AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: "backend

  Sample SAM Template for backend

  "
Parameters:
  BucketName:
    Type: String
  DomainName:
    Type: String
  OpenSearchURL:
    Type: String
  SagemakerEndpoint:
    Type: String
  LambdaCodeFile:
    Type: String
Globals:
  Function:
    Timeout: 60
    MemorySize: 512
  Api:
    Cors:
      AllowMethods: "'*'"
      AllowHeaders: "'*'"
      AllowOrigin: "'*'"
Resources:
  PostFetchSimilarPhotosLambda:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri:
        Bucket: !Ref BucketName
        Key: !Ref LambdaCodeFile
      Handler: app.lambda_handler
      Runtime: python3.8
      Environment:
        Variables:
          ES_ENDPOINT: !Ref OpenSearchURL
          SM_ENDPOINT: !Ref SagemakerEndpoint
      Policies:
        - Version: "2012-10-17"
          Statement:
            - Sid: AllowSagemakerInvokeEndpoint
              Effect: Allow
              Action:
                - sagemaker:InvokeEndpoint
              Resource: !Sub arn:aws:sagemaker:${AWS::Region}:${AWS::AccountId}:endpoint/${SagemakerEndpoint}
        - Version: "2012-10-17"
          Statement:
            - Sid: AllowESS
              Effect: Allow
              Action:
                - es:*
              Resource: !Sub arn:aws:es:${AWS::Region}:${AWS::AccountId}:domain/${DomainName}/*
        - S3ReadPolicy:
            BucketName: !Ref BucketName
      Events:
        PostURL:
          Type: Api
          Properties:
            Path: /postURL
            Method: post
        PostImage:
          Type: Api
          Properties:
            Path: /postImage
            Method: post
Outputs:
  ImageSimilarityApi:
    Description: API Gateway endpoint URL for Prod stage for fetchPhoto function
    Value: !Sub https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/
  PostFetchSimilarPhotosLambda:
    Description: Lambda Function ARN
    Value: !GetAtt PostFetchSimilarPhotosLambda.Arn