// @ts-nocheck

const cleanTerm = (text) => text.replace(/\s+/g, " ").replace(/\.$/, "").trim();

const slugify = (text) =>
  text
    .toLowerCase()
    .replace(/[^a-z0-9]+/g, "-")
    .replace(/^-+|-+$/g, "");

const entrySpans = Array.from(document.querySelectorAll("span.none2"));
const entryMap = new Map();

entrySpans.forEach((span, index) => {
  const term = cleanTerm(span.textContent);
  if (!term) {
    return;
  }
  const id = `entry-${slugify(term)}`;
  span.setAttribute("id", id);
  span.classList.add("entry-title");
  span.style.setProperty("--entry-delay", `${Math.min(index * 0.01, 0.4)}s`);
  entryMap.set(term, id);
});

const tocList = document.getElementById("toc-list");
const tocLetters = document.getElementById("toc-letters");
const termEntries = Array.from(entryMap.entries()).sort(([a], [b]) =>
  a.localeCompare(b),
);

const firstByLetter = new Map();
termEntries.forEach(([term, id]) => {
  const letter = term[0] ? term[0].toUpperCase() : "#";
  if (!firstByLetter.has(letter)) {
    firstByLetter.set(letter, id);
  }
  const link = document.createElement("a");
  link.href = `#${id}`;
  link.textContent = term;
  const item = document.createElement("li");
  item.appendChild(link);
  tocList?.appendChild(item);
});

Array.from(firstByLetter.entries())
  .sort(([a], [b]) => a.localeCompare(b))
  .forEach(([letter, id]) => {
    const link = document.createElement("a");
    link.href = `#${id}`;
    link.textContent = letter;
    tocLetters?.appendChild(link);
  });

const searchInput = document.getElementById("toc-search");
let searchTimeout;
searchInput?.addEventListener("input", (event) => {
  clearTimeout(searchTimeout);
  searchTimeout = setTimeout(() => {
    const query = event.target.value.trim().toLowerCase();
    Array.from(tocList?.querySelectorAll("li") ?? []).forEach((item) => {
      const text = item.textContent.toLowerCase();
      item.style.display = text.includes(query) ? "" : "none";
    });
  }, 50);
});

// OCR/formatting errors from epub conversion
const typoFixes = {
  "GAY MA G E": "GAY MAGE",
  "MORE ON RIVERS RIVERS": "RIVERS",
  "REEK OF WRONG NESS": "REEK OF WRONGNESS",
  "WITCH LIGHT": "WITCHLIGHT",
};

// truncated possessives and hyphenated terms
const partialMatches = {
  "A KING'S": "KINGS",
  "KING'": "KINGS",
  "MERCHANT'": "MERCHANTS",
  "POWER-": "POWER",
  "WIZARD'": "WIZARDS",
  "WIZARD'S": "WIZARDS",
  "WIZARD'S BREEDING PROGRAMME": "BREEDING PROGRAMMES",
  "WIZARD'S STAFF": "STAFFS",
};

// British/American spelling and verb forms
const spellingVariants = {
  AMBUSHED: "AMBUSHES",
  BACKLASHES: "BACKLASH OF MAGIC",
  CURSED: "CURSES",
  "FELLOW TRAVELLER": "FELLOW TRAVELERS",
  "FELLOW TRAVELLERS": "FELLOW TRAVELERS",
};

