(function () {
  const $ = (sel, root = document) => root.querySelector(sel);
  const $$ = (sel, root = document) => Array.from(root.querySelectorAll(sel));
  const shuffle = (items) => items.map((value) => ({ value, sort: Math.random() })).sort((a, b) => a.sort - b.sort).map((item) => item.value);
  const quips = [
    "A margin note blinks, then pretends it did not.",
    "Somewhere, a bookmark changes its mind.",
    "The archive is pleased by unnecessary curiosity.",
    "A tiny bell rings in a room you have not built yet.",
    "The page remembers that you came here."
  ];

  document.addEventListener("DOMContentLoaded", () => {
    const root = $(".play-root[data-play-page]");
    if (!root) return;
    const page = root.dataset.playPage;
    const inits = { hub, memory, constellation, poem, bookshelf, ink, terminal, study, sigil };
    if (inits[page]) inits[page](root);
  });

  function hub(root) {
    const links = $$(".play-grid a", root);
    const nodes = $$(".play-orbit__node", root);
    const title = $("#play-hub-title", root);
    const kind = $("#play-hub-kind", root);
    const desc = $("#play-hub-desc", root);
    const cta = $("#play-hub-link", root);
    const whisper = document.createElement("p");
    let active = 0;

    whisper.className = "play-whisper";
    whisper.setAttribute("aria-live", "polite");
    $(".play-console__screen", root).appendChild(whisper);

    nodes.forEach((node, index) => {
      const angle = (index / nodes.length) * Math.PI * 2 - Math.PI / 2;
      node.style.left = `${50 + Math.cos(angle) * 43}%`;
      node.style.top = `${50 + Math.sin(angle) * 43}%`;
      node.addEventListener("click", () => setActive(index));
    });

    function setActive(index) {
      active = (index + links.length) % links.length;
      const link = links[active];
      links.forEach((item, i) => item.classList.toggle("is-active", i === active));
      nodes.forEach((item, i) => item.classList.toggle("is-active", i === active));
      title.textContent = link.querySelector("strong").textContent;
      kind.textContent = link.dataset.kind;
      desc.textContent = link.dataset.desc;
      cta.href = link.href;
      whisper.textContent = quips[active % quips.length];
    }

    links.forEach((link, index) => {
      link.addEventListener("mouseenter", () => setActive(index));
      link.addEventListener("focus", () => setActive(index));
    });
    $("[data-play-prev]", root).addEventListener("click", () => setActive(active - 1));
    $("[data-play-next]", root).addEventListener("click", () => setActive(active + 1));
    $("[data-play-random]", root).addEventListener("click", () => setActive(Math.floor(Math.random() * links.length)));
    $(".play-orbit", root).addEventListener("dblclick", () => {
      whisper.textContent = "You knocked twice. The cabinet knocked once back.";
      root.classList.toggle("is-odd");
    });
    root.addEventListener("keydown", (event) => {
      if (event.key === "ArrowLeft") setActive(active - 1);
      if (event.key === "ArrowRight") setActive(active + 1);
    });
    setActive(0);
  }

  function memory(root) {
    const symbols = ["Ink", "Lamp", "Tea", "Book", "Map", "Key"];
    const board = $("[data-memory-board]", root);
    const turnsEl = $("[data-memory-turns]", root);
    const matchesEl = $("[data-memory-matches]", root);
    const messageEl = $("[data-memory-message]", root);
    let open = [];
    let turns = 0;
    let matches = 0;
    let deck = [];

    function render() {
      board.innerHTML = "";
      open = [];
      turns = 0;
      matches = 0;
      deck = shuffle([...symbols, ...symbols]);
      turnsEl.textContent = "0";
      matchesEl.textContent = "0";
      messageEl.textContent = "Cards are shuffled.";
      deck.forEach((symbol, index) => {
        const card = document.createElement("button");
        card.type = "button";
        card.className = "memory-card";
        card.dataset.symbol = symbol;
        card.textContent = "?";
        card.style.setProperty("--tilt", `${(index % 5) - 2}deg`);
        card.setAttribute("aria-label", "Hidden card");
        card.addEventListener("click", () => flip(card));
        board.appendChild(card);
      });
    }

