/* ui-holidays.js - Standalone holiday repository browser */
(function () {
  "use strict";

  const { getTarotCardDisplayName, getTarotCardSearchAliases } = window.TarotCardImages || {};

  const state = {
    initialized: false,
    referenceData: null,
    magickDataset: null,
    selectedYear: new Date().getFullYear(),
    selectedSource: "all",
    searchQuery: "",
    holidays: [],
    filteredHolidays: [],
    selectedHolidayId: null,
    planetsById: new Map(),
    signsById: new Map(),
    godsById: new Map(),
    hebrewById: new Map(),
    calendarData: {}
  };

  const TAROT_TRUMP_NUMBER_BY_NAME = {
    "the fool": 0,
    fool: 0,
    "the magus": 1,
    magus: 1,
    magician: 1,
    "the high priestess": 2,
    "high priestess": 2,
    "the empress": 3,
    empress: 3,
    "the emperor": 4,
    emperor: 4,
    "the hierophant": 5,
    hierophant: 5,
    "the lovers": 6,
    lovers: 6,
    "the chariot": 7,
    chariot: 7,
    strength: 8,
    lust: 8,
    "the hermit": 9,
    hermit: 9,
    fortune: 10,
    "wheel of fortune": 10,
    justice: 11,
    "the hanged man": 12,
    "hanged man": 12,
    death: 13,
    temperance: 14,
    art: 14,
    "the devil": 15,
    devil: 15,
    "the tower": 16,
    tower: 16,
    "the star": 17,
    star: 17,
    "the moon": 18,
    moon: 18,
    "the sun": 19,
    sun: 19,
    aeon: 20,
    judgement: 20,
    judgment: 20,
    universe: 21,
    world: 21,
    "the world": 21
  };

  const HEBREW_MONTH_ALIAS_BY_ID = {
    nisan: ["nisan"],
    iyar: ["iyar"],
    sivan: ["sivan"],
    tammuz: ["tamuz", "tammuz"],
    av: ["av"],
    elul: ["elul"],
    tishrei: ["tishri", "tishrei"],
    cheshvan: ["heshvan", "cheshvan", "marcheshvan"],
    kislev: ["kislev"],
    tevet: ["tevet"],
    shvat: ["shevat", "shvat"],
    adar: ["adar", "adar i", "adar 1"],
    "adar-ii": ["adar ii", "adar 2"]
  };

  const MONTH_NAME_TO_INDEX = {
    january: 0,
    february: 1,
    march: 2,
    april: 3,
    may: 4,
    june: 5,
    july: 6,
    august: 7,
    september: 8,
    october: 9,
    november: 10,
    december: 11
  };

  const GREGORIAN_MONTH_ID_TO_ORDER = {
    january: 1,
    february: 2,
    march: 3,
    april: 4,
    may: 5,
    june: 6,
    july: 7,
    august: 8,
    september: 9,
    october: 10,
    november: 11,
    december: 12
  };

  function getElements() {
    return {
      sourceSelectEl: document.getElementById("holiday-source-select"),
      yearInputEl: document.getElementById("holiday-year-input"),
      searchInputEl: document.getElementById("holiday-search-input"),
      searchClearEl: document.getElementById("holiday-search-clear"),
      countEl: document.getElementById("holiday-count"),
      listEl: document.getElementById("holiday-list"),
      detailNameEl: document.getElementById("holiday-detail-name"),
      detailSubEl: document.getElementById("holiday-detail-sub"),
      detailBodyEl: document.getElementById("holiday-detail-body")
    };
  }

  function normalizeText(value) {
    return String(value || "").trim();
  }

  function normalizeSearchValue(value) {
    return String(value || "").trim().toLowerCase();
  }

  function cap(value) {
    const text = normalizeText(value);
    return text ? text.charAt(0).toUpperCase() + text.slice(1) : text;
  }

  function normalizeTarotName(value) {
    return String(value || "")
      .trim()
      .toLowerCase()
      .replace(/\s+/g, " ");
  }

  function resolveTarotTrumpNumber(cardName) {
    const key = normalizeTarotName(cardName);
    if (!key) {
      return null;
    }
    if (Object.prototype.hasOwnProperty.call(TAROT_TRUMP_NUMBER_BY_NAME, key)) {
      return TAROT_TRUMP_NUMBER_BY_NAME[key];
    }
    const withoutLeadingThe = key.replace(/^the\s+/, "");
    if (Object.prototype.hasOwnProperty.call(TAROT_TRUMP_NUMBER_BY_NAME, withoutLeadingThe)) {
      return TAROT_TRUMP_NUMBER_BY_NAME[withoutLeadingThe];
    }
    return null;
  }

