import { NestFactory } from '@nestjs/core';
import { ValidationPipe, Logger } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { NestExpressApplication } from '@nestjs/platform-express';
import { join } from 'path';
import { AppModule } from './app.module';
import * as compression from 'compression';
import { HttpExceptionFilter } from './common/filters/http-exception.filter';

async function bootstrap() {
  const app = await NestFactory.create<NestExpressApplication>(AppModule, {
    logger: ['error', 'warn', 'log', 'debug', 'verbose'],
  });

  // 增加请求体大小限制（支持上传大文件 base64）
  // 1GB 文件编码后约 1.33GB，加上其他字段，设置为 1500mb
  app.useBodyParser('json', { limit: '1500mb' });
  app.useBodyParser('urlencoded', { limit: '1500mb', extended: true });

  const configService = app.get(ConfigService);

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

  // 全局异常过滤器
  app.useGlobalFilters(new HttpExceptionFilter());

  // 启用压缩
  // app.use(compression());

  // CORS
  app.enableCors({
    origin: configService.get('FRONTEND_URL') || 'http://localhost:5173',
    credentials: true,
    methods: 'GET,HEAD,PUT,PATCH,POST,DELETE,OPTIONS',
    allowedHeaders: 'Content-Type, Accept, Authorization',
  });

  // 配置静态文件服务（用于访问上传的文件）
  // 使用绝对路径确保在编译后也能正确找到 uploads 目录
  const uploadsPath = join(__dirname, '..', '..', 'uploads');
  app.useStaticAssets(uploadsPath, {
    prefix: '/uploads/',
  });

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

  const port = configService.get<number>('PORT') || 3000;
  await app.listen(port);

  console.log(`
    ╔═════════════════════════════════════════════════════╗
    ║                                                   ║
    ║     🚀 幼儿阅读教学服务平台后端启动成功             ║
    ║                                                   ║
    ║     📍 Local:   http://localhost:${port}           ║
    ║     📍 API:     http://localhost:${port}/api/v1    ║
    ║     📍 Prisma:  npx prisma studio                  ║
    ║                                                   ║
    ╚═════════════════════════════════════════════════════╝
  `);
}

bootstrap();