(function () {
  "use strict";

  let config = {
    getAlphabets: () => null,
    getGematriaDb: () => null,
    getGematriaElements: () => ({
      cipherEl: null,
      inputEl: null,
      resultEl: null,
      breakdownEl: null,
      modeEls: [],
      matchesEl: null,
      inputLabelEl: null,
      cipherLabelEl: null
    })
  };

  const state = {
    loadingPromise: null,
    db: null,
    listenersBound: false,
    activeCipherId: "",
    forwardInputText: "",
    reverseInputText: "",
    anagramInputText: "",
    activeMode: "forward",
    scriptCharMap: new Map(),
    reverseLookupCache: new Map(),
    anagramLookupCache: new Map(),
    reverseRequestId: 0,
    anagramRequestId: 0
  };

  function getAlphabets() {
    return config.getAlphabets?.() || null;
  }

  function getConfiguredGematriaDb() {
    return config.getGematriaDb?.() || null;
  }

  function getElements() {
    return config.getGematriaElements?.() || {
      cipherEl: null,
      inputEl: null,
      resultEl: null,
      breakdownEl: null,
      modeEls: [],
      matchesEl: null,
      inputLabelEl: null,
      cipherLabelEl: null
    };
  }

  function isReverseMode() {
    return state.activeMode === "reverse";
  }

  function isAnagramMode() {
    return state.activeMode === "anagram";
  }

  function getCurrentInputText() {
    if (isReverseMode()) {
      return state.reverseInputText;
    }

    if (isAnagramMode()) {
      return state.anagramInputText;
    }

    return state.forwardInputText;
  }

  function formatCount(value) {
    const numericValue = Number(value);
    if (!Number.isFinite(numericValue)) {
      return "0";
    }
    return numericValue.toLocaleString();
  }

  function getFallbackGematriaDb() {
    return {
      baseAlphabet: "abcdefghijklmnopqrstuvwxyz",
      ciphers: [
        {
          id: "simple-ordinal",
          name: "Simple Ordinal",
          description: "A=1 ... Z=26",
          values: Array.from({ length: 26 }, (_, index) => index + 1)
        },
        {
          id: "decadic-cipher",
          name: "Decadic Cipher",
          description: "A=1 ... I=9, J=10 ... R=90, S=100 ... Z=800",
          values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800]
        }
      ]
    };
  }

  function normalizeGematriaText(value) {
    return String(value || "")
      .normalize("NFD")
      .replace(/[\u0300-\u036f]/g, "")
      .toLowerCase();
  }

  function transliterationToBaseLetters(transliteration, baseAlphabet) {
    const normalized = normalizeGematriaText(transliteration);
    if (!normalized) {
      return "";
    }

    const primaryVariant = normalized.split(/[\/,;|]/)[0] || normalized;
    const primaryLetters = [...primaryVariant].filter((char) => baseAlphabet.includes(char));
    if (primaryLetters.length) {
      return primaryLetters[0];
    }

    const allLetters = [...normalized].filter((char) => baseAlphabet.includes(char));
    return allLetters[0] || "";
  }

  function addScriptCharMapEntry(map, scriptChar, mappedLetters) {
    const key = String(scriptChar || "").trim();
    const value = String(mappedLetters || "").trim();
    if (!key || !value) {
      return;
    }

    map.set(key, value);
  }

  function buildGematriaScriptMap(baseAlphabet) {
    const map = new Map();
    const alphabets = getAlphabets() || {};
    const hebrewLetters = Array.isArray(alphabets.hebrew) ? alphabets.hebrew : [];
    const greekLetters = Array.isArray(alphabets.greek) ? alphabets.greek : [];

    hebrewLetters.forEach((entry) => {
      const mapped = transliterationToBaseLetters(entry?.transliteration, baseAlphabet);
      addScriptCharMapEntry(map, entry?.char, mapped);
    });

    greekLetters.forEach((entry) => {
      const mapped = transliterationToBaseLetters(entry?.transliteration, baseAlphabet);
      addScriptCharMapEntry(map, entry?.char, mapped);
      addScriptCharMapEntry(map, entry?.charLower, mapped);
      addScriptCharMapEntry(map, entry?.charFinal, mapped);
    });

    const hebrewFinalForms = {
      ך: "k",
      ם: "m",
      ן: "n",
      ף: "p",
      ץ: "t"
    };

