/* ═══════════════════════════════════════════════════════════════
   public/js/buildings/1v1.js
   Vollstaendige Spielfeld-Logik fuer das 1v1-Battlefield.
   EJS-Variablen kommen aus window.GAME_CONFIG (in der EJS gesetzt).
═══════════════════════════════════════════════════════════════ */

/* ── Konfiguration aus EJS-Bridge ────────────────────────── */
const matchId =
  new URLSearchParams(window.location.search).get("match") ||
  window.GAME_CONFIG.matchId;
const mySlot =
  new URLSearchParams(window.location.search).get("slot") ||
  window.GAME_CONFIG.mySlot;
const amIPlayer1 = mySlot === "player1";

/* ── Gegner-Name aus URL setzen ──────────────────────────── */
const _urlParams = new URLSearchParams(window.location.search);
const opponentNameFromUrl = _urlParams.get("opponent");
if (opponentNameFromUrl) {
  const oppEl = document.getElementById(amIPlayer1 ? "nameRight" : "nameLeft");
  if (oppEl) oppEl.textContent = decodeURIComponent(opponentNameFromUrl);
}

/* ═══════════════════════════════════════════════════════════
   SPIELFELD AUFBAUEN
═══════════════════════════════════════════════════════════ */
["row1", "row2"].forEach((rowId) => {
  const row = document.getElementById(rowId);
  for (let i = 1; i <= 11; i++) {
    const s = document.createElement("div");
    s.className = "card-slot";
    s.dataset.row = rowId;
    s.dataset.slotIndex = i;
    s.id = `${rowId}-slot-${i}`;
    s.innerHTML =
      '<span class="slot-icon">\u2736</span><span class="slot-num">' +
      i +
      "</span>";
    row.appendChild(s);
  }
});

const hand = document.getElementById("handArea");

/* ── Deck-Stapel ─────────────────────────────────────────── */
const deckSlot = document.createElement("div");
deckSlot.className = "hand-slot hand-slot-deck";
deckSlot.id = "deck-stack";
deckSlot.title = "Dein Deck";
deckSlot.innerHTML = `
  <div class="deck-stack-wrap">
    <img class="deck-card-back deck-shadow-3" src="/images/items/rueckseite.png">
    <img class="deck-card-back deck-shadow-2" src="/images/items/rueckseite.png">
    <img class="deck-card-back deck-shadow-1" src="/images/items/rueckseite.png">
    <img class="deck-card-top"                src="/images/items/rueckseite.png">
  </div>
  <span class="deck-count" id="deck-count">\u2014</span>`;
hand.appendChild(deckSlot);

/* ── Hand-Karten-Slots ───────────────────────────────────── */
const handCardIds = [
  "hand-card-1",
  "hand-card-2",
  "hand-card-3",
  "hand-card-4",
  "hand-card-5",
  "hand-card-6",
  "hand-card-7",
];
handCardIds.forEach((id) => {
  const s = document.createElement("div");
  s.className = "hand-slot hand-slot-card";
  s.id = id;
  s.innerHTML = '<span class="hs-icon">\uD83C\uDCCF</span>';
  hand.appendChild(s);
});

/* ═══════════════════════════════════════════════════════════
   HAND & DECK SYSTEM
═══════════════════════════════════════════════════════════ */
let deckQueue = [];
const handSlotState = {};
handCardIds.forEach((id) => {
  handSlotState[id] = null;
});

/* ── SVG-Icons ───────────────────────────────────────────── */
const SVG_RANGE = `<svg viewBox="0 0 16 16" width="10" height="10" style="display:inline;vertical-align:middle;flex-shrink:0" fill="none" stroke="#e8b84b" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 2 Q1 8 4 14"/><line x1="4" y1="2" x2="4" y2="14" stroke-width="0.7" stroke-dasharray="2,1.5"/><line x1="4" y1="8" x2="13" y2="8"/><polyline points="11,6 13,8 11,10"/><line x1="5" y1="7" x2="4" y2="8"/><line x1="5" y1="9" x2="4" y2="8"/></svg>`;
const SVG_RACE = `<svg viewBox="0 0 16 16" width="10" height="10" style="display:inline;vertical-align:middle;flex-shrink:0" fill="none" stroke="#7de87d" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="9" cy="2.5" r="1.4" fill="#7de87d" stroke="none"/><line x1="9" y1="4" x2="8" y2="9"/><line x1="8" y1="9" x2="10" y2="14"/><line x1="8" y1="9" x2="6" y2="13"/><line x1="8.5" y1="5.5" x2="11" y2="8"/><line x1="8.5" y1="5.5" x2="6" y2="7"/></svg>`;

/* ── Hand-Slot rendern ───────────────────────────────────── */
function renderHandSlot(id) {
  const slot = document.getElementById(id);
  const state = handSlotState[id];
  if (!slot) return;

  slot.innerHTML = "";
  slot.style.backgroundImage = "none";
  slot.style.opacity = "1";
  slot.style.filter = "none";
  slot.style.backgroundColor = "#0a0805";
  slot.classList.remove("hand-slot-ready", "hand-slot--filled");

  if (!state) {
    slot.innerHTML = '<span class="hs-icon">\uD83C\uDCCF</span>';
    slot.draggable = false;
    delete slot.dataset.cardSlotId;
    return;
  }

  const { card, currentCd } = state;
  const isReady = currentCd <= 0;

  const atkVal = card.attack ?? null;
  const defVal = card.defends ?? null;
  const rngVal = card.range ?? null;
  const rceVal = card.race ?? null;

  const statsHtml = `<div class="card-stat-overlay">
    ${atkVal != null ? `<span class="cs-atk">${atkVal}</span>` : ""}
    ${defVal != null ? `<span class="cs-def">${defVal}</span>` : ""}
    ${card.cooldown != null ? `<span class="cs-cd ${isReady ? "cs-cd-ready" : ""}">${isReady ? "\u2713" : currentCd}</span>` : ""}
    ${rngVal != null ? `<span class="cs-range">${SVG_RANGE}&thinsp;${rngVal}</span>` : ""}
    ${rceVal != null ? `<span class="cs-race">${SVG_RACE}&thinsp;${rceVal}</span>` : ""}
  </div>`;

  const readyBadge =
    isReady && isMyTurn
      ? '<div class="hand-slot-ready-badge">SPIELEN</div>'
      : "";

