/**
 * お気に入り物件（localStorage・ログイン不要）。
 * 一覧カード([data-listing-favorite])・物件詳細ページ・共通ヘッダー件数・
 * お気に入り一覧ページ(/test/favorites/)から共通で利用する正本モジュール。
 *
 * 旧実装 listing-favorites.js（キー: rakusumo_listing_favorites_v1、id/urlのみ保存）は
 * このモジュールに統合済み。旧キーのデータは初回読み込み時に自動移行する
 * （タイトル・画像・賃料・住所は移行時点では空文字のまま。次回そのカードを
 * 再度お気に入り登録し直すと最新情報で上書きされる）。
 */
(function (root, factory) {
  if (typeof module === 'object' && module.exports) {
    module.exports = factory();
  } else {
    root.PropertyFavorites = factory();
  }
})(typeof globalThis !== 'undefined' ? globalThis : this, function () {
  'use strict';

  var STORAGE_KEY = 'rakusumo_favorite_properties_v1';
  var LEGACY_STORAGE_KEY = 'rakusumo_listing_favorites_v1';
  var CHANGE_EVENT = 'favorites:changed';
  var hasWindow = typeof window !== 'undefined';
  var doc = hasWindow ? window.document : (typeof document !== 'undefined' ? document : null);
  var toastEl = null;
  var toastTimer = null;

  function ensureToastElement() {
    if (!doc || typeof doc.createElement !== 'function') return null;
    if (toastEl && toastEl.parentNode) return toastEl;
    toastEl = doc.getElementById('tpFavoritesToast');
    if (toastEl) return toastEl;
    toastEl = doc.createElement('div');
    toastEl.id = 'tpFavoritesToast';
    toastEl.className = 'tp-favorites-toast';
    toastEl.setAttribute('role', 'status');
    toastEl.setAttribute('aria-live', 'polite');
    toastEl.hidden = true;
    if (doc.body) doc.body.appendChild(toastEl);
    return toastEl;
  }

  function showToast(message) {
    var el = ensureToastElement();
    if (!el) return;
    el.textContent = String(message || '');
    el.hidden = false;
    el.classList.add('is-visible');
    if (toastTimer) clearTimeout(toastTimer);
    toastTimer = setTimeout(function () {
      el.classList.remove('is-visible');
      el.hidden = true;
    }, 2500);
  }

  function safeGetItem(key) {
    try {
      if (!hasWindow || !window.localStorage) return null;
      return window.localStorage.getItem(key);
    } catch (_e) {
      return null;
    }
  }

  function safeSetItem(key, val) {
    try {
      if (!hasWindow || !window.localStorage) return false;
      window.localStorage.setItem(key, val);
      return true;
    } catch (_e) {
      /* 容量超過・プライベートモード等 */
      return false;
    }
  }

  var didMigrate = false;

  /** 旧 listing-favorites.js のキーから id/url のみ引き継ぐ（他情報は空文字）。 */
  function migrateLegacyStore() {
    if (didMigrate) return {};
    didMigrate = true;
    var raw = safeGetItem(LEGACY_STORAGE_KEY);
    if (!raw) return {};
    try {
      var parsed = JSON.parse(raw);
      if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) return {};
      var out = {};
      Object.keys(parsed).forEach(function (key) {
        var rec = parsed[key];
        if (!rec || typeof rec !== 'object') return;
        var id = String(rec.id || '').trim();
        if (!id || out[id]) return;
        out[id] = {
          propertyId: id,
          propertyUrl: String(rec.url || ''),
          title: '',
          imageUrl: '',
          rentText: '',
          address: '',
          savedAt: typeof rec.savedAt === 'number' ? rec.savedAt : Date.now(),
        };
      });
      if (Object.keys(out).length > 0) {
        safeSetItem(STORAGE_KEY, JSON.stringify(out));
      }
      return out;
    } catch (_e) {
      return {};
    }
  }

  function loadStore() {
    var raw = safeGetItem(STORAGE_KEY);
    if (raw == null) return migrateLegacyStore();
    try {
      var parsed = JSON.parse(raw);
      if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
        return parsed;
      }
      return {};
    } catch (_e) {
      /* 破損データ: 壊さず空扱いにする（上書き保存はしない） */
      return {};
    }
  }

  function saveStore(map) {
    return safeSetItem(STORAGE_KEY, JSON.stringify(map || {}));
  }

  function normalizeId(id) {
    return String(id == null ? '' : id).trim();
  }

  function getAll() {
    var map = loadStore();
    return Object.keys(map)
      .map(function (k) {
        return map[k];
      })
      .filter(function (rec) {
        return rec && typeof rec === 'object';
      })
      .sort(function (a, b) {
        return (b.savedAt || 0) - (a.savedAt || 0);
      });
  }

  function count() {
    return Object.keys(loadStore()).length;
  }

  function isFavorite(id) {
    id = normalizeId(id);
    if (!id) return false;
    var map = loadStore();
    return !!map[id];
  }

