import { generateOGImage } from '@/app/(main)/og/[...slug]/og';
import { metadataImage } from '@/lib/metadata-image';
import type { ImageResponse } from 'next/og';

async function loadAssets(): Promise<
  { name: string; data: Buffer; weight: 400 | 600; style: 'normal' }[]
> {
  const [
    { base64Font: normal },
    { base64Font: mono },
    { base64Font: semibold },
  ] = await Promise.all([
    import('./fonts/geist-regular-otf.json').then((mod) => mod.default || mod),
    import('./fonts/geistmono-regular-otf.json').then(
      (mod) => mod.default || mod,
    ),
    import('./fonts/geist-semibold-otf.json').then((mod) => mod.default || mod),
  ]);

  return [
    {
      name: 'Geist',
      data: Buffer.from(normal, 'base64'),
      weight: 400 as const,
      style: 'normal' as const,
    },
    {
      name: 'Geist Mono',
      data: Buffer.from(mono, 'base64'),
      weight: 400 as const,
      style: 'normal' as const,
    },
    {
      name: 'Geist',
      data: Buffer.from(semibold, 'base64'),
      weight: 600 as const,
      style: 'normal' as const,
    },
  ];
}

export const GET = metadataImage.createAPI(
  async (page): Promise<ImageResponse> => {
    const [fonts] = await Promise.all([loadAssets()]);

    return generateOGImage({
      title: page.data.title,
      description: page.data.description,
      fonts,
    });
  },
);

export function generateStaticParams(): {
  slug: string[];
}[] {
  return metadataImage.generateParams();
}