AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: Happy Path - Example workflow 1

Parameters:
  ApplicationTableName:
    Type: String
    Description: Name of application's DynamoDB table
    Default: hp-application

  S3UploadBucketName:
    Type: String
    Description: The name for the S3 upload bucket.
    Default: 'happy-path-upload'

  S3DistributionBucketName:
    Type: String
    Description: The name for the S3 upload bucket.
    Default: 'happy-path-distribution'

  StreamARN:
    Type: String
    Description: The ARN for the DynamoDB table stream.
    Default: 'arn:aws:dynamodb:us-east-1:123456789012:table/hp-application/stream/2020-06-29T14:29:10.716'

  SharpLayerARN:
    Type: String
    Description: The ARN for the Sharp Lambda Layer.
    Default: 'arn:aws:lambda:us-east-1:123456789012:layer:node-sharp:3'

Globals:
  Function:
    Timeout: 5
    Runtime: nodejs12.x
    Tags:
      Application: HappyPath

Resources:
  #Lambda functions
  ResizerFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/resizer/
      Handler: app.handler
      MemorySize: 2056
      Layers:
        - !Ref SharpLayerARN
      Environment:
        Variables:
          OutputBucket: !Ref S3DistributionBucketName
          TableName: !Ref ApplicationTableName              
      Policies:
        - S3ReadPolicy:
            BucketName: !Ref S3UploadBucketName
        - S3CrudPolicy:
            BucketName: !Ref S3DistributionBucketName
        - DynamoDBWritePolicy:
            TableName: !Ref ApplicationTableName              

  #Lambda functions
  PublishFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: ../../functions/publish/
      Handler: app.handler
      MemorySize: 128
      Layers:
        - !Ref SharpLayerARN
      Environment:
        Variables:
          TableName: !Ref ApplicationTableName              
      Policies:
        - DynamoDBWritePolicy:
            TableName: !Ref ApplicationTableName       

  # Step Functions state machine
  v1StateMachine:
    Type: AWS::Serverless::StateMachine
    Properties:
      DefinitionUri: ../../statemachines/v1.asl.json
      DefinitionSubstitutions:
        ResizerFunctionArn: !GetAtt ResizerFunction.Arn
        PublishFunctionArn: !GetAtt PublishFunction.Arn
      Events:
        UploadComplete:
          Type: EventBridgeRule
          Properties:
            Pattern:
              source:
              - custom.happyPath
              detail-type:
              - uploadComplete
      Policies: # Find out more about SAM policy templates: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-policy-templates.html
        - LambdaInvokePolicy:
            FunctionName: !Ref ResizerFunction
        - LambdaInvokePolicy:
            FunctionName: !Ref PublishFunction