AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverless patterns - Amazon API Gateway Custom Domain Name

Parameters:

  DomainName:
    Type: String

  CertificateArn:
    Type: String

  PublicHostedZoneId:
    Type: String
  
  ApiId: 
    Type: String
  
  Stage:
    Type: String

Resources:
  
  CustomDomainRegional:
    Type: AWS::ApiGatewayV2::DomainName
    Properties:
      DomainName: !Ref DomainName
      DomainNameConfigurations:
      - SecurityPolicy: TLS_1_2
        CertificateArn: !Ref CertificateArn
        EndpointType: REGIONAL

  MappingRegional:
    Type: AWS::ApiGatewayV2::ApiMapping
    DependsOn:
      - CustomDomainRegional
    Properties:
      DomainName: !Ref DomainName
      ApiId: !Ref ApiId
      Stage: !Ref Stage

  Route53AliasRecordRegional:
    Type: AWS::Route53::RecordSet
    DependsOn:
      - CustomDomainRegional
    Properties:
      Name: !Ref DomainName
      Type: A
      HostedZoneId: !Ref PublicHostedZoneId
      AliasTarget:
        DNSName: !GetAtt CustomDomainRegional.RegionalDomainName
        HostedZoneId: !GetAtt CustomDomainRegional.RegionalHostedZoneId

Outputs:

  # Custom Domain Name endpoint to be used during tests
  CustomDomainNameEndpoint:
    Description: Custom Domain Name endpoint
    Value: !Sub "https://${DomainName}"