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

#
# This template demonstrates how to configure Amazon Route53 Failover record sets that use 
# Amazon Route53 Application Recovery Controller (ARC) healthchecks
#
# For a full description of how it works, please read
# https://aws.amazon.com/fr/blogs/aws/amazon-route-53-application-recovery-controller/
#
AWSTemplateFormatVersion: '2010-09-09'
Description: 'This template creates Amazon Route53 DNS Failover Records with healthcheck for the DynamoDB five-9s app'
Parameters:
  DNSDomainName:
    Description: The DNS domain name for the API
    Type: String 
  HostedZoneId:
    Description: "ID of the existing hosted zone"
    Type: String
  Region1:
    Description: The first region
    Type: String 
  Region2:
    Description: The second region
    Type: String 
  DNSHealthcheckId1:
    Description: The heatlh check ID for the first cell
    Type: String 
  DNSHealthcheckId2:
    Description: The heatlh check ID for the second cell
    Type: String 
  RegionalEndpoint1:
    Description: The regional API in the first region
    Type: String 
  RegionalEndpoint2:
    Description: The regional API in the second region
    Type: String 
  RegionalZone1:
    Description: The API Gateway hosted zone id in the first region
    Type: String
  RegionalZone2:
    Description: The API Gateway hosted zone id in the second region
    Type: String
  ProjectId:
    Type: String
    Default: "Dynamo59"

Resources:

#
# The PRIMARY and SECONDARY failover DNS records.
# These are A records as Aliases to the Load Balancer DNS name.
#
  FrontEndAliasRecordPrimary:
      Type: AWS::Route53::RecordSet
      Properties:
        Comment: Latency records for first region
        HostedZoneId: !Ref HostedZoneId
        Name: !Sub ${DNSDomainName}.
        Region: !Ref Region1
        Type: A
        AliasTarget:
          DNSName: !Sub ${RegionalEndpoint1}
          EvaluateTargetHealth: false
          HostedZoneId: !Sub ${RegionalZone1}
        SetIdentifier: !Sub ${ProjectId}-${Region1}
        HealthCheckId: !Sub ${DNSHealthcheckId1}

  FrontEndAliasRecordSecondary:
      Type: AWS::Route53::RecordSet
      Properties:
        Comment: Latency records for second region
        HostedZoneId: !Ref HostedZoneId
        Name: !Sub ${DNSDomainName}.
        Region: !Ref Region2
        Type: A
        AliasTarget:
          DNSName: !Sub ${RegionalEndpoint2}
          EvaluateTargetHealth: false
          HostedZoneId: !Sub ${RegionalZone2}
        SetIdentifier: !Sub ${ProjectId}-${Region2}
        HealthCheckId: !Sub ${DNSHealthcheckId2}

Outputs:
  DNSRecordName:
    Value: !Ref FrontEndAliasRecordSecondary