# This is the SAM template that represents the architecture of your serverless application
# https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-template-basics.html

# The AWSTemplateFormatVersion identifies the capabilities of the template
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/format-version-structure.html
AWSTemplateFormatVersion: 2010-09-09
Description: >-
  lambda-ssm

# Transform section specifies one or more macros that AWS CloudFormation uses to process your template
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/transform-section-structure.html
Transform:
- AWS::Serverless-2016-10-31

# 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:
  
  # This is the Lambda function definition associated with the source code: sqs-payload-logger.js. For all available properties, see
  # https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
  SQSPayloadLogger:
    Type: AWS::Serverless::Function
    Properties:
      Description: A Lambda function that logs the payload of messages sent to an associated SQS queue.
      Runtime: nodejs14.x
      Architectures:
        - x86_64
      Handler: src/handlers/sqs-payload-logger.sqsPayloadLoggerHandler
      # This property associates this Lambda function with the SQS queue defined above, so that whenever the queue
      # receives a message, the Lambda function is invoked
      Events:
        SQSQueueEvent:
          Type: SQS
          Properties:
            # This property resolves a ssm parameter that contains the arn of the sqs queue
            Queue: !Sub '{{resolve:ssm:terraform-example-queue-arn:1}}'
            BatchSize: 1
      MemorySize: 128
      Timeout: 25 # Chosen to be less than the default SQS Visibility Timeout of 30 seconds
      Policies:
        - AWSLambdaBasicExecutionRole
        - SQSPollerPolicy:
            QueueName: 'terraform-example-queue'