import { NextRequest, NextResponse } from 'next/server';
import * as fs from 'fs';
import * as path from 'path';

// turbopackIgnore: true — IMAGE_DIR är en runtime env-variabel, inte statisk sökväg
const IMAGE_DIR: string = /* turbopackIgnore: true */ (process.env.IMAGE_DIR || '/app/public/images') as string;

export async function GET(
  _request: NextRequest,
  { params }: { params: Promise<{ filename: string }> },
) {
  const { filename } = await params;

  // Förhindra path traversal
  if (!filename || filename.includes('..') || filename.includes('/') || filename.includes('\\')) {
    return new NextResponse('Not found', { status: 404 });
  }

  const filePath = path.join(IMAGE_DIR, filename);

  if (!fs.existsSync(filePath)) {
    return new NextResponse('Not found', { status: 404 });
  }

  const file = fs.readFileSync(filePath);
  return new NextResponse(file, {
    headers: {
      'Content-Type': 'image/jpeg',
      'Cache-Control': 'public, max-age=31536000, immutable',
    },
  });
}