  slot.innerHTML = card.image
    ? `<img class="hand-card-img" src="/images/cards/${card.image}" onerror="this.src='/images/items/rueckseite.png'" title="${card.name}">${statsHtml}${readyBadge}`
    : `<div style="width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-family:Cinzel,serif;">
         <span style="font-size:18px;">\u2694\uFE0F</span>
         <span style="font-size:9px;color:#f0d9a6;text-align:center;">${card.name}</span>
       </div>${statsHtml}${readyBadge}`;

  slot.classList.toggle("hand-slot-ready", isReady);
  slot.classList.add("hand-slot--filled");

  if (isReady && isMyTurn) {
    slot.draggable = true;
    slot.dataset.cardSlotId = id;
  } else {
    slot.draggable = false;
    delete slot.dataset.cardSlotId;
  }
}

function setHandSlot(id, card) {
  handSlotState[id] = {
    card,
    currentCd: card.cooldown ?? 0,
    wasReduced: false,
  };
  renderHandSlot(id);
}

function drawNextCard() {
  if (deckQueue.length === 0) return;
  const freeSlot = handCardIds.find((id) => handSlotState[id] === null);
  if (!freeSlot) return;
  const card = deckQueue.shift();
  setHandSlot(freeSlot, card);
  const countEl = document.getElementById("deck-count");
  if (countEl) countEl.textContent = deckQueue.length;
}

function tickHandCooldowns() {
  handCardIds.forEach((id) => {
    const state = handSlotState[id];
    if (!state) return;
    const baseCd = Number(state.card.cooldown || 0);
    if (state.currentCd <= 0 && !state.wasReduced) {
      state.currentCd = baseCd > 0 ? Math.max(1, Math.floor(baseCd / 2)) : 0;
      state.wasReduced = true;
    } else if (state.currentCd > 0) {
      state.currentCd--;
    }
    renderHandSlot(id);
  });
}

/* ── Deck laden ──────────────────────────────────────────── */
(async () => {
  try {
    const urlP = new URLSearchParams(window.location.search);
    const deckId = urlP.get("deck") || sessionStorage.getItem("selectedDeckId");
    if (!deckId) return;
    const res = await fetch("/api/decks/" + deckId + "/cards");
    if (!res.ok) return;
    const cards = await res.json();

    const expanded = [];
    cards.forEach((c) => {
      for (let i = 0; i < (c.amount ?? 1); i++) expanded.push(c);
    });
    for (let i = expanded.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [expanded[i], expanded[j]] = [expanded[j], expanded[i]];
    }
    for (let i = 0; i < 3; i++) {
      if (expanded[i]) setHandSlot(handCardIds[i], expanded[i]);
    }
    deckQueue = expanded.slice(3);
    const countEl = document.getElementById("deck-count");
    if (countEl) countEl.textContent = deckQueue.length;
  } catch (e) {
    console.error("[Battlefield] Deck laden:", e);
  }
})();

/* ═══════════════════════════════════════════════════════════
   ZUG-TIMER
═══════════════════════════════════════════════════════════ */
const TURN_SECONDS = 30;
const TT_CIRCUM = 2 * Math.PI * 18;
let turnTimerInt = null;
let turnSecsLeft = TURN_SECONDS;
let amILeftPlayer = null;
let isMyTurn = false;

function startTurnTimer(activeName) {
  clearInterval(turnTimerInt);
  turnSecsLeft = TURN_SECONDS;
  updateTimerUI(turnSecsLeft, activeName);
  const wrap = document.getElementById("turn-timer-wrap");
  if (wrap) wrap.style.display = "flex";
  turnTimerInt = setInterval(() => {
    turnSecsLeft--;
    updateTimerUI(turnSecsLeft, activeName);
    if (turnSecsLeft <= 0) {
      clearInterval(turnTimerInt);
      if (isMyTurn) endMyTurn();
    }
  }, 1000);
}

function stopTurnTimer() {
  clearInterval(turnTimerInt);
  const wrap = document.getElementById("turn-timer-wrap");
  if (wrap) wrap.style.display = "none";
}

function updateTimerUI(secs, activeName) {
  const num = document.getElementById("turn-timer-num");
  const circle = document.getElementById("tt-circle");
  const wrap = document.getElementById("turn-timer-wrap");
  if (num) num.textContent = secs;
  if (wrap && activeName) wrap.title = activeName + " ist am Zug";
  if (circle) {
    circle.style.strokeDashoffset = TT_CIRCUM * (1 - secs / TURN_SECONDS);
    circle.style.stroke =
      secs > 15 ? "#27ae60" : secs > 8 ? "#f39c12" : "#e74c3c";
    if (secs <= 8) {
      num.style.color = "#e74c3c";
      num.style.animation = "tt-pulse 0.5s ease-in-out infinite";
    } else {
      num.style.color = "#fff";
      num.style.animation = "none";
    }
  }
}

/* ═══════════════════════════════════════════════════════════
   ZUG-SYSTEM
═══════════════════════════════════════════════════════════ */
function setTurnState(myTurn, activeName) {
  isMyTurn = myTurn;
  const btn = document.getElementById("end-turn-btn");
  if (!btn) return;
  handCardIds.forEach((id) => renderHandSlot(id));
  if (myTurn) {
    btn.disabled = false;
    btn.textContent = "Zug beenden";
    btn.style.opacity = "1";
    document.getElementById("turn-indicator")?.remove();
    startTurnTimer(activeName || "Du");
  } else {
    btn.disabled = true;
    btn.style.opacity = "0.4";
    showTurnIndicator(activeName);
    startTurnTimer(activeName || "Gegner");
  }
}

function showTurnIndicator(activeName) {
  document.getElementById("turn-indicator")?.remove();
  const ind = document.createElement("div");
  ind.id = "turn-indicator";
  ind.style.cssText = `
    position:fixed;bottom:calc(var(--s)*200);left:50%;transform:translateX(-50%);
    background:linear-gradient(135deg,rgba(20,20,40,0.95),rgba(10,10,25,0.95));
    border:1px solid rgba(200,160,60,0.5);border-radius:calc(var(--s)*8);
    color:rgba(255,215,80,0.75);font-family:'Cinzel',serif;
    font-size:calc(var(--s)*11);letter-spacing:calc(var(--s)*3);
    padding:calc(var(--s)*8) calc(var(--s)*20);z-index:100;pointer-events:none;
    text-transform:uppercase;box-shadow:0 4px 20px rgba(0,0,0,0.6);`;
  ind.textContent = activeName
    ? `\u23F3  ${activeName} ist am Zug`
    : "\u23F3  Gegner ist am Zug";
  document.body.appendChild(ind);
}

function endMyTurn() {
  if (!isMyTurn) return;
  clearInterval(turnTimerInt);
  stopTurnTimer();
  setTurnState(false);
  tickHandCooldowns();
  drawNextCard();
  socket.emit("end_turn", { matchId, slot: mySlot });
}

document.getElementById("end-turn-btn")?.addEventListener("click", endMyTurn);

