import { NestFactory } from '@nestjs/core';
import { ValidationPipe } from '@nestjs/common';
import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
import { NestExpressApplication } from '@nestjs/platform-express';
import { AppModule } from './app.module';
import { GlobalExceptionFilter } from './shared/common/filters';
import { getUploadRoot } from './shared/uploads/upload-paths';

function envFlag(name: string) {
  return ['1', 'true', 'yes', 'on'].includes((process.env[name] ?? '').toLowerCase());
}

function resolveCorsOrigin() {
  const raw = process.env.CORS_ORIGINS?.trim();
  if (raw) {
    return raw
      .split(',')
      .map((origin) => origin.trim())
      .filter(Boolean);
  }
  return process.env.NODE_ENV === 'production' ? false : true;
}

async function bootstrap() {
  const app = await NestFactory.create<NestExpressApplication>(AppModule);
  app.enableShutdownHooks();
  app.useGlobalFilters(new GlobalExceptionFilter());

  app.useStaticAssets(getUploadRoot(), { prefix: '/uploads/' });

  app.setGlobalPrefix('api');
  app.enableCors({ origin: resolveCorsOrigin(), credentials: true });
  app.useGlobalPipes(
    new ValidationPipe({
      whitelist: true,
      transform: true,
      forbidNonWhitelisted: true,
    }),
  );

  const swaggerEnabled = process.env.NODE_ENV !== 'production' || envFlag('ENABLE_SWAGGER');
  if (swaggerEnabled) {
    const config = new DocumentBuilder()
      .setTitle('TheBet365 API')
      .setDescription('足球投注平台 MVP API')
      .setVersion('1.0')
      .addBearerAuth()
      .build();
    SwaggerModule.setup('api/docs', app, SwaggerModule.createDocument(app, config));
  }

  const port = process.env.PORT || 3000;
  await app.listen(port);
  console.log(`API running on http://localhost:${port}`);
  if (swaggerEnabled) {
    console.log(`Swagger docs: http://localhost:${port}/api/docs`);
  }
}

bootstrap();