  function getDisplayTarotName(cardName, trumpNumber) {
    if (!cardName) {
      return "";
    }

    if (typeof getTarotCardDisplayName !== "function") {
      return cardName;
    }

    if (Number.isFinite(Number(trumpNumber))) {
      return getTarotCardDisplayName(cardName, { trumpNumber: Number(trumpNumber) }) || cardName;
    }

    return getTarotCardDisplayName(cardName) || cardName;
  }

  function normalizeCalendarText(value) {
    return String(value || "")
      .normalize("NFKD")
      .replace(/[\u0300-\u036f]/g, "")
      .replace(/['`]/g, "")
      .toLowerCase()
      .replace(/[^a-z0-9]+/g, " ")
      .trim();
  }

  function readNumericPart(parts, partType) {
    const raw = parts.find((part) => part.type === partType)?.value;
    if (!raw) {
      return null;
    }

    const digits = String(raw).replace(/[^0-9]/g, "");
    if (!digits) {
      return null;
    }

    const parsed = Number(digits);
    return Number.isFinite(parsed) ? parsed : null;
  }

  function getGregorianMonthOrderFromId(monthId) {
    if (!monthId) {
      return null;
    }
    const key = String(monthId).trim().toLowerCase();
    const value = GREGORIAN_MONTH_ID_TO_ORDER[key];
    return Number.isFinite(value) ? value : null;
  }

  function parseMonthDayStartToken(token) {
    const match = String(token || "").match(/(\d{2})-(\d{2})/);
    if (!match) {
      return null;
    }

    const month = Number(match[1]);
    const day = Number(match[2]);
    if (!Number.isFinite(month) || !Number.isFinite(day)) {
      return null;
    }

    return { month, day };
  }

  function createDateAtNoon(year, monthIndex, dayOfMonth) {
    return new Date(Math.trunc(year), monthIndex, Math.trunc(dayOfMonth), 12, 0, 0, 0);
  }

  function computeWesternEasterDate(year) {
    const y = Math.trunc(Number(year));
    if (!Number.isFinite(y)) {
      return null;
    }

    // Meeus/Jones/Butcher Gregorian algorithm.
    const a = y % 19;
    const b = Math.floor(y / 100);
    const c = y % 100;
    const d = Math.floor(b / 4);
    const e = b % 4;
    const f = Math.floor((b + 8) / 25);
    const g = Math.floor((b - f + 1) / 3);
    const h = (19 * a + b - d - g + 15) % 30;
    const i = Math.floor(c / 4);
    const k = c % 4;
    const l = (32 + 2 * e + 2 * i - h - k) % 7;
    const m = Math.floor((a + 11 * h + 22 * l) / 451);
    const month = Math.floor((h + l - 7 * m + 114) / 31);
    const day = ((h + l - 7 * m + 114) % 31) + 1;
    return createDateAtNoon(y, month - 1, day);
  }

  function computeNthWeekdayOfMonth(year, monthIndex, weekday, ordinal) {
    const y = Math.trunc(Number(year));
    if (!Number.isFinite(y)) {
      return null;
    }

    const first = createDateAtNoon(y, monthIndex, 1);
    const firstWeekday = first.getDay();
    const offset = (weekday - firstWeekday + 7) % 7;
    const dayOfMonth = 1 + offset + (Math.trunc(ordinal) - 1) * 7;
    const daysInMonth = new Date(y, monthIndex + 1, 0).getDate();
    if (dayOfMonth > daysInMonth) {
      return null;
    }
    return createDateAtNoon(y, monthIndex, dayOfMonth);
  }

  function resolveGregorianDateRule(rule) {
    const key = String(rule || "").trim().toLowerCase();
    if (!key) {
      return null;
    }

    if (key === "gregorian-easter-sunday") {
      return computeWesternEasterDate(state.selectedYear);
    }

    if (key === "gregorian-good-friday") {
      const easter = computeWesternEasterDate(state.selectedYear);
      if (!(easter instanceof Date) || Number.isNaN(easter.getTime())) {
        return null;
      }
      return createDateAtNoon(easter.getFullYear(), easter.getMonth(), easter.getDate() - 2);
    }

    if (key === "gregorian-thanksgiving-us") {
      // US Thanksgiving: 4th Thursday of November.
      return computeNthWeekdayOfMonth(state.selectedYear, 10, 4, 4);
    }

