# Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0

AWSTemplateFormatVersion: 2010-09-09
Description: >
  This template deploys the service target group.
Metadata:
  version: 1.0.0
Parameters:
  pApp:
    Description: Name of the Application to which the resource belongs
    Type: String
  pLoadBalancerListener:
    Description: Loadbalancer listener
    Type: String
    
  # pVpcId:
  #   Description: SSM Parameter with the ID of VPC where resources will be created. VPC is loaded into the paramater
  #                store when an ELZ account is provisioned. The parameter store key is the "Default:" value provided below. 
  #   Type: 'AWS::SSM::Parameter::Value<AWS::EC2::VPC::Id>'
  #   Default: /sharedservices/us-east-1/vpc/vpc
  pVpcId:
    Type: 'AWS::EC2::VPC::Id'
    Description: ID of VPC where resources will be created. 

  pPriority:
    Description: Priority for listener rule
    Type: Number
    Default: 65
  pAppPort:
    Description: The container port where the application is listening for request
    Type: String
    Default: 8080

Resources:
  #Create the Target Group for an Application Load Balancer
  #See AWS Resource Naming Standards - https://exampleent.atlassian.net/wiki/spaces/CLOUDDOC/pages/149718262/ELZ+AWS+Resource+Naming+Standards#ELZAWSResourceNamingStandards-ALB
  #See https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-targetgroup.html
  rEcsFargateTargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      VpcId: !Ref pVpcId
      Port: !Ref pAppPort
      Protocol: HTTP
      Matcher:
        HttpCode: 200-302
      HealthCheckIntervalSeconds: 5
      HealthCheckPath: "/"
      HealthCheckProtocol: HTTP
      HealthCheckTimeoutSeconds: 4
      HealthyThresholdCount: 3
      TargetType: "ip"
      TargetGroupAttributes:
        - Key: deregistration_delay.timeout_seconds
          Value: '30'

  #Create the Listener Rule 
  #See https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-listenerrule.html
  rEcsFargateListenerRule:
    Type: AWS::ElasticLoadBalancingV2::ListenerRule
    Properties:
      ListenerArn: !Ref pLoadBalancerListener
      Priority: !Ref pPriority
      Conditions:
        - Field: path-pattern
          Values: 
            - "/"
            - "/hello/*"
            - "hello*"
      Actions:
        - TargetGroupArn: !Ref rEcsFargateTargetGroup
          Type: forward
 
 
Outputs:
  oEcsFargateTargetGroupArn:
    Description: rEcsFargateTargetGroup Arn
    Value: !Ref rEcsFargateTargetGroup
  oEcsFargateTargetGroupFullName: 
    Description: rEcsFargateTargetGroup FullName
    Value: !GetAtt rEcsFargateTargetGroup.TargetGroupFullName
  oEcsFargateTargetGroupName: 
    Description: rEcsFargateTargetGroup Name
    Value: !GetAtt rEcsFargateTargetGroup.TargetGroupName