package aggregate

import (
	"github.com/pingcap-inc/clinic/pkg/ngm/statements/api"
	"github.com/pingcap-inc/clinic/pkg/ngm/statements/load"
)

func AggAvgRuv2() Aggregator {
	return &AvgRuv2{}
}

type AvgRuv2 struct {
	sum float64
	cnt int64
}

var _ Aggregator = (*AvgRu)(nil)

func (a *AvgRuv2) Add(record *load.StmtRecord) {
	a.sum += record.SumRuv2
	a.cnt += record.ExecCount
}

func (a *AvgRuv2) Merge(agg Aggregator) {
	if agg, ok := agg.(*AvgRuv2); ok {
		a.sum += agg.sum
		a.cnt += agg.cnt
	}
}

func (a *AvgRuv2) Output(model *api.Model) {
	if a.cnt > 0 {
		model.AvgRuv2 = a.sum / float64(a.cnt)
	}
}