---
AWSTemplateFormatVersion: 2010-09-09


Parameters:
  Name:
    Type: String

  VpcCIDR:
    Type: String

  Subnet1CIDR:
    Type: String

  Subnet2CIDR:
    Type: String

  Subnet3CIDR:
    Type: String

  Subnet4CIDR:
    Type: String


Resources:
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: !Ref VpcCIDR
      Tags:
        - Key: Name
          Value: !Ref Name

  InternetGateway:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
        - Key: Name
          Value: !Ref Name

  InternetGatewayAttachment:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      InternetGatewayId: !Ref InternetGateway
      VpcId: !Ref VPC

  Subnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 0, !GetAZs ]
      MapPublicIpOnLaunch: true
      CidrBlock: !Ref Subnet1CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Public)

  Subnet2:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 1, !GetAZs ]
      MapPublicIpOnLaunch: true
      CidrBlock: !Ref Subnet2CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Public)

  Subnet3:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 0, !GetAZs ]
      MapPublicIpOnLaunch: false
      CidrBlock: !Ref Subnet3CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Private)

  Subnet4:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 1, !GetAZs ]
      MapPublicIpOnLaunch: false
      CidrBlock: !Ref Subnet4CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Private)

  NAT1:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId:
        Fn::GetAtt:
        - EIP1
        - AllocationId
      SubnetId: !Ref Subnet1

  EIP1:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  Route1:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId:
        Ref: PrivateRouteTable1
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId:
        Ref: NAT1

  NAT2:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId:
        Fn::GetAtt:
        - EIP2
        - AllocationId
      SubnetId: !Ref Subnet2

  EIP2:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  Route2:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PrivateRouteTable2
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NAT2

  PrivateRouteTable1:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC

  PrivateRouteTable2:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC

  RouteTableAssociation1:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref Subnet1
      RouteTableId: !Ref RouteTable

  RouteTableAssociation2:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref Subnet2
      RouteTableId: !Ref RouteTable

  RouteTableAssociation3:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref Subnet3
      RouteTableId: !Ref PrivateRouteTable1

  RouteTableAssociation4:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref Subnet4
      RouteTableId: !Ref PrivateRouteTable2

  RouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
      Tags:
        - Key: Name
          Value: !Ref Name

  DefaultRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref RouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway

Outputs:
  Subnets:
    Value: !Join [ ",", [ !Ref Subnet1, !Ref Subnet2 ] ]
  Subnet1:
    Value: !Ref Subnet1
  Subnet2:
    Value: !Ref Subnet2
  Subnet3:
    Value: !Ref Subnet3
  Subnet4:
    Value: !Ref Subnet4
  VpcId:
    Value: !Ref VPC