    Object.entries(hebrewFinalForms).forEach(([char, mapped]) => {
      if (!map.has(char) && baseAlphabet.includes(mapped)) {
        addScriptCharMapEntry(map, char, mapped);
      }
    });

    if (!map.has("ς") && baseAlphabet.includes("s")) {
      addScriptCharMapEntry(map, "ς", "s");
    }

    return map;
  }

  function refreshScriptMap(baseAlphabetOverride = "") {
    const db = state.db || getFallbackGematriaDb();
    const baseAlphabet = String(baseAlphabetOverride || db.baseAlphabet || "abcdefghijklmnopqrstuvwxyz").toLowerCase();
    state.scriptCharMap = buildGematriaScriptMap(baseAlphabet);
  }

  function sanitizeGematriaDb(db) {
    const baseAlphabet = String(db?.baseAlphabet || "abcdefghijklmnopqrstuvwxyz").toLowerCase();
    const ciphers = Array.isArray(db?.ciphers)
      ? db.ciphers
        .map((cipher) => {
          const id = String(cipher?.id || "").trim();
          const name = String(cipher?.name || "").trim();
          const values = Array.isArray(cipher?.values)
            ? cipher.values.map((value) => Number(value))
            : [];

          if (!id || !name || values.length !== baseAlphabet.length || values.some((value) => !Number.isFinite(value))) {
            return null;
          }

          return {
            id,
            name,
            description: String(cipher?.description || "").trim(),
            values
          };
        })
        .filter(Boolean)
      : [];

    if (!ciphers.length) {
      return getFallbackGematriaDb();
    }

    return {
      baseAlphabet,
      ciphers
    };
  }

  async function loadGematriaDb() {
    if (state.db) {
      return state.db;
    }

    if (state.loadingPromise) {
      return state.loadingPromise;
    }

    state.loadingPromise = Promise.resolve()
      .then(async () => {
        const configuredDb = getConfiguredGematriaDb();
        if (configuredDb) {
          return configuredDb;
        }

        const referenceData = await window.TarotDataService?.loadReferenceData?.();
        return referenceData?.gematriaCiphers || null;
      })
      .then((db) => {
        if (!db) {
          throw new Error("Gematria cipher data unavailable from API.");
        }
        state.db = sanitizeGematriaDb(db);
        return state.db;
      })
      .catch(() => {
        state.db = getFallbackGematriaDb();
        return state.db;
      })
      .finally(() => {
        state.loadingPromise = null;
      });

    return state.loadingPromise;
  }

  function getActiveGematriaCipher() {
    const db = state.db || getFallbackGematriaDb();
    const ciphers = Array.isArray(db.ciphers) ? db.ciphers : [];
    if (!ciphers.length) {
      return null;
    }

    const selectedId = state.activeCipherId || ciphers[0].id;
    return ciphers.find((cipher) => cipher.id === selectedId) || ciphers[0];
  }

  function renderGematriaCipherOptions() {
    const { cipherEl } = getElements();
    if (!cipherEl) {
      return;
    }

    const db = state.db || getFallbackGematriaDb();
    const ciphers = Array.isArray(db.ciphers) ? db.ciphers : [];

    cipherEl.innerHTML = "";
    ciphers.forEach((cipher) => {
      const option = document.createElement("option");
      option.value = cipher.id;
      option.textContent = cipher.name;
      if (cipher.description) {
        option.title = cipher.description;
      }
      cipherEl.appendChild(option);
    });