/* ═══════════════════════════════════════════════════════════
   KARTE AUF BOARD RENDERN
═══════════════════════════════════════════════════════════ */

/*
 * boardState speichert jetzt: { [slotId]: { card, owner } }
 *   card  = Karten-Objekt mit aktuellen Werten (defends wird live verändert)
 *   owner = 'player1' | 'player2'
 */
const boardState = {};

/* ── Kampf + HP Animationen ────────────────────────────── */
(function () {
  const s = document.createElement("style");
  s.textContent = `
    @keyframes dmg-float {
      0%   { opacity:1; transform:translateX(-50%) translateY(0); }
      100% { opacity:0; transform:translateX(-50%) translateY(-44px); }
    }
    @keyframes combat-fade {
      from { opacity:0; transform:translateX(-50%) scale(0.9); }
      to   { opacity:1; transform:translateX(-50%) scale(1); }
    }
  `;
  document.head.appendChild(s);
})();

/* ── Spieler-Farbe auf Slot oder Avatar anwenden ────────────────── */
function applyOwnerStyle(el, owner) {
  if (!el || !owner) return;
  const isLeft = owner === (window._leftSlot || "player1");
  if (isLeft) {
    el.style.borderColor = "rgba(60, 140, 255, 0.95)";
    el.style.boxShadow =
      "0 0 14px rgba(60, 140, 255, 0.5), inset 0 0 10px rgba(60,140,255,0.08)";
  } else {
    el.style.borderColor = "rgba(220, 60, 60, 0.95)";
    el.style.boxShadow =
      "0 0 14px rgba(220, 60, 60, 0.5), inset 0 0 10px rgba(220,60,60,0.08)";
  }
}

function buildStatsHtml(card) {
  const atk = card.attack ?? null;
  const def = card.defends ?? null;
  const cd = card.cooldown ?? null;
  const rng = card.range ?? null;
  const rce = card.race ?? null;
  return `<div class="card-stat-overlay">
    ${atk != null ? `<span class="cs-atk">${atk}</span>` : ""}
    ${def != null ? `<span class="cs-def">${def}</span>` : ""}
    ${cd != null ? `<span class="cs-cd">${cd}</span>` : ""}
    ${rng != null ? `<span class="cs-range">${SVG_RANGE}&thinsp;${rng}</span>` : ""}
    ${rce != null ? `<span class="cs-race">${SVG_RACE}&thinsp;${rce}</span>` : ""}
  </div>`;
}

function renderCardOnBoard(slotEl, card, owner) {
  const statsHtml = buildStatsHtml(card);
  slotEl.classList.add("slot-occupied");
  applyOwnerStyle(slotEl, owner);
  slotEl.innerHTML = card.image
    ? `<img src="/images/cards/${card.image}" onerror="this.src='/images/items/rueckseite.png'" title="${card.name}" style="width:100%;height:100%;object-fit:cover;border-radius:7px;display:block;">${statsHtml}`
    : `<div style="display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:4px;font-family:Cinzel,serif;padding:4px;"><span style="font-size:18px;">\u2694\uFE0F</span><span style="font-size:9px;color:#f0d9a6;text-align:center;">${card.name}</span></div>${statsHtml}`;
}

function renderCardInSlot(slot, card) {
  if (!slot || !card) return;
  slot.classList.add("slot-occupied");
  slot.innerHTML = card.image
    ? `<img src="/images/cards/${card.image}" onerror="this.src='/images/items/rueckseite.png'" title="${card.name}" style="width:100%;height:100%;object-fit:cover;border-radius:7px;display:block;">${buildStatsHtml(card)}`
    : `<div style="display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:4px;font-family:Cinzel,serif;padding:4px;"><span style="font-size:18px;">\u2694\uFE0F</span><span style="font-size:9px;color:#f0d9a6;text-align:center;">${card.name}</span></div>${buildStatsHtml(card)}`;
}

/* Slot leeren (nach Tod oder Bewegung) */
function clearBoardSlot(slotId) {
  delete boardState[slotId];
  const el = document.getElementById(slotId);
  if (!el) return;
  el.classList.remove("slot-occupied");
  el.style.borderColor = "";
  el.style.boxShadow = "";
  el.innerHTML =
    '<span class="slot-icon">\u2736</span><span class="slot-num">' +
    slotId.split("-slot-")[1] +
    "</span>";
}

/* ═══════════════════════════════════════════════════════════
   SOCKET & ARENA-JOIN
═══════════════════════════════════════════════════════════ */
const socket = io();
let myIngameName = null;

function emitArenaJoin(me) {
  myIngameName =
    (me && (me.ingame_name || me.username || me.name || String(me.id))) ||
    "Spieler";
  const myNameEl = document.getElementById(
    amIPlayer1 ? "nameLeft" : "nameRight",
  );
  if (myNameEl) myNameEl.textContent = myIngameName;
  console.log("[1v1] emitArenaJoin:", {
    matchId,
    slot: mySlot,
    name: myIngameName,
  });
  socket.emit("arena_join", {
    matchId,
    slot: mySlot,
    accountId: me?.id ?? null,
    playerName: myIngameName,
  });
}

function fetchAndJoin() {
  fetch("/arena/me")
    .then((r) => r.json())
    .then((me) => emitArenaJoin(me))
    .catch(() => {
      console.warn("[1v1] /arena/me fehlgeschlagen");
      emitArenaJoin(null);
    });
}
fetchAndJoin();

socket.on("connect", () => {
  console.log("[1v1] Socket connected:", socket.id);
  if (myIngameName && myIngameName !== "Spieler") {
    socket.emit("arena_join", {
      matchId,
      slot: mySlot,
      accountId: null,
      playerName: myIngameName,
    });
  } else {
    fetchAndJoin();
  }
});

socket.on("connect_error", (err) =>
  console.error("[1v1] connect_error:", err.message),
);

const readyFallbackTimer = setTimeout(() => {
  console.warn("[1v1] Kein arena-Event nach 10s");
  document.getElementById("connecting-overlay")?.remove();
  const lo = document.getElementById("board-lock-overlay");
  if (lo) lo.style.display = "flex";
}, 10000);

