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

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

  const configService = app.get(ConfigService);
  const port = configService.get<number>('PORT', 3005);
  const appName = configService.get<string>('APP_NAME', 'reward-service');

  // 全局验证管道
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true,
      forbidNonWhitelisted: true,
      transform: true,
    }),
  );

  // 跨域配置
  app.enableCors();

  // API 前缀
  app.setGlobalPrefix('api/v1');

  // Swagger 配置
  const config = new DocumentBuilder()
    .setTitle('Reward Service API')
    .setDescription('RWA榴莲皇后平台 - 权益奖励微服务 API 文档')
    .setVersion('1.0')
    .addBearerAuth()
    .build();

  const document = SwaggerModule.createDocument(app, config);
  SwaggerModule.setup('api', 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 || 'reward-service-group';

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

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

  await app.listen(port);
  logger.log(`${appName} is running on port ${port}`);
  logger.log(`Swagger documentation available at http://localhost:${port}/api`);
}

bootstrap();