  function dispatchChange() {
    if (!hasWindow || typeof window.dispatchEvent !== 'function') return;
    try {
      var ev;
      if (typeof window.CustomEvent === 'function') {
        ev = new window.CustomEvent(CHANGE_EVENT, { detail: { count: count() } });
      } else if (doc && typeof doc.createEvent === 'function') {
        ev = doc.createEvent('Event');
        ev.initEvent(CHANGE_EVENT, true, true);
      }
      if (ev) window.dispatchEvent(ev);
    } catch (_e) {
      /* noop */
    }
  }

  function add(data) {
    data = data || {};
    var id = normalizeId(data.propertyId);
    if (!id) return false;
    var map = loadStore();
    map[id] = {
      propertyId: id,
      propertyUrl: String(data.propertyUrl || ''),
      title: String(data.title || ''),
      imageUrl: String(data.imageUrl || ''),
      rentText: String(data.rentText || ''),
      address: String(data.address || ''),
      savedAt: Date.now(),
    };
    saveStore(map);
    dispatchChange();
    return true;
  }

  function remove(id) {
    id = normalizeId(id);
    if (!id) return false;
    var map = loadStore();
    if (!map[id]) return false;
    delete map[id];
    saveStore(map);
    dispatchChange();
    return true;
  }

  function clearAll() {
    saveStore({});
    dispatchChange();
  }

  function dataFromButton(btn) {
    return {
      propertyId: btn.getAttribute('data-property-id') || '',
      propertyUrl: btn.getAttribute('data-property-url') || '',
      title: btn.getAttribute('data-property-title') || '',
      imageUrl: btn.getAttribute('data-property-image') || '',
      rentText: btn.getAttribute('data-property-rent') || '',
      address: btn.getAttribute('data-property-address') || '',
    };
  }

  function syncButton(btn) {
    if (!btn) return;
    var id = normalizeId(btn.getAttribute('data-property-id'));
    var on = id !== '' && isFavorite(id);
    if (btn.classList) btn.classList.toggle('is-active', on);
    btn.setAttribute('aria-pressed', on ? 'true' : 'false');
    btn.setAttribute('aria-label', on ? 'お気に入りを解除' : 'お気に入りに追加');
  }

  function toggleFromButton(btn) {
    if (!btn) return;
    var id = normalizeId(btn.getAttribute('data-property-id'));
    if (!id) return;
    var wasFavorite = isFavorite(id);
    if (wasFavorite) {
      remove(id);
      showToast('お気に入りから削除しました');
    } else {
      add(dataFromButton(btn));
      showToast('お気に入りに追加しました');
    }
    syncButton(btn);
    updateCountBadges();
  }

  function initButtons(rootEl) {
    var scope = rootEl && typeof rootEl.querySelectorAll === 'function' ? rootEl : doc;
    if (!scope || typeof scope.querySelectorAll !== 'function') return;
    var list = scope.querySelectorAll('[data-listing-favorite]');
    for (var i = 0; i < list.length; i++) {
      syncButton(list[i]);
    }
  }

  function updateCountBadges() {
    if (!doc || typeof doc.querySelectorAll !== 'function') return;
    var n = count();
    var badges = doc.querySelectorAll('[data-favorites-count]');
    for (var i = 0; i < badges.length; i++) {
      badges[i].textContent = n > 0 ? String(n) : '';
      badges[i].hidden = n <= 0;
    }
    var labels = doc.querySelectorAll('[data-favorites-nav-label]');
    for (var j = 0; j < labels.length; j++) {
      labels[j].textContent = n > 0 ? 'お気に入り（' + n + '）' : 'お気に入り';
    }
  }

  var delegatedBound = false;
  function bindDelegatedEvents() {
    if (delegatedBound || !doc || typeof doc.addEventListener !== 'function') return;
    delegatedBound = true;
    doc.addEventListener('click', function (e) {
      var target = e.target;
      var btn = target && typeof target.closest === 'function' ? target.closest('[data-listing-favorite]') : null;
      if (!btn) return;
      e.preventDefault();
      e.stopPropagation();
      toggleFromButton(btn);
    });
    if (hasWindow && typeof window.addEventListener === 'function') {
      window.addEventListener(CHANGE_EVENT, updateCountBadges);
      window.addEventListener('storage', function (e) {
        if (e && e.key && e.key !== STORAGE_KEY) return;
        updateCountBadges();
        initButtons(doc);
      });
    }
  }

  function init(rootEl) {
    bindDelegatedEvents();
    initButtons(rootEl);
    updateCountBadges();
  }

  if (doc) {
    var mountToast = function () {
      ensureToastElement();
      init(doc);
    };
    if (doc.readyState === 'loading') {
      doc.addEventListener('DOMContentLoaded', mountToast);
    } else {
      mountToast();
    }
  }

  return {
    STORAGE_KEY: STORAGE_KEY,
    LEGACY_STORAGE_KEY: LEGACY_STORAGE_KEY,
    CHANGE_EVENT: CHANGE_EVENT,
    getAll: getAll,
    count: count,
    isFavorite: isFavorite,
    add: add,
    remove: remove,
    clearAll: clearAll,
    dataFromButton: dataFromButton,
    syncButton: syncButton,
    toggleFromButton: toggleFromButton,
    init: init,
    initButtons: initButtons,
    updateCountBadges: updateCountBadges,
    showToast: showToast,
  };
});