---
AWSTemplateFormatVersion: 2010-09-09


Parameters:
  Name:
    Type: String

  VpcCIDR:
    Type: String

  PublicSubnet1CIDR:
    Type: String

  PublicSubnet2CIDR:
    Type: String

  PrivateSubnet1CIDR:
    Type: String

  PrivateSubnet2CIDR:
    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

  NATGateway:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId:
        Fn::GetAtt:
        - EIPforNATGW
        - AllocationId
      SubnetId: !Ref Subnet1
      Tags:
        - Key: Name
          Value: !Ref Name
          
  EIPforNATGW:
    DependsOn: InternetGatewayAttachment
    Type: AWS::EC2::EIP
    Properties:
        Domain: vpc

  Subnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 0, !GetAZs ]
      MapPublicIpOnLaunch: true
      CidrBlock: !Ref PublicSubnet1CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Public)

  Subnet2:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 1, !GetAZs ]
      MapPublicIpOnLaunch: true
      CidrBlock: !Ref PublicSubnet2CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Public)

  PrivateSubnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 0, !GetAZs ]
      MapPublicIpOnLaunch: false
      CidrBlock: !Ref PrivateSubnet1CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Private)

  PrivateSubnet2:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      AvailabilityZone: !Select [ 1, !GetAZs ]
      MapPublicIpOnLaunch: false
      CidrBlock: !Ref PrivateSubnet2CIDR
      Tags:
        - Key: Name
          Value: !Sub ${Name} (Private)

  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

  Subnet1RouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref RouteTable
      SubnetId: !Ref Subnet1

  Subnet2RouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref RouteTable
      SubnetId: !Ref Subnet2

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

  NATRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref NATRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NATGateway

  PrivateSubnet1RouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref NATRouteTable
      SubnetId: !Ref PrivateSubnet1

  PrivateSubnet2RouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref NATRouteTable
      SubnetId: !Ref PrivateSubnet2

Outputs:
  Subnets:
    Value: !Join [ ",", [ !Ref Subnet1, !Ref Subnet2 ] ]
  PrivateSubnets:
    Value: !Join [ ",", [ !Ref PrivateSubnet1, !Ref PrivateSubnet2 ] ]
  VpcId:
    Value: !Ref VPC