'use strict';

// ── WebSocket to server ──────────────────────────────────────────────────────

let ws;
let connected = false;
let sessionActive = false;
let videoActive = false;
let telepresenceActive = false;
let lastSayTx = null;

function connectWS() {
  const proto = location.protocol === 'https:' ? 'wss' : 'ws';
  ws = new WebSocket(`${proto}://${location.host}/ws`);

  ws.onopen = () => {
    connected = true;
  };

  ws.onclose = () => {
    connected = false;
    setStatus(false, 'Disconnected — reconnecting…');
    setTimeout(connectWS, 2000);
  };

  ws.onerror = () => {};

  ws.onmessage = (e) => {
    let msg;
    try { msg = JSON.parse(e.data); } catch { return; }
    handleServerMessage(msg);
  };
}

function handleServerMessage(msg) {
  if (msg.type === 'status') {
    sessionActive = !!msg.sessionID;
    setStatus(msg.connected && sessionActive,
      msg.connected
        ? (sessionActive ? 'Connected  •  ' + msg.sessionID.slice(0, 8) + '…' : 'Connecting…')
        : 'Disconnected');
    return;
  }

  if (msg.type === 'jiboEvent') {
    handleJiboEvent(msg.body, msg.txId);
  }
}

function handleJiboEvent(body, txId) {
  if (!body) return;
  const evt = body.Event || body.ResponseString || '?';
  logEvent(evt, body, txId);
}

// ── REST helpers ─────────────────────────────────────────────────────────────

async function api(method, path, body) {
  try {
    const opts = { method, headers: { 'Content-Type': 'application/json' } };
    if (body) opts.body = JSON.stringify(body);
    const res = await fetch(path, opts);
    return await res.json();
  } catch (err) {
    logEvent('api-error: ' + path, { error: err.message }, null);
  }
}

const post = (path, body) => api('POST', path, body);
const get  = (path)       => api('GET',  path);

// ── Status ───────────────────────────────────────────────────────────────────

function setStatus(ok, label) {
  const dot = document.getElementById('status-dot');
  const lbl = document.getElementById('status-label');
  dot.className = ok ? 'ok' : '';
  lbl.textContent = label;
}

// ── Telepresence Controls ────────────────────────────────────────────────────

document.getElementById('btn-start-telepresence').addEventListener('click', () => {
  const userName = document.getElementById('user-name').value.trim();
  const status = document.getElementById('presence-status').value;

  if (!userName) {
    alert('Please enter your name');
    return;
  }

  telepresenceActive = true;
  document.getElementById('btn-start-telepresence').textContent = '🔴 Broadcasting...';
  document.getElementById('btn-start-telepresence').disabled = true;
  document.getElementById('remote-status').innerHTML = 
    `<strong>${userName}</strong> is now broadcasting (${status})`;

  logEvent('Telepresence Started', { user: userName, status: status }, null);
  post('/api/telepresence/start', { userName, status });
});

// ── Head Navigation ──────────────────────────────────────────────────────────

const STEP_FRAC = 0.30;
const HORIZ_CENTER_Y = 0.38;

let moveGen  = 0;
let moveHeld = false;

async function runMoveLoop(dir, gen) {
  while (moveHeld && gen === moveGen) {
    let pctX, pctY;
    if (dir === 'left')  { pctX = 0.5 - STEP_FRAC; pctY = HORIZ_CENTER_Y; }
    else if (dir === 'right') { pctX = 0.5 + STEP_FRAC; pctY = HORIZ_CENTER_Y; }
    else if (dir === 'up')    { pctX = 0.5; pctY = 0.5 - STEP_FRAC; }
    else                      { pctX = 0.5; pctY = 0.5 + STEP_FRAC; }
    const x = Math.round((1 - pctX) * 640);
    const y = Math.round(pctY * 480);
    await post('/api/look/step', { x, y });
  }
}

function startMove(dir) {
  moveHeld = true;
  runMoveLoop(dir, ++moveGen);
}

function stopMove() {
  moveHeld = false;
}

function addMoveButton(id, dir) {
  const btn = document.getElementById(id);
  if (!btn) return;
  btn.addEventListener('pointerdown',  (e) => { e.preventDefault(); startMove(dir); });
  btn.addEventListener('pointerup',     stopMove);
  btn.addEventListener('pointercancel', stopMove);
  btn.addEventListener('pointerleave',  stopMove);
}

addMoveButton('btn-up',    'up');
addMoveButton('btn-down',  'down');
addMoveButton('btn-left',  'left');
addMoveButton('btn-right', 'right');

// ── Say ───────────────────────────────────────────────────────────────────────

document.getElementById('btn-say').addEventListener('click', async () => {
  const text = document.getElementById('say-text').value.trim();
  if (!text) return;
  const r = await post('/api/say', { text });
  if (r) lastSayTx = r.txId;
});

document.getElementById('btn-say-cancel').addEventListener('click', () => {
  if (lastSayTx) post('/api/cancel', { txId: lastSayTx });
});

// ── Camera / Video ────────────────────────────────────────────────────────────

let videoTxId = null;

document.getElementById('btn-video-start').addEventListener('click', async () => {
  const r = await post('/api/video/start', { duration: 0 });
  if (r) videoTxId = r.txId;
});

document.getElementById('btn-video-stop').addEventListener('click', () => {
  post('/api/video/stop', {});
  stopVideoFeed();
});

function startVideoFeed(uri) {
  const feed = document.getElementById('camera-feed');
  const noFeed = document.getElementById('camera-no-feed');
  feed.src = '/proxy/stream?uri=' + encodeURIComponent(uri);
  feed.style.display = 'block';
  noFeed.style.display = 'none';
  videoActive = true;
}

function stopVideoFeed() {
  const feed = document.getElementById('camera-feed');
  feed.src = '';
  feed.style.display = 'none';
  document.getElementById('camera-no-feed').style.display = '';
  videoActive = false;
}

// ── Volume Control ────────────────────────────────────────────────────────────

document.getElementById('speaker-volume').addEventListener('input', function () {
  document.getElementById('volume-label').textContent =
    Math.round(this.value * 100) + '%';
});

// ── Tabs ──────────────────────────────────────────────────────────────────────

document.querySelectorAll('.tab-btn').forEach(btn => {
  btn.addEventListener('click', function () {
    document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
    document.querySelectorAll('.tab-panel').forEach(p => p.classList.remove('active'));
    this.classList.add('active');
    document.getElementById(this.dataset.tab).classList.add('active');
  });
});

// ── Event log ─────────────────────────────────────────────────────────────────

const MAX_LOG = 200;

function logEvent(eventName, body, txId) {
  const log = document.getElementById('event-log');
  const now = new Date().toLocaleTimeString();

  let cls = 'evt';
  if (eventName.toLowerCase().includes('error')) cls = 'evt-error';

  let detail = '';
  if (body.user) detail = ' [' + body.user + ']';

  const el = document.createElement('div');
  el.className = 'log-entry';
  el.innerHTML = `<span class="ts">${now}</span> <span class="${cls}">${eventName}</span>${detail}`;
  log.prepend(el);

  while (log.children.length > MAX_LOG) log.removeChild(log.lastChild);
}

document.getElementById('btn-clear-log').addEventListener('click', () => {
  document.getElementById('event-log').innerHTML = '';
});

// ── Back to home ──────────────────────────────────────────────────────────────

document.getElementById('btn-back-home')?.addEventListener('click', () => {
  window.location.href = 'index.html';
});

// ── Initialization ────────────────────────────────────────────────────────────

connectWS();