import { NestFactory } from '@nestjs/core';
import { ValidationPipe, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
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);

  const configService = app.get(ConfigService);

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

  // CORS
  app.enableCors();

  // 全局 API 前缀
  const apiPrefix = configService.get<string>('app.apiPrefix', 'api/v1');
  app.setGlobalPrefix(apiPrefix);

  // Swagger 文档
  const swaggerConfig = new DocumentBuilder()
    .setTitle('Blockchain Service API')
    .setDescription('RWA 区块链基础设施服务 API')
    .setVersion('1.0')
    .addTag('Health', '健康检查')
    .addTag('Balance', '余额查询')
    .addTag('Internal', '内部接口')
    .build();

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

  // Kafka 微服务
  const kafkaBrokers = configService.get<string[]>('kafka.brokers') || ['localhost:9092'];
  const kafkaGroupId = configService.get<string>('kafka.groupId') || 'blockchain-service-group';

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

  // 启动微服务
  await app.startAllMicroservices();
  logger.log('Kafka microservice started');

  // 启动 HTTP 服务
  const port = configService.get<number>('app.port', 3012);
  await app.listen(port);

  logger.log(`Blockchain service is running on port ${port}`);
  logger.log(`Swagger docs available at http://localhost:${port}/api`);
}

bootstrap();