    const activeCipher = getActiveGematriaCipher();
    state.activeCipherId = activeCipher?.id || "";
    cipherEl.value = state.activeCipherId;
  }

  function setMatchesMessage(matchesEl, message) {
    if (!matchesEl) {
      return;
    }

    matchesEl.replaceChildren();
    const emptyEl = document.createElement("div");
    emptyEl.className = "alpha-gematria-match-empty";
    emptyEl.textContent = message;
    matchesEl.appendChild(emptyEl);
  }

  function clearReverseMatches(matchesEl) {
    if (!matchesEl) {
      return;
    }

    matchesEl.replaceChildren();
    matchesEl.hidden = true;
  }

  function getModeElements(modeEls) {
    return Array.isArray(modeEls)
      ? modeEls.filter((element) => element instanceof HTMLInputElement)
      : [];
  }

  function updateModeUi() {
    const {
      cipherEl,
      inputEl,
      modeEls,
      matchesEl,
      inputLabelEl,
      cipherLabelEl
    } = getElements();

    const reverseMode = isReverseMode();
    const anagramMode = isAnagramMode();
    const radioEls = getModeElements(modeEls);

    radioEls.forEach((element) => {
      element.checked = String(element.value || "") === state.activeMode;
    });

    if (inputLabelEl) {
      inputLabelEl.textContent = reverseMode ? "Value" : (anagramMode ? "Letters" : "Text");
    }

    if (cipherLabelEl) {
      cipherLabelEl.textContent = (reverseMode || anagramMode) ? "Cipher (not used in this mode)" : "Cipher";
    }

    if (cipherEl) {
      const disableCipher = reverseMode || anagramMode;
      cipherEl.disabled = disableCipher;
      cipherEl.closest(".alpha-gematria-field")?.classList.toggle("is-disabled", disableCipher);
    }

    if (inputEl) {
      inputEl.placeholder = reverseMode
        ? "Enter a whole number, e.g. 33"
        : (anagramMode ? "Type letters or a word, e.g. listen" : "Type or paste text");
      inputEl.inputMode = reverseMode ? "numeric" : "text";
      inputEl.spellcheck = !(reverseMode || anagramMode);

      const nextValue = getCurrentInputText();
      if (inputEl.value !== nextValue) {
        inputEl.value = nextValue;
      }
    }

    if (!reverseMode && !anagramMode) {
      clearReverseMatches(matchesEl);
    }
  }

  function parseReverseLookupValue(rawValue) {
    const normalizedValue = String(rawValue || "").trim();
    if (!normalizedValue) {
      return null;
    }

    if (!/^\d+$/.test(normalizedValue)) {
      return Number.NaN;
    }

    const numericValue = Number(normalizedValue);
    if (!Number.isSafeInteger(numericValue)) {
      return Number.NaN;
    }

    return numericValue;
  }

  async function loadReverseLookup(value) {
    const cacheKey = String(value);
    if (state.reverseLookupCache.has(cacheKey)) {
      return state.reverseLookupCache.get(cacheKey);
    }

    const payload = await window.TarotDataService?.loadGematriaWordsByValue?.(value);
    state.reverseLookupCache.set(cacheKey, payload);
    return payload;
  }

  async function loadAnagramLookup(text) {
    const cacheKey = String(text || "").trim().toLowerCase();
    if (state.anagramLookupCache.has(cacheKey)) {
      return state.anagramLookupCache.get(cacheKey);
    }

    const payload = await window.TarotDataService?.loadWordAnagrams?.(text);
    state.anagramLookupCache.set(cacheKey, payload);
    return payload;
  }

  function renderReverseLookupMatches(payload, numericValue) {
    const { resultEl, breakdownEl, matchesEl } = getElements();
    if (!resultEl || !breakdownEl || !matchesEl) {
      return;
    }

