apiVersion: core.oam.dev/v1beta1
kind: TraitDefinition
metadata:
  name: autoscale
  namespace: vela-system
  annotations:
    definition.oam.dev/description: "Automatically scales workloads by resource utilization metrics or cron triggers."
spec:
  appliesToWorkloads:
    - webservice
    - worker
  workloadRefPath: spec.workloadRef
  definitionRef:
    name: autoscalers.standard.oam.dev
  podDisruptive: true
  extension:
    install:
      helm:
        repo: kedacore
        name: keda
        url: https://kedacore.github.io/charts
        version: 2.0.0-rc3
  schematic:
    cue:
      template: |
        import "strconv"
        outputs: autoscaler: {{
        	apiVersion: "standard.oam.dev/v1alpha1"
        	kind:       "Autoscaler"
        	spec: {
        		minReplicas: parameter.min
        		maxReplicas: parameter.max
        		if parameter["cpuPercent"] != _|_ && parameter["cron"] != _|_ {
        			triggers: [cpuScaler, cronScaler]
        		}
        		if parameter["cpuPercent"] != _|_ && parameter["cron"] == _|_ {
        			triggers: [cpuScaler]
        		}
        		if parameter["cpuPercent"] == _|_ && parameter["cron"] != _|_ {
        			triggers: [cronScaler]
        		}
        	}
        }}
        cpuScaler: {
        	type: "cpu"
        	condition: {
        		type: "Utilization"
        		if parameter["cpuPercent"] != _|_ {
        			// Temporarily use `strconv` for type converting. This bug will be fixed in kubevela#585
        			value: strconv.FormatInt(parameter.cpuPercent, 10)
        		}
        	}
        }
        cronScaler: {
        	type: "cron"
        	if parameter["cron"] != _|_ && parameter.cron["replicas"] != _|_ {
        		condition: {
        			startAt:  parameter.cron.startAt
        			duration: parameter.cron.duration
        			days:     parameter.cron.days
        			replicas: strconv.FormatInt(parameter.cron.replicas, 10)
        			timezone: parameter.cron.timezone
        		}
        	}
        }
        parameter: {
        	// +usage=Minimal replicas of the workload
        	min: int
        	// +usage=Maximal replicas of the workload
        	max: int
        	// +usage=Specify the value for CPU utilization, like 80, which means 80%
        	// +alias=cpu-percent
        	cpuPercent?: int
        	// +usage=Cron type auto-scaling. Just for `appfile`, not available for Cli usage
        	cron?: {
        		// +usage=The time to start scaling, like `08:00`
        		startAt: string
        		// +usage=For how long the scaling will last
        		duration: string
        		// +usage=Several workdays or weekends, like "Monday, Tuesday"
        		days: string
        		// +usage=The target replicas to be scaled to
        		replicas: int
        		// +usage=Timezone, like "America/Los_Angeles"
        		timezone: string
        	}
        }