Resources:
  AppSyncApiLambdaInvocationRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
        - Effect: Allow
          Principal:
            Service: appsync.amazonaws.com
          Action:
          - sts:AssumeRole

  HelloLambda:
    Type: AWS::Serverless::Function
    Properties:
      InlineCode: |
        exports.handler = async (_) => {
          return "Hello World"
        }
      Handler: index.handler
      Runtime: nodejs14.x

  AppSyncApi:
    Type: AWS::AppSync::GraphQLApi
    Properties:
      AuthenticationType: API_KEY
      Name: AppSyncApi

  ApiSchema:
    Type: AWS::AppSync::GraphQLSchema
    Properties:
      ApiId: !GetAtt AppSyncApi.ApiId
      Definition: |
        type Query {
          sayHello: String!
        }
        schema {
          query: Query
        }

  AppSyncLambdaDataSource:
    Type: AWS::AppSync::DataSource
    Properties:
      ApiId: !GetAtt AppSyncApi.ApiId
      Name: AppSyncLambdaDataSource
      Type: AWS_LAMBDA
      ServiceRoleArn: !GetAtt AppSyncApiLambdaInvocationRole.Arn
      LambdaConfig:
        LambdaFunctionArn: !GetAtt HelloLambda.Arn

  DataSourceToLambdaConnector:
    Type: AWS::Serverless::Connector
    Properties:
      Source:
        Id: AppSyncLambdaDataSource
      Destination:
        Id: HelloLambda
      Permissions:
      - Write