/* ── Board-Sync ──────────────────────────────────────────── */
/*
 * boardSync-Einträge müssen vom Server nun { boardSlot, card, owner } enthalten.
 * Ältere Sync-Daten ohne owner werden als gegnerisch behandelt (Fallback).
 */
function applyBoardSync(cards) {
  if (!cards || !cards.length) return;
  cards.forEach((cd) => {
    const slotEl = document.getElementById(cd.boardSlot);
    if (!slotEl || boardState[cd.boardSlot]) return;
    const owner = cd.owner ?? cd.slot ?? "unknown";
    boardState[cd.boardSlot] = { card: cd.card, owner };
    renderCardOnBoard(slotEl, cd.card, cd.owner);
  });
  console.log("[1v1] Board sync:", cards.length, "Karten");
}

/* ── Socket Events ───────────────────────────────────────── */
socket.on("arena_opponent_joined", (data) => {
  console.log("[Arena] arena_opponent_joined:", data);
  clearTimeout(readyFallbackTimer);
  document.getElementById(amIPlayer1 ? "nameRight" : "nameLeft").textContent =
    data.name || "Gegner";
  document.getElementById("connecting-overlay")?.remove();
  const lo = document.getElementById("board-lock-overlay");
  if (lo) lo.style.display = "flex";
});

socket.on("arena_ready", (data) => {
  console.log("[Arena] arena_ready:", data);
  clearTimeout(readyFallbackTimer);
  document.getElementById("connecting-overlay")?.remove();
  if (data.boardSync) applyBoardSync(data.boardSync);
  if (data.hp && data.maxHp) applyHpFromEvent(data);

  const oppName = amIPlayer1 ? data.player2 : data.player1;
  const oppEl = document.getElementById(amIPlayer1 ? "nameRight" : "nameLeft");
  const urlOppName = _urlParams.get("opponent");
  if (
    oppEl &&
    oppName &&
    !["Spieler", "Spieler 1", "Spieler 2", "Gegner"].includes(oppName)
  ) {
    oppEl.textContent = oppName;
  } else if (
    oppEl &&
    urlOppName &&
    (!oppEl.textContent || oppEl.textContent === "Gegner")
  ) {
    oppEl.textContent = decodeURIComponent(urlOppName);
  }
  const myEl = document.getElementById(amIPlayer1 ? "nameLeft" : "nameRight");
  if (myEl && myIngameName) myEl.textContent = myIngameName;
  const lo = document.getElementById("board-lock-overlay");
  if (lo) lo.style.display = "flex";
});

socket.on("board_sync", (data) => {
  if (data.cards) applyBoardSync(data.cards);
});

socket.on("turn_change", (data) => {
  document.getElementById("board-lock-overlay")?.remove();
  document.getElementById("connecting-overlay")?.remove();
  if (data.boardSync) applyBoardSync(data.boardSync);
  const activeSlot = data.activeSlot;
  const nowMyTurn = activeSlot === mySlot;
  const activeNameEl = document.getElementById(
    activeSlot === (window._leftSlot || "player1") ? "nameLeft" : "nameRight",
  );
  const activeName = activeNameEl?.textContent || (nowMyTurn ? "Du" : "Gegner");
  console.log(`[1v1] turn_change: ${activeSlot} | meinZug: ${nowMyTurn}`);
  setTurnState(nowMyTurn, activeName);
  if (data.hp && data.maxHp) applyHpFromEvent(data);
});

socket.on("turn_started", (data) => {
  const myT = data.slot === mySlot;
  const nameEl = document.getElementById(
    data.slot === (window._leftSlot || "player1") ? "nameLeft" : "nameRight",
  );
  setTurnState(myT, nameEl?.textContent || (myT ? "Du" : "Gegner"));
});

/* ═══════════════════════════════════════════════════════════
   BEREIT-SYSTEM
═══════════════════════════════════════════════════════════ */
let myReady = false;

function handleBereit() {
  if (myReady) return;
  myReady = true;
  const btn = document.getElementById("bereit-btn");
  btn.textContent = "\u2714 BEREIT";
  btn.classList.add("bereit-clicked");
  btn.disabled = true;
  socket.emit("player_ready", { matchId, slot: mySlot });
}

const CIRCUMFERENCE = 2 * Math.PI * 34;
const timerCircle = document.getElementById("timer-circle");
if (timerCircle) timerCircle.style.strokeDasharray = CIRCUMFERENCE;

socket.on("ready_timer", (data) => {
  const num = document.getElementById("ready-timer-number");
  if (num) num.textContent = data.remaining;
  if (timerCircle) {
    timerCircle.style.strokeDashoffset =
      CIRCUMFERENCE * (1 - data.remaining / 30);
    timerCircle.style.stroke =
      data.remaining > 15
        ? "#27ae60"
        : data.remaining > 7
          ? "#f39c12"
          : "#e74c3c";
  }
});

socket.on("ready_status", (data) => {
  console.log("[1v1] ready_status:", data);
  const pip1 = document.getElementById("pip-player1");
  const pip2 = document.getElementById("pip-player2");
  if (data.readySlots) {
    if (data.readySlots.includes("player1") && pip1)
      pip1.textContent =
        "\u2705 " +
        (document.getElementById("nameLeft")?.textContent || "Spieler 1");
    if (data.readySlots.includes("player2") && pip2)
      pip2.textContent =
        "\u2705 " +
        (document.getElementById("nameRight")?.textContent || "Spieler 2");
  }

  if (data.readyCount === 2) {
    const seed = matchId.split("").reduce((a, c) => a + c.charCodeAt(0), 0);
    const flip = seed % 2 === 1;
    const myName = myIngameName || "Spieler";
    const oppEl = document.getElementById(
      amIPlayer1 ? "nameRight" : "nameLeft",
    );
    const oppName = oppEl?.textContent || "Gegner";
    const p1Name = amIPlayer1 ? myName : oppName;
    const p2Name = amIPlayer1 ? oppName : myName;
    const leftName = flip ? p2Name : p1Name;
    const rightName = flip ? p1Name : p2Name;

    document.getElementById("nameLeft").textContent = leftName;
    document.getElementById("nameRight").textContent = rightName;

