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AWSTemplateFormatVersion: 2010-09-09
Description: Service Catalog SNS Product
Parameters:
  TopicName:
    Description: SNS Topic Name
    Type: String
  KMSId:
    Description: KMS Encryption Key Id
    Type: String
  PolicyPrincipal:
    Description: SNS Policy Principals separated by comma
    Type: String
    Default: ''
  PolicyAction:
    Description: SNS Policy Actions separated by comma
    Type: String
    Default: ''

Conditions:
  HasPolicy: !And
    - !Not [!Equals [!Ref PolicyPrincipal, ""]]
    - !Not [!Equals [!Ref PolicyAction, ""]]

Resources:
  PolicyPrincipalAccess:
      Type: "Custom::ResourceCompliance"
      Condition : HasPolicy
      Version: "1.0"
      Properties:
        ServiceToken: !Sub 'arn:aws:lambda:${AWS::Region}:${AWS::AccountId}:function:sc-resource-compliance'
        Action:
          Name: principal
          Parameters:
            Principal: !Ref PolicyPrincipal
            Account: !Ref AWS::AccountId
  SNS:
    Type: AWS::SNS::Topic
    Properties:
      DisplayName: !Ref TopicName
      TopicName: !Ref TopicName
      KmsMasterKeyId: !Ref KMSId
  Policy:
    Type: AWS::SNS::TopicPolicy
    Condition: HasPolicy
    DependsOn: SNS
    Properties:
      PolicyDocument:
        Version: "2008-10-17"
        Id: "CustomPolicyId"
        Statement:
          -
            Sid: "CustomPolicy"
            Effect: "Allow"
            Principal:
              AWS: !Split [',', !GetAtt PolicyPrincipalAccess.Principal]
            Action: !Split [ "," , !Ref PolicyAction ]
            Resource: !Ref SNS
      Topics:
        - !Ref SNS

Outputs:
  SNSArn:
    Value: !Ref SNS
    Export:
      Name: !Sub ${AWS::StackName}-SNSArn