import fs from 'node:fs';
import type { APIContext, APIRoute } from 'astro';
import { getVideoThumbnail, resolveVideo } from '@util/video.ts';

async function handle(context: APIContext, headersOnly = false) {
  const video = await resolveVideo(context.params.name ?? '');
  if (!video) return new Response(null, { status: 404 });

  const thumbnail = await getVideoThumbnail(video);
  if (!thumbnail) return new Response(null, { status: 404 });

  const stats = await fs.promises.stat(thumbnail.path);
  const headers = {
    'Content-Type': thumbnail.contentType,
    'Content-Length': stats.size.toString(),
    'Cache-Control': 'public, max-age=86400'
  };

  if (headersOnly) return new Response(null, { headers });

  const data = await fs.promises.readFile(thumbnail.path);
  return new Response(new Uint8Array(data), { headers });
}

export const HEAD: APIRoute = (context) => handle(context, true);
export const GET: APIRoute = (context) => handle(context);