    ["avLeft", "avRight"].forEach((avId) => {
      const av = document.getElementById(avId);
      const ph = av?.querySelector(".av-placeholder");
      const name = avId === "avLeft" ? leftName : rightName;
      if (ph)
        ph.innerHTML = `<div style="font-family:'Cinzel',serif;font-size:calc(var(--s)*13);font-weight:700;color:#ffd750;text-align:center;padding:0 8px;word-break:break-word;line-height:1.4;text-shadow:0 2px 8px rgba(0,0,0,0.9)">${name}</div>`;
    });

    document.getElementById("board-lock-overlay")?.remove();
    amILeftPlayer = flip ? mySlot === "player2" : mySlot === "player1";

    // Avatare farbig umranden: links=blau, rechts=rot
    const _avL = document.getElementById("avLeft");
    const _avR = document.getElementById("avRight");
    if (_avL) {
      _avL.style.borderColor = "rgba(60, 140, 255, 0.95)";
      _avL.style.boxShadow =
        "0 0 28px rgba(60, 140, 255, 0.55), inset 0 0 20px rgba(0,0,0,0.5)";
    }
    if (_avR) {
      _avR.style.borderColor = "rgba(220, 60, 60, 0.95)";
      _avR.style.boxShadow =
        "0 0 28px rgba(220, 60, 60, 0.55), inset 0 0 20px rgba(0,0,0,0.5)";
    }

    const board = document.querySelector(".board");
    if (board) {
      board.classList.remove("my-side-left", "my-side-right");
      board.classList.add(amILeftPlayer ? "my-side-left" : "my-side-right");
    }

    const leftSlot = flip ? "player2" : "player1";
    window._leftSlot = leftSlot;
    console.log(`[1v1] linker Slot: ${leftSlot} | ich: ${mySlot}`);

    // Bereits auf dem Board liegende Karten jetzt korrekt einfärben
    // (boardSync kann vor _leftSlot ankommen)
    Object.entries(boardState).forEach(([slotId, entry]) => {
      const el = document.getElementById(slotId);
      if (el && entry?.owner) applyOwnerStyle(el, entry.owner);
    });
    if (mySlot === "player1") {
      socket.emit("start_turn_request", { matchId, starterSlot: leftSlot });
    }
  }
});

/* ═══════════════════════════════════════════════════════════
   DRAG & DROP
═══════════════════════════════════════════════════════════ */
function isMyZone(slotIndex) {
  const idx = Number(slotIndex);
  const iAmLeft = amILeftPlayer !== null ? amILeftPlayer : amIPlayer1;
  return iAmLeft ? idx <= 3 : idx >= 9;
}

function setDropZones(active) {
  document.querySelectorAll(".card-slot").forEach((slot) => {
    const idx = Number(slot.dataset.slotIndex);
    if (!isMyZone(idx)) return;
    if (active && !boardState[slot.id]) slot.classList.add("drop-zone-active");
    else slot.classList.remove("drop-zone-active", "drop-zone-hover");
  });
}

let draggedCardSlotId = null;

document.getElementById("handArea").addEventListener("dragstart", (e) => {
  const slot = e.target.closest("[data-card-slot-id]");
  if (!slot || !isMyTurn) {
    e.preventDefault();
    return;
  }
  draggedCardSlotId = slot.dataset.cardSlotId;
  slot.classList.add("dragging");
  e.dataTransfer.effectAllowed = "move";
  e.dataTransfer.setData("text/plain", draggedCardSlotId);
  setTimeout(() => setDropZones(true), 0);
});

document.getElementById("handArea").addEventListener("dragend", (e) => {
  const slot = e.target.closest("[data-card-slot-id]");
  if (slot) slot.classList.remove("dragging");
  setDropZones(false);
  draggedCardSlotId = null;
});

["row1", "row2"].forEach((rowId) => {
  const row = document.getElementById(rowId);

  row.addEventListener("dragover", (e) => {
    const slot = e.target.closest(".card-slot");
    if (!slot) return;
    const idx = Number(slot.dataset.slotIndex);
    if (!isMyZone(idx) || boardState[slot.id]) return;
    e.preventDefault();
    e.dataTransfer.dropEffect = "move";
    row
      .querySelectorAll(".drop-zone-hover")
      .forEach((s) => s.classList.remove("drop-zone-hover"));
    slot.classList.add("drop-zone-hover");
  });

  row.addEventListener("dragleave", (e) => {
    const slot = e.target.closest(".card-slot");
    if (slot) slot.classList.remove("drop-zone-hover");
  });

  row.addEventListener("drop", (e) => {
    e.preventDefault();
    const slot = e.target.closest(".card-slot");
    if (!slot) return;
    const idx = Number(slot.dataset.slotIndex);
    if (!isMyZone(idx) || boardState[slot.id]) return;
    const sourceId = draggedCardSlotId || e.dataTransfer.getData("text/plain");
    if (!sourceId) return;
    const cardState = handSlotState[sourceId];
    if (!cardState || cardState.currentCd > 0) return;

    handSlotState[sourceId] = null;
    renderHandSlot(sourceId);

    /* ── boardState mit owner speichern ─────────────────── */
    boardState[slot.id] = { card: cardState.card, owner: mySlot };
    renderCardOnBoard(slot, cardState.card, mySlot);
    slot.classList.remove("drop-zone-active", "drop-zone-hover");

    socket.emit("card_played", {
      matchId,
      slot: mySlot,
      boardSlot: slot.id,
      row: slot.dataset.row,
      slotIndex: idx,
      card: cardState.card,
    });
    console.log(`[1v1] Karte gespielt: ${cardState.card.name} -> ${slot.id}`);
  });
});

socket.on("card_played", (data) => {
  if (data.slot === mySlot) return;
  if (boardState[data.boardSlot]) return;
  const slotEl = document.getElementById(data.boardSlot);
  if (!slotEl) {
    console.warn("[1v1] card_played: Slot fehlt:", data.boardSlot);
    return;
  }

  /* ── boardState mit owner des Gegners speichern ─────── */
  boardState[data.boardSlot] = { card: data.card, owner: data.slot };
  renderCardOnBoard(slotEl, data.card, data.slot);
  console.log("[1v1] Gegner Karte:", data.card?.name, "->", data.boardSlot);
});

