// Copyright 2026 Kat Suricata
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import type { Handle } from '@sveltejs/kit';

export const handle: Handle = async ({ event, resolve }) => {
	const response = await resolve(event);

	// CONTEXT: Long-lived cache for sprite images — filename-based addressing justifies immutable
	if (event.url.pathname.startsWith('/webp/')) {
		response.headers.set('Cache-Control', 'public, max-age=31536000, immutable');
	}

	return response;
};