package aggregate

import (
	"time"

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

func AggSumRuWaitDuration() Aggregator {
	return &SumRuWaitDuration{}
}

type SumRuWaitDuration struct {
	sum time.Duration
}

var _ Aggregator = (*SumRuWaitDuration)(nil)

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

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

func (a *SumRuWaitDuration) Output(model *api.Model) {
	model.SumRUWaitDuration = int64(a.sum)
}