AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Hello Rails Lambda

Parameters:

  RailsEnv:
    Type: String
    Default: development
    AllowedValues:
      - development
      - test
      - staging
      - production

Resources:

  RailsApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: !Ref RailsEnv
      EndpointConfiguration: REGIONAL
      DefinitionBody:
        swagger: 2.0
        info: { title: !Ref 'AWS::StackName' }
        basePath: !Join [ '', [ '/', !Ref RailsEnv ] ]
        schemes: [ 'https' ]
        paths:
          /:
            x-amazon-apigateway-any-method:
              x-amazon-apigateway-integration:
                uri:
                  Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${RailsFunction.Arn}:live/invocations
                httpMethod: POST
                type: aws_proxy
          /{resource+}:
            x-amazon-apigateway-any-method:
              parameters:
                - name: resource
                  in: path
                  required: true
                  type: string
              x-amazon-apigateway-integration:
                uri:
                  Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${RailsFunction.Arn}:live/invocations
                httpMethod: POST
                type: aws_proxy
        x-amazon-apigateway-binary-media-types:
          - '*/*'

  RailsFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: .
      Handler: app.handler
      Runtime: ruby2.5
      MemorySize: 512
      Timeout: 30
      Environment:
        Variables:
          RAILS_ENV: !Ref RailsEnv
      FunctionName: !Join [ '', [ 'hello-rails-', !Ref RailsEnv, '-', !Ref 'AWS::Region' ] ]
      Events:
        Root:
          Type: Api
          Properties:
            Path: /
            Method: ANY
            RestApiId: !Ref RailsApi
        RailsAppAll:
          Type: Api
          Properties:
            Path: /{resource+}
            Method: ANY
            RestApiId: !Ref RailsApi
      AutoPublishAlias: live

Outputs:

  RailsApiUrl:
    Description: API Gateway Endpoint
    Value: !Sub "https://${RailsApi}.execute-api.${AWS::Region}.amazonaws.com/${RailsEnv}/"

  RailsFunctionArn:
    Description: Lambda Function ARN
    Value: !GetAtt RailsFunction.Arn