Mappings:
  DeploymentPreferenceMap:
    prod:
      DeploymentPreference: AllAtOnce
    beta:
      DeploymentPreference: CustomDeployment

Parameters:
  Stage:
    Type: String
    Default: beta
  Deployment:
    Type: String
    Default: AllAtOnce
  Custom:
    Type: String
    Default: CustomDeployment

Conditions:
  MyCondition:
    Fn::Equals:
    - true
    - false

Resources:
  MinimalFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: TestDeploymentConfiguration

  CustomWithFindInMap: # Doesn't work
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !FindInMap [DeploymentPreferenceMap, !Ref Stage, DeploymentPreference]

  CustomWithCondition: # Works
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !If [MyCondition, TestDeploymentConfiguration, AllAtOnce]

  CustomWithCondition2:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !If [MyCondition, !Sub "${Deployment}", !Ref Custom]

  NormalWithSub:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !Sub ${Deployment}

  CustomWithSub:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !Sub ${Custom}

  NormalWithRef:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: s3://sam-demo-bucket/hello.zip
      Handler: hello.handler
      Runtime: python2.7
      AutoPublishAlias: live
      DeploymentPreference:
        Type: !Ref Deployment