# CloudFormation template for creating an IAM role that a self-hosted Temporal Service can assume to invoke AgentCore runtimes.
AWSTemplateFormatVersion: '2010-09-09'
Description:
  Creates an IAM role that a self-hosted Temporal Service can assume to invoke Amazon Bedrock AgentCore runtimes.

Parameters:
  TemporalIamRoleArn:
    Type: String
    Description: The ARN of the IAM role or user that the Temporal Service runs as.

  AssumeRoleExternalId:
    Type: String
    Description: A unique identifier to prevent confused deputy attacks.
    AllowedPattern: '[a-zA-Z0-9_+=,.@-]*'
    MinLength: 5
    MaxLength: 45

  AgentRuntimeARNs:
    Type: CommaDelimitedList
    Description: >-
      Comma-separated list of AgentCore Runtime ARNs that Temporal may access. Append a wildcard to each Runtime ARN
      to include its endpoints.

  RoleName:
    Type: String
    Default: 'Temporal-AgentCore-Worker'

Resources:
  TemporalAgentCoreWorker:
    Type: AWS::IAM::Role
    Properties:
      RoleName: !Ref RoleName
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              AWS: [!Ref TemporalIamRoleArn]
            Action: sts:AssumeRole
            Condition:
              StringEquals:
                'sts:ExternalId': [!Ref AssumeRoleExternalId]
      Description: The role the Temporal Service uses to invoke AgentCore runtimes for Serverless Workers
      MaxSessionDuration: 3600

  TemporalAgentCoreInvokePermissions:
    Type: AWS::IAM::Policy
    Properties:
      PolicyName: 'Temporal-AgentCore-Invoke-Permissions'
      PolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Action:
              - bedrock-agentcore:InvokeAgentRuntime
              - bedrock-agentcore:GetAgentRuntimeEndpoint
            Resource: !Ref AgentRuntimeARNs
      Roles:
        - !Ref TemporalAgentCoreWorker

Outputs:
  RoleARN:
    Description: The ARN of the IAM role created for the Temporal Service
    Value: !GetAtt TemporalAgentCoreWorker.Arn

  AgentRuntimeARNs:
    Description: The AgentCore Runtime ARNs that Temporal may access
    Value: !Join [', ', !Ref AgentRuntimeARNs]