AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  This template deploys resources that helps make a routing decision whether to add a new contact to the queue or take another action (like terminating the call) based on the queue length and the business hours for that day.

# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 120

Parameters:
  BusinessHoursTable:  # Database table that hosts the configuration
    Type: String
    Default: QueueHours
    Description: Enter a name for a database table that will host the configuration
  ConnectInstanceID: # Amazon Connect Instance
    Type: String
    Default: CONNECT_INSTANCE_ID
    Description: Enter the Amazon Connect InstanceID
  UpdateRate:  #Rate to refresh the configuration from the Amazon Connect Instance
    Type: String
    Default: rate(1 hour)
    Description: Enter the configuration refresh rate, default is 1 hour

Resources:
  GetTimeLeftFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      CodeUri: getTimeLeft/
      Handler: app.lambda_handler
      Runtime: python3.9
      Timeout: 7
      Environment:
        Variables:
          business_hours_table_name: !Ref BusinessHoursTable
      Policies:
        - Version: 2012-10-17
          Statement:
            - Effect: Allow
              Action:
                - dynamodb:GetItem
              Resource:
                'Fn::Join':
                  - ''
                  - - 'arn:aws:dynamodb:'
                    - Ref: AWS::Region
                    - ':'
                    - Ref: AWS::AccountId
                    - ':table/'
                    - Ref: DynamoDBTable

  UpdateQueueHoursFunction:
   Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
   Properties:
    CodeUri: updateQueueHours/
    Handler: app.lambda_handler
    Runtime: python3.9
    Environment:
      Variables:
        business_hours_table_name: !Ref BusinessHoursTable
        connect_instance_id: !Ref ConnectInstanceID
    Events:
      UpdateQueueHoursRate:
        Type: Schedule
        Properties:
          Schedule: !Ref UpdateRate

    Policies:
      - Version: 2012-10-17
        Statement:
          - Effect: Allow
            Action:
              - dynamodb:GetItem
              - dynamodb:PutItem
            Resource:
              'Fn::Join':
                - ''
                - - 'arn:aws:dynamodb:'
                  - Ref: AWS::Region
                  - ':'
                  - Ref: AWS::AccountId
                  - ':table/'
                  - Ref: DynamoDBTable
          - Effect: Allow
            Action:
              - connect:DescribeQueue
              - connect:ListQueues
              - connect:DescribeHoursOfOperation
            Resource:
              'Fn::Join':
                - ''
                - - 'arn:aws:connect:'
                  - Ref: AWS::Region
                  - ':'
                  - Ref: AWS::AccountId
                  - ':instance/'
                  - Ref: ConnectInstanceID
                  - '/*'

  DynamoDBTable:
    Type: AWS::Serverless::SimpleTable
    Properties:
      TableName: !Ref BusinessHoursTable
      PrimaryKey:
        Name: QueueID
        Type: String


Outputs:
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  GetTimeLeftFunction:
    Description: "GetTimeLeft Function ARN"
    Value: !GetAtt  GetTimeLeftFunction.Arn
  UpdateQueueHoursFunction:
    Description: "UpdateQueueHours Function ARN"
    Value: !GetAtt UpdateQueueHoursFunction.Arn
  DynamoDBTable:
    Description: "DynamoDB Table ARN"
    Value: !GetAtt DynamoDBTable.Arn