    return null;
  }

  function parseFirstMonthDayFromText(dateText) {
    const text = String(dateText || "").replace(/~/g, " ");
    const firstSegment = text.split("/")[0] || text;
    const match = firstSegment.match(/(January|February|March|April|May|June|July|August|September|October|November|December)\s+(\d{1,2})/i);
    if (!match) {
      return null;
    }

    const monthIndex = MONTH_NAME_TO_INDEX[String(match[1]).toLowerCase()];
    const day = Number(match[2]);
    if (!Number.isFinite(monthIndex) || !Number.isFinite(day)) {
      return null;
    }

    return { monthIndex, day };
  }

  function findHebrewMonthDayInGregorianYear(monthId, day, year) {
    const aliases = HEBREW_MONTH_ALIAS_BY_ID[String(monthId || "").toLowerCase()] || [];
    const targetDay = Number(day);
    if (!aliases.length || !Number.isFinite(targetDay) || !Number.isFinite(year)) {
      return null;
    }

    const normalizedAliases = aliases.map((alias) => normalizeCalendarText(alias)).filter(Boolean);
    const formatter = new Intl.DateTimeFormat("en-u-ca-hebrew", {
      day: "numeric",
      month: "long",
      year: "numeric"
    });

    const cursor = new Date(Math.trunc(year), 0, 1, 12, 0, 0, 0);
    const end = new Date(Math.trunc(year), 11, 31, 12, 0, 0, 0);

    while (cursor.getTime() <= end.getTime()) {
      const parts = formatter.formatToParts(cursor);
      const currentDay = readNumericPart(parts, "day");
      const monthName = normalizeCalendarText(parts.find((part) => part.type === "month")?.value);
      if (currentDay === Math.trunc(targetDay) && normalizedAliases.includes(monthName)) {
        return new Date(cursor);
      }
      cursor.setDate(cursor.getDate() + 1);
    }

    return null;
  }

  function getIslamicMonthOrderById(monthId) {
    const month = (state.calendarData?.islamic || []).find((item) => item?.id === monthId);
    const order = Number(month?.order);
    return Number.isFinite(order) ? Math.trunc(order) : null;
  }

  function findIslamicMonthDayInGregorianYear(monthId, day, year) {
    const monthOrder = getIslamicMonthOrderById(monthId);
    const targetDay = Number(day);
    if (!Number.isFinite(monthOrder) || !Number.isFinite(targetDay) || !Number.isFinite(year)) {
      return null;
    }

    const formatter = new Intl.DateTimeFormat("en-u-ca-islamic", {
      day: "numeric",
      month: "numeric",
      year: "numeric"
    });

    const cursor = new Date(Math.trunc(year), 0, 1, 12, 0, 0, 0);
    const end = new Date(Math.trunc(year), 11, 31, 12, 0, 0, 0);

    while (cursor.getTime() <= end.getTime()) {
      const parts = formatter.formatToParts(cursor);
      const currentDay = readNumericPart(parts, "day");
      const currentMonth = readNumericPart(parts, "month");
      if (currentDay === Math.trunc(targetDay) && currentMonth === monthOrder) {
        return new Date(cursor);
      }
      cursor.setDate(cursor.getDate() + 1);
    }

    return null;
  }

  function resolveHolidayGregorianDate(holiday) {
    if (!holiday || typeof holiday !== "object") {
      return null;
    }

    const calendarId = String(holiday.calendarId || "").trim().toLowerCase();
    const monthId = String(holiday.monthId || "").trim().toLowerCase();
    const day = Number(holiday.day);

    if (calendarId === "gregorian") {
      if (holiday?.dateRule) {
        const ruledDate = resolveGregorianDateRule(holiday.dateRule);
        if (ruledDate) {
          return ruledDate;
        }
      }

      const monthDay = parseMonthDayStartToken(holiday.monthDayStart) || parseMonthDayStartToken(holiday.dateText);
      if (monthDay) {
        return new Date(state.selectedYear, monthDay.month - 1, monthDay.day, 12, 0, 0, 0);
      }
      const order = getGregorianMonthOrderFromId(monthId);
      if (Number.isFinite(order) && Number.isFinite(day)) {
        return new Date(state.selectedYear, order - 1, Math.trunc(day), 12, 0, 0, 0);
      }
      return null;
    }

    if (calendarId === "hebrew") {
      return findHebrewMonthDayInGregorianYear(monthId, day, state.selectedYear);
    }

    if (calendarId === "islamic") {
      return findIslamicMonthDayInGregorianYear(monthId, day, state.selectedYear);
    }