    const matches = Array.isArray(payload?.matches) ? payload.matches : [];
    const count = Number(payload?.count);
    const displayCount = Number.isFinite(count) ? count : matches.length;
    const ciphers = Array.isArray(payload?.ciphers) ? payload.ciphers : [];
    const cipherCount = Number(payload?.cipherCount);
    const displayCipherCount = Number.isFinite(cipherCount) ? cipherCount : ciphers.length;
    const visibleMatches = matches.slice(0, 120);

    resultEl.textContent = `Value: ${formatCount(numericValue)}`;

    if (!displayCount) {
      breakdownEl.textContent = "No words matched this reverse gematria value.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "No matches found in the reverse gematria index.");
      return;
    }

    const topCipherSummary = ciphers
      .slice(0, 6)
      .map((cipher) => `${String(cipher?.name || cipher?.id || "Unknown")} ${formatCount(cipher?.count)}`)
      .join(" · ");

    breakdownEl.textContent = `Found ${formatCount(displayCount)} matches across ${formatCount(displayCipherCount)} ciphers.${topCipherSummary ? ` Top ciphers: ${topCipherSummary}.` : ""}${displayCount > visibleMatches.length ? ` Showing first ${formatCount(visibleMatches.length)}.` : ""}`;

    const fragment = document.createDocumentFragment();
    visibleMatches.forEach((match) => {
      const cardEl = document.createElement("article");
      cardEl.className = "alpha-gematria-match";

      const wordEl = document.createElement("div");
      wordEl.className = "alpha-gematria-match-word";
      wordEl.textContent = String(match?.word || "--");
      cardEl.appendChild(wordEl);

      const definition = String(match?.definition || "").trim();
      if (definition) {
        const definitionEl = document.createElement("div");
        definitionEl.className = "alpha-gematria-match-definition";
        definitionEl.textContent = definition;
        cardEl.appendChild(definitionEl);
      }

      const ciphersEl = document.createElement("div");
      ciphersEl.className = "alpha-gematria-match-ciphers";
      const matchCiphers = Array.isArray(match?.ciphers) ? match.ciphers : [];
      matchCiphers.slice(0, 6).forEach((cipher) => {
        const chipEl = document.createElement("span");
        chipEl.className = "alpha-gematria-match-cipher";
        chipEl.textContent = String(cipher?.name || cipher?.id || "Unknown");
        ciphersEl.appendChild(chipEl);
      });
      if (matchCiphers.length > 6) {
        const extraEl = document.createElement("span");
        extraEl.className = "alpha-gematria-match-cipher";
        extraEl.textContent = `+${matchCiphers.length - 6} more`;
        ciphersEl.appendChild(extraEl);
      }
      cardEl.appendChild(ciphersEl);

      fragment.appendChild(cardEl);
    });

    matchesEl.replaceChildren(fragment);
    matchesEl.hidden = false;
  }

  async function renderReverseLookupResult() {
    const { resultEl, breakdownEl, matchesEl } = getElements();
    if (!resultEl || !breakdownEl || !matchesEl) {
      return;
    }

    const rawValue = state.reverseInputText;
    if (!String(rawValue || "").trim()) {
      resultEl.textContent = "Value: --";
      breakdownEl.textContent = "Enter a whole number to find words across all available ciphers.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Reverse lookup searches the API-backed gematria word index.");
      return;
    }

    const numericValue = parseReverseLookupValue(rawValue);
    if (!Number.isFinite(numericValue)) {
      resultEl.textContent = "Value: --";
      breakdownEl.textContent = "Enter digits only to search the reverse gematria index.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Use a whole number such as 33 or 418.");
      return;
    }

    const requestId = state.reverseRequestId + 1;
    state.reverseRequestId = requestId;
    resultEl.textContent = `Value: ${formatCount(numericValue)}`;
    breakdownEl.textContent = "Searching reverse gematria index...";
    matchesEl.hidden = false;
    setMatchesMessage(matchesEl, "Loading matching words...");

