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

async function bootstrap() {
  const logger = new Logger('Bootstrap');
  const app = await NestFactory.create(AppModule);

  // Global prefix
  app.setGlobalPrefix('api/v1');

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

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

  // Swagger
  const config = new DocumentBuilder()
    .setTitle('Identity Service API')
    .setDescription('RWA用户身份服务API')
    .setVersion('2.0.0')
    .addBearerAuth()
    .build();
  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api/docs', app, document);

  // Kafka 微服务 - 用于 @MessagePattern 消费消息
  const kafkaBrokers = process.env.KAFKA_BROKERS?.split(',') || [
    'localhost:9092',
  ];
  const kafkaGroupId = process.env.KAFKA_GROUP_ID || 'identity-service-group';

  app.connectMicroservice<MicroserviceOptions>({
    transport: Transport.KAFKA,
    options: {
      client: {
        clientId: 'identity-service',
        brokers: kafkaBrokers,
      },
      consumer: {
        groupId: kafkaGroupId,
      },
    },
  });

  await app.startAllMicroservices();
  logger.log('Kafka microservice started');

  const port = process.env.APP_PORT || 3000;
  await app.listen(port);
  logger.log(`Identity Service is running on port ${port}`);
  logger.log(`Swagger docs: http://localhost:${port}/api/docs`);
}

bootstrap();