import path from 'node:path';
import type { APIRoute } from 'astro';
import sharp from 'sharp';
import ico from 'sharp-ico';

const faviconSrc = path.resolve('src/images/favicon_icon.png');

export const GET: APIRoute = async () => {
  // Resize the image to multiple sizes
  const sizes = [16, 32];

  const buffers = await Promise.all(
    sizes.map(async (size) => {
      return await sharp(faviconSrc).resize(size).toFormat('png').toBuffer();
    })
  );

  // Convert the image to an ICO file
  const icoBuffer = ico.encode(buffers);

  return new Response(icoBuffer, {
    headers: { 'Content-Type': 'image/x-icon' },
  });
};