    if (calendarId === "wheel-of-year") {
      const monthDay = parseMonthDayStartToken(holiday.monthDayStart) || parseFirstMonthDayFromText(holiday.dateText);
      if (monthDay?.month && monthDay?.day) {
        return new Date(state.selectedYear, monthDay.month - 1, monthDay.day, 12, 0, 0, 0);
      }
      if (monthDay?.monthIndex != null && monthDay?.day) {
        return new Date(state.selectedYear, monthDay.monthIndex, monthDay.day, 12, 0, 0, 0);
      }
    }

    return null;
  }

  function formatGregorianReferenceDate(date) {
    if (!(date instanceof Date) || Number.isNaN(date.getTime())) {
      return "--";
    }

    return date.toLocaleDateString(undefined, {
      weekday: "long",
      year: "numeric",
      month: "long",
      day: "numeric"
    });
  }

  function formatCalendarDateFromGregorian(date, calendarId) {
    if (!(date instanceof Date) || Number.isNaN(date.getTime())) {
      return "--";
    }

    const locale = calendarId === "hebrew"
      ? "en-u-ca-hebrew"
      : (calendarId === "islamic" ? "en-u-ca-islamic" : "en");

    return new Intl.DateTimeFormat(locale, {
      weekday: "long",
      year: "numeric",
      month: "long",
      day: "numeric"
    }).format(date);
  }

  function buildPlanetMap(planetsObj) {
    const map = new Map();
    if (!planetsObj || typeof planetsObj !== "object") {
      return map;
    }

    Object.values(planetsObj).forEach((planet) => {
      if (!planet?.id) {
        return;
      }
      map.set(planet.id, planet);
    });

    return map;
  }

  function buildSignsMap(signs) {
    const map = new Map();
    if (!Array.isArray(signs)) {
      return map;
    }

    signs.forEach((sign) => {
      if (!sign?.id) {
        return;
      }
      map.set(sign.id, sign);
    });

    return map;
  }

  function buildGodsMap(magickDataset) {
    const gods = magickDataset?.grouped?.gods?.gods;
    const map = new Map();

    if (!Array.isArray(gods)) {
      return map;
    }

    gods.forEach((god) => {
      if (!god?.id) {
        return;
      }
      map.set(god.id, god);
    });

    return map;
  }

  function buildHebrewMap(magickDataset) {
    const map = new Map();
    const letters = magickDataset?.grouped?.alphabets?.hebrew;
    if (!Array.isArray(letters)) {
      return map;
    }

    letters.forEach((letter) => {
      if (!letter?.hebrewLetterId) {
        return;
      }
      map.set(letter.hebrewLetterId, letter);
    });

    return map;
  }

  function calendarLabel(calendarId) {
    const key = String(calendarId || "").trim().toLowerCase();
    if (key === "hebrew") return "Hebrew";
    if (key === "islamic") return "Islamic";
    if (key === "wheel-of-year") return "Wheel of the Year";
    return "Gregorian";
  }

  function monthLabelForCalendar(calendarId, monthId) {
    const months = state.calendarData?.[calendarId];
    if (!Array.isArray(months)) {
      return monthId || "--";
    }

    const month = months.find((entry) => String(entry?.id || "").toLowerCase() === String(monthId || "").toLowerCase());
    return month?.name || monthId || "--";
  }

  function normalizeSourceFilter(value) {
    const key = String(value || "").trim().toLowerCase();
    if (key === "gregorian" || key === "hebrew" || key === "islamic" || key === "wheel-of-year") {
      return key;
    }
    return "all";
  }

  function buildAllHolidays() {
    if (Array.isArray(state.referenceData?.calendarHolidays) && state.referenceData.calendarHolidays.length) {
      return [...state.referenceData.calendarHolidays].sort((left, right) => {
        const calCmp = calendarLabel(left?.calendarId).localeCompare(calendarLabel(right?.calendarId));
        if (calCmp !== 0) return calCmp;

        const leftDay = Number(left?.day);
        const rightDay = Number(right?.day);
        if (Number.isFinite(leftDay) && Number.isFinite(rightDay) && leftDay !== rightDay) {
          return leftDay - rightDay;
        }

        return String(left?.name || "").localeCompare(String(right?.name || ""));
      });
    }

    const legacy = Array.isArray(state.referenceData?.celestialHolidays) ? state.referenceData.celestialHolidays : [];
    return legacy.map((holiday) => ({
      ...holiday,
      calendarId: "gregorian",
      dateText: holiday?.date || holiday?.dateRange || ""
    }));
  }

