import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';
import { ValidationPipe } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { NestExpressApplication } from '@nestjs/platform-express';
import { join } from 'path';
import * as fs from 'fs';

async function bootstrap() {
  const app = await NestFactory.create<NestExpressApplication>(AppModule);

  // Ensure uploads directory exists
  const uploadsDir = join(process.cwd(), 'uploads');
  if (!fs.existsSync(uploadsDir)) {
    fs.mkdirSync(uploadsDir, { recursive: true });
  }

  // Serve static assets
  app.useStaticAssets(uploadsDir, {
    prefix: '/uploads/',
  });

  // Enable CORS
  // Use a permissive origin handler so the server echoes the requesting origin
  // This is necessary when `credentials: true` is set (browsers reject wildcard origins)
  app.enableCors({
    origin: (origin, callback) => callback(null, true),
    methods: 'GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS',
    credentials: true,
  });

  // Enable ValidationPipe
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true,
      transform: true,
      forbidNonWhitelisted: true,
    }),
  );

  const configService = app.get(ConfigService);
  const port = configService.get<number>('PORT') || 3001;

  await app.listen(port);
  console.log(`🚀 Application is running on: http://localhost:${port}`);
}
void bootstrap();