import { NestFactory } from '@nestjs/core';
import { ValidationPipe } from '@nestjs/common';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { AppModule } from './app.module';

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

  // Enable CORS for agent access
  app.enableCors({
    origin: '*',
    methods: 'GET,HEAD,PUT,PATCH,POST,DELETE',
    credentials: true,
  });

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

  // Swagger documentation
  const config = new DocumentBuilder()
    .setTitle('Local LLM Agent Gateway')
    .setDescription('OpenAI-compatible API Gateway for local LLM inference')
    .setVersion('0.1.0')
    .addTag('openai', 'OpenAI-compatible endpoints')
    .addTag('mcp', 'MCP Tools endpoints')
    .addTag('health', 'Health check endpoints')
    .build();

  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api', app, document);

  const port = process.env.GATEWAY_PORT || 3160;
  await app.listen(port);

  console.log(`
  ╔════════════════════════════════════════════════════════════╗
  ║           Local LLM Agent Gateway                          ║
  ╠════════════════════════════════════════════════════════════╣
  ║  Status:    Running                                        ║
  ║  Port:      ${port}                                           ║
  ║  Swagger:   http://localhost:${port}/api                      ║
  ╚════════════════════════════════════════════════════════════╝
  `);
}

bootstrap();