import { NodeSDK } from "@opentelemetry/sdk-node";
import { getNodeAutoInstrumentations } from "@opentelemetry/auto-instrumentations-node";
import { PrometheusExporter } from "@opentelemetry/exporter-prometheus";
import { OTLPTraceExporter } from "@opentelemetry/exporter-trace-otlp-http";
import { resourceFromAttributes } from "@opentelemetry/resources";
import { ATTR_SERVICE_NAME } from "@opentelemetry/semantic-conventions";

const prometheusExporter = new PrometheusExporter({ port: 9464 });

const traceExporter = new OTLPTraceExporter({
  url:
    process.env.OTEL_EXPORTER_OTLP_ENDPOINT ??
    "http://tempo.observability.svc:4318/v1/traces",
});

const sdk = new NodeSDK({
  resource: resourceFromAttributes({
    [ATTR_SERVICE_NAME]: "api",
  }),
  metricReader: prometheusExporter,
  traceExporter,
  instrumentations: [
    getNodeAutoInstrumentations({
      "@opentelemetry/instrumentation-fs": { enabled: false },
    }),
  ],
});

sdk.start();

process.on("SIGTERM", () => {
  sdk.shutdown().then(
    () => process.exit(0),
    () => process.exit(1),
  );
});