addEventListener('fetch', event => {
    event.respondWith(handleRequest(event.request));
});

const BYPASS_COOKIES = [
    'betacentralauth_Session',
    'betacentralauth_User'
];

const BYPASS_NAMESPACES = ["Special", "Module", "Especial"];

async function handleRequest(request) {
    if (request.method === "POST") {
        return fetch(request);
    }

    let url = new URL(request.url);
    let uaValue = 'desktop';
    const ua = request.headers.get('user-agent') || '';

    if (/Mobile|Android|Silk|Kindle|BlackBerry|Opera Mini|Opera Mobi/i.test(ua)) {
        uaValue = 'mobile';
    }

    url.searchParams.set('ua', uaValue);

    let bypassCache = false;

    let cookie = request.headers.get('cookie') || '';

    for (const cookieName of BYPASS_COOKIES) {
        if (cookie.includes(cookieName)) {
            bypassCache = true;
            break;
        }
    }

    for (const namespace of BYPASS_NAMESPACES) {
        if (url.pathname.includes(`/wiki/${namespace}:`)) {
            bypassCache = true;
            break;
        }
    }

    if (bypassCache) {
        const response = await fetch(request);
        const responseHeaders = new Headers(response.headers);
        responseHeaders.set('CF-Cache-Status', 'BYPASS');
        return new Response(response.body, {
            status: response.status,
            statusText: response.statusText,
            headers: responseHeaders,
            redirect: "manual"
        });
    }

    const modifiedHeaders = new Headers(request.headers);
    modifiedHeaders.set('User-Agent', `${uaValue}`);

    // Conditional properties for new Request
    const requestProps = {
        method: request.method,
        headers: modifiedHeaders,
        cf: { cacheEverything: true }
    };

    if (request.method !== "GET" && request.method !== "HEAD") {
        requestProps.body = request.body;
    }

    request = new Request(url.toString(), requestProps);

    const originalResponse = await fetch(request);
    const responseHeaders = new Headers(originalResponse.headers);

    responseHeaders.set('Cache-Control', 'public, must-revalidate, max-age=3600, stale-while-revalidate=90');
    responseHeaders.append('Vary', 'User-Agent');

    return new Response(originalResponse.body, {
        status: originalResponse.status,
        statusText: originalResponse.statusText,
        headers: responseHeaders
    });
}