package aggregate

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

func AggSumRu() Aggregator {
	return &SumRu{}
}

type SumRu struct {
	sum float64
}

var _ Aggregator = (*SumRu)(nil)

func (a *SumRu) Add(record *load.StmtRecord) {
	a.sum += record.SumRRU + record.SumWRU
}

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

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