  function planetLabel(planetId) {
    if (!planetId) {
      return "Planet";
    }

    const planet = state.planetsById.get(planetId);
    if (!planet) {
      return cap(planetId);
    }

    return `${planet.symbol || ""} ${planet.name || cap(planetId)}`.trim();
  }

  function zodiacLabel(signId) {
    if (!signId) {
      return "Zodiac";
    }

    const sign = state.signsById.get(signId);
    if (!sign) {
      return cap(signId);
    }

    return `${sign.symbol || ""} ${sign.name || cap(signId)}`.trim();
  }

  function godLabel(godId, godName) {
    if (godName) {
      return godName;
    }

    if (!godId) {
      return "Deity";
    }

    const god = state.godsById.get(godId);
    return god?.name || cap(godId);
  }

  function hebrewLabel(hebrewLetterId) {
    if (!hebrewLetterId) {
      return "Hebrew Letter";
    }

    const letter = state.hebrewById.get(hebrewLetterId);
    if (!letter) {
      return cap(hebrewLetterId);
    }

    return `${letter.char || ""} ${letter.name || cap(hebrewLetterId)}`.trim();
  }

  function computeDigitalRoot(value) {
    let current = Math.abs(Math.trunc(Number(value)));
    if (!Number.isFinite(current)) {
      return null;
    }

    while (current >= 10) {
      current = String(current)
        .split("")
        .reduce((sum, digit) => sum + Number(digit), 0);
    }

    return current;
  }

  function buildAssociationButtons(associations) {
    if (!associations || typeof associations !== "object") {
      return "<div class=\"planet-text\">--</div>";
    }

    const buttons = [];

    if (associations.planetId) {
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="planet" data-planet-id="${associations.planetId}">${planetLabel(associations.planetId)} -></button>`
      );
    }

    if (associations.zodiacSignId) {
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="zodiac" data-sign-id="${associations.zodiacSignId}">${zodiacLabel(associations.zodiacSignId)} -></button>`
      );
    }

    if (Number.isFinite(Number(associations.numberValue))) {
      const rawNumber = Math.trunc(Number(associations.numberValue));
      if (rawNumber >= 0) {
        const numberValue = computeDigitalRoot(rawNumber);
        if (numberValue != null) {
          const label = rawNumber === numberValue
            ? `Number ${numberValue}`
            : `Number ${numberValue} (from ${rawNumber})`;
          buttons.push(
            `<button class="alpha-nav-btn" data-nav="number" data-number-value="${numberValue}">${label} -></button>`
          );
        }
      }
    }

    if (associations.tarotCard) {
      const trumpNumber = resolveTarotTrumpNumber(associations.tarotCard);
      const explicitTrumpNumber = Number(associations.tarotTrumpNumber);
      const tarotTrumpNumber = Number.isFinite(explicitTrumpNumber) ? explicitTrumpNumber : trumpNumber;
      const tarotLabel = getDisplayTarotName(associations.tarotCard, tarotTrumpNumber);
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="tarot-card" data-card-name="${associations.tarotCard}" data-trump-number="${tarotTrumpNumber ?? ""}">${tarotLabel} -></button>`
      );
    }

    if (associations.godId || associations.godName) {
      const label = godLabel(associations.godId, associations.godName);
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="god" data-god-id="${associations.godId || ""}" data-god-name="${associations.godName || label}">${label} -></button>`
      );
    }

    if (associations.hebrewLetterId) {
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="alphabet" data-alphabet="hebrew" data-hebrew-letter-id="${associations.hebrewLetterId}">${hebrewLabel(associations.hebrewLetterId)} -></button>`
      );
    }

    if (associations.kabbalahPathNumber != null) {
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="kabbalah" data-path-no="${associations.kabbalahPathNumber}">Path ${associations.kabbalahPathNumber} -></button>`
      );
    }

    if (associations.iChingPlanetaryInfluence) {
      buttons.push(
        `<button class="alpha-nav-btn" data-nav="iching" data-planetary-influence="${associations.iChingPlanetaryInfluence}">I Ching - ${associations.iChingPlanetaryInfluence} -></button>`
      );
    }

    if (!buttons.length) {
      return "<div class=\"planet-text\">--</div>";
    }

    return `<div class="alpha-nav-btns">${buttons.join("")}</div>`;
  }

  function associationSearchText(associations) {
    if (!associations || typeof associations !== "object") {
      return "";
    }

