# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  parallel-invocations
  
  Sample SAM Template for parallel-invocations

Resources:
  EventBus:
    Type: AWS::Events::EventBus
    Properties: 
      Name: AnyCompany
  
  PublishEventsFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: functions/publish-events/
      Handler: publish-events
      Runtime: go1.x
      Policies:
        - EventBridgePutEventsPolicy:
            EventBusName: !Ref EventBus
  
  ExpiredSubscriptionRule:
    Type: AWS::Events::Rule
    Properties:
      Description: Listen on the custom event bus for SubscriptionExpired events
      EventBusName: !Ref EventBus
      EventPattern:
        source:
          - "com.anycompany"
        detail-type:
          - subscription-expired
      State: ENABLED
      Targets:
      - Arn: !Ref ExpiredSubscriptionWorkflow
        Id: ExpiredSubscriptionWorkflow
        RoleArn: !GetAtt InvokeWorkflowRole.Arn
  
  ExpiredSubscriptionWorkflow:
    Type: AWS::Serverless::StateMachine
    Properties:
      Name: Parallel-Invocation
      Policies:
        - LambdaInvokePolicy:
            FunctionName: !Ref PublishEventsFunction
      DefinitionUri: statemachine/parallel-invocations.asl.json
      DefinitionSubstitutions:
        EventBusName: !GetAtt EventBus.Name
        PublishEventsFunctionArn: !GetAtt PublishEventsFunction.Arn

  InvokeWorkflowRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - events.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: InvokeExpressWorkflowPolicy
          PolicyDocument:
            Version: "2012-10-17"
            Statement:
              - Effect: Allow
                Action: 
                  - states:StartExecution
                Resource:
                  - !Ref ExpiredSubscriptionWorkflow

Outputs:
  EventBusName:
    Description: "The name of the event bus"
    Value: !GetAtt EventBus.Name