import { json, error } from '@sveltejs/kit';
import type { RequestHandler } from './$types';
import { presignAudio } from '$lib/server/minio';

/**
 * GET /api/presign/audio?slug=...&n=...&voice=...&speed=...
 * Returns a presigned MinIO URL for the audio file so the browser
 * can stream it directly without going through the server.
 */
export const GET: RequestHandler = async ({ url }) => {
	const slug = url.searchParams.get('slug');
	const n = parseInt(url.searchParams.get('n') ?? '', 10);
	const voice = url.searchParams.get('voice') ?? undefined;
	const speed = parseFloat(url.searchParams.get('speed') ?? '1') || 1;

	if (!slug || !n || n < 1) {
		error(400, 'Missing slug or n');
	}

	try {
		const presignedUrl = await presignAudio(slug, n, voice, speed);
		return json({ url: presignedUrl });
	} catch (e) {
		error(500, `Could not get presigned URL: ${e}`);
	}
};