    const tarotAliases = associations.tarotCard && typeof getTarotCardSearchAliases === "function"
      ? getTarotCardSearchAliases(associations.tarotCard, { trumpNumber: associations.tarotTrumpNumber })
      : [];

    return [
      associations.planetId,
      associations.zodiacSignId,
      associations.numberValue,
      associations.tarotCard,
      associations.tarotTrumpNumber,
      ...tarotAliases,
      associations.godId,
      associations.godName,
      associations.hebrewLetterId,
      associations.kabbalahPathNumber,
      associations.iChingPlanetaryInfluence
    ].filter(Boolean).join(" ");
  }

  function holidaySearchText(holiday) {
    return normalizeSearchValue([
      holiday?.name,
      holiday?.kind,
      holiday?.date,
      holiday?.dateRange,
      holiday?.dateText,
      holiday?.monthDayStart,
      holiday?.calendarId,
      holiday?.description,
      associationSearchText(holiday?.associations)
    ].filter(Boolean).join(" "));
  }

  function getSelectedHoliday() {
    return state.holidays.find((holiday) => holiday.id === state.selectedHolidayId) || null;
  }

  function filterBySource(holidays) {
    const source = normalizeSourceFilter(state.selectedSource);
    if (source === "all") {
      return [...holidays];
    }
    return holidays.filter((holiday) => String(holiday?.calendarId || "").trim().toLowerCase() === source);
  }

  function syncControls(elements) {
    if (elements.sourceSelectEl) {
      elements.sourceSelectEl.value = normalizeSourceFilter(state.selectedSource);
    }
    if (elements.yearInputEl) {
      elements.yearInputEl.value = String(state.selectedYear);
    }
    if (elements.searchInputEl) {
      elements.searchInputEl.value = state.searchQuery;
    }
    if (elements.searchClearEl) {
      elements.searchClearEl.disabled = !state.searchQuery;
    }
  }

  function renderList(elements) {
    const { listEl, countEl } = elements;
    if (!listEl) {
      return;
    }

    listEl.innerHTML = "";

    state.filteredHolidays.forEach((holiday) => {
      const isSelected = holiday.id === state.selectedHolidayId;
      const itemEl = document.createElement("div");
      itemEl.className = `planet-list-item${isSelected ? " is-selected" : ""}`;
      itemEl.setAttribute("role", "option");
      itemEl.setAttribute("aria-selected", isSelected ? "true" : "false");
      itemEl.dataset.holidayId = holiday.id;

      const sourceCalendar = calendarLabel(holiday.calendarId);
      const sourceMonth = monthLabelForCalendar(holiday.calendarId, holiday.monthId);
      const sourceDate = holiday?.dateText || holiday?.date || holiday?.dateRange || "--";

      itemEl.innerHTML = `
        <div class="planet-list-name">${holiday?.name || holiday?.id || "Holiday"}</div>
        <div class="planet-list-meta">${sourceCalendar} - ${sourceMonth} - ${sourceDate}</div>
      `;

      itemEl.addEventListener("click", () => {
        selectByHolidayId(holiday.id, elements);
      });

      listEl.appendChild(itemEl);
    });

    if (countEl) {
      const sourceFiltered = filterBySource(state.holidays);
      const activeFilter = normalizeSourceFilter(state.selectedSource);
      const sourceLabel = activeFilter === "all"
        ? ""
        : ` (${calendarLabel(activeFilter)})`;
      countEl.textContent = state.searchQuery
        ? `${state.filteredHolidays.length} of ${sourceFiltered.length} holidays${sourceLabel}`
        : `${sourceFiltered.length} holidays${sourceLabel}`;
    }
  }

  function renderHolidayDetail(holiday) {
    const gregorianDate = resolveHolidayGregorianDate(holiday);
    const gregorianRef = formatGregorianReferenceDate(gregorianDate);
    const hebrewRef = formatCalendarDateFromGregorian(gregorianDate, "hebrew");
    const islamicRef = formatCalendarDateFromGregorian(gregorianDate, "islamic");
    const confidence = String(holiday?.conversionConfidence || holiday?.datePrecision || "approximate").toLowerCase();
    const confidenceLabel = (!(gregorianDate instanceof Date) || Number.isNaN(gregorianDate.getTime()))
      ? "unresolved"
      : (confidence === "exact" ? "exact" : "approximate");
    const monthName = monthLabelForCalendar(holiday?.calendarId, holiday?.monthId);
    const holidayDate = holiday?.dateText || holiday?.date || holiday?.dateRange || "--";
    const sourceMonthLink = holiday?.monthId
      ? `<div class="alpha-nav-btns"><button class="alpha-nav-btn" data-nav="calendar-month" data-calendar-id="${holiday.calendarId || ""}" data-month-id="${holiday.monthId}">Open ${calendarLabel(holiday?.calendarId)} ${monthName} -></button></div>`
      : "";

