import { json, error } from '@sveltejs/kit';
import type { RequestHandler } from './$types';
import { env } from '$env/dynamic/public';

// Adv videos are served by the same taobin_image service as menu images.
const ADV_API_BASE = env.PUBLIC_POST_IMAGE;

export const POST: RequestHandler = async ({ request }) => {
	try {
		const formData = await request.formData();

		const country = formData.get('country') as string;
		const uid = formData.get('uid') as string;
		const displayName = formData.get('displayName') as string;
		const email = formData.get('email') as string;
		const file = formData.get('file') as File;
		// 'false' when the manifest is generated on a machine (method 2).
		const regenerate = (formData.get('regenerate') as string) ?? 'true';

		if (!country || !uid || !displayName || !email || !file) {
			throw error(400, 'Missing required fields');
		}

		const endpoint =
			`${ADV_API_BASE}/adv/upload/${encodeURIComponent(country)}/${encodeURIComponent(uid)}/${encodeURIComponent(displayName)}/${encodeURIComponent(email)}` +
			`?regenerate=${encodeURIComponent(regenerate)}`;

		console.log('[Adv Upload Proxy] Endpoint:', endpoint, 'file:', file.name);

		// Upstream expects the multipart field name `files`.
		const uploadFormData = new FormData();
		uploadFormData.append('files', file);

		const response = await fetch(endpoint, {
			method: 'POST',
			body: uploadFormData
		});

		if (!response.ok) {
			const errorData = await response.json().catch(() => ({ detail: response.statusText }));
			throw error(response.status, errorData.detail || 'Upload failed');
		}

		const result = await response.json();
		return json(result);
	} catch (err) {
		console.error('[Adv Upload Proxy] Error:', err);

		if (err && typeof err === 'object' && 'status' in err) {
			throw err;
		}

		throw error(500, err instanceof Error ? err.message : 'Internal server error');
	}
};