import 'reflect-metadata';
import { NestFactory } from '@nestjs/core';
import { ValidationPipe } from '@nestjs/common';
import { NestExpressApplication } from '@nestjs/platform-express';
import { extname, join } from 'node:path';
import type { Response } from 'express';
import { AppModule } from './app.module';
import { prepareDatabase } from './prisma/bootstrap';
import { PrismaExceptionFilter } from './prisma/prisma-exception.filter';

// serve-static's bundled `mime` version predates .avif, so it falls back to
// application/octet-stream — browsers still render the image (they sniff
// content), but a strict client or an <img> under some CSPs would not.
const EXTRA_MIME_TYPES: Record<string, string> = {
  '.avif': 'image/avif',
};

async function bootstrap() {
  await prepareDatabase();

  const app = await NestFactory.create<NestExpressApplication>(AppModule);
  app.setGlobalPrefix('api');
  app.useGlobalPipes(new ValidationPipe({ whitelist: true, transform: true }));
  app.useGlobalFilters(new PrismaExceptionFilter());
  app.enableCors();
  // Uploaded files, mounted OUTSIDE the /api prefix so the URLs stored on
  // UploadedFile.url ("/uploads/<name>") resolve directly.
  app.useStaticAssets(process.env.UPLOAD_DIR ?? join(process.cwd(), 'storage', 'uploads'), {
    prefix: '/uploads/',
    index: false,
    dotfiles: 'deny',
    setHeaders: (res: Response, path: string) => {
      const mime = EXTRA_MIME_TYPES[extname(path).toLowerCase()];
      if (mime) res.setHeader('Content-Type', mime);
    },
  });
  const port = Number(process.env.PORT ?? 3000);

  try {
    // Bind all interfaces explicitly so the container is reachable from nginx.
    await app.listen(port, '0.0.0.0');
  } catch (err) {
    if ((err as NodeJS.ErrnoException).code === 'EADDRINUSE') {
      // eslint-disable-next-line no-console
      console.error(
        `\n[api] Port ${port} is already in use. Free it or change API_PORT ` +
          `in the repo-root .env (and PORT in apps/api/.env to match) — the ` +
          `API will not fall back to a different port.\n`,
      );
      process.exit(1);
    }
    throw err;
  }
}
bootstrap();