// Timers. `setTimeout` gives a record, as node does, not an int: an IO handle
// is used again after its op completes, so `clearTimeout` of an old int could
// cancel another op. A record stays the timer's own
//
// Not as the spec says: `setTimeout` takes no args for the callback

import { __native_io_queue_cancel, __native_io_queue_timeout } from "jsrt:native";
import { __pending } from "jsrt:loop";

export function setTimeout(f, ms) {
    // As in node, a delay below 1 ms is 1 ms
    const delay = ms === undefined || !(ms >= 1) ? 1 : ms;
    const timer = { handle: __native_io_queue_timeout(delay), active: true };

    __pending[timer.handle] = (h) => {
        if (!timer.active) return;
        timer.active = false;
        f();
    };

    return timer;
}

export function clearTimeout(timer) {
    if (timer === undefined || timer === null || !timer.active) return;
    timer.active = false;
    __native_io_queue_cancel(timer.handle);
}