    return `
      <div class="planet-meta-grid">
        <div class="planet-meta-card">
          <strong>Holiday Facts</strong>
          <div class="planet-text">
            <dl class="alpha-dl">
              <dt>Source Calendar</dt><dd>${calendarLabel(holiday?.calendarId)}</dd>
              <dt>Source Month</dt><dd>${monthName}</dd>
              <dt>Source Date</dt><dd>${holidayDate}</dd>
              <dt>Reference Year</dt><dd>${state.selectedYear}</dd>
              <dt>Conversion</dt><dd>${confidenceLabel}</dd>
            </dl>
          </div>
        </div>
        <div class="planet-meta-card">
          <strong>Cross-Calendar Dates</strong>
          <div class="planet-text">
            <dl class="alpha-dl">
              <dt>Gregorian</dt><dd>${gregorianRef}</dd>
              <dt>Hebrew</dt><dd>${hebrewRef}</dd>
              <dt>Islamic</dt><dd>${islamicRef}</dd>
            </dl>
          </div>
        </div>
        <div class="planet-meta-card">
          <strong>Description</strong>
          <div class="planet-text">${holiday?.description || "--"}</div>
          ${sourceMonthLink}
        </div>
        <div class="planet-meta-card">
          <strong>Associations</strong>
          ${buildAssociationButtons(holiday?.associations)}
        </div>
      </div>
    `;
  }

  function renderDetail(elements) {
    const { detailNameEl, detailSubEl, detailBodyEl } = elements;
    if (!detailNameEl || !detailSubEl || !detailBodyEl) {
      return;
    }

    const holiday = getSelectedHoliday();
    if (!holiday) {
      detailNameEl.textContent = "--";
      detailSubEl.textContent = "Select a holiday to explore";
      detailBodyEl.innerHTML = "";
      return;
    }

    detailNameEl.textContent = holiday?.name || holiday?.id || "Holiday";
    detailSubEl.textContent = `${calendarLabel(holiday?.calendarId)} - ${monthLabelForCalendar(holiday?.calendarId, holiday?.monthId)}`;
    detailBodyEl.innerHTML = renderHolidayDetail(holiday);
    attachNavHandlers(detailBodyEl);
  }

  function applyFilters(elements) {
    const sourceFiltered = filterBySource(state.holidays);
    state.filteredHolidays = state.searchQuery
      ? sourceFiltered.filter((holiday) => holidaySearchText(holiday).includes(state.searchQuery))
      : sourceFiltered;

    if (!state.filteredHolidays.some((holiday) => holiday.id === state.selectedHolidayId)) {
      state.selectedHolidayId = state.filteredHolidays[0]?.id || null;
    }

    syncControls(elements);
    renderList(elements);
    renderDetail(elements);
  }

  function selectByHolidayId(holidayId, elements = getElements()) {
    const target = state.holidays.find((holiday) => holiday.id === holidayId);
    if (!target) {
      return false;
    }

    const targetCalendar = String(target.calendarId || "").trim().toLowerCase();
    const activeFilter = normalizeSourceFilter(state.selectedSource);
    if (activeFilter !== "all" && activeFilter !== targetCalendar) {
      state.selectedSource = targetCalendar || "all";
    }

    if (state.searchQuery && !holidaySearchText(target).includes(state.searchQuery)) {
      state.searchQuery = "";
    }

    state.selectedHolidayId = target.id;
    applyFilters(elements);
    return true;
  }

  function bindControls(elements) {
    if (elements.sourceSelectEl) {
      elements.sourceSelectEl.addEventListener("change", () => {
        state.selectedSource = normalizeSourceFilter(elements.sourceSelectEl.value);
        applyFilters(elements);
      });
    }

    if (elements.yearInputEl) {
      elements.yearInputEl.addEventListener("change", () => {
        const nextYear = Number(elements.yearInputEl.value);
        if (!Number.isFinite(nextYear)) {
          elements.yearInputEl.value = String(state.selectedYear);
          return;
        }

        state.selectedYear = Math.min(2500, Math.max(1900, Math.round(nextYear)));
        elements.yearInputEl.value = String(state.selectedYear);
        renderDetail(elements);
      });
    }

