import 'reflect-metadata';
import { NestFactory } from '@nestjs/core';
import { createServer } from 'node:http';
import { MetricsService } from './metrics/metrics.service';
import { SendWorkerModule } from './send-worker.module';

Object.defineProperty(BigInt.prototype, 'toJSON', {
  configurable: true,
  value(this: bigint) {
    const result = Number(this);
    if (!Number.isSafeInteger(result)) throw new RangeError('金额超过 JavaScript 安全整数范围');
    return result;
  },
});

async function bootstrap() {
  if ((process.env.CMPP_PROCESS_ROLE?.trim() || 'worker') !== 'worker') {
    throw new Error('send-worker requires CMPP_PROCESS_ROLE=worker');
  }
  const app = await NestFactory.createApplicationContext(SendWorkerModule);
  app.enableShutdownHooks();
  const metrics = app.get(MetricsService);
  const host = process.env.API_WORKER_METRICS_HOST?.trim() || '127.0.0.1';
  const port = Number(process.env.API_WORKER_METRICS_PORT ?? 9465);
  const metricsServer = createServer((request, response) => {
    if (request.method !== 'GET' || request.url !== '/metrics') {
      response.writeHead(404).end();
      return;
    }
    response.writeHead(200, { 'Content-Type': 'text/plain; version=0.0.4; charset=utf-8', 'Cache-Control': 'no-store' });
    response.end(metrics.render());
  });
  await new Promise<void>((resolve, reject) => {
    metricsServer.once('error', reject);
    metricsServer.listen(port, host, resolve);
  });
  const close = async () => {
    await new Promise<void>((resolve) => metricsServer.close(() => resolve()));
    await app.close();
  };
  process.once('SIGTERM', () => void close());
  process.once('SIGINT', () => void close());
}

void bootstrap();