    try {
      const payload = await loadReverseLookup(numericValue);
      if (requestId !== state.reverseRequestId || !isReverseMode()) {
        return;
      }
      renderReverseLookupMatches(payload, numericValue);
    } catch {
      if (requestId !== state.reverseRequestId || !isReverseMode()) {
        return;
      }
      resultEl.textContent = `Value: ${formatCount(numericValue)}`;
      breakdownEl.textContent = "Reverse lookup is unavailable right now.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Unable to load reverse gematria words from the API.");
    }
  }

  function renderAnagramMatches(payload) {
    const { resultEl, breakdownEl, matchesEl } = getElements();
    if (!resultEl || !breakdownEl || !matchesEl) {
      return;
    }

    const matches = Array.isArray(payload?.matches) ? payload.matches : [];
    const count = Number(payload?.count);
    const displayCount = Number.isFinite(count) ? count : matches.length;
    const visibleMatches = matches.slice(0, 120);
    const letterCount = Number(payload?.letterCount);

    resultEl.textContent = `Anagrams: ${formatCount(displayCount)}`;

    if (!displayCount) {
      breakdownEl.textContent = "No exact dictionary anagrams matched these letters.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Try another letter set or a different spelling.");
      return;
    }

    breakdownEl.textContent = `Found ${formatCount(displayCount)} anagrams for ${formatCount(letterCount)} letters.${displayCount > visibleMatches.length ? ` Showing first ${formatCount(visibleMatches.length)}.` : ""}`;

    const fragment = document.createDocumentFragment();
    visibleMatches.forEach((match) => {
      const cardEl = document.createElement("article");
      cardEl.className = "alpha-gematria-match";

      const wordEl = document.createElement("div");
      wordEl.className = "alpha-gematria-match-word";
      wordEl.textContent = String(match?.word || "--");
      cardEl.appendChild(wordEl);

      const definition = String(match?.definition || "").trim();
      if (definition) {
        const definitionEl = document.createElement("div");
        definitionEl.className = "alpha-gematria-match-definition";
        definitionEl.textContent = definition;
        cardEl.appendChild(definitionEl);
      }

      fragment.appendChild(cardEl);
    });

    matchesEl.replaceChildren(fragment);
    matchesEl.hidden = false;
  }

  async function renderAnagramResult() {
    const { resultEl, breakdownEl, matchesEl } = getElements();
    if (!resultEl || !breakdownEl || !matchesEl) {
      return;
    }

    const rawText = state.anagramInputText;
    if (!String(rawText || "").trim()) {
      resultEl.textContent = "Anagrams: --";
      breakdownEl.textContent = "Enter letters to search for exact dictionary anagrams.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Anagram Maker finds exact word anagrams from the API word index.");
      return;
    }

    const requestId = state.anagramRequestId + 1;
    state.anagramRequestId = requestId;
    resultEl.textContent = "Anagrams: --";
    breakdownEl.textContent = "Searching anagram index...";
    matchesEl.hidden = false;
    setMatchesMessage(matchesEl, "Loading anagrams...");

    try {
      const payload = await loadAnagramLookup(rawText);
      if (requestId !== state.anagramRequestId || !isAnagramMode()) {
        return;
      }
      renderAnagramMatches(payload);
    } catch {
      if (requestId !== state.anagramRequestId || !isAnagramMode()) {
        return;
      }
      resultEl.textContent = "Anagrams: --";
      breakdownEl.textContent = "Anagram lookup is unavailable right now.";
      matchesEl.hidden = false;
      setMatchesMessage(matchesEl, "Unable to load anagrams from the API.");
    }
  }

  function computeGematria(text, cipher, baseAlphabet) {
    const normalizedInput = normalizeGematriaText(text);
    const scriptMap = state.scriptCharMap instanceof Map
      ? state.scriptCharMap
      : new Map();

    const letterParts = [];
    let total = 0;
    let count = 0;