// different terms mapping to canonical entries
const synonyms = {
  "A BARD": "BARDS",
  "A COURTIER": "COURTIERS",
  "A DEMON": "DEMONS",
  "A GODDESS OR GOD": "GODDESSES AND GODS",
  "A HERBWOMAN": "HERBWOMAN",
  "A MAGIC USER": "MAGIC USERS",
  "A SEER": "SEER",
  "A WIZARD": "WIZARDS",
  ASSASSIN: "ASSASSINS, GUILD OF",
  ASSASSINS: "ASSASSINS, GUILD OF",
  BALLAD: "BALLAD, How to Compose a",
  BALLADS: "BALLAD, How to Compose a",
  BLOCKED: "MOUNTAIN PASS, BLOCKED",
  CHILD: "CHILDREN",
  ETERNAL: "ETERNAL QUEST",
  "EVIL SPELLS": "SPELLS",
  FEMALE: "SLAVES, FEMALE,",
  "GIFT OF SIGHT": "SIGHT",
  GOD: "GODDESSES AND GODS",
  GODDESS: "GODDESSES AND GODS",
  "GODDESS OR GOD": "GODDESSES AND GODS",
  GODS: "GODDESSES AND GODS",
  "GOOD KING": "KINGS",
  "GOOD SPY": "SPIES",
  "GOOD WIZARDS": "WIZARDS",
  "GUILD OF": "ASSASSINS, GUILD OF",
  HERBWOMEN: "HERBWOMAN",
  HERO: "HEROES",
  "HIDDEN CITY": "HIDDEN KINGDOM",
  "HOMESPUN ROBES": "ROBES",
  "HOW TO INTERACT WITH WIZARDS": "WIZARDS",
  IMPORT: "IMPORT/EXPORT",
  "JOURNEY CAKE": "WAYBREAD OR JOURNEY CAKE",
  "LOST LAND": "LOST LANDS,",
  "LOST LANDS": "LOST LANDS,",
  MAGELIGHT: "MAGELIGHT OR MAGEFIRE",
  MALE: "SLAVES, MALE,",
  MINION: "MINIONS OF THE DARK LORD",
  "MINION OF THE DARK LORD": "MINIONS OF THE DARK LORD",
  MINIONS: "MINIONS OF THE DARK LORD",
  MOON: "MOON(S)",
  "MORE ON RIVERS": "RIVERS",
  "MOUNTAIN PASS": "MOUNTAIN PASS, BLOCKED",
  "NORTHERN BARBARIANS DWELL": "NORTHERN BARBARIANS",
  PANCELTIC: "PANCELTIC TOURS",
  "PANCELTIC TOUR": "PANCELTIC TOURS",
  PENTAGRAM: "PENTAGRAM OR PENTACLE",
  PENTAGRAMS: "PENTAGRAM OR PENTACLE",
  "PRACTICE RING": "PRACTICE RING OR COMBAT RING",
  PRIESTESSES: "HIGH PRIESTESSES",
  RIVERBOAT: "RIVERS",
  "SECRET VALLEY": "VALLEYS",
  SLAVE: "GALLEY SLAVE",
  SLAVES: "SLAVES, MALE,",
  "STANDING STONES": "STONE CIRCLES",
  THIEVES: "THIEVES' GUILD",
  "TOUR COMPANIONS": "COMPANIONS",
  "TOWN COUNCIL": "COUNCIL",
  TROTS: "TROTS, THE",
  WAYBREAD: "WAYBREAD OR JOURNEY CAKE",
};

const specialCaseMap = {
  ...typoFixes,
  ...partialMatches,
  ...spellingVariants,
  ...synonyms,
};

const resolveTerm = (term) => {
  const normalized = term.replace(/'/g, "'");
  const special = specialCaseMap[normalized];
  if (special && entryMap.has(special)) {
    return special;
  }
  if (entryMap.has(normalized)) {
    return normalized;
  }

  const lower = normalized.toLowerCase();
  const candidates = [];

  // Singularize
  if (lower.endsWith("ies")) {
    candidates.push(normalized.slice(0, -3) + "Y");
  }
  if (lower.endsWith("ves")) {
    candidates.push(normalized.slice(0, -3) + "F");
    candidates.push(normalized.slice(0, -3) + "FE");
  }
  if (lower.endsWith("es")) {
    candidates.push(normalized.slice(0, -2));
  }
  if (lower.endsWith("s")) {
    candidates.push(normalized.slice(0, -1));
  }

