import HTML from './index.html';

export default {
    async fetch(request) {
        const url = new URL(request.url);
        const path = url.pathname;
        const originalHost = request.headers.get("host");
        const registryHost = "ghcr.io";

        if (path.startsWith("/v2/")) {
            const headers = new Headers(request.headers);
            headers.set("host", registryHost);

            const registryUrl = `https://${registryHost}${path}`;
            const registryRequest = new Request(registryUrl, {
                method: request.method,
                headers: headers,
                body: request.body,
                redirect: "follow",
            });

            const registryResponse = await fetch(registryRequest);
            const responseHeaders = new Headers(registryResponse.headers);
            responseHeaders.set("access-control-allow-origin", originalHost);
            responseHeaders.set("access-control-allow-headers", "Authorization");

            return new Response(registryResponse.body, {
                status: registryResponse.status,
                statusText: registryResponse.statusText,
                headers: responseHeaders,
            });
        } else {
            return new Response(HTML.replace(/{{host}}/g, originalHost), {
                status: 200,
                headers: {
                    "content-type": "text/html"
                }
            });
        }
    }
}