import api from '../api';

const PING_INTERVAL_MS = 60_000;

let pingTimer: ReturnType<typeof setInterval> | null = null;
let active = false;

async function sendPing() {
  if (document.visibilityState !== 'visible') return;
  try {
    await api.post('/player/presence/ping');
  } catch {
    /* ignore transient network errors */
  }
}

function onVisibilityChange() {
  if (!active) return;
  if (document.visibilityState === 'visible') void sendPing();
}

export function startPresencePing() {
  if (active) return;
  active = true;
  void sendPing();
  pingTimer = setInterval(() => void sendPing(), PING_INTERVAL_MS);
  document.addEventListener('visibilitychange', onVisibilityChange);
}

export function stopPresencePing() {
  active = false;
  if (pingTimer) {
    clearInterval(pingTimer);
    pingTimer = null;
  }
  document.removeEventListener('visibilitychange', onVisibilityChange);
}