import { NestFactory } from '@nestjs/core';
import { ValidationPipe } from '@nestjs/common';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { ConfigService } from '@nestjs/config';
import helmet from 'helmet';
import cookieParser from 'cookie-parser';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  const configService = app.get(ConfigService);

  // Security
  app.use(helmet());
  app.use(cookieParser());
  
  // CORS
  app.enableCors({
    origin: configService.get('CORS_ORIGIN', 'http://localhost:3000'),
    credentials: true,
  });

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

  // Global prefix
  app.setGlobalPrefix('api');

  // Swagger documentation
  if (configService.get('NODE_ENV') !== 'production') {
    const config = new DocumentBuilder()
      .setTitle('Customer Portal API')
      .setDescription('Backend for Frontend API for customer portal')
      .setVersion('1.0')
      .addBearerAuth()
      .addCookieAuth('auth-cookie')
      .build();
    
    const document = SwaggerModule.createDocument(app, config);
    SwaggerModule.setup('api/docs', app, document);
  }

  const port = configService.get('PORT', 4000);
  await app.listen(port);
  
  console.log(`🚀 BFF API running on: http://localhost:${port}/api`);
  if (configService.get('NODE_ENV') !== 'production') {
    console.log(`📚 API Documentation: http://localhost:${port}/api/docs`);
  }
}

bootstrap();