import {
  Context,
  APIGatewayProxyEvent,
  APIGatewayProxyResult,
} from 'aws-lambda';
import { bootstrap } from './app';
import * as fastify from 'fastify';
import { proxy } from 'aws-serverless-fastify';

let fastifyServer: fastify.FastifyInstance;

export const handler = async (
  event: APIGatewayProxyEvent,
  context: Context,
): Promise<APIGatewayProxyResult> => {
  if (!fastifyServer) {
    fastifyServer = await bootstrap();
  }
  return await proxy(fastifyServer, event, context);
};

import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import {
  FastifyAdapter,
  NestFastifyApplication,
} from '@nestjs/platform-fastify';
import * as fastify from 'fastify';

export async function bootstrap(): Promise<fastify.FastifyInstance> {
  const serverOptions: fastify.ServerOptionsAsHttp = {
    logger: true,
  };
  const instance: fastify.FastifyInstance = fastify(serverOptions);
  const nestApp = await NestFactory.create<NestFastifyApplication>(
    AppModule,
    new FastifyAdapter(instance),
  );
  nestApp.setGlobalPrefix('api');
  nestApp.enableCors();
  await nestApp.init();
  return instance;
}

import { bootstrap } from './app';

async function startLocal() {
  const fastifyInstance = await bootstrap();
  fastifyInstance.listen(3000);
}

startLocal();