Private Route table
  VPC3TGWRoute1:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC3PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC3TGWRoute2:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC3PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId

  # VPC4 - Private Route table
  VPC4TGWRoute1:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC4PrivateRouteTable1
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId
  VPC4TGWRoute2:
    Type: AWS::EC2::Route
    Properties:
       RouteTableId: !Ref VPC4PrivateRouteTable2
       DestinationCidrBlock: !Ref VPC1CIDR
       TransitGatewayId: !Ref TransitGatewayId