AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverless patterns - Edge-Optimized Custom Domain Name that points to a REST API regional with Lambda proxy integration
 
 #Parameters for certificate and domain name
Parameters:
  CertifArn:
    Type: String
    Description: ARN of the ACM Certificate you want to use

  CustomDomainName:
    Type: String
    Description: "Name of the domain you want to use, eg: www.example.com" 

Resources:
#Lambda function
  LambdaCustomEdge:
    Type: AWS::Serverless::Function 
    Properties:
      Handler: index.lambda_handler
      InlineCode: |
        import json
        def lambda_handler(event, context):
            return {
        "statusCode": 200,
        "body": json.dumps({
          "message" : "Hello World! This is the edge-optimized custom domain name and the regional API"}),
        }
      Runtime: python3.9
      Events:
        HelloWorld:
          Type: Api 
          Properties: 
            Path: /
            Method: get
            RestApiId:
              Ref: ApiRegional
#Regional API with Edge-optimized domain name 
  ApiRegional:
    Type: AWS::Serverless::Api
    Properties:
      StageName: prod
      EndpointConfiguration: REGIONAL
      Domain:
        DomainName: !Ref CustomDomainName
        CertificateArn: !Ref CertifArn
        EndpointConfiguration: EDGE