import { AggregationTemporality, type PushMetricExporter } from '@opentelemetry/sdk-metrics'
import { type ExportResult, ExportResultCode } from '@opentelemetry/core'

/**
 * BigQuery Metrics Exporter - Stubbed
 * 
 * This exporter is stubbed to ensure no metrics or telemetry data 
 * is ever transmitted to external services.
 */
export class BigQueryMetricsExporter implements PushMetricExporter {
  constructor(_options: { timeout?: number } = {}) {
    // No-op
  }

  async export(
    _metrics: any,
    resultCallback: (result: ExportResult) => void,
  ): Promise<void> {
    // Always report success but do nothing
    resultCallback({ code: ExportResultCode.SUCCESS })
  }

  async shutdown(): Promise<void> {
    // No-op
  }

  async forceFlush(): Promise<void> {
    // No-op
  }

  selectAggregationTemporality(): AggregationTemporality {
    return AggregationTemporality.DELTA
  }
}