/* ================================
   Kristall-Mapping (aus carddeck.js)
================================ */
const RARITY_CRYSTALS = {
  1: "roter-cristal.png",
  2: "blauer-cristal.png",
  3: "gelber-cristal.png",
  4: "gruener-cristal.png",
  5: "oranger-cristal.png",
  6: "violet-cristal.png",
  7: "pinker-cristal.png",
};

function rarityImgs(rarity, size = 13) {
  const file = RARITY_CRYSTALS[String(rarity)];
  if (!file) return "";
  const count = parseInt(rarity) || 0;
  const img = `<img src="/images/items/${file}" alt="Stufe ${rarity}" style="width:${size}px;height:${size}px;object-fit:contain;filter:drop-shadow(0 1px 2px rgba(0,0,0,0.8));">`;
  return img.repeat(count);
}

function cardHTML(card, isFront = true) {
  if (!isFront) return `<img class="booster-slot-img" src="/images/items/rueckseite.png" alt="?" draggable="false">`;

  // image zuerst, dann icon als Fallback
  const imgFile = card?.image || card?.icon || null;
  const img = imgFile ? `/images/cards/${imgFile}` : "/images/items/rueckseite.png";
  return `
    <img class="booster-slot-img" src="${img}" alt="${card?.name || ''}" draggable="false"
         onerror="this.src='/images/items/rueckseite.png'">
    ${card?.attack  != null ? `<span class="bs-stat-atk">${card.attack}</span>`   : ""}
    ${card?.defends != null ? `<span class="bs-stat-def">${card.defends}</span>`  : ""}
    ${card?.cooldown!= null ? `<span class="bs-stat-cd">${card.cooldown}</span>`  : ""}
    ${card?.rarity  ? `<div class="bs-rarity">${rarityImgs(card.rarity, 11)}</div>` : ""}
    <div class="bs-card-name">${card?.name || ''}</div>
  `;
}

/* ================================
   Haupt-Export
================================ */
export async function loadEvents() {
  const body = document.getElementById("qm-body-events");
  if (!body) return;

  if (!document.querySelector('link[href="/css/events.css"]')) {
    const link = document.createElement("link");
    link.rel  = "stylesheet";
    link.href = "/css/events.css";
    document.head.appendChild(link);
  }

  const events = [
    { id: 1, img: "/images/items/runenhaufen.png", label: "Booster Öffnen", type: "booster" },
    { id: 2, img: "/images/items/runenhaufen.png", label: "Textzeile 2" },
    { id: 3, img: "/images/items/runenhaufen.png", label: "Textzeile 3" },
    { id: 4, img: "/images/items/runenhaufen.png", label: "Textzeile 4" },
    { id: 5, img: "/images/items/runenhaufen.png", label: "Textzeile 5" },
  ];

  body.innerHTML = `
    <div class="events-grid" id="events-grid">
      ${events.map(ev => `
        <div class="event-card" data-event-id="${ev.id}" data-type="${ev.type || ''}">
          <div class="event-card-img-wrap">
            <img src="${ev.img}" alt="${ev.label}" draggable="false">
          </div>
          <span class="event-card-label">${ev.label}</span>
        </div>`).join("")}
    </div>

    <!-- Booster UI -->
    <div id="booster-ui" class="booster-ui" style="display:none;">
      <button class="booster-back-btn" id="booster-back-btn">← Zurück</button>
      <div class="booster-stage">
        <div class="booster-left">
          <img id="booster-stapel" src="/images/items/boosterstapel.png" alt="Booster" draggable="false" class="booster-stapel-img">
          <span class="booster-stapel-hint" id="booster-hint">Klicken zum Öffnen</span>
        </div>
        <div class="booster-slots" id="booster-slots">
          ${Array.from({length: 5}, (_, i) => `
            <div class="booster-slot" id="booster-slot-${i}">
              <div class="booster-slot-inner">
                <img class="booster-slot-img" src="/images/items/rueckseite.png" alt="?" draggable="false">
              </div>
            </div>`).join("")}
        </div>
      </div>
    </div>

    <!-- Standard Detail-Popup -->
    <div id="event-detail-overlay">
      <div id="event-detail-popup">
        <button class="edp-close" id="edp-close-btn">✕</button>
        <img class="edp-img" id="edp-img" src="" alt="">
        <div class="edp-title" id="edp-title"></div>
        <div class="edp-body" id="edp-body">Inhalt folgt...</div>
      </div>
    </div>
  `;

  const overlay    = body.querySelector("#event-detail-overlay");
  const edpImg     = body.querySelector("#edp-img");
  const edpTitle   = body.querySelector("#edp-title");
  const edpBody    = body.querySelector("#edp-body");
  const boosterUi  = body.querySelector("#booster-ui");
  const eventsGrid = body.querySelector("#events-grid");

