package aggregate

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

func AggSumCopTaskNum() Aggregator {
	return &SumCopTaskNum{}
}

type SumCopTaskNum struct {
	sum int64
}

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

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

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