---
AWSTemplateFormatVersion: '2010-09-09'

Description: >
  From the blog post, Visualize your Amazon Lookout for Metrics Anomaly Results, this script will
  create the Lookout For Metrics Anomaly Detector Alert with an SMS target.

Parameters:

  SmsPhoneNumber:
    Description: >
      Number to use for receiving text alerts in the E.164 format (e.g. for US, +1XXX5550100).
    Type: String

Resources:

  L4MLiveDetectorSnsTopic:
    Type: AWS::SNS::Topic
    Properties:
      DisplayName: L4MLiveDetectorSnsTopic
      KmsMasterKeyId: 'aws/sns'
      Subscription: 
        - Protocol: sms
          Endpoint: !Ref SmsPhoneNumber  
          
  L4MLiveDetectorAlertRole: 
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument: 
        Version: '2012-10-17'
        Statement: 
          - Effect: Allow
            Principal: 
              Service: lookoutmetrics.amazonaws.com
            Action: sts:AssumeRole
      Policies:
        - PolicyName: L4MLiveDetectorAlertPolicy
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action: sns:Publish
                Resource: !Ref L4MLiveDetectorSnsTopic

  L4MLiveDetectorAlert:
    Type: AWS::LookoutMetrics::Alert
    Properties: 
      Action: 
        SNSConfiguration:
          RoleArn: !GetAtt L4MLiveDetectorAlertRole.Arn
          SnsTopicArn: !Ref L4MLiveDetectorSnsTopic
      AlertDescription: 'L4M Live Detector Test SMS Alert'
      AlertSensitivityThreshold: 50
      AnomalyDetectorArn: !ImportValue L4MLiveDetectorArn