/* ═══════════════════════════════════════════════════════════
   KAMPFPHASE – CLIENT-SEITIGE VERARBEITUNG
   Der Server sendet nach end_turn ein 'combat_phase'-Event mit:
     { events: [...], finalBoard: [...] }
═══════════════════════════════════════════════════════════ */

/* Timing (ms) zwischen einzelnen Kampf-Events */
const COMBAT_DELAY_MOVE = 350;
const COMBAT_DELAY_ATTACK = 450;
const COMBAT_DELAY_DIE = 300;

/* Kampf-Log-Banner (erscheint kurz über dem Board) */
function showCombatBanner(text, color = "#f0d060") {
  const old = document.getElementById("combat-banner");
  if (old) old.remove();
  const el = document.createElement("div");
  el.id = "combat-banner";
  el.style.cssText = `
    position:fixed;top:18%;left:50%;transform:translateX(-50%);
    background:rgba(10,8,5,0.92);border:1px solid ${color};
    border-radius:8px;padding:7px 22px;
    color:${color};font-family:'Cinzel',serif;font-size:12px;
    letter-spacing:2px;z-index:500;pointer-events:none;
    animation:combat-fade 0.25s ease;`;
  el.textContent = text;
  document.body.appendChild(el);
  setTimeout(() => el.remove(), 1600);
}

/* Kurzes Aufleuchten eines Slots (Angriff / Tod) */
function flashSlot(slotId, color, durationMs = 300) {
  const el = document.getElementById(slotId);
  if (!el) return;
  el.style.transition = `box-shadow ${durationMs / 2}ms ease`;
  el.style.boxShadow = `0 0 18px 6px ${color}`;
  setTimeout(() => {
    el.style.boxShadow = "";
  }, durationMs);
}

/* Karte bewegen: Slot A → Slot B */
function applyMoveEvent(ev) {
  const entry = boardState[ev.from];
  if (!entry) return;

  const fromEl = document.getElementById(ev.from);
  const toEl = document.getElementById(ev.to);
  if (!fromEl || !toEl) return;

  /* boardState aktualisieren */
  delete boardState[ev.from];
  boardState[ev.to] = entry;

  /* DOM aktualisieren */
  fromEl.classList.remove("slot-occupied");
  fromEl.innerHTML =
    '<span class="slot-icon">\u2736</span><span class="slot-num">' +
    ev.from.split("-slot-")[1] +
    "</span>";

  renderCardOnBoard(toEl, entry.card, entry.owner);

  console.log(`[Combat] Bewegt: ${entry.card.name} ${ev.from} → ${ev.to}`);
}

/* Angriff: Verteidigung des Ziels aktualisieren */
function applyAttackEvent(ev) {
  const attackerEntry = boardState[ev.from];
  const targetEntry = boardState[ev.to];
  if (!attackerEntry || !targetEntry) return;

  /* Verteidigung im boardState aktualisieren */
  targetEntry.card = { ...targetEntry.card, defends: ev.remainingDef };

  /* Visuelles Feedback */
  flashSlot(ev.from, "rgba(255,200,50,0.7)", 250); // Angreifer leuchtet gold
  flashSlot(ev.to, "rgba(220,50,50,0.85)", 350); // Ziel leuchtet rot

  /* Verteidigungswert im DOM sofort aktualisieren */
  const targetEl = document.getElementById(ev.to);
  if (targetEl) {
    const defEl = targetEl.querySelector(".cs-def");
    if (defEl) {
      defEl.textContent = ev.remainingDef;
      defEl.style.color = ev.remainingDef <= 2 ? "#e74c3c" : "";
    }
  }

  console.log(
    `[Combat] Angriff: ${attackerEntry.card.name} → ${targetEntry.card.name} (${ev.damage} Schaden, verbleibend: ${ev.remainingDef})`,
  );
}

/* Karte stirbt */
function applyDieEvent(ev) {
  const entry = boardState[ev.slotId];
  const name = entry?.card?.name ?? "???";

  flashSlot(ev.slotId, "rgba(200,50,50,0.9)", 500);

  setTimeout(() => {
    clearBoardSlot(ev.slotId);
    console.log(`[Combat] Gestorben: ${name} auf ${ev.slotId}`);
  }, 200);
}

/* Finales Board nach Kampfphase vollständig anwenden (Sicherheits-Sync) */
function applyFinalBoard(finalBoard) {
  /* Erst alles leeren */
  Object.keys(boardState).forEach((sid) => clearBoardSlot(sid));

  /* Dann neuen Zustand setzen */
  if (!finalBoard || !finalBoard.length) return;
  finalBoard.forEach((entry) => {
    const slotEl = document.getElementById(entry.boardSlot);
    if (!slotEl) return;
    boardState[entry.boardSlot] = { card: entry.card, owner: entry.owner };
    renderCardOnBoard(slotEl, entry.card, entry.owner);
  });
}

/* Haupt-Handler für combat_phase */
socket.on("combat_phase", (data) => {
  const events = data.events ?? [];
  const finalBoard = data.finalBoard ?? [];

  console.log(`[Combat] Kampfphase startet: ${events.length} Events`);
  showCombatBanner("\u2694\uFE0F  KAMPFPHASE");

  if (events.length === 0) {
    /* Keine Karten im Spiel → direkt final sync */
    applyFinalBoard(finalBoard);
    return;
  }

  /* Events sequenziell abarbeiten */
  let delay = 600; // kurze Pause nach Banner

  events.forEach((ev) => {
    const thisDelay = delay;

    if (ev.type === "move") {
      delay += COMBAT_DELAY_MOVE;
      setTimeout(() => applyMoveEvent(ev), thisDelay);
    } else if (ev.type === "attack") {
      delay += COMBAT_DELAY_ATTACK;
      setTimeout(() => applyAttackEvent(ev), thisDelay);
    } else if (ev.type === "die") {
      delay += COMBAT_DELAY_DIE;
      setTimeout(() => applyDieEvent(ev), thisDelay);
    }
  });

  /* Nach allen Events → finaler Sync (stellt sicher dass alles stimmt) */
  delay += 500;
  setTimeout(() => {
    applyFinalBoard(finalBoard);
    console.log("[Combat] Kampfphase abgeschlossen, Board synchronisiert.");
  }, delay);
});

