import { NestFactory } from '@nestjs/core';
import { ValidationPipe, Logger } from '@nestjs/common';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { ConfigService } from '@nestjs/config';
import helmet from 'helmet';
import * as compression from 'compression';
import * as cookieParser from 'cookie-parser';

import { AppModule } from './app.module';

async function bootstrap() {
  const logger = new Logger('Bootstrap');
  
  const app = await NestFactory.create(AppModule);
  const configService = app.get(ConfigService);
  
  // Global prefix for API routes
  app.setGlobalPrefix('api');
  
  // Enable CORS
  app.enableCors({
    origin: configService.get<string>('CORS_ORIGIN', 'http://localhost:3000'),
    credentials: true,
    methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS'],
    allowedHeaders: [
      'Content-Type',
      'Authorization',
      'X-Requested-With',
      'X-CSRF-Token',
      'Accept',
    ],
  });
  
  // Security middleware
  app.use(helmet({
    contentSecurityPolicy: false, // We handle CSP in our custom middleware
    crossOriginEmbedderPolicy: false, // Allow embedding for OAuth
  }));
  
  // Compression middleware
  app.use(compression());
  
  // Cookie parser
  app.use(cookieParser(configService.get<string>('COOKIE_SECRET')));
  
  // Global validation pipe
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true, // Strip unknown properties
      forbidNonWhitelisted: true, // Throw error for unknown properties
      transform: true, // Transform payloads to DTO instances
      disableErrorMessages: process.env.NODE_ENV === 'production',
    }),
  );
  
  // Swagger documentation (development only)
  if (process.env.NODE_ENV !== 'production') {
    const config = new DocumentBuilder()
      .setTitle('SEO Image Renamer API')
      .setDescription('AI-powered bulk image renaming SaaS API')
      .setVersion('1.0')
      .addBearerAuth(
        {
          type: 'http',
          scheme: 'bearer',
          bearerFormat: 'JWT',
          name: 'JWT',
          description: 'Enter JWT token',
          in: 'header',
        },
        'JWT-auth',
      )
      .addTag('Authentication', 'Google OAuth and JWT authentication')
      .addTag('Users', 'User management and profile operations')
      .addTag('Batches', 'Image batch processing')
      .addTag('Images', 'Individual image operations')
      .addTag('Payments', 'Stripe payment processing')
      .build();
      
    const document = SwaggerModule.createDocument(app, config);
    SwaggerModule.setup('api/docs', app, document, {
      customSiteTitle: 'SEO Image Renamer API Documentation',
      customfavIcon: '/favicon.ico',
      customCss: '.swagger-ui .topbar { display: none }',
    });
    
    logger.log('Swagger documentation available at /api/docs');
  }
  
  // Start server
  const port = configService.get<number>('PORT', 3001);
  await app.listen(port);
  
  logger.log(`🚀 SEO Image Renamer API running on port ${port}`);
  logger.log(`📚 Environment: ${process.env.NODE_ENV || 'development'}`);
  
  if (process.env.NODE_ENV !== 'production') {
    logger.log(`📖 API Documentation: http://localhost:${port}/api/docs`);
  }
}

bootstrap().catch((error) => {
  Logger.error('Failed to start application', error);
  process.exit(1);
});