---
AWSTemplateFormatVersion: "2010-09-09"
Description: This stack deploys the resources required to replicate change events from Amazon DocumentDB (with MongoDB compatibility) to Amazon Elasticsearch service

Parameters:

  DocDBUsername:
    Type: String
    Description: Username for the Amazon DocumentDB cluster

  DocDBPassword:
    Type: String
    Description: Password for the Amazon DocumentDB cluster
    NoEcho: true
    MinLength: 8

Mappings:

  SubnetConfig:
    VPC:
      CIDR: '10.0.0.0/16'
    PublicOne:
      CIDR: '10.0.0.0/24'
    PublicTwo:
      CIDR: '10.0.1.0/24'
    PublicThree:
      CIDR: '10.0.2.0/24'
    PrivateOne:
      CIDR: '10.0.100.0/24'
    PrivateTwo:
      CIDR: '10.0.101.0/24'
    PrivateThree:
      CIDR: '10.0.102.0/24'

Resources:
 
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      EnableDnsSupport: true
      EnableDnsHostnames: true
      CidrBlock: !FindInMap ['SubnetConfig', 'VPC', 'CIDR']
      Tags:
        - Key: Name
          Value: !Sub VPC-${AWS::StackName}

  PublicSubnetOne:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 0
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PublicOne', 'CIDR']
      MapPublicIpOnLaunch: true
      Tags:
        - Key: Name
          Value: !Sub PublicOne-${AWS::StackName}

  PublicSubnetTwo:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 1
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PublicTwo', 'CIDR']
      MapPublicIpOnLaunch: true
      Tags:
        - Key: Name
          Value: !Sub PublicTwo-${AWS::StackName}

  PublicSubnetThree:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 2
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PublicThree', 'CIDR']
      MapPublicIpOnLaunch: true
      Tags:
        - Key: Name
          Value: !Sub PublicThree-${AWS::StackName}

  PrivateSubnetOne:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 0
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PrivateOne', 'CIDR']
      Tags:
        - Key: Name
          Value: !Sub PrivateOne-${AWS::StackName}

  PrivateSubnetTwo:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 1
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PrivateTwo', 'CIDR']
      Tags:
        - Key: Name
          Value: !Sub PrivateTwo-${AWS::StackName}

  PrivateSubnetThree:
    Type: AWS::EC2::Subnet
    Properties:
      AvailabilityZone:
         Fn::Select:
         - 2
         - Fn::GetAZs: {Ref: 'AWS::Region'}
      VpcId: !Ref VPC
      CidrBlock: !FindInMap ['SubnetConfig', 'PrivateThree', 'CIDR']
      Tags:
        - Key: Name
          Value: !Sub PrivateThree-${AWS::StackName}

  InternetGateway:
    Type: AWS::EC2::InternetGateway
  GatewayAttachement:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway
  PublicRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
  PublicRoute:
    Type: AWS::EC2::Route
    DependsOn: GatewayAttachement
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway
  PublicSubnetOneRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PublicSubnetOne
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetTwoRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PublicSubnetTwo
      RouteTableId: !Ref PublicRouteTable
  PublicSubnetThreeRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PublicSubnetThree
      RouteTableId: !Ref PublicRouteTable

  NatGatewayOneAttachment:
    Type: AWS::EC2::EIP
    DependsOn: GatewayAttachement
    Properties:
        Domain: vpc
  NatGatewayTwoAttachment:
    Type: AWS::EC2::EIP
    DependsOn: GatewayAttachement
    Properties:
        Domain: vpc
  NatGatewayThreeAttachment:
    Type: AWS::EC2::EIP
    DependsOn: GatewayAttachement
    Properties:
        Domain: vpc
  NatGatewayOne:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt NatGatewayOneAttachment.AllocationId
      SubnetId: !Ref PublicSubnetOne
  NatGatewayTwo:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt NatGatewayTwoAttachment.AllocationId
      SubnetId: !Ref PublicSubnetTwo
  NatGatewayThree:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt NatGatewayThreeAttachment.AllocationId
      SubnetId: !Ref PublicSubnetThree
  PrivateRouteTableOne:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
  PrivateRouteOne:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PrivateRouteTableOne
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NatGatewayOne
  PrivateRouteTableOneAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref PrivateRouteTableOne
      SubnetId: !Ref PrivateSubnetOne
  PrivateRouteTableTwo:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
  PrivateRouteTwo:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PrivateRouteTableTwo
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NatGatewayTwo
  PrivateRouteTableTwoAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref PrivateRouteTableTwo
      SubnetId: !Ref PrivateSubnetTwo
  PrivateRouteTableThree:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
  PrivateRouteThree:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PrivateRouteTableThree
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NatGatewayThree
  PrivateRouteTableThreeAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      RouteTableId: !Ref PrivateRouteTableThree
      SubnetId: !Ref PrivateSubnetThree

  DocumentDBSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties: 
      GroupDescription: Amazon DocumentDB Security Group
      VpcId: !Ref VPC
      SecurityGroupIngress:
         - IpProtocol: tcp
           CidrIp: 10.0.0.0/16
           FromPort: 27017
           ToPort: 27017
  
  DocumentDBSubnetGroup:
    Type: AWS::DocDB::DBSubnetGroup
    Properties: 
      DBSubnetGroupDescription: Subnet Group for DocumentDB
      SubnetIds: 
         - !Ref PrivateSubnetOne
         - !Ref PrivateSubnetTwo
         - !Ref PrivateSubnetThree

  DocumentDBCluster:  
    Type: AWS::DocDB::DBCluster
    Properties: 
      DBClusterIdentifier: documentdb-base
      MasterUsername: !Ref DocDBUsername
      MasterUserPassword: !Ref DocDBPassword
      DBSubnetGroupName : !Ref DocumentDBSubnetGroup
      StorageEncrypted: yes
      Tags: 
        - Key: Name
          Value: !Sub DocumentDB-${AWS::StackName}
      VpcSecurityGroupIds: 
        - !Ref DocumentDBSecurityGroup
    DependsOn: VPC

  DocumentDBInstanceWriter: 
    Type: AWS::DocDB::DBInstance
    Properties: 
      DBClusterIdentifier: !Ref DocumentDBCluster
      DBInstanceClass: db.r5.large
      Tags: 
        - Key: Name
          Value: !Sub DocumentDBInstance-${AWS::StackName}

  DocumentDBInstanceReader1: 
    Type: AWS::DocDB::DBInstance
    Properties: 
      DBClusterIdentifier: !Ref DocumentDBCluster
      DBInstanceClass: db.r5.large
      Tags: 
        - Key: Name
          Value: !Sub DocumentDBInstance-${AWS::StackName}

  DocumentDBInstanceReader2: 
    Type: AWS::DocDB::DBInstance
    Properties: 
      DBClusterIdentifier: !Ref DocumentDBCluster
      DBInstanceClass: db.r5.large
      Tags: 
        - Key: Name
          Value: !Sub DocumentDBInstance-${AWS::StackName}
  AWSCloud9SSMAccessRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          -
            Effect: Allow
            Principal:
              Service:
                - ec2.amazonaws.com
                - cloud9.amazonaws.com
            Action:
              - sts:AssumeRole
      ManagedPolicyArns:
        - arn:aws:iam::aws:policy/AWSCloud9SSMInstanceProfile
        - arn:aws:iam::aws:policy/AdministratorAccess
      RoleName: AWSCloud9SSMAccessRole
      Path: /service-role/

  AWSCloud9SSMInstanceProfile: 
    Type: "AWS::IAM::InstanceProfile"
    DependsOn: AWSCloud9SSMAccessRole
    Properties: 
      InstanceProfileName: AWSCloud9SSMInstanceProfile 
      Path: /cloud9/
      Roles: 
        - 
          Ref: AWSCloud9SSMAccessRole

  Cloud9env:
    Type: AWS::Cloud9::EnvironmentEC2
    DependsOn: DocumentDBCluster
    Properties: 
      ConnectionType: CONNECT_SSM 
      Description: Cloud9 instance to access Cloud9
      InstanceType: t3.small
      Name: DocumentDBCloud9
      SubnetId: !Ref PrivateSubnetOne

Outputs:
  VpcId:
    Value: !Ref VPC
  PrivateSubnetOne:
    Value: !Ref PrivateSubnetOne
  PrivateSubnetTwo:
    Value: !Ref PrivateSubnetTwo
  PrivateSubnetThree:
    Value: !Ref PrivateSubnetThree
  StackName:
    Value: !Sub ${AWS::StackName}
  DocumentDB:
    Value: !Ref DocumentDBCluster