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

import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule, {
    bufferLogs: true,
  });

  const logger = new Logger('Bootstrap');
  app.useLogger(logger);

  const configService = app.get(ConfigService);

  const host =
    configService.get<string>('STATS_HOST') ??
    configService.get<string>('HOST') ??
    '0.0.0.0';

  const port =
    configService.get<number>('STATS_PORT') ??
    Number(process.env.STATS_PORT ?? 3302);

  const corsOrigin = configService.get<string>('STATS_CORS_ORIGIN') ?? '*';
  const corsOriginOption =
    corsOrigin === '*'
      ? true
      : corsOrigin
          .split(',')
          .map((o) => o.trim())
          .filter(Boolean);

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

  // 👇 Important: this makes /health become /api/v1/health
  app.setGlobalPrefix('api/v1', {
    exclude: ['/'],
  });

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

  // Setup Swagger (OpenAPI)
  const swaggerConfig = new DocumentBuilder()
    .setTitle('盒子统计接口文档')
    .setDescription(
      'box-stats-api 的公开接口文档，面向前端应用和统计服务。包含用户登录历史等模块。',
    )
    .setVersion('1.0.0')
    .build();

  const swaggerDocument = SwaggerModule.createDocument(app, swaggerConfig);

  SwaggerModule.setup('api-docs', app, swaggerDocument, {
    jsonDocumentUrl: '/api-docs-json',
    swaggerOptions: {
      persistAuthorization: true,
      docExpansion: 'none',
    },
  });

  // Prevent Swagger UI/JSON from being cached (browser + proxies)
  app.use(['/api-docs', '/api-docs-json'], (req, res, next) => {
    res.setHeader(
      'Cache-Control',
      'no-store, no-cache, must-revalidate, proxy-revalidate',
    );
    res.setHeader('Pragma', 'no-cache');
    res.setHeader('Expires', '0');
    next();
  });

  await app.listen(port, host);

  const url = `http://${host}:${port}`;

  logger.log(`🚀 box-stats-api listening on ${url} (global prefix: /api/v1)`);
  logger.log(`📖 Swagger 文档: ${url}/api-docs`);
  logger.log(`📄 Swagger JSON: ${url}/api-docs-json`);
}

bootstrap().catch((error) => {
  // eslint-disable-next-line no-console
  console.error('❌ Failed to bootstrap box-stats-api', error);
  process.exit(1);
});