  /* ── Event-Karten ── */
  body.querySelectorAll(".event-card").forEach(card => {
    card.addEventListener("click", () => {
      if (card.dataset.type === "booster") {
        eventsGrid.style.display = "none";
        boosterUi.style.display  = "flex";
        resetBooster();
        return;
      }
      const id = Number(card.dataset.eventId);
      const ev = events.find(e => e.id === id);
      if (!ev) return;
      edpImg.src           = ev.img;
      edpImg.alt           = ev.label;
      edpTitle.textContent = ev.label;
      edpBody.textContent  = "Inhalt folgt...";
      overlay.classList.add("active");
    });
  });

  body.querySelector("#edp-close-btn").addEventListener("click", () => overlay.classList.remove("active"));
  overlay.addEventListener("click", e => { if (e.target === overlay) overlay.classList.remove("active"); });

  body.querySelector("#booster-back-btn").addEventListener("click", () => {
    eventsGrid.style.display = "";
    boosterUi.style.display  = "none";
    clearAllIntervals();
    isSpinning = false;
  });

  document.addEventListener("keydown", e => {
    if (e.key === "Escape") {
      overlay.classList.remove("active");
      eventsGrid.style.display = "";
      boosterUi.style.display  = "none";
      clearAllIntervals();
    }
  });

  /* ── Booster Zustand ── */
  let allCards      = [];
  let isSpinning    = false;
  let spinIntervals = {};   // { index: intervalId }
  let slotLocked    = {};   // { index: true }  → verhindert Überschreiben nach reveal

  function clearAllIntervals() {
    Object.values(spinIntervals).forEach(id => clearInterval(id));
    spinIntervals = {};
    slotLocked    = {};
  }

  async function preloadCards() {
    if (allCards.length) return;
    try {
      const res = await fetch("/api/booster/cards");
      if (!res.ok) throw new Error(res.status);
      allCards = await res.json();
    } catch (e) {
      console.error("Karten laden fehlgeschlagen", e);
    }
  }

  function resetBooster() {
    clearAllIntervals();
    isSpinning = false;

    for (let i = 0; i < 5; i++) {
      const inner = body.querySelector(`#booster-slot-${i} .booster-slot-inner`);
      inner.innerHTML = `<img class="booster-slot-img" src="/images/items/rueckseite.png" alt="?" draggable="false">`;
      body.querySelector(`#booster-slot-${i}`).classList.remove("revealed", "spinning");
    }

    const stapel = body.querySelector("#booster-stapel");
    stapel.classList.remove("used");
    stapel.style.opacity = "1";
    stapel.style.cursor  = "pointer";
    body.querySelector("#booster-hint").textContent = "Klicken zum Öffnen";
    preloadCards();
  }

  /* ── Slot drehen – 350ms, damit man die Karten erkennt ── */
  function startSpinSlot(index) {
    slotLocked[index] = false;
    const slot  = body.querySelector(`#booster-slot-${index}`);
    const inner = slot.querySelector(".booster-slot-inner");
    slot.classList.add("spinning");

    const iv = setInterval(() => {
      if (!allCards.length || slotLocked[index]) return;
      const rnd = allCards[Math.floor(Math.random() * allCards.length)];
      inner.innerHTML = cardHTML(rnd, true);
    }, 150);

    spinIntervals[index] = iv;
  }

  /* ── Slot enthüllen – Sperre setzen BEVOR clearInterval ── */
  function revealSlot(index, card) {
    slotLocked[index] = true;            // zuerst sperren
    clearInterval(spinIntervals[index]); // dann stoppen
    delete spinIntervals[index];

    console.log(`[Booster] Slot ${index} enthüllt:`, card);

    const slot  = body.querySelector(`#booster-slot-${index}`);
    const inner = slot.querySelector(".booster-slot-inner");
    slot.classList.remove("spinning");
    slot.classList.add("revealed");

    // innerHTML setzen und danach nochmal sicherstellen (doppelte Absicherung)
    inner.innerHTML = cardHTML(card, true);
    setTimeout(() => {
      if (slot.classList.contains("revealed")) {
        inner.innerHTML = cardHTML(card, true);
      }
    }, 100);
  }

  /* ── Stapel klicken ── */
  body.querySelector("#booster-stapel").addEventListener("click", async () => {
    if (isSpinning) return;
    if (!allCards.length) await preloadCards();
    if (!allCards.length) return;

    isSpinning = true;

    const stapel = body.querySelector("#booster-stapel");
    stapel.classList.add("used");
    stapel.style.opacity = "0.35";
    stapel.style.cursor  = "default";
    body.querySelector("#booster-hint").textContent = "Wird gezogen...";

    let drawnCards = [];
    try {
      const res  = await fetch("/api/booster/open", { method: "POST" });
      const text = await res.text();
      console.log("[Booster] API Antwort raw:", text);
      const data = JSON.parse(text);
      console.log("[Booster] API Antwort parsed:", data);
      drawnCards = data.cards || [];
      console.log("[Booster] drawnCards:", drawnCards);
    } catch (e) {
      console.error("Booster öffnen fehlgeschlagen", e);
      resetBooster();
      return;
    }

    for (let i = 0; i < 5; i++) startSpinSlot(i);

    for (let i = 0; i < 5; i++) {
      setTimeout(() => revealSlot(i, drawnCards[i]), (i + 1) * 5000);
    }

    setTimeout(() => {
      body.querySelector("#booster-hint").textContent = "Alle Karten enthüllt!";
      isSpinning = false;
    }, 5 * 5000 + 500);
  });

  preloadCards();
}