AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: Hello world Direct Lambda Resolver

Globals:
  Function:
    Timeout: 5
    Runtime: python3.12
    Tracing: Active
    Environment:
      Variables:
        # Powertools for AWS Lambda (Python) env vars: https://docs.powertools.aws.dev/lambda/python/latest/#environment-variables
        POWERTOOLS_LOG_LEVEL: INFO
        POWERTOOLS_LOGGER_SAMPLE_RATE: 0.1
        POWERTOOLS_LOGGER_LOG_EVENT: true
        POWERTOOLS_SERVICE_NAME: example

Resources:
  TodosFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: getting_started_graphql_api_resolver.lambda_handler
      CodeUri: ../src
      Description: Sample Direct Lambda Resolver

  # IAM Permissions and Roles

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

  InvokeLambdaResolverPolicy:
    Type: "AWS::IAM::Policy"
    Properties:
      PolicyName: "DirectAppSyncLambda"
      PolicyDocument:
        Version: "2012-10-17"
        Statement:
          - Effect: "Allow"
            Action: "lambda:invokeFunction"
            Resource:
              - !GetAtt TodosFunction.Arn
      Roles:
        - !Ref AppSyncServiceRole

  # GraphQL API

  TodosApi:
    Type: "AWS::AppSync::GraphQLApi"
    Properties:
      Name: TodosApi
      AuthenticationType: "API_KEY"
      XrayEnabled: true

  TodosApiKey:
    Type: AWS::AppSync::ApiKey
    Properties:
      ApiId: !GetAtt TodosApi.ApiId

  TodosApiSchema:
    Type: "AWS::AppSync::GraphQLSchema"
    Properties:
      ApiId: !GetAtt TodosApi.ApiId
      DefinitionS3Location: ../src/getting_started_schema.graphql
    Metadata:
      cfn-lint:
        config:
          ignore_checks:
            - W3002 # allow relative path in DefinitionS3Location

  # Lambda Direct Data Source and Resolver

  TodosFunctionDataSource:
    Type: "AWS::AppSync::DataSource"
    Properties:
      ApiId: !GetAtt TodosApi.ApiId
      Name: "HelloWorldLambdaDirectResolver"
      Type: "AWS_LAMBDA"
      ServiceRoleArn: !GetAtt AppSyncServiceRole.Arn
      LambdaConfig:
        LambdaFunctionArn: !GetAtt TodosFunction.Arn

  ListTodosResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt TodosApi.ApiId
      TypeName: "Query"
      FieldName: "listTodos"
      DataSourceName: !GetAtt TodosFunctionDataSource.Name

  GetTodoResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt TodosApi.ApiId
      TypeName: "Query"
      FieldName: "getTodo"
      DataSourceName: !GetAtt TodosFunctionDataSource.Name

  CreateTodoResolver:
    Type: "AWS::AppSync::Resolver"
    Properties:
      ApiId: !GetAtt TodosApi.ApiId
      TypeName: "Mutation"
      FieldName: "createTodo"
      DataSourceName: !GetAtt TodosFunctionDataSource.Name

Outputs:
  TodosFunction:
    Description: "Hello World Lambda Function ARN"
    Value: !GetAtt TodosFunction.Arn

  TodosApi:
    Value: !GetAtt TodosApi.GraphQLUrl