AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: >
  Request response

  Sample SAM Template for simple retry


Resources:
  WaitForCallbackStateMachine:
    Type: AWS::Serverless::StateMachine 
    Properties:
      DefinitionUri: statemachine/statemachine.asl.json
      DefinitionSubstitutions:
        topicArn: !Ref SNSTopic
        SQSQueue: !Ref SQSQueue
      Policies:
        - SNSPublishMessagePolicy: 
            TopicName: !GetAtt SNSTopic.TopicName
        - SQSSendMessagePolicy:
            QueueName: !GetAtt SQSQueue.QueueName


  SQSQueue:
    Type: 'AWS::SQS::Queue'
    Properties:
      DelaySeconds: 0
      VisibilityTimeout: 30
      RedrivePolicy:
        deadLetterTargetArn: !GetAtt [SQSQueueDLQ, Arn]
        maxReceiveCount: 1

  SQSQueueDLQ:
    Type: 'AWS::SQS::Queue'
    Properties:
      DelaySeconds: 0
      VisibilityTimeout: 30

  SNSTopic:
    Type: 'AWS::SNS::Topic'
    Properties:
      DisplayName: 'StepFunctionsTemplate-CallbackTopic'

  LambdaFunctionCallbackWithTaskToken:
    Type: AWS::Serverless::Function 
    Properties:
      Role: !GetAtt LambdaExecutionRole.Arn
      CodeUri: CallbackWithTaskToken/function/
      Handler: app.lambdaHandler
      Runtime: nodejs14.x
      Timeout: 3
      Events: 
        SQSEvent:
          Type: SQS
          Properties:
            Queue: !GetAtt SQSQueue.Arn
            BatchSize: 10
            Enabled: true
    


  LambdaExecutionRole:
    Type: "AWS::IAM::Role"
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service: lambda.amazonaws.com
            Action: "sts:AssumeRole"
      Policies:
        - PolicyName: StatesExecutionPolicy
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: Allow
                Action:
                  - "states:sendTaskSuccess"
                Resource: !Ref WaitForCallbackStateMachine


Outputs:
  WaitForCallbackStateMachine:
    Description: "state machine ARN"
    Value: !Ref WaitForCallbackStateMachine