AWSTemplateFormatVersion: 2010-09-09
Transform: AWS::Serverless-2016-10-31

Resources:
  BillingQueue:
    Type: AWS::SQS::Queue
    Properties: 
      VisibilityTimeout: 120

  BillingQueuePolicy:
    Type: AWS::SQS::QueuePolicy
    Properties:
      Queues:
        - !Ref BillingQueue
      PolicyDocument:
        Id: AllowIncomingAccess
        Statement:
          - Effect: Allow
            Principal:
              AWS:
                - !Ref AWS::AccountId
            Action:
              - sqs:ReceiveMessage
            Resource:
             - !GetAtt BillingQueue.Arn
          - Effect: Allow
            Principal: '*'
            Action:
              - sqs:SendMessage
            Resource:
              - !GetAtt BillingQueue.Arn
            Condition:
              ArnEquals:
                aws:SourceArn: !ImportValue 'ClinicDemoProtectionArn'

  BillingLambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: python3.9
      Timeout: 60
      Handler: index.handler
      InlineCode: |-
          import json

          def handler(event, context):
            message = json.loads(event['Records'][0]['body'])   
            print("{} received from queue {}".format(message['Message'], event['Records'][0]['eventSourceARN']))
      Events:
        SQS:
          Type: SQS
          Properties:
            Queue: !GetAtt BillingQueue.Arn

  BillingSubscription:
    Type: AWS::SNS::Subscription
    Properties:
      TopicArn: !ImportValue 'ClinicDemoProtectionArn'
      Endpoint: !GetAtt BillingQueue.Arn
      Protocol: sqs