AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Process a user-provided video (e.g video.mp4) into a series of screenshots.

Parameters:
  InputFile:
    Type: String
    Default: video.MP4
  EFSpath:
    Type: String
    Default: /mnt/efs
  SecurityGroupIds:
    Type: CommaDelimitedList
    Default: sg-fa7133bc
  SubnetIDs:
    Type: CommaDelimitedList
    Description: The list of SubnetIDs in your Virtual Private Cloud (VPC)
    Default: subnet-80c98eae,subnet-04878f4e,subnet-e19ce486,subnet-bfc9fbb0,subnet-0bc28757,subnet-96c847a8
  AccessPointARN:
    Type: String
    Description: Access point ARN

Resources:
  ProcessFileFunction:
    Type: AWS::Serverless::Function 
    Properties:
      CodeUri: processFile/
      Timeout: 300
      MemorySize: 2048      
      Handler: app.handler
      Layers: 
        - arn:aws:lambda:us-east-1:780018668030:layer:ffmpeg:1
      Environment:
        Variables:
          INPUT_FILE: !Ref InputFile
          EFS_PATH: !Ref EFSpath
      Runtime: nodejs12.x
      Events:
        API:
          Type: Api 
          Properties:
            Path: /processFile
            Method: get
      VpcConfig:
        SecurityGroupIds: !Ref SecurityGroupIds
        SubnetIds: !Ref SubnetIDs
      FileSystemConfigs:
      - Arn: !Ref AccessPointARN
        LocalMountPath: !Ref EFSpath
      Policies:
      - Statement:
        - Sid: AWSLambdaVPCAccessExecutionRole
          Effect: Allow
          Action:
            - logs:CreateLogGroup
            - logs:CreateLogStream
            - logs:PutLogEvents
            - ec2:CreateNetworkInterface
            - ec2:DescribeNetworkInterfaces
            - ec2:DeleteNetworkInterface
          Resource: "*"
        - Sid: AmazonElasticFileSystemClientFullAccess
          Effect: Allow
          Action:
            - elasticfilesystem:ClientMount
            - elasticfilesystem:ClientRootAccess
            - elasticfilesystem:ClientWrite
            - elasticfilesystem:DescribeMountTargets
          Resource: "*"

Outputs:
  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  API:
    Description: "API Gateway endpoint URL for Prod stage for function"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/processFile/"