/*
 * Copyright The OpenTelemetry Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import * as opentelemetry from "@opentelemetry/sdk-node";
import { diag, DiagConsoleLogger } from "@opentelemetry/api";
import {
  getNodeAutoInstrumentations,
  getResourceDetectors,
} from "@opentelemetry/auto-instrumentations-node";
import { OTLPMetricExporter } from "@opentelemetry/exporter-metrics-otlp-proto";
import { PeriodicExportingMetricReader } from "@opentelemetry/sdk-metrics";

diag.setLogger(
  new DiagConsoleLogger(),
  opentelemetry.core.getEnv().OTEL_LOG_LEVEL,
);

const metricReader = new PeriodicExportingMetricReader({
  exporter: new OTLPMetricExporter(),
  exportIntervalMillis: 10000,
});

const sdk = new opentelemetry.NodeSDK({
  instrumentations: getNodeAutoInstrumentations(),
  resourceDetectors: getResourceDetectors(),
  metricReader,
});

try {
  sdk.start();
  diag.info("OpenTelemetry automatic instrumentation started successfully");
} catch (error) {
  diag.error(
    "Error initializing OpenTelemetry SDK. Your application is not instrumented and will not produce telemetry",
    error,
  );
}

process.on("SIGTERM", () => {
  sdk
    .shutdown()
    .then(() => diag.debug("OpenTelemetry SDK terminated"))
    .catch((error) => diag.error("Error terminating OpenTelemetry SDK", error));
});