  // Pluralize
  if (lower.endsWith("y") && !/[aeiou]y$/.test(lower)) {
    candidates.push(normalized.slice(0, -1) + "IES");
  }
  if (lower.endsWith("f")) {
    candidates.push(normalized.slice(0, -1) + "VES");
  }
  if (lower.endsWith("fe")) {
    candidates.push(normalized.slice(0, -2) + "VES");
  }
  candidates.push(`${normalized}S`);
  if (/(s|x|z|ch|sh)$/i.test(lower)) {
    candidates.push(`${normalized}ES`);
  }

  return candidates.find((candidate) => entryMap.has(candidate)) || null;
};

const CAPS_TERM_REGEX = /\b[A-Z][A-Z0-9''\-]*(?:\s+[A-Z][A-Z0-9''\-]*)*\b/g;

const linkifyTextNode = (node) => {
  const text = node.nodeValue;
  if (!text || !/[A-Z]{2}/.test(text)) {
    return;
  }

  const matches = [];
  CAPS_TERM_REGEX.lastIndex = 0;
  let match;
  while ((match = CAPS_TERM_REGEX.exec(text)) !== null) {
    const raw = match[0];
    const cleaned = cleanTerm(raw);
    const resolved = resolveTerm(cleaned);
    if (resolved) {
      matches.push({
        start: match.index,
        end: match.index + raw.length,
        term: resolved,
        raw,
      });
    }
  }

  if (!matches.length) {
    return;
  }

  // Prefer longer matches to avoid linking a short term inside a longer one.
  const byLength = matches
    .slice()
    .sort((a, b) => b.end - b.start - (a.end - a.start) || a.start - b.start);

  const selected = [];
  byLength.forEach((candidate) => {
    const overlaps = selected.some(
      (picked) => candidate.start < picked.end && candidate.end > picked.start,
    );
    if (!overlaps) {
      selected.push(candidate);
    }
  });

  selected.sort((a, b) => a.start - b.start);

  const fragment = document.createDocumentFragment();
  let lastIndex = 0;
  selected.forEach(({ start, end, term }) => {
    if (start > lastIndex) {
      fragment.appendChild(
        document.createTextNode(text.slice(lastIndex, start)),
      );
    }
    const link = document.createElement("a");
    link.href = `#${entryMap.get(term)}`;
    link.textContent = text.slice(start, end);
    link.className = "entry-link";
    fragment.appendChild(link);
    lastIndex = end;
  });

  if (lastIndex < text.length) {
    fragment.appendChild(document.createTextNode(text.slice(lastIndex)));
  }

  node.parentNode.replaceChild(fragment, node);
};

const contentEl = document.getElementById("content");
if (contentEl) {
  const walker = document.createTreeWalker(contentEl, NodeFilter.SHOW_TEXT, {
    acceptNode: (node) => {
      const parent = node.parentElement;
      if (!parent) {
        return NodeFilter.FILTER_REJECT;
      }
      if (parent.closest("a, script, style")) {
        return NodeFilter.FILTER_REJECT;
      }
      if (parent.closest("span.none2")) {
        return NodeFilter.FILTER_REJECT;
      }
      return NodeFilter.FILTER_ACCEPT;
    },
  });

  const nodesToLinkify = [];
  while (walker.nextNode()) {
    nodesToLinkify.push(walker.currentNode);
  }

  nodesToLinkify.forEach((node) => linkifyTextNode(node));
}

// TOC collapse/expand toggle
const tocToggle = document.createElement("button");
tocToggle.className = "toc-toggle";
tocToggle.setAttribute("aria-label", "Toggle sidebar");
tocToggle.setAttribute("title", "Toggle sidebar");
document.body.appendChild(tocToggle);

const toc = document.querySelector(".toc");
const layout = document.querySelector(".layout");

const isMobile = () => window.matchMedia("(max-width: 700px)").matches;

tocToggle.addEventListener("click", () => {
  toc?.classList.toggle("collapsed");
  layout?.classList.toggle("toc-hidden");
  if (isMobile()) {
    document.body.classList.toggle("toc-open");
  } else {
    document.body.classList.toggle("toc-collapsed");
  }
});

// auto-collapse on mobile (CSS defaults to collapsed, just ensure classes match)
if (isMobile()) {
  toc?.classList.add("collapsed");
  layout?.classList.add("toc-hidden");
  document.body.classList.remove("toc-open");
}

// close drawer when clicking a toc link on mobile
tocList?.addEventListener("click", (e) => {
  if (e.target.tagName === "A" && isMobile()) {
    toc?.classList.add("collapsed");
    layout?.classList.add("toc-hidden");
    document.body.classList.remove("toc-open");
  }
});