/* ═══════════════════════════════════════════════════════════
   AVATAR HP – Anzeige & Animationen
═══════════════════════════════════════════════════════════ */

function updateHpDisplay(slot, currentHp, maxHp) {
  const isLeft = slot === (window._leftSlot || "player1");
  const orbEl = document.getElementById(isLeft ? "orbLeft" : "orbRight");
  const hpEl = document.getElementById(isLeft ? "hpLeft" : "hpRight");
  const avEl = document.getElementById(isLeft ? "avLeft" : "avRight");

  if (orbEl) orbEl.textContent = currentHp;
  if (hpEl) hpEl.textContent = currentHp;

  /* Farbe je nach HP-Prozent */
  const pct = maxHp > 0 ? currentHp / maxHp : 0;
  const color = pct > 0.5 ? "#e74c3c" : pct > 0.25 ? "#e67e22" : "#8b0000";
  if (orbEl) {
    orbEl.style.background = `radial-gradient(circle at 40% 35%, ${color}, #3a0000)`;
    orbEl.style.boxShadow = `0 0 12px ${color}cc`;
  }

  /* Avatar-Schüttelanimation + roter Flash */
  if (avEl) {
    avEl.style.transition = "transform 0.07s ease";
    avEl.style.transform = "scale(1.07)";
    setTimeout(() => {
      avEl.style.transform = "scale(0.96)";
    }, 70);
    setTimeout(() => {
      avEl.style.transform = "";
    }, 150);

    const flash = document.createElement("div");
    flash.style.cssText =
      "position:absolute;inset:0;border-radius:inherit;background:rgba(220,50,50,0.4);z-index:20;pointer-events:none;";
    avEl.appendChild(flash);
    setTimeout(() => flash.remove(), 320);
  }
}

function applyHpFromEvent(data) {
  if (!data.hp || !data.maxHp) return;
  ["player1", "player2"].forEach((slot) => {
    if (data.hp[slot] != null)
      updateHpDisplay(slot, data.hp[slot], data.maxHp[slot] ?? data.hp[slot]);
  });
}

/* Initiale HP beim Spielstart */
socket.on("hp_init", (data) => {
  applyHpFromEvent(data);
  console.log("[HP] Init:", data.hp);
});

/* Avatar getroffen */
socket.on("avatar_damaged", (data) => {
  const { slot, damage, remainingHp, maxHp } = data;
  updateHpDisplay(slot, remainingHp, maxHp);
  console.log(`[HP] ${slot} -${damage} → ${remainingHp}/${maxHp}`);

  /* Schadens-Zahl einblenden */
  const isLeft = slot === (window._leftSlot || "player1");
  const avEl = document.getElementById(isLeft ? "avLeft" : "avRight");
  if (avEl) {
    const dmg = document.createElement("div");
    dmg.textContent = `-${damage}`;
    dmg.style.cssText = `
      position:absolute;top:15%;left:50%;transform:translateX(-50%);
      font-family:'Cinzel',serif;font-size:calc(var(--s)*24);font-weight:700;
      color:#e74c3c;text-shadow:0 2px 10px rgba(0,0,0,0.95);
      pointer-events:none;z-index:30;
      animation:dmg-float 1s ease forwards;`;
    avEl.appendChild(dmg);
    setTimeout(() => dmg.remove(), 1000);
  }
});

/* ═══════════════════════════════════════════════════════════
   AUFGEBEN
═══════════════════════════════════════════════════════════ */
function closeToArena() {
  if (window.parent && window.parent !== window) {
    window.parent.document.getElementById("arena-backdrop")?.remove();
    window.parent.document.getElementById("arena-popup")?.remove();
  } else {
    window.location.href = "/launcher";
  }
}

function handleAufgeben() {
  const modal = document.createElement("div");
  modal.id = "surrender-modal";
  modal.style.cssText =
    "position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.8);display:flex;align-items:center;justify-content:center;";
  modal.innerHTML = `
    <div style="background:linear-gradient(#2a1a08,#1a0f04);border:2px solid #c8960c;border-radius:14px;padding:32px 40px;text-align:center;max-width:360px;box-shadow:0 20px 60px rgba(0,0,0,0.9);font-family:'Cinzel',serif;">
      <div style="font-size:40px;margin-bottom:12px;">\uD83C\uDFF3\uFE0F</div>
      <div style="font-size:18px;color:#f0d060;letter-spacing:3px;margin-bottom:10px;">AUFGEBEN?</div>
      <p style="color:#a08060;font-size:12px;line-height:1.7;margin-bottom:24px;">Willst du wirklich aufgeben?<br>Du erh\u00E4ltst <strong style="color:#e74c3c;">keine Punkte</strong> f\u00FCr dieses Match.</p>
      <div style="display:flex;gap:12px;justify-content:center;">
        <button id="surrender-no"  style="padding:10px 24px;background:linear-gradient(#1a4a18,#0f2a0e);border:2px solid #4a8a3c;border-radius:8px;color:#a0e090;font-family:'Cinzel',serif;font-size:12px;cursor:pointer;">\u2716 Weiterk\u00E4mpfen</button>
        <button id="surrender-yes" style="padding:10px 24px;background:linear-gradient(#4a1010,#2a0808);border:2px solid #8a3030;border-radius:8px;color:#e07070;font-family:'Cinzel',serif;font-size:12px;cursor:pointer;">\uD83C\uDFF3 Aufgeben</button>
      </div>
    </div>`;
  document.body.appendChild(modal);
  document
    .getElementById("surrender-no")
    .addEventListener("click", () => modal.remove());
  document.getElementById("surrender-yes").addEventListener("click", () => {
    modal.remove();
    socket.emit("player_surrender", { matchId, slot: mySlot });
    showSurrenderMessage(false);
  });
}

