package handler

import (
	"context"

	"github.com/tidbcloud/observability/o11ymetering/pkg/common/constants"
	"github.com/tidbcloud/observability/o11ymetering/pkg/common/models"
	"github.com/tidbcloud/observability/o11ymetering/pkg/facade"
	"github.com/tidbcloud/observability/pkg/common/configs"
)

type ServerlessLokiCollection struct {
	Env constants.BizEnv
}

func (d ServerlessLokiCollection) Build(ctx context.Context, period string) (models.StatisticTask, error) {
	return models.StatisticTask{
		Region:         configs.GetServiceInfo().Region,
		StatisticClass: constants.LogsCollectionLoki,
		MeteringGroup:  constants.Serverless,
		Env:            d.Env,
		Period:         period,
		State:          constants.StatePending,
	}, nil
}

var serverlessQueryMap = map[constants.StatisticName]string{
	constants.LogsLokiEventsCount:          `sum(rate(vector_component_received_events_count_sum{component_type="loki"}[5m]))` + queryByLabels,
	constants.LogsLokiDataTransmittedBytes: `sum(rate(vector_component_received_event_bytes_total{component_type="loki"}[5m]))` + queryByLabels,
}

func (d ServerlessLokiCollection) Execute(ctx context.Context, task models.StatisticTask) ([]*models.StatisticRecord, error) {
	o11yCluster, err := facade.GetO11yMetaQuery().GetServerlessInfraCluster(ctx, d.Env)
	if err != nil {
		return []*models.StatisticRecord{}, err
	}

	var records []*models.StatisticRecord
	for k, query := range serverlessQueryMap {
		resp, err := facade.GetO11yMetricsQuery().QueryO11yMetricsInstant(ctx, configs.GetServiceInfo().Vendor, configs.GetServiceInfo().Region, o11yCluster.ID, convertPeriodToTimestamp(task.Period), query, task.Env)

		if err != nil {
			return nil, err
		}
		records = append(records, convertMetricCollectionRespToRecords(k, constants.Logs, resp, task)...)
	}

	return records, nil
}