// WebSocket client to broadcast smooth rainbow color changes across the cluster
// Usage: node ws-cluster-broadcast-rainbow.js ws://<device-ip>/ws

const WebSocket = require('ws');

const url = process.argv[2] || 'ws://127.0.0.1/ws';
const ws = new WebSocket(url);

function hsvToRgb(h, s, v) {
  const c = v * s;
  const x = c * (1 - Math.abs(((h / 60) % 2) - 1));
  const m = v - c;
  let r = 0, g = 0, b = 0;
  if (h < 60) { r = c; g = x; b = 0; }
  else if (h < 120) { r = x; g = c; b = 0; }
  else if (h < 180) { r = 0; g = c; b = x; }
  else if (h < 240) { r = 0; g = x; b = c; }
  else if (h < 300) { r = x; g = 0; b = c; }
  else { r = c; g = 0; b = x; }
  const R = Math.round((r + m) * 255);
  const G = Math.round((g + m) * 255);
  const B = Math.round((b + m) * 255);
  return { r: R, g: G, b: B };
}

function toHex({ r, g, b }) {
  const h = (n) => n.toString(16).padStart(2, '0').toUpperCase();
  return `#${h(r)}${h(g)}${h(b)}`;
}

let hue = 0;
const SAT = 1.0;   // full saturation
const VAL = 1.0;   // full value
const BRIGHTNESS = 80;
const UPDATE_RATE = 100; // ms

let timer = null;

ws.on('open', () => {
  console.log('Connected to', url);
  // UPDATE_RATE ms updates (10 Hz). Be aware this can saturate slow links.
  timer = setInterval(() => {
    const rgb = hsvToRgb(hue, SAT, VAL);
    const color = toHex(rgb);
    const envelope = {
      event: 'api/neopattern/color',
      data: { color, brightness: BRIGHTNESS }
    };
    const msg = { event: 'cluster/broadcast', payload: envelope };
    try {
      ws.send(JSON.stringify(msg));
    } catch (_) {}
    hue = (hue + 2) % 360; // advance hue (adjust for speed)
  }, UPDATE_RATE);
});

ws.on('message', (data) => {
  // Optionally throttle logs: comment out for quieter output
  // console.log('WS:', data.toString());
});

ws.on('error', (err) => {
  console.error('WebSocket error:', err.message);
});

ws.on('close', () => {
  if (timer) clearInterval(timer);
  console.log('WebSocket closed');
});