    function flip(card) {
      if (card.classList.contains("is-open") || card.classList.contains("is-matched") || open.length === 2) return;
      card.classList.add("is-open");
      card.textContent = card.dataset.symbol;
      card.setAttribute("aria-label", card.dataset.symbol);
      open.push(card);
      if (open.length !== 2) return;
      turns += 1;
      turnsEl.textContent = String(turns);
      const [a, b] = open;
      if (a.dataset.symbol === b.dataset.symbol) {
        a.classList.add("is-matched");
        b.classList.add("is-matched");
        open = [];
        matches += 1;
        matchesEl.textContent = String(matches);
        messageEl.textContent = matches === symbols.length ? `Cabinet solved in ${turns} turns.` : "A drawer clicks open.";
      } else {
        messageEl.textContent = "No match. The cabinet quietly re-files them.";
        setTimeout(() => {
          a.classList.remove("is-open");
          b.classList.remove("is-open");
          a.textContent = "?";
          b.textContent = "?";
          a.setAttribute("aria-label", "Hidden card");
          b.setAttribute("aria-label", "Hidden card");
          open = [];
        }, 650);
      }
    }

    $("[data-memory-reset]", root).addEventListener("click", render);
    $("[data-memory-peek]", root).addEventListener("click", () => {
      const hidden = $$(".memory-card:not(.is-open):not(.is-matched)", root);
      hidden.forEach((card) => {
        card.textContent = card.dataset.symbol;
        card.classList.add("is-peeking");
      });
      messageEl.textContent = "A very brief lapse in scholarly discipline.";
      setTimeout(() => {
        hidden.forEach((card) => {
          if (!card.classList.contains("is-open") && !card.classList.contains("is-matched")) card.textContent = "?";
          card.classList.remove("is-peeking");
        });
      }, 900);
    });
    render();
  }

  function constellation(root) {
    const canvas = $("[data-star-canvas]", root);
    const ctx = canvas.getContext("2d");
    const linesEl = $("[data-star-lines]", root);
    const nameEl = document.createElement("strong");
    const stars = Array.from({ length: 18 }, () => ({ x: 50 + Math.random() * 800, y: 45 + Math.random() * 430 }));
    const lines = [];
    let selected = null;
    nameEl.className = "play-live-note";
    linesEl.closest(".play-scorebar").appendChild(nameEl);

    function draw() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      ctx.fillStyle = "#18130f";
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      ctx.strokeStyle = "rgba(219, 184, 104, 0.65)";
      ctx.lineWidth = 2;
      lines.forEach(([a, b]) => {
        ctx.beginPath();
        ctx.moveTo(stars[a].x, stars[a].y);
        ctx.lineTo(stars[b].x, stars[b].y);
        ctx.stroke();
      });
      stars.forEach((star, index) => {
        ctx.beginPath();
        ctx.fillStyle = index === selected ? "#f6d889" : "#fff8e8";
        ctx.arc(star.x, star.y, index === selected ? 7 : 4, 0, Math.PI * 2);
        ctx.fill();
      });
      linesEl.textContent = String(lines.length);
      if (lines.length >= 3) nameEl.textContent = `Named: ${pick(["The Patient Spoon", "The South Window", "The Tired Comet", "The Fifth Errand"])}`;
    }

    canvas.addEventListener("click", (event) => {
      const rect = canvas.getBoundingClientRect();
      const x = ((event.clientX - rect.left) / rect.width) * canvas.width;
      const y = ((event.clientY - rect.top) / rect.height) * canvas.height;
      const hit = stars.findIndex((star) => Math.hypot(star.x - x, star.y - y) < 22);
      if (hit < 0) return;
      if (selected === null) selected = hit;
      else if (selected !== hit) {
        lines.push([selected, hit]);
        selected = hit;
      }
      draw();
    });
    $("[data-star-reset]", root).addEventListener("click", () => {
      lines.length = 0;
      selected = null;
      nameEl.textContent = "";
      draw();
    });
    draw();
  }

  function poem(root) {
    const output = $("[data-poem-output]", root);
    const a = ["In the margin", "By the kettle", "Under the desk lamp", "Between two errands", "After the house quiets"];
    const b = ["a careful thought", "an old joke", "a stubborn question", "a useful mistake", "a bright scrap"];
    const c = ["learns to wait.", "asks for a second reading.", "finds its proper shelf.", "becomes tomorrow's note.", "keeps the page warm."];
    let count = 0;
    function make() {
      count += 1;
      output.innerHTML = `${pick(a)}<br>${pick(b)}<br>${pick(c)}`;
      output.dataset.stamp = count % 5 === 0 ? "approved by the margin" : "";
    }
    $("[data-poem-generate]", root).addEventListener("click", make);
    make();
  }

  function bookshelf(root) {
    const titles = ["Algebra at Breakfast", "Cabinet of Weather", "Domestic Orbits", "Evening Margins", "Household Engines", "Zettels and Tea"];
    const shelf = $("[data-bookshelf]", root);
    const status = $("[data-bookshelf-status]", root);
    let sortedOnce = false;
    setupSortable(shelf, render, check);
    $("[data-bookshelf-shuffle]", root).addEventListener("click", () => render(shuffle(titles)));
    render(shuffle(titles));

    function render(items) {
      shelf.innerHTML = "";
      items.forEach((title) => {
        const book = document.createElement("div");
        book.className = "book-spine";
        book.draggable = true;
        book.dataset.value = title;
        book.textContent = title;
        shelf.appendChild(book);
      });
      check();
    }
    function check() {
      const current = $$(".book-spine", shelf).map((book) => book.dataset.value);
      const sorted = current.join("|") === titles.join("|");
      status.textContent = sorted ? "Shelf sorted. A secret pamphlet slides out." : "Unsorted";
      if (sorted && !sortedOnce) {
        sortedOnce = true;
        const pamphlet = document.createElement("div");
        pamphlet.className = "booklet";
        pamphlet.textContent = "Pamphlet: On the Correct Order of Small Things";
        shelf.appendChild(pamphlet);
      }
    }
  }

  function ink(root) {
    const canvas = $("[data-ink-canvas]", root);
    const ctx = canvas.getContext("2d");
    const drops = [];
    let moon = false;
    function addDrop(x, y, heavy) {
      drops.push({ x, y, r: heavy ? 18 : 8, life: heavy ? 1.8 : 1, hue: 28 + Math.random() * 35 });
    }
    function pointer(event, heavy) {
      const rect = canvas.getBoundingClientRect();
      addDrop(((event.clientX - rect.left) / rect.width) * canvas.width, ((event.clientY - rect.top) / rect.height) * canvas.height, heavy);
    }
    canvas.addEventListener("pointermove", (event) => pointer(event, false));
    canvas.addEventListener("click", (event) => pointer(event, true));
    canvas.addEventListener("dblclick", () => {
      moon = !moon;
    });
    function frame() {
      ctx.fillStyle = "rgba(24, 19, 15, 0.16)";
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      if (moon) {
        ctx.beginPath();
        ctx.fillStyle = "rgba(246, 216, 137, 0.72)";
        ctx.arc(760, 88, 34, 0, Math.PI * 2);
        ctx.fill();
      }
      drops.forEach((drop) => {
        drop.r += 0.7;
        drop.life -= 0.012;
        ctx.beginPath();
        ctx.strokeStyle = `hsla(${drop.hue}, 65%, 68%, ${Math.max(drop.life, 0)})`;
        ctx.lineWidth = 2;
        ctx.arc(drop.x, drop.y, drop.r, 0, Math.PI * 2);
        ctx.stroke();
      });
      for (let i = drops.length - 1; i >= 0; i -= 1) if (drops[i].life <= 0) drops.splice(i, 1);
      requestAnimationFrame(frame);
    }
    frame();
  }

  function terminal(root) {
    const log = $("[data-terminal-log]", root);
    const form = $("[data-terminal-form]", root);
    const input = $("[data-terminal-input]", root);
    let kindness = 0;
    const responses = {
      help: "Commands: help, look, map, open drawer, read note, brew tea, hum, knock, save, inventory, clear",
      look: "A narrow archive room. A lamp hums. A drawer is labelled MAYBE IMPORTANT.",
      map: "You are between the reading desk, the family shelf, and the door back to Play.",
      "open drawer": "Inside: a brass key, a receipt, and a note folded twice.",
      "read note": "The note says: keep the site useful, but leave a few doors ajar.",
      "brew tea": "The room smells briefly of cardamom. Nothing else changes, which is enough.",
      hum: "You hum four careful notes. Something behind the wall hums five back.",
      knock: "Knock. Knock. ... A polite pause. Knock.",
      save: "You save your place in the archive. The archive saves its place in you.",
      inventory: "You are carrying: a brass key, a warm cup, and one unreasonable hope."
    };
    function write(text) {
      log.textContent += `${text}\n`;
      log.scrollTop = log.scrollHeight;
    }
    form.addEventListener("submit", (event) => {
      event.preventDefault();
      const cmd = input.value.trim().toLowerCase();
      if (!cmd) return;
      input.value = "";
      if (cmd === "clear") {
        log.textContent = "";
        return;
      }
      write(`> ${cmd}`);
      if (cmd === "pet book") {
        kindness += 1;
        write(kindness > 2 ? "The book follows you for exactly three pages." : "The book accepts this with suspicious dignity.");
      } else {
        write(responses[cmd] || "The archive declines to understand that command.");
      }
    });
    write("Archive terminal ready. Type help. The cursor is listening.");
    input.focus();
  }

  function study(root) {
    const time = $("[data-study-time]", root);
    const scene = $("[data-study-scene]", root);
    let total = 300;
    let left = total;
    let timer = null;
    const note = document.createElement("div");
    note.className = "play-live-note";
    note.textContent = "The lamp is cold.";
    time.insertAdjacentElement("afterend", note);
    function draw() {
      const done = 1 - left / total;
      scene.style.setProperty("--lamp", String(0.18 + done * 0.72));
      scene.style.setProperty("--glow", `${done * 70}px`);
      const m = String(Math.floor(left / 60)).padStart(2, "0");
      const s = String(left % 60).padStart(2, "0");
      time.textContent = `${m}:${s}`;
      if (left === 0) note.textContent = "Focus complete. The desk looks proud.";
      else if (done > 0.66) note.textContent = "The page has warmed through.";
      else if (done > 0.33) note.textContent = "The lamp has settled into its work.";
    }
    function start() {
      if (timer) return;
      timer = setInterval(() => {
        left = Math.max(0, left - 1);
        draw();
        if (left === 0) pause();
      }, 1000);
    }
    function pause() {
      clearInterval(timer);
      timer = null;
    }
    $("[data-study-start]", root).addEventListener("click", start);
    $("[data-study-pause]", root).addEventListener("click", pause);
    $("[data-study-reset]", root).addEventListener("click", () => {
      pause();
      left = total;
      draw();
    });
    draw();
  }

  function sigil(root) {
    const canvas = $("[data-sigil-canvas]", root);
    const ctx = canvas.getContext("2d");
    const initials = $("[data-sigil-initials]", root);
    const motto = $("[data-sigil-motto]", root);
    let wax = "#9c6b2f";
    const waxButton = document.createElement("button");
    waxButton.type = "button";
    waxButton.textContent = "New wax";
    $("[data-sigil-form]", root).appendChild(waxButton);
    function draw() {
      const text = (initials.value || "ZXH").toUpperCase();
      const phrase = motto.value || "Learn, make, remember";
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      ctx.fillStyle = "#fbf7ec";
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      ctx.translate(260, 260);
      ctx.strokeStyle = wax;
      ctx.lineWidth = 10;
      ctx.beginPath();
      ctx.arc(0, 0, 190, 0, Math.PI * 2);
      ctx.stroke();
      ctx.lineWidth = 2;
      for (let i = 0; i < 12; i += 1) {
        ctx.rotate(Math.PI / 6);
        ctx.beginPath();
        ctx.moveTo(0, -150);
        ctx.lineTo(0, -185);
        ctx.stroke();
      }
      ctx.rotate(-Math.PI * 2);
      ctx.fillStyle = "#2a2118";
      ctx.textAlign = "center";
      ctx.textBaseline = "middle";
      ctx.font = "900 94px Georgia, serif";
      ctx.fillText(text.slice(0, 4), 0, -10);
      ctx.font = "700 22px Georgia, serif";
      ctx.fillText(phrase.slice(0, 34), 0, 88);
      ctx.setTransform(1, 0, 0, 1, 0, 0);
    }
    waxButton.addEventListener("click", () => {
      wax = pick(["#9c6b2f", "#8a3f3f", "#486b57", "#3e5f8a", "#5f4b8b"]);
      draw();
    });
    $("[data-sigil-form]", root).addEventListener("submit", (event) => {
      event.preventDefault();
      draw();
    });
    initials.addEventListener("input", draw);
    motto.addEventListener("input", draw);
    draw();
  }

  function setupSortable(container, _render, after) {
    let dragged = null;
    container.addEventListener("dragstart", (event) => {
      dragged = event.target.closest("[draggable='true']");
      if (dragged) event.dataTransfer.effectAllowed = "move";
    });
    container.addEventListener("dragover", (event) => {
      event.preventDefault();
      const target = event.target.closest("[draggable='true']");
      if (!dragged || !target || target === dragged) return;
      const rect = target.getBoundingClientRect();
      const before = event.clientY < rect.top + rect.height / 2 || event.clientX < rect.left + rect.width / 2;
      container.insertBefore(dragged, before ? target : target.nextSibling);
      after();
    });
    container.addEventListener("dragend", () => {
      dragged = null;
      after();
    });
  }

  function pick(items) {
    return items[Math.floor(Math.random() * items.length)];
  }
})();