function showSurrenderMessage(iWon) {
  const overlay = document.createElement("div");
  overlay.id = "surrender-result-overlay";
  overlay.style.cssText =
    "position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,0.92);display:flex;flex-direction:column;align-items:center;justify-content:center;font-family:'Cinzel',serif;animation:fadeIn 0.4s ease;";
  overlay.innerHTML = iWon
    ? `<div style="font-size:64px;margin-bottom:20px;">\uD83C\uDFC6</div>
       <div style="font-size:34px;color:#f0d060;letter-spacing:6px;margin-bottom:12px;">SIEG!</div>
       <div style="font-size:16px;color:#a0d090;letter-spacing:2px;margin-bottom:6px;">Dein Gegner hat aufgegeben.</div>
       <div style="font-size:12px;color:#606060;margin-bottom:32px;">Du erh\u00E4ltst die Arena-Punkte.</div>
       <button id="surrender-close-btn" style="background:linear-gradient(135deg,#1a5a18,#27ae60);border:2px solid rgba(100,220,100,0.6);border-radius:10px;color:#fff;font-family:'Cinzel',serif;font-size:14px;letter-spacing:3px;padding:12px 36px;cursor:pointer;">\u2714 WEITER</button>`
    : `<div style="font-size:64px;margin-bottom:20px;opacity:0.7;">\uD83C\uDFF3\uFE0F</div>
       <div style="font-size:34px;color:#e74c3c;letter-spacing:6px;margin-bottom:12px;">AUFGEGEBEN</div>
       <div style="font-size:16px;color:#a08060;letter-spacing:2px;margin-bottom:6px;">Du hast das Match aufgegeben.</div>
       <div style="font-size:12px;color:#606060;margin-bottom:32px;">Keine Punkte f\u00FCr dieses Match.</div>
       <button id="surrender-close-btn" style="background:linear-gradient(135deg,#3a2810,#2a1a08);border:2px solid rgba(200,150,60,0.5);border-radius:10px;color:#c8a860;font-family:'Cinzel',serif;font-size:14px;letter-spacing:3px;padding:12px 36px;cursor:pointer;">\u2190 ZUR\u00DCCK ZUR ARENA</button>`;
  document.body.appendChild(overlay);
  document
    .getElementById("surrender-close-btn")
    .addEventListener("click", closeToArena);
  setTimeout(closeToArena, 8000);
}

socket.on("player_surrendered", (data) => {
  if (data.slot !== mySlot) showSurrenderMessage(true);
});

/* ═══════════════════════════════════════════════════════════
   MATCH-ERGEBNIS OVERLAY
═══════════════════════════════════════════════════════════ */
function showResultOverlay(won, data) {
  const overlay = document.getElementById("match-result-overlay");
  const titleEl = document.getElementById("result-title");
  const pointsEl = document.getElementById("result-points");
  titleEl.textContent = won ? "\u2694\uFE0F SIEG!" : "\uD83D\uDC80 NIEDERLAGE";
  titleEl.className = "result-title " + (won ? "win" : "lose");
  pointsEl.textContent = "Punkte werden berechnet\u2026";
  overlay.classList.add("show");
  if (data) updateResultWithPoints(data);
}

function updateResultWithPoints(data) {
  /* Verhindert doppeltes Aufrufen */
  if (document.getElementById("match-end-overlay")) return;

  const img = data.won ? "/images/victory.jpeg" : "/images/defeat.jpg";
  const awarded = data.awarded ?? 0;

  /* Fade-in Keyframe einmalig anlegen */
  if (!document.getElementById("_matchEndStyle")) {
    const st = document.createElement("style");
    st.id = "_matchEndStyle";
    st.textContent = `
      @keyframes matchEndFadeIn  { from{opacity:0} to{opacity:1} }
      @keyframes matchPtsSlideUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }`;
    document.head.appendChild(st);
  }

  /* Punkte-Text aufbauen */
  const ptsLine =
    awarded > 0 ? "+" + awarded + " Arena-Punkte" : "Keine Punkte";
  const lvlLine = data.level_up ? "⬆ LEVEL UP! → Level " + data.new_level : "";

  const overlay = document.createElement("div");
  overlay.id = "match-end-overlay";
  overlay.style.cssText =
    "position:fixed;inset:0;z-index:9999;background:#000;animation:matchEndFadeIn 0.5s ease forwards;";
  overlay.innerHTML = `
    <img src="${img}" style="width:100%;height:100%;object-fit:cover;display:block;position:absolute;inset:0;">
    <div style="
      position:absolute;bottom:8%;left:50%;transform:translateX(-50%);
      background:rgba(0,0,0,0.72);border:1px solid rgba(255,215,80,0.5);
      border-radius:12px;padding:16px 36px;text-align:center;
      font-family:'Cinzel',serif;
      animation:matchPtsSlideUp 0.5s ease 0.3s both;">
      <div style="font-size:calc(var(--s)*18);color:#f0d060;letter-spacing:3px;margin-bottom:6px;">${ptsLine}</div>
      ${lvlLine ? `<div style="font-size:calc(var(--s)*13);color:#7de87d;letter-spacing:2px;">${lvlLine}</div>` : ""}
    </div>`;

  document.body.appendChild(overlay);

  /* Aktuellen Punktestand nachladen und anzeigen */
  fetch("/api/points/me")
    .then((r) => r.json())
    .then((me) => {
      const info = overlay.querySelector("div > div:first-child");
      if (info && awarded > 0) {
        info.insertAdjacentHTML(
          "afterend",
          `<div style="font-size:calc(var(--s)*11);color:#a0a0a0;margin-top:4px;">Gesamt: ${me.arena_points} Pts • Level ${me.level}</div>`,
        );
      }
    })
    .catch(() => {});

  /* Nach 3 Sekunden zur Arena weiterleiten */
  setTimeout(() => closeToArena(), 3000);
}

function closePopup() {
  closeToArena();
}

socket.on("match_result", (data) => updateResultWithPoints(data));
socket.on("match_cancelled", () => closePopup());

document
  .getElementById("result-close-btn")
  .addEventListener("click", closePopup);

/* ═══════════════════════════════════════════════════════════
   AVATAR
═══════════════════════════════════════════════════════════ */
function loadAvatar(input, imgId, parentId) {
  const file = input.files[0];
  if (!file) return;
  const r = new FileReader();
  r.onload = (e) => {
    const img = document.getElementById(imgId);
    img.src = e.target.result;
    img.style.display = "block";
    document
      .getElementById(parentId)
      ?.querySelector(".av-placeholder")
      ?.style.setProperty("display", "none");
  };
  r.readAsDataURL(file);
}

/* ═══════════════════════════════════════════════════════════
   EVENT-LISTENER
═══════════════════════════════════════════════════════════ */
document.getElementById("bereit-btn")?.addEventListener("click", handleBereit);
document
  .getElementById("aufgeben-btn")
  ?.addEventListener("click", handleAufgeben);
document
  .getElementById("fileInputLeft")
  ?.addEventListener("change", function () {
    loadAvatar(this, "avImgL", "avLeft");
  });
document
  .getElementById("fileInputRight")
  ?.addEventListener("change", function () {
    loadAvatar(this, "avImgR", "avRight");
  });