package aggregate

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

func AggSumBackoffTimes() Aggregator {
	return &SumBackoffTimes{}
}

type SumBackoffTimes struct {
	sum int64
}

func (a *SumBackoffTimes) Add(record *load.StmtRecord) {
	a.sum += record.SumBackoffTimes
}

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

func (a *SumBackoffTimes) Output(model *api.Model) {
	model.SumBackoffTimes = int(a.sum)
}