import { error, info, success } from "../util/Console.js";
import { runRouterCmds } from "./sshExec.js";

const queue = [];
let running = false;

function enqueue(task) {
    queue.push(task);
    if (!running) processQueue();
}

async function processQueue() {
    if (queue.length === 0) { running = false; return; }
    running = true;
    const t = queue.shift();
    try { await t(); } catch (err) { error('Queue error: ' + String(err)); }
    setImmediate(processQueue);
}

export function enqueueCmd(fn) {
    enqueue(() => fn());
}

export function enqueueNatAdd(ip, port, proto='tcp') {
    enqueue(async () => {
        info(`NAT ADD ${proto} ${ip}:${port}`);
        await runRouterCmds([
            'conf t',
            `ip nat inside source static ${proto} ${ip} ${port} interface ${process.env.ROUTER_WAN_IF || 'gi0'} ${port}`,
            'end',
            'wr mem'
        ]);
        success(`NAT ADDED ${proto} ${ip}:${port}`);
    });
}

export function enqueueNatRemove(ip, port, proto='tcp') {
    enqueue(async () => {
        info(`NAT DEL ${proto} ${ip}:${port}`);
        await runRouterCmds([
            'conf t',
            `no ip nat inside source static ${proto} ${ip} ${port} interface ${process.env.ROUTER_WAN_IF || 'gi0'} ${port}`,
            'end',
            'wr mem'
        ]);
        success(`NAT DELETED ${proto} ${ip}:${port}`);
    });
}