    [...normalizedInput].forEach((char) => {
      const mappedLetters = baseAlphabet.includes(char)
        ? char
        : (scriptMap.get(char) || "");

      if (!mappedLetters) {
        return;
      }

      [...mappedLetters].forEach((mappedChar) => {
        const index = baseAlphabet.indexOf(mappedChar);
        if (index < 0) {
          return;
        }

        const value = Number(cipher.values[index]);
        if (!Number.isFinite(value)) {
          return;
        }

        count += 1;
        total += value;
        letterParts.push(`${mappedChar.toUpperCase()}(${value})`);
      });
    });

    return {
      total,
      count,
      breakdown: letterParts.join(" + ")
    };
  }

  function renderForwardGematriaResult() {
    const { resultEl, breakdownEl } = getElements();
    if (!resultEl || !breakdownEl) {
      return;
    }

    const db = state.db || getFallbackGematriaDb();
    if (!(state.scriptCharMap instanceof Map) || !state.scriptCharMap.size) {
      refreshScriptMap(db.baseAlphabet);
    }

    const cipher = getActiveGematriaCipher();
    if (!cipher) {
      resultEl.textContent = "Total: --";
      breakdownEl.textContent = "No ciphers available.";
      return;
    }

    const { total, count, breakdown } = computeGematria(state.forwardInputText, cipher, db.baseAlphabet);

    resultEl.textContent = `Total: ${total}`;
    if (!count) {
      breakdownEl.textContent = `Using ${cipher.name}. Enter English, Greek, or Hebrew letters to calculate.`;
      return;
    }

    breakdownEl.textContent = `${cipher.name} · ${count} letters · ${breakdown} = ${total}`;
  }

  function renderGematriaResult() {
    updateModeUi();

    if (isReverseMode()) {
      void renderReverseLookupResult();
      return;
    }

    if (isAnagramMode()) {
      void renderAnagramResult();
      return;
    }

    renderForwardGematriaResult();
  }

  function bindGematriaListeners() {
    const { cipherEl, inputEl, modeEls } = getElements();
    if (state.listenersBound || !cipherEl || !inputEl) {
      return;
    }

    cipherEl.addEventListener("change", () => {
      state.activeCipherId = String(cipherEl.value || "").trim();
      renderGematriaResult();
    });

    inputEl.addEventListener("input", () => {
      if (isReverseMode()) {
        state.reverseInputText = inputEl.value || "";
      } else if (isAnagramMode()) {
        state.anagramInputText = inputEl.value || "";
      } else {
        state.forwardInputText = inputEl.value || "";
      }
      renderGematriaResult();
    });

    getModeElements(modeEls).forEach((modeEl) => {
      modeEl.addEventListener("change", () => {
        if (!modeEl.checked) {
          return;
        }

        state.activeMode = String(modeEl.value || "forward").trim() || "forward";
        updateModeUi();
        renderGematriaResult();
      });
    });

    state.listenersBound = true;
  }

  function ensureCalculator() {
    const { cipherEl, inputEl, resultEl, breakdownEl } = getElements();
    if (!cipherEl || !inputEl || !resultEl || !breakdownEl) {
      return;
    }

    bindGematriaListeners();
    updateModeUi();

    void loadGematriaDb().then(() => {
      refreshScriptMap((state.db || getFallbackGematriaDb()).baseAlphabet);
      renderGematriaCipherOptions();
      renderGematriaResult();
    });
  }

  function init(nextConfig = {}) {
    config = {
      ...config,
      ...nextConfig
    };

    const configuredDb = getConfiguredGematriaDb();
    if (configuredDb) {
      state.db = sanitizeGematriaDb(configuredDb);
    }
  }

  window.AlphabetGematriaUi = {
    ...(window.AlphabetGematriaUi || {}),
    init,
    refreshScriptMap,
    ensureCalculator
  };
})();