AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Front SLA Monitor - Tiered Slack alerts for conversation SLA breaches

Parameters:
  FrontApiTokenSecretArn:
    Type: String
    Description: ARN of the Secrets Manager secret containing the Front API token
  SlackBotTokenSecretArn:
    Type: String
    Description: ARN of the Secrets Manager secret containing the Slack bot token
  SlackAlertChannel:
    Type: String
    Description: Slack channel ID for the front-sla-alerts channel
  AdamEmail:
    Type: String
    Default: adam@seahavenind.com
    Description: Email address for Tier 2 escalation
  AckSlaMinutes:
    Type: Number
    Default: 60
    Description: Business minutes before Tier 1 alert (1 hour)
  ActionSlaMinutes:
    Type: Number
    Default: 1440
    Description: Business minutes before Tier 2 alert (1 business day)
  MonitorInboxes:
    Type: String
    Default: "Triage,California,West Coast,Central,East Coast,Vendors"
    Description: Comma-separated inbox names to monitor (empty = all shared)
  StartDate:
    Type: String
    Default: "2026-05-14"
    Description: Date when monitoring begins (YYYY-MM-DD, Eastern time)

Globals:
  Function:
    Runtime: python3.12
    Timeout: 300
    MemorySize: 128
    Architectures:
      - arm64

Resources:
  AlertsTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: front-sla-alerts
      BillingMode: PAY_PER_REQUEST
      AttributeDefinitions:
        - AttributeName: conversationId
          AttributeType: S
      KeySchema:
        - AttributeName: conversationId
          KeyType: HASH
      TimeToLiveSpecification:
        AttributeName: ttl
        Enabled: true

  MonitorLogGroup:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: /aws/lambda/front-sla-monitor
      RetentionInDays: 60

  MonitorFunction:
    Type: AWS::Serverless::Function
    DependsOn: MonitorLogGroup
    Properties:
      FunctionName: front-sla-monitor
      Handler: app.handler
      CodeUri: src/monitor/
      Environment:
        Variables:
          FRONT_SECRET_NAME: !Ref FrontApiTokenSecretArn
          SLACK_SECRET_NAME: !Ref SlackBotTokenSecretArn
          SLACK_ALERT_CHANNEL: !Ref SlackAlertChannel
          ADAM_EMAIL: !Ref AdamEmail
          TABLE_NAME: !Ref AlertsTable
          ACK_SLA_MINUTES: !Ref AckSlaMinutes
          ACTION_SLA_MINUTES: !Ref ActionSlaMinutes
          MONITOR_INBOXES: !Ref MonitorInboxes
          START_DATE: !Ref StartDate
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref AlertsTable
        - Version: '2012-10-17'
          Statement:
            - Effect: Allow
              Action:
                - secretsmanager:GetSecretValue
              Resource:
                - !Ref FrontApiTokenSecretArn
                - !Ref SlackBotTokenSecretArn
      Events:
        SlaCheck:
          Type: Schedule
          Properties:
            Schedule: cron(0/15 12-22 ? * MON-FRI *)
            Description: Check Front conversations for SLA breaches every 15 min during business hours
            Enabled: true

Outputs:
  MonitorFunctionArn:
    Description: Front SLA Monitor Lambda ARN
    Value: !GetAtt MonitorFunction.Arn
  AlertsTableName:
    Description: DynamoDB alerts table name
    Value: !Ref AlertsTable