    if (elements.searchInputEl) {
      elements.searchInputEl.addEventListener("input", () => {
        state.searchQuery = normalizeSearchValue(elements.searchInputEl.value);
        applyFilters(elements);
      });
    }

    if (elements.searchClearEl && elements.searchInputEl) {
      elements.searchClearEl.addEventListener("click", () => {
        state.searchQuery = "";
        elements.searchInputEl.value = "";
        applyFilters(elements);
        elements.searchInputEl.focus();
      });
    }
  }

  function attachNavHandlers(detailBodyEl) {
    if (!detailBodyEl) {
      return;
    }

    detailBodyEl.querySelectorAll("[data-nav]").forEach((button) => {
      button.addEventListener("click", () => {
        const navType = button.dataset.nav;

        if (navType === "planet" && button.dataset.planetId) {
          document.dispatchEvent(new CustomEvent("nav:planet", {
            detail: { planetId: button.dataset.planetId }
          }));
          return;
        }

        if (navType === "zodiac" && button.dataset.signId) {
          document.dispatchEvent(new CustomEvent("nav:zodiac", {
            detail: { signId: button.dataset.signId }
          }));
          return;
        }

        if (navType === "number" && button.dataset.numberValue) {
          document.dispatchEvent(new CustomEvent("nav:number", {
            detail: { value: Number(button.dataset.numberValue) }
          }));
          return;
        }

        if (navType === "tarot-card" && button.dataset.cardName) {
          const trumpNumber = Number(button.dataset.trumpNumber);
          document.dispatchEvent(new CustomEvent("nav:tarot-trump", {
            detail: {
              cardName: button.dataset.cardName,
              trumpNumber: Number.isFinite(trumpNumber) ? trumpNumber : undefined
            }
          }));
          return;
        }

        if (navType === "god") {
          document.dispatchEvent(new CustomEvent("nav:gods", {
            detail: {
              godId: button.dataset.godId || undefined,
              godName: button.dataset.godName || undefined
            }
          }));
          return;
        }

        if (navType === "alphabet" && button.dataset.hebrewLetterId) {
          document.dispatchEvent(new CustomEvent("nav:alphabet", {
            detail: {
              alphabet: "hebrew",
              hebrewLetterId: button.dataset.hebrewLetterId
            }
          }));
          return;
        }

        if (navType === "kabbalah" && button.dataset.pathNo) {
          document.dispatchEvent(new CustomEvent("nav:kabbalah-path", {
            detail: { pathNo: Number(button.dataset.pathNo) }
          }));
          return;
        }

        if (navType === "iching" && button.dataset.planetaryInfluence) {
          document.dispatchEvent(new CustomEvent("nav:iching", {
            detail: {
              planetaryInfluence: button.dataset.planetaryInfluence
            }
          }));
          return;
        }

        if (navType === "calendar-month" && button.dataset.monthId) {
          document.dispatchEvent(new CustomEvent("nav:calendar-month", {
            detail: {
              calendarId: button.dataset.calendarId || undefined,
              monthId: button.dataset.monthId
            }
          }));
        }
      });
    });
  }

  function ensureHolidaySection(referenceData, magickDataset) {
    if (!referenceData) {
      return;
    }

    state.referenceData = referenceData;
    state.magickDataset = magickDataset || null;
    state.planetsById = buildPlanetMap(referenceData.planets);
    state.signsById = buildSignsMap(referenceData.signs);
    state.godsById = buildGodsMap(state.magickDataset);
    state.hebrewById = buildHebrewMap(state.magickDataset);

    state.calendarData = {
      gregorian: Array.isArray(referenceData.calendarMonths) ? referenceData.calendarMonths : [],
      hebrew: Array.isArray(referenceData.hebrewCalendar?.months) ? referenceData.hebrewCalendar.months : [],
      islamic: Array.isArray(referenceData.islamicCalendar?.months) ? referenceData.islamicCalendar.months : [],
      "wheel-of-year": Array.isArray(referenceData.wheelOfYear?.months) ? referenceData.wheelOfYear.months : []
    };

    state.holidays = buildAllHolidays();
    if (!state.selectedHolidayId || !state.holidays.some((holiday) => holiday.id === state.selectedHolidayId)) {
      state.selectedHolidayId = state.holidays[0]?.id || null;
    }

    const elements = getElements();

    if (!state.initialized) {
      state.initialized = true;
      bindControls(elements);
    }

    applyFilters(elements);
  }

  window.HolidaySectionUi = {
    ensureHolidaySection,
    selectByHolidayId
  };
})();