// highlight active TOC entry based on hash
const updateActiveTocEntry = () => {
  const id = location.hash.slice(1);
  tocList?.querySelector("a.active")?.classList.remove("active");
  if (id) {
    const link = tocList?.querySelector(`a[href="#${id}"]`);
    link?.classList.add("active");
  }
};

window.addEventListener("hashchange", updateActiveTocEntry);
if (location.hash) {
  updateActiveTocEntry();
}

// Entry popup preview on hover
const popup = document.createElement("div");
popup.className = "entry-popup";
popup.hidden = true;
document.body.appendChild(popup);

let hoverTimer = null;
let closeTimer = null;
const HOVER_DELAY = 500;
const CLOSE_DELAY = 500;

const getEntryContent = (id) => {
  const titleEl = document.getElementById(id);
  if (!titleEl) return null;

  const allTitles = Array.from(document.querySelectorAll(".entry-title"));
  const titleIndex = allTitles.indexOf(titleEl);
  const nextTitle = allTitles[titleIndex + 1] || null;

  const range = document.createRange();
  range.setStartBefore(titleEl);
  if (nextTitle) {
    range.setEndBefore(nextTitle);
  } else {
    range.setEndAfter(contentEl.lastChild);
  }

  const content = range.cloneContents();

  const clonedTitle = content.querySelector(".entry-title");
  if (clonedTitle) {
    clonedTitle.removeAttribute("id");
  }

  return content;
};

const positionPopup = (linkRect) => {
  const pad = 8;
  const popupRect = popup.getBoundingClientRect();
  const vw = window.innerWidth;
  const vh = window.innerHeight;

  let top = linkRect.top - popupRect.height - pad;
  let left = linkRect.left;

  if (top < pad) {
    top = linkRect.bottom + pad;
  }

  if (left + popupRect.width > vw - pad) {
    left = vw - popupRect.width - pad;
  }

  if (left < pad) {
    left = pad;
  }

  popup.style.top = `${top}px`;
  popup.style.left = `${left}px`;
};

const showPopup = (link) => {
  const href = link.getAttribute("href");
  if (!href?.startsWith("#entry-")) return;

  const id = href.slice(1);
  const content = getEntryContent(id);
  if (!content) return;

  popup.innerHTML = "";
  popup.appendChild(content);
  popup.hidden = false;

  popup.style.top = "0";
  popup.style.left = "0";
  popup.classList.remove("visible");

  requestAnimationFrame(() => {
    popup.scrollTop = 0;
    const linkRect = link.getBoundingClientRect();
    positionPopup(linkRect);
    popup.classList.add("visible");
  });
};

const hidePopup = () => {
  popup.classList.remove("visible");
  setTimeout(() => {
    if (!popup.classList.contains("visible")) {
      popup.hidden = true;
    }
  }, 200);
};

const clearTimers = () => {
  clearTimeout(hoverTimer);
  clearTimeout(closeTimer);
  hoverTimer = null;
  closeTimer = null;
};

const isEntryLink = (el) =>
  el?.tagName === "A" &&
  el.classList.contains("entry-link") &&
  el.getAttribute("href")?.startsWith("#entry-");

contentEl?.addEventListener("mouseenter", (e) => {
  if (isMobile()) return;
  if (!isEntryLink(e.target)) return;

  clearTimers();
  hoverTimer = setTimeout(() => showPopup(e.target), HOVER_DELAY);
}, true);

contentEl?.addEventListener("mouseleave", (e) => {
  if (isMobile()) return;
  if (!isEntryLink(e.target)) return;

  clearTimers();
  closeTimer = setTimeout(hidePopup, CLOSE_DELAY);
}, true);

popup.addEventListener("mouseenter", () => {
  clearTimers();
});

popup.addEventListener("mouseleave", () => {
  clearTimers();
  closeTimer = setTimeout(hidePopup, CLOSE_DELAY);
});

popup.addEventListener("click", (e) => {
  if (e.target.tagName === "A") {
    clearTimers();
    hidePopup();
  }
});