package aggregate

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

func AggMaxRocksdbBlockReadCount() Aggregator {
	return &MaxRocksdbBlockReadCount{}
}

type MaxRocksdbBlockReadCount struct {
	max uint64
}

func (a *MaxRocksdbBlockReadCount) Add(record *load.StmtRecord) {
	if record.MaxRocksdbBlockReadCount > a.max {
		a.max = record.MaxRocksdbBlockReadCount
	}
}

func (a *MaxRocksdbBlockReadCount) Merge(agg Aggregator) {
	if agg, ok := agg.(*MaxRocksdbBlockReadCount); ok {
		if agg.max > a.max {
			a.max = agg.max
		}
	}
}

func (a *MaxRocksdbBlockReadCount) Output(model *api.Model) {
	model.MaxRocksdbBlockReadCount = uint(a.max)
}