AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverlesspresso

Resources:

  MetricsQueueCloudwatch:
    Type: AWS::SQS::Queue
    Properties: 
      QueueName: MetricsQueueCloudwatch
      ReceiveMessageWaitTimeSeconds: 5
      VisibilityTimeout: 30
      SqsManagedSseEnabled: true

  QueuePolicy:
    Type: AWS::SQS::QueuePolicy
    Properties:
      Queues: 
        - !Ref MetricsQueueCloudwatch
      PolicyDocument: 
        Statement:
          -
            Action:
              - SQS:SendMessage
            Effect: Allow
            Resource: !Ref MetricsQueueCloudwatch
            Principal:  
              Service:  "events.amazonaws.com"
            Condition:
              ArnEquals:
                 aws:SourceArn: !Sub "arn:aws:events:${AWS::Region}:${AWS::AccountId}:rule/Serverlesspresso/OrderMetrics-Cloudwatch"

  PublishMetrics:
    Type: AWS::Serverless::Function
    Properties: 
      CodeUri: code/
      Handler: PublishMetrics.handler
      Description: Publish Event Metrics for Serverlesspresso
      Policies:
        - CloudWatchPutMetricPolicy: {}
      MemorySize: 512
      Runtime: nodejs16.x
      ReservedConcurrentExecutions: 1
      Timeout: 30

  PublishMetricsQueueCloudwatchConnector:
    Type: AWS::Serverless::Connector
    Properties:
      Source:
        Id: MetricsQueueCloudwatch
      Destination:
        Id: PublishMetrics
      Permissions:
        - Write
        - Read

  LambdaFunctionEventSourceMapping:
    Type: AWS::Lambda::EventSourceMapping
    Properties:
      BatchSize: 10
      MaximumBatchingWindowInSeconds: 30
      Enabled: true
      EventSourceArn: !GetAtt MetricsQueueCloudwatch.Arn
      FunctionName: !GetAtt PublishMetrics.Arn
      
  EventsLoadTest:
    Type: AWS::Serverless::Function
    Properties: 
      CodeUri: code/
      Handler: EventsLoadTest.handler
      Description: Load test Events for Serverlesspresso
      MemorySize: 512
      Runtime: nodejs16.x
      Timeout: 30

  EventsLoadTestEventsConnector:
    Type: AWS::Serverless::Connector
    Properties:
      Source:
        Id: EventsLoadTest
      Destination:
        Arn: !Sub "arn:aws:events:${AWS::Region}:${AWS::AccountId}:event-bus/Serverlesspresso"
        Type: AWS::Events::EventBus
      Permissions:
        - Write
  MetricsDashboard:
    Type: AWS::CloudWatch::Dashboard
    Properties:
      DashboardName: Serverlesspresso_Metrics
      DashboardBody: '{
    "widgets": [
        {
            "height": 6,
            "width": 8,
            "y": 0,
            "x": 0,
            "type": "metric",
            "properties": {
                "metrics": [
                    [ "Serverlesspresso", "Drink", "Drink", "Cappuccino" ],
                    [ "...", "Espresso" ],
                    [ "...", "Latte" ],
                    [ "...", "Total Orders" ]
                ],
                "sparkline": false,
                "view": "singleValue",
                "region": "us-east-1",
                "stat": "Sum",
                "period": 300
            }
        }
    ]
}'