const label = document.getElementById("label");
const eyes = Array.from(document.querySelectorAll(".eye"));
const mouthShape = document.querySelector(".mouth-shape");

let current = "neutral";
let wanderEnabled = true;
let wanderTimer = null;

let talkEnabled = false;
let talkCfg = { rate_hz: 3.2, amount: 0.9, jitter: 0.25 };
let talkTimer = null;

function clamp(v, lo, hi){ return Math.max(lo, Math.min(hi, v)); }

function setEmotion(name) {
  const safe = String(name || "neutral")
    .toLowerCase()
    .replace(/[^a-z0-9_-]/g, "");

  current = safe;
  document.body.className = `emotion-${safe}`;
  label.textContent = safe;

  // surprised -> O-mouth
  if (safe === "surprised") document.body.classList.add("has-omouth");
  else document.body.classList.remove("has-omouth");

  // frown for sad/angry
  if (safe === "sad" || safe === "angry") mouthShape.classList.add("frown");
  else mouthShape.classList.remove("frown");
}

function blinkOnce() {
  eyes.forEach(e => e.classList.add("blink"));
  setTimeout(() => eyes.forEach(e => e.classList.remove("blink")), 120);
}

function setLook(x, y) {
  // x/y in -1..1 -> px offsets
  const pxX = Math.round(clamp(x, -1, 1) * 12);
  const pxY = Math.round(clamp(y, -1, 1) * 10);
  document.documentElement.style.setProperty("--pupil-x", `${pxX}px`);
  document.documentElement.style.setProperty("--pupil-y", `${pxY}px`);
}

function setIntensity(v) {
  const val = clamp(Number(v ?? 0.7), 0, 1);
  document.documentElement.style.setProperty("--intensity", String(val));
}

function setMouthOpen(v) {
  const val = clamp(Number(v ?? 0), 0, 1);
  document.documentElement.style.setProperty("--mouth-open", String(val));
}

function speak(amount = 0.8, durationMs = 600) {
  if (talkEnabled) return; // Talk-Mode steuert Mund
  setMouthOpen(amount);
  setTimeout(() => setMouthOpen(0), Math.max(0, durationMs));
}

function stopTalk() {
  talkEnabled = false;
  if (talkTimer) {
    clearTimeout(talkTimer);
    talkTimer = null;
  }
  setMouthOpen(0);
}

function startTalk(cfg) {
  talkEnabled = true;
  talkCfg = {
    rate_hz: clamp(Number(cfg?.rate_hz ?? 3.2), 0.5, 10),
    amount: clamp(Number(cfg?.amount ?? 0.9), 0, 1),
    jitter: clamp(Number(cfg?.jitter ?? 0.25), 0, 1),
  };

  if (talkTimer) clearTimeout(talkTimer);

  // “sprech”-Animation: Mund öffnet/schließt schnell, mit bisschen Zufall
  const tick = () => {
    if (!talkEnabled) return;

    const base = talkCfg.amount;
    const j = talkCfg.jitter;

    // random-ish open amount between ~0.2..1.0, scaled
    const r = (0.35 + Math.random() * 0.65);
    const open = clamp(base * r * (1 - j + Math.random() * j), 0, 1);
    setMouthOpen(open);

    // timing from rate_hz (Hz -> ms)
    const interval = Math.max(60, Math.round(1000 / talkCfg.rate_hz));
    // add a bit of jitter to cadence
    const next = interval + Math.round((Math.random() * 2 - 1) * interval * 0.25);

    talkTimer = setTimeout(tick, next);
  };

  tick();
}


/* Pupillen-Wandern nur wenn kein look gesetzt ist */
function startWander() {
  if (wanderTimer) clearTimeout(wanderTimer);

  const tick = () => {
    if (!wanderEnabled) return;

    const x = (Math.random() * 2 - 1) * 0.7;
    const y = (Math.random() * 2 - 1) * 0.6;
    setLook(x, y);

    const next = 600 + Math.random() * 900;
    wanderTimer = setTimeout(tick, next);
  };
  tick();
}

function applyState(s) {
  if (!s || typeof s !== "object") return;

  if (s.emotion) setEmotion(s.emotion);
  if (s.intensity !== undefined) setIntensity(s.intensity);

  // one-shot blink
  if (s.blink) blinkOnce();

  // look: if null -> enable wander. if object -> fixed look
  if ("look" in s) {
    if (s.look === null) {
      wanderEnabled = true;
      startWander();
    } else if (typeof s.look === "object") {
      wanderEnabled = false;
      setLook(s.look.x ?? 0, s.look.y ?? 0);
    }
  }

  // mouth command
  if (s.mouth && typeof s.mouth === "object") {
    const open = !!s.mouth.open;
    const amount = clamp(Number(s.mouth.amount ?? 0.8), 0, 1);
    const dur = Number(s.mouth.duration_ms ?? 600);

    if (open) speak(amount, dur);
    else setMouthOpen(0);
  }

  // talk mode
  if (s.talk && typeof s.talk === "object") {
    const enabled = !!s.talk.enabled;
    if (enabled) startTalk(s.talk);
    else stopTalk();
  }
}

function connect() {
  const es = new EventSource("/events");
  es.addEventListener("state", (e) => {
    try { applyState(JSON.parse(e.data)); } catch {}
  });
  es.onmessage = (e) => {
    // fallback: treat as state json
    try { applyState(JSON.parse(e.data)); } catch {}
  };
  es.onerror = () => {
    es.close();
    setTimeout(connect, 1000);
  };
}

connect();
startWander();

/* zufälliges Blinzeln unabhängig vom Push */
(function startBlinkLoop(){
  const loop = () => {
    let base = 3500;
    if (current === "sleepy") base = 2200;
    if (current === "surprised") base = 4200;

    const next = base + Math.random() * 2200;
    setTimeout(() => {
      blinkOnce();
      if (Math.random() < 0.12) setTimeout(blinkOnce, 220);
      loop();
    }, next);
  };
  loop();
})();