AWSTemplateFormatVersion: 2010-09-09
Description: Workload Template using Sigv2 S3 URLS (qs-1qkt7uig1)
Metadata:
  LICENSE: "Apache License, Version 2.0"
  AUTHOR: "Tony Bulding"
  EMAIL: "tbulding@amazon.com"
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: Simple test parameter
        Parameters:
          - SSMParameterValue
      - Label:
          default: The Stack Definition
        Parameters:
          - ChildTemplate
      - Label:
          default: S3 reference data
        Parameters:
          - BucketName
          - BucketPrefix
          - BucketRegion
    ParameterLabels:
      SSMParameterValue:
        default: Value from master template
      ChildTemplate:
        default: The Stack we are going to run
      BucketName:
        default: S3 bucket name
      BucketPrefix:
        default: S3 Key Prefix
      BucketRegion:
        default: S3 bucket region
Parameters:
  SSMParameterValue:
    Description: The value we want to store in Systems Manager Parameter Store
    Type: String
  ChildTemplate:
    AllowedValues:
      - "PathStyle-1"
      - "PathStyle-2"
      - "VirtualHostedStyle-1"
    Default: "PathStyle-1"
    Description: This is the test template we wish to run.
    Type: String
  BucketName:
    AllowedPattern: "^[0-9a-zA-Z]+([0-9a-zA-Z-]*[0-9a-zA-Z])*$"
    ConstraintDescription: >-
      The bucket name can include numbers, lowercase letters, uppercase
      letters, and hyphens (-). It cannot start or end with a hyphen (-).
    Default: "mybucket"
    Description: >-
      S3 bucket name for the s3 assets. The bucket name can
      include numbers, lowercase letters, uppercase letters, and hyphens (-). It
      cannot start or end with a hyphen (-).
    Type: String
  BucketPrefix:
    AllowedPattern: "^[0-9a-zA-Z-/]*$"
    ConstraintDescription:
      The key prefix can include numbers, lowercase letters,
      uppercase letters, hyphens (-), and forward slash (/).
    Default: sigv2-to-sigv4/
    Description: S3 key prefix for the s3 assets. The key prefix
      can include numbers, lowercase letters, uppercase letters, hyphens (-), and
      forward slash (/).
    Type: String
  BucketRegion:
    Default: "us-east-1"
    Description: "The AWS Region where the S3 bucket (BucketName) is hosted."
    Type: String

Conditions:
  GovCloudCondition: !Equals
    - !Ref AWS::Region
    - us-gov-west-1
  UsingDefaultBucket: !Equals [!Ref BucketName, "mybucket"]
  ChildTemplate1Condition: !Equals
    - !Ref ChildTemplate
    - "PathStyle-1"
  ChildTemplate2Condition: !Equals
    - !Ref ChildTemplate
    - "PathStyle-2"
  ChildTemplate3Condition: !Equals
    - !Ref ChildTemplate
    - "VirtualHostedStyle-1"
Resources:
  PathStyleStack1:
    # Path-Style endpoint no region specified
    Condition: ChildTemplate1Condition
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub "https://s3.amazonaws.com/${BucketName}/${BucketPrefix}templates/template.yaml"
      Parameters:
        SSMParameterValue: !Ref "SSMParameterValue"
  PathStyleStack2:
    # Path-Style endpoint with specified region
    Condition: ChildTemplate2Condition
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub
        - "https://${S3Region}.amazonaws.com/${BucketName}/${BucketPrefix}templates/template.yaml"
        - S3Region: !If [GovCloudCondition, s3-us-gov-west-1, s3.us-west-2]
      Parameters:
        SSMParameterValue: !Ref "SSMParameterValue"
  VirtualHostedStyleStack3:
    # Virtual Hosted-Style
    Condition: ChildTemplate3Condition
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub
        - https://${BucketName}.s3.${S3Region}.${AWS::URLSuffix}/${BucketPrefix}templates/template.yaml
        - S3Region:
            !If [UsingDefaultBucket, !Ref "AWS::Region", !Ref BucketRegion]
      Parameters:
        SSMParameterValue: !Ref "SSMParameterValue"