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

Parameters:
  DeployTestResources:
    Description: The parameter instructs the template whether or not to deploy test resources to your environment.
    Default: "True"
    Type: String
    AllowedValues:
      - "True"
      - "False"
    ConstraintDescription: Allowed values are True and False

Conditions:
  CreateTestResources: !Equals [!Ref DeployTestResources, "True"]

Resources:
  SourceBucket:
    Type: AWS::S3::Bucket
    UpdateReplacePolicy: Delete
    Properties:
      BucketName: 
        !Sub "async-lambda-dynamodb-source-${AWS::AccountId}"
      BucketEncryption:
        ServerSideEncryptionConfiguration:
        - ServerSideEncryptionByDefault:
            SSEAlgorithm: AES256
      PublicAccessBlockConfiguration:
        BlockPublicAcls: true
        BlockPublicPolicy: true
        IgnorePublicAcls: true
        RestrictPublicBuckets: true

  DestinationBucket:
    Type: AWS::S3::Bucket
    UpdateReplacePolicy: Delete
    Properties:
      BucketName:
        !Sub "async-lambda-dynamodb-destination-${AWS::AccountId}"
      BucketEncryption:
        ServerSideEncryptionConfiguration:
        - ServerSideEncryptionByDefault:
            SSEAlgorithm: AES256
      PublicAccessBlockConfiguration:
        BlockPublicAcls: true
        BlockPublicPolicy: true
        IgnorePublicAcls: true
        RestrictPublicBuckets: true

  RecordTransformationTable:
    Type: AWS::DynamoDB::Table
    Condition: CreateTestResources
    Properties:
      TableName:
        !Sub "async-lambda-dynamodb-record-transformation-${AWS::AccountId}"
      AttributeDefinitions:
        - AttributeName: id
          AttributeType: S
      KeySchema:
        - AttributeName: id
          KeyType: HASH
      TimeToLiveSpecification:
        AttributeName: time_to_live
        Enabled: true
      ProvisionedThroughput:
        ReadCapacityUnits: 2
        WriteCapacityUnits: 2

  ToUpperCaseHandlerFunction:
    Type: AWS::Serverless::Function
    Properties:
      Runtime: java17
      Handler: com.amazon.aws.sample.ToUpperCaseHandler::handleRequest
      Timeout: 60
      MemorySize: 1024
      Environment:
        Variables:
          DESTINATION_BUCKET_NAME: !Sub "async-lambda-dynamodb-destination-${AWS::AccountId}"
      Policies:
        - S3ReadPolicy:
            BucketName: 
              !Sub "async-lambda-dynamodb-source-${AWS::AccountId}"
        - S3WritePolicy:
            BucketName: 
              !Sub "async-lambda-dynamodb-destination-${AWS::AccountId}"
      Events:
        FileUpload:
          Type: S3
          Properties:
            Bucket: !Ref SourceBucket
            Events: s3:ObjectCreated:*
            Filter:
              S3Key:
                Rules:
                  - Name: suffix
                    Value: '.txt'


  TransformationHandlerFunction:
    Type: AWS::Serverless::Function
    Condition: CreateTestResources
    Properties:
      Runtime: java17
      Handler: com.amazon.aws.sample.TransformationHandler::handleRequest
      Timeout: 60
      MemorySize: 1024
      Environment:
        Variables:
          RECORD_TRANSFORMATION_TABLE_NAME: !Sub "async-lambda-dynamodb-record-transformation-${AWS::AccountId}"
      Policies:
        - S3ReadPolicy:
            BucketName: 
              !Sub "async-lambda-dynamodb-destination-${AWS::AccountId}"
        - DynamoDBWritePolicy:
            TableName: !Ref RecordTransformationTable
      Events:
        FileUpload:
          Type: S3
          Properties:
            Bucket: !Ref DestinationBucket
            Events: s3:ObjectCreated:*
            Filter:
              S3Key:
                Rules:
                  - Name: suffix
                    Value: '.txt'

Outputs:
  SourceBucketName:
    Description: "Source bucket for asynchronous testing sample"
    Value: !Ref SourceBucket

  DestinationBucketName:
    Description: "Destination bucket for asynchronous testing sample"
    Value: !Ref DestinationBucket

  TransformationHandlerFunctionName:
    Condition: CreateTestResources
    Description: "Lambda Function to listen for test results"
    Value: !Ref TransformationHandlerFunction

  RecordTransformationTable:
    Condition: CreateTestResources
    Description: "DynamoDB table to persist test results"
    Value: !Ref RecordTransformationTable