AWSTemplateFormatVersion: 2010-09-09
Description: >-
  aws-lambda-sns-poc
Transform:
  - AWS::Serverless-2016-10-31

# More info about Globals: /~https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    LoggingConfig:
      LogFormat: JSON

# Resources declares the AWS resources that you want to include in the stack
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resources-section-structure.html
Resources:
  SnsTopic:
    Type: AWS::SNS::Topic
    Properties:
      TopicName: SnsTopicEmailAlert
      DisplayName: SnsTopicEmailAlert
      Subscription:
        - Endpoint: sample@email.com
          Protocol: email

  # Each Lambda function is defined by properties:
  # /~https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction

  # This is a Lambda function config associated with the source code: app.ts
  LambdaToSnsFunction:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: !Sub ${AWS::StackName}-LambdaToSns
      Handler: src/app.handler
      Runtime: nodejs20.x
      Architectures:
        - arm64
      MemorySize: 128
      Timeout: 30
      Description: A Lambda function that sends a message to an SNS topic.
      Events:
        Api:
          Type: Api
          Properties:
            Path: /
            Method: POST
      Environment:
        Variables:
          SNS_TOPIC_ARN: !Ref SnsTopic
    Connectors:
      SnsTopicConnector:
        Properties:
          Destination:
            Id: SnsTopic
          Permissions:
            - Write

    Metadata: # Manage esbuild properties
      BuildMethod: esbuild
      BuildProperties:
        Minify: true
        Target: "es2020"
        EntryPoints:
          - src/app.ts
        External: # Define external dependencies
          - "@aws-sdk/*"

Outputs:
  WebEndpoint:
    Description: API Gateway endpoint URL for Prod stage
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/"