AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Payments Dashboard - S3 CSV ingestion to Slack App Home

Globals:
  Function:
    Runtime: nodejs20.x
    Timeout: 30
    MemorySize: 256
    Environment:
      Variables:
        TABLE_NAME: !Ref DashboardTable

Resources:
  # VPC with private subnet + NAT Gateway for static outbound IP
  Vpc:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.20.0.0/16
      EnableDnsSupport: true
      EnableDnsHostnames: true
      Tags:
        - Key: Name
          Value: payments-dashboard-vpc

  PrivateSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref Vpc
      CidrBlock: 10.20.1.0/24
      AvailabilityZone: !Select [0, !GetAZs ""]
      Tags:
        - Key: Name
          Value: payments-dashboard-private

  PublicSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref Vpc
      CidrBlock: 10.20.2.0/24
      AvailabilityZone: !Select [0, !GetAZs ""]
      Tags:
        - Key: Name
          Value: payments-dashboard-public

  InternetGateway:
    Type: AWS::EC2::InternetGateway

  VpcGatewayAttachment:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref Vpc
      InternetGatewayId: !Ref InternetGateway

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

  NatGateway:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt NatEip.AllocationId
      SubnetId: !Ref PublicSubnet

  PublicRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref Vpc

  PublicRoute:
    Type: AWS::EC2::Route
    DependsOn: VpcGatewayAttachment
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway

  PublicSubnetRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PublicSubnet
      RouteTableId: !Ref PublicRouteTable

  PrivateRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref Vpc

  PrivateRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PrivateRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NatGateway

  PrivateSubnetRouteTableAssociation:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PrivateSubnet
      RouteTableId: !Ref PrivateRouteTable

  LambdaSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Payments Dashboard Lambda outbound access
      VpcId: !Ref Vpc
      SecurityGroupEgress:
        - IpProtocol: "-1"
          CidrIp: 0.0.0.0/0

  PaymentsCsvBucket:
    Type: AWS::S3::Bucket
    Properties:
      BucketName: !Sub seahaven-payments-csv-${AWS::AccountId}

  DashboardTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: PaymentsDashboard
      BillingMode: PAY_PER_REQUEST
      AttributeDefinitions:
        - AttributeName: pk
          AttributeType: S
      KeySchema:
        - AttributeName: pk
          KeyType: HASH

  ProcessPaymentCsvFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: payments-processPaymentCsv
      Handler: src/processPaymentCsv.handler
      VpcConfig:
        SubnetIds:
          - !Ref PrivateSubnet
        SecurityGroupIds:
          - !Ref LambdaSecurityGroup
      Events:
        CsvUpload:
          Type: S3
          Properties:
            Bucket: !Ref PaymentsCsvBucket
            Events: s3:ObjectCreated:*
            Filter:
              S3Key:
                Rules:
                  - Name: suffix
                    Value: .csv
      Policies:
        - S3ReadPolicy:
            BucketName: !Sub seahaven-payments-csv-${AWS::AccountId}
        - DynamoDBCrudPolicy:
            TableName: !Ref DashboardTable
        - Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Action:
                - ec2:CreateNetworkInterface
                - ec2:DescribeNetworkInterfaces
                - ec2:DeleteNetworkInterface
              Resource: "*"

  SlackAppHomeFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: payments-slackAppHome
      Handler: src/slackAppHome.handler
      VpcConfig:
        SubnetIds:
          - !Ref PrivateSubnet
        SecurityGroupIds:
          - !Ref LambdaSecurityGroup
      Environment:
        Variables:
          SLACK_BOT_TOKEN_PARAM: /payments-dashboard/slack-bot-token
      Events:
        SlackEvent:
          Type: HttpApi
          Properties:
            Path: /slack/events
            Method: POST
      Policies:
        - DynamoDBReadPolicy:
            TableName: !Ref DashboardTable
        - SSMParameterReadPolicy:
            ParameterName: payments-dashboard/slack-bot-token
        - Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Action:
                - ec2:CreateNetworkInterface
                - ec2:DescribeNetworkInterfaces
                - ec2:DeleteNetworkInterface
              Resource: "*"

  FetchBoaTransactionsFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: payments-fetchBoaTransactions
      Handler: src/fetchBoaTransactions.handler
      Timeout: 60
      VpcConfig:
        SubnetIds:
          - !Ref PrivateSubnet
        SecurityGroupIds:
          - !Ref LambdaSecurityGroup
      Environment:
        Variables:
          BOA_BASE_URL: https://sandbox.cashpro.bankofamerica.com
          BOA_API_TOKEN_PARAM: /payments-dashboard/boa-api-token
          BOA_ACCOUNT_NUMBER_PARAM: /payments-dashboard/boa-account-number
      Events:
        DailySchedule:
          Type: Schedule
          Properties:
            Schedule: cron(0 13 ? * MON-FRI *)
            Description: Fetch BoA previous day transactions at 9am ET (13:00 UTC)
            Enabled: false
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref DashboardTable
        - SSMParameterReadPolicy:
            ParameterName: payments-dashboard/boa-api-token
        - SSMParameterReadPolicy:
            ParameterName: payments-dashboard/boa-account-number
        - Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Action:
                - ec2:CreateNetworkInterface
                - ec2:DescribeNetworkInterfaces
                - ec2:DeleteNetworkInterface
              Resource: "*"

Outputs:
  SlackEventUrl:
    Description: URL to set as the Slack app Request URL
    Value: !Sub https://${ServerlessHttpApi}.execute-api.${AWS::Region}.amazonaws.com/slack/events
  CsvBucket:
    Description: S3 bucket for CSV uploads
    Value: !Ref PaymentsCsvBucket
  StaticOutboundIp:
    Description: Static IP for BoA API whitelist
    Value: !Ref NatEip