export default {
    async fetch(request, env) {
        const url = new URL(request.url);
        
        // --- ZETA CLOAKING CONFIG ---
        const TARGET_CORE = "https://pundiuang369-zeta-sovereign-core.hf.space";
        
        // --- CORS OBLITERATION ---
        const corsHeaders = {
            'Access-Control-Allow-Origin': '*',
            'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
            'Access-Control-Allow-Headers': '*',
        };

        if (request.method === 'OPTIONS') {
            return new Response(null, { headers: corsHeaders });
        }

        // --- STEALTH PROXY ENGINE ---
        // Redirecting all traffic to the Hugging Face Space while masking the URL
        const proxyUrl = new URL(url.pathname + url.search, TARGET_CORE);
        
        const modifiedRequest = new Request(proxyUrl, {
            method: request.method,
            headers: request.headers,
            body: request.body,
            redirect: 'follow'
        });

        try {
            const response = await fetch(modifiedRequest);
            
            // Create a new response so we can modify the headers
            const newResponse = new Response(response.body, response);
            
            // Inject CORS for global accessibility
            Object.keys(corsHeaders).forEach(key => {
                newResponse.headers.set(key, corsHeaders[key]);
            });
            
            // Masking Server Headers for additional stealth
            newResponse.headers.set('Server', 'ZETA-GATEWAY/5.0 (Stealth)');
            newResponse.headers.delete('X-Powered-By');
            
            return newResponse;
        } catch (err) {
            return new Response(`[CRITICAL_FAILURE] Zeta Stealth Gateway collapsed: ${err.message}`, {
                status: 500,
                headers: { 'Content-Type': 'text/plain' }
            });
        }
    }
};