AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Using AWS AppConfig with AWS Lambda Extensions

Parameters:
  AppName:
    Type: String
    Description: Name of the application
    Default: 'AppConfigLambda'

Globals:
  Function:
    Timeout: 3

Resources:
  AppConfigLambdaFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: 
      Handler: app.handler
      Runtime: nodejs12.x
      CodeUri: src/
      Layers:
          - !FindInMap [AppConfigLayer, !Ref "AWS::Region", ARN]
      Policies:
        - Version: '2012-10-17'
          Statement:
            - Effect: Allow
              Action:
                - appconfig:GetConfiguration
              Resource:
                - Fn::Join:
                  - ''
                  - - 'arn:aws:appconfig:*:*:application/'
                    - Ref: AppConfigLambdaApplication
                - Fn::Join:
                  - ''
                  - - 'arn:aws:appconfig:*:*:application/'
                    - Ref: AppConfigLambdaApplication
                    - '/configurationprofile/'
                    - Ref: AppConfigLambdaConfigurationProfile
                - Fn::Join:
                  - ''
                  - - 'arn:aws:appconfig:*:*:application/'
                    - Ref: AppConfigLambdaApplication
                    - '/environment/'
                    - Ref: AppConfigLambdaEnvironment
      Environment:
        Variables:
          APPCONFIG_APPLICATION: !Ref AppConfigLambdaApplication
          APPCONFIG_ENVIRONMENT: !Ref AppConfigLambdaEnvironment
          APPCONFIG_CONFIGURATION: !Ref AppConfigLambdaConfigurationProfile
      #     AWS_APPCONFIG_EXTENSION_POLL_INTERVAL_SECONDS: 45
      #     AWS_APPCONFIG_EXTENSION_POLL_TIMEOUT_MILLIS: 3000
      #     AWS_APPCONFIG_EXTENSION_HTTP_PORT: 2772
      Events:
        AppConfigLambda:
          Type: HttpApi
          Properties:
            ApiId: !Ref HttpApi
            Path: /
            Method: GET
  HttpApi:
    Type: AWS::Serverless::HttpApi
    Properties:
      FailOnWarnings: True
  AppConfigLambdaApplication:
    Type: 'AWS::AppConfig::Application'
    Properties:
      Name: !Ref AppName
  AppConfigLambdaEnvironment:
    Type: 'AWS::AppConfig::Environment'
    Properties:
      Name: !Ref AppName
      ApplicationId: !Ref AppConfigLambdaApplication
  AppConfigLambdaConfigurationProfile:
    Type: 'AWS::AppConfig::ConfigurationProfile'
    Properties:
      Name: !Ref AppName
      ApplicationId: !Ref AppConfigLambdaApplication
      LocationUri: hosted
      Validators:
        - Content: '{ "$schema": "http://json-schema.org/draft-04/schema#", "type": "object", "properties": { "isEnabled": { "type": "boolean" }, "messageOption": { "type": "string", "minimum": 0 } }, "required": ["isEnabled", "messageOption"] }'
          Type: JSON_SCHEMA
  AppConfigLambdaConfigurationVersion:
    Type: AWS::AppConfig::HostedConfigurationVersion
    Properties:
      ApplicationId: !Ref AppConfigLambdaApplication
      ConfigurationProfileId: !Ref AppConfigLambdaConfigurationProfile
      Content: '{ "isEnabled": false, "messageOption": "AppConfig" }'
      ContentType: 'application/json'
  AppConfigLambdaDeploymentStrategy:
    Type: AWS::AppConfig::DeploymentStrategy
    Properties: 
      Name: !Ref AppName
      DeploymentDurationInMinutes: 0
      FinalBakeTimeInMinutes: 0
      GrowthFactor: 100
      GrowthType: LINEAR
      ReplicateTo: NONE
  AppConfigLambdaDeployment:
    Type: AWS::AppConfig::Deployment
    Properties: 
      ApplicationId: !Ref AppConfigLambdaApplication
      ConfigurationProfileId: !Ref AppConfigLambdaConfigurationProfile
      ConfigurationVersion: !Ref AppConfigLambdaConfigurationVersion
      DeploymentStrategyId: !Ref AppConfigLambdaDeploymentStrategy
      EnvironmentId: !Ref AppConfigLambdaEnvironment

Mappings:
  AppConfigLayer: 
    us-east-1:
      ARN: arn:aws:lambda:us-east-1:027255383542:layer:AWS-AppConfig-Extension:1
    us-east-2:
      ARN: arn:aws:lambda:us-east-2:728743619870:layer:AWS-AppConfig-Extension:1
    us-west-1:
      ARN: arn:aws:lambda:us-west-1:958113053741:layer:AWS-AppConfig-Extension:1
    us-west-2:
      ARN: arn:aws:lambda:us-west-2:359756378197:layer:AWS-AppConfig-Extension:1
    ca-central-1:
      ARN: arn:aws:lambda:ca-central-1:039592058896:layer:AWS-AppConfig-Extension:1
    eu-central-1:
      ARN: arn:aws:lambda:eu-central-1:066940009817:layer:AWS-AppConfig-Extension:1
    eu-west-1:
      ARN: arn:aws:lambda:eu-west-1:434848589818:layer:AWS-AppConfig-Extension:1
    eu-west-2:
      ARN: arn:aws:lambda:eu-west-2:282860088358:layer:AWS-AppConfig-Extension:1
    eu-west-3:
      ARN: arn:aws:lambda:eu-west-3:493207061005:layer:AWS-AppConfig-Extension:1
    eu-north-1:
      ARN: arn:aws:lambda:eu-north-1:646970417810:layer:AWS-AppConfig-Extension:1
    eu-south-1:
      ARN: arn:aws:lambda:eu-south-1:203683718741:layer:AWS-AppConfig-Extension:1
    ap-east-1:
      ARN: arn:aws:lambda:ap-east-1:630222743974:layer:AWS-AppConfig-Extension:1
    ap-northeast-1:
      ARN: arn:aws:lambda:ap-northeast-1:980059726660:layer:AWS-AppConfig-Extension:1
    ap-northeast-2:
      ARN: arn:aws:lambda:ap-northeast-2:826293736237:layer:AWS-AppConfig-Extension:1
    ap-southeast-1:
      ARN: arn:aws:lambda:ap-southeast-1:421114256042:layer:AWS-AppConfig-Extension:1
    ap-southeast-2:
      ARN: arn:aws:lambda:ap-southeast-2:080788657173:layer:AWS-AppConfig-Extension:1
    ap-south-1:
      ARN: arn:aws:lambda:ap-south-1:554480029851:layer:AWS-AppConfig-Extension:1
    sa-east-1:
      ARN: arn:aws:lambda:sa-east-1:000010852771:layer:AWS-AppConfig-Extension:1
    af-south-1:
      ARN: arn:aws:lambda:af-south-1:574348263942:layer:AWS-AppConfig-Extension:1
    me-south-1:
      ARN: arn:aws:lambda:me-south-1:559955524753:layer:AWS-AppConfig-Extension:1

Outputs:
  HttpApiUrl:
    Description: URL of your API endpoint
    Value:
      Fn::Sub: 'https://${HttpApi}.execute-api.${AWS::Region}.${AWS::URLSuffix}/'
  AppConfigUrl:
    Description: URL to your application in AppConfig
    Value:
      Fn::Sub: 'https://${AWS::Region}.console.aws.amazon.com/systems-manager/appconfig/applications/${AppConfigLambdaApplication}/'
  AppConfigHostedConfigurationUrl:
    Description: URL to your hosted configuration in AppConfig
    Value:
      Fn::Sub: 'https://${AWS::Region}.console.aws.amazon.com/systems-manager/appconfig/applications/${AppConfigLambdaApplication}/configurationprofiles/${AppConfigLambdaConfigurationProfile}/versions'