import { ValidationPipe } from '@nestjs/common';
import { NestFactory } from '@nestjs/core';
import type { NestExpressApplication } from '@nestjs/platform-express';
import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
import { randomUUID } from 'crypto';
import { existsSync } from 'fs';
import { join } from 'path';
import { AppModule } from './app.module';
import { HttpExceptionFilter } from './common/filters/http-exception.filter';
import { ResponseInterceptor } from './common/interceptors/response.interceptor';
import type { RequestWithContext } from './common/interfaces/request-with-context.interface';
import { PrismaService } from './prisma/prisma.service';

async function bootstrap() {
  const app = await NestFactory.create<NestExpressApplication>(AppModule);
  const prisma = app.get(PrismaService);

  app.use((req: RequestWithContext, res, next) => {
    req.traceId = req.headers['x-trace-id']?.toString() ?? randomUUID();
    res.setHeader('x-trace-id', req.traceId);
    next();
  });

  app.setGlobalPrefix('api/v1');
  app.useGlobalPipes(
    new ValidationPipe({
      transform: true,
      whitelist: true,
      forbidNonWhitelisted: true,
      transformOptions: {
        enableImplicitConversion: true,
      },
    }),
  );
  app.useGlobalInterceptors(new ResponseInterceptor());
  app.useGlobalFilters(new HttpExceptionFilter());

  const swaggerConfig = new DocumentBuilder()
    .setTitle('ToolsShow Backend API')
    .setDescription('NestJS backend for ToolsShow with hybrid web/download tool access.')
    .setVersion('1.0.0')
    .addBearerAuth(
      {
        type: 'http',
        scheme: 'bearer',
        bearerFormat: 'JWT',
      },
      'admin-access-token',
    )
    .build();
  const document = SwaggerModule.createDocument(app, swaggerConfig);
  SwaggerModule.setup('api/docs', app, document);

  const clientDistPath = process.env.CLIENT_DIST_PATH ?? join(__dirname, '..', 'public');
  if (existsSync(clientDistPath)) {
    app.useStaticAssets(clientDistPath);

    const expressApp = app.getHttpAdapter().getInstance();
    expressApp.get(/^(?!\/api(?:\/|$)).*/, (_req, res) => {
      res.sendFile(join(clientDistPath, 'index.html'));
    });
  }

  await prisma.enableShutdownHooks(app);
  await app.listen(process.env.PORT ?? 3000);
}
bootstrap();