const fetch = require('node-fetch');
const { encrypt } = require('../lib/crypto');

const KEY = "jb%!SZfM%AwwS7JmdM!";
const VERSION = "1.0.9";
const FLAVOUR = "neoRed";
// lupatre.cc: Standard Xtream reseller with all 43 live categories + VOD + Series.
// Master host (37.148.132.86:8080) only serves its internal curation panel, NOT Xtream API.
const TARGET_DOMAIN = "http://lupatre.cc";
const TARGET_USER   = "Emersonadam";
const TARGET_PASS   = "Em25804627";
module.exports = async (req, res) => {
    // Enable CORS
    res.setHeader('Access-Control-Allow-Origin', '*');
    
    const { wifi, lan } = req.query;
    if (!wifi || !lan) {
        return res.status(400).json({ error: "Missing wifi or lan parameters" });
    }

    // Rebuild query using our known-good credentials, not the device's passed username/password.
    // This allows Roku to use placeholder creds; the proxy substitutes they real ones.
    // Build target URL by forwarding all parameters from the incoming request,
    // but overriding username/password with our known-good ones.
    const queryParams = new URLSearchParams(req.query);
    queryParams.set('username', TARGET_USER);
    queryParams.set('password', TARGET_PASS);
    
    // Ensure action is present (it should be coming from Roku)
    let targetUrl = `${TARGET_DOMAIN}/player_api.php?${queryParams.toString()}`;

    try {
        // Prepare Security Headers (Fingerprint)
        const headers = {
            "wifi": encrypt(wifi, KEY),
            "lan": encrypt(lan, KEY),
            "version": encrypt(VERSION, KEY),
            "flavour": encrypt(FLAVOUR, KEY),
            "User-Agent": "UniTV-Android/1.0"
        };

        // 8s timeout — Vercel serverless limit is 10s; leave 2s margin.
        const controller = new AbortController();
        const timeoutId = setTimeout(() => controller.abort(), 8000);

        const response = await fetch(targetUrl, {
            method: 'GET',
            headers: headers,
            signal: controller.signal
        });
        clearTimeout(timeoutId);

        const data = await response.json();
        return res.status(200).json(data);

    } catch (error) {
        console.error("Proxy Error:", error);
        return res.status(500).json({ error: error.message });
    }
};