require("dotenv/config");

const { getConfig } = require("./config");
const { initTracing, shutdownTracing } = require("./observability/tracing");

const config = getConfig();
initTracing(config);

const { buildApp } = require("./app");

async function main() {
  const app = await buildApp();
  app.log.info(
    {
      jobDriver: app.config.jobDriver,
      jobsEnabled: app.config.jobsEnabled,
    },
    "API process started",
  );

  const { host, port } = app.config;
  await app.listen({ host, port });

  let shuttingDown = false;
  const shutdown = async (signal) => {
    if (shuttingDown) return;
    shuttingDown = true;

    app.log.info({ signal }, "Graceful shutdown start");

    const timeoutMs = 10_000;
    const forceTimer = setTimeout(() => {
      app.log.error({ timeoutMs }, "Graceful shutdown timeout, force exit");
      process.exit(1);
    }, timeoutMs);
    forceTimer.unref?.();

    let exitCode = 0;
    try {
      await app.close();
    } catch (error) {
      app.log.error({ err: error }, "Graceful shutdown failed");
      exitCode = 1;
    }

    try {
      await shutdownTracing();
    } catch (error) {
      app.log.error({ err: error }, "OTel shutdown failed");
      exitCode = 1;
    }

    clearTimeout(forceTimer);
    app.log.info({ exitCode }, "Graceful shutdown completed");
    process.exit(exitCode);
  };

  process.on("SIGTERM", () => shutdown("SIGTERM"));
  process.on("SIGINT", () => shutdown("SIGINT"));
}

main().catch(async (err) => {
  // eslint-disable-next-line no-console
  console.error(err);
  try {
    await shutdownTracing();
  } catch {
    // The startup error remains authoritative; shutdown is best effort here.
  }
  process.exit(1);
});