let polling = true
const blocks = {
  time: { interval: 30 * 1000, lastUpdate: 0, update: updateTime },        // 30s
  weather: { interval: 30 * 60000, lastUpdate: 0, update: updateWeather } // 30min
  // Add more: { interval: X, lastUpdate: 0, update: updateFunction }
};
let lastPoll = 0;

function updateTime() {
  fetch("/time")
    .then(res => res.json())
    .then(data => document.getElementById("time").innerText = data.time);
}

function updateWeather() {
  const city = document.getElementById("city").value;
  fetch(`/weather?city=${encodeURIComponent(city)}`)
    .then(res => res.json())
    .then(data => {
      const weatherBlock = document.getElementById("weather");
      if (!data) weatherBlock.innerText = "Error: Bad city";
      else weatherBlock.innerText = `${data.summary}`;
    });
}

function pollUpdates() {
  if (!polling) return;
  const now = Date.now();
  Object.keys(blocks).forEach(key => {
    const block = blocks[key];
    if (now - block.lastUpdate >= block.interval) {
      block.update();
      block.lastUpdate = now;
    }
  });
  lastPoll = now;
}

function reloadAll() {
  Object.keys(blocks).forEach(key => {
    blocks[key].update();
    blocks[key].lastUpdate = Date.now();
  });
}

// Header controls
document.getElementById("reload").addEventListener("click", reloadAll);
document.getElementById("pause").addEventListener("change", (e) => {
  polling = e.target.checked;
});

// Initial load
reloadAll();
// Poll every 500ms to check intervals (fast enough for 1s updates, light on CPU)
// maybe the 1s updates should be special case, but for now let's keep